From patchwork Tue Jan 19 17:44:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 366299 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8CC7DC433E6 for ; Tue, 19 Jan 2021 22:25:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6400022E01 for ; Tue, 19 Jan 2021 22:25:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727834AbhASWZV (ORCPT ); Tue, 19 Jan 2021 17:25:21 -0500 Received: from m-r2.th.seeweb.it ([5.144.164.171]:46863 "EHLO m-r2.th.seeweb.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728488AbhASRq0 (ORCPT ); Tue, 19 Jan 2021 12:46:26 -0500 Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id 08E053F0B2; Tue, 19 Jan 2021 18:44:23 +0100 (CET) From: AngeloGioacchino Del Regno To: linux-arm-msm@vger.kernel.org Cc: agross@kernel.org, bjorn.andersson@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, sumit.semwal@linaro.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, phone-devel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, AngeloGioacchino Del Regno Subject: [PATCH v4 1/7] regulator: qcom-labibb: Switch voltage ops from linear_range to linear Date: Tue, 19 Jan 2021 18:44:15 +0100 Message-Id: <20210119174421.226541-2-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210119174421.226541-1-angelogioacchino.delregno@somainline.org> References: <20210119174421.226541-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The LAB and IBB regulator have just one range and it is useless to use linear_range ops, as these are used to express multiple linear ranges. Switch list_voltage and map_voltage callbacks to *_linear instead. Signed-off-by: AngeloGioacchino Del Regno --- drivers/regulator/qcom-labibb-regulator.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/regulator/qcom-labibb-regulator.c b/drivers/regulator/qcom-labibb-regulator.c index 9f51c96f16fb..0fe0f6bce4cf 100644 --- a/drivers/regulator/qcom-labibb-regulator.c +++ b/drivers/regulator/qcom-labibb-regulator.c @@ -59,8 +59,8 @@ static const struct regulator_ops qcom_labibb_ops = { .is_enabled = regulator_is_enabled_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, - .list_voltage = regulator_list_voltage_linear_range, - .map_voltage = regulator_map_voltage_linear_range, + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, }; static const struct regulator_desc pmi8998_lab_desc = { @@ -76,10 +76,8 @@ static const struct regulator_desc pmi8998_lab_desc = { .off_on_delay = LABIBB_OFF_ON_DELAY, .owner = THIS_MODULE, .type = REGULATOR_VOLTAGE, - .linear_ranges = (struct linear_range[]) { - REGULATOR_LINEAR_RANGE(4600000, 0, 15, 100000), - }, - .n_linear_ranges = 1, + .min_uV = 4600000, + .uV_step = 100000, .n_voltages = 16, .ops = &qcom_labibb_ops, }; @@ -97,10 +95,8 @@ static const struct regulator_desc pmi8998_ibb_desc = { .off_on_delay = LABIBB_OFF_ON_DELAY, .owner = THIS_MODULE, .type = REGULATOR_VOLTAGE, - .linear_ranges = (struct linear_range[]) { - REGULATOR_LINEAR_RANGE(1400000, 0, 63, 100000), - }, - .n_linear_ranges = 1, + .min_uV = 1400000, + .uV_step = 100000, .n_voltages = 64, .ops = &qcom_labibb_ops, }; From patchwork Tue Jan 19 17:44:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 366301 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BE2BC433E0 for ; Tue, 19 Jan 2021 22:01:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 68C1022E01 for ; Tue, 19 Jan 2021 22:01:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728307AbhASV6t (ORCPT ); Tue, 19 Jan 2021 16:58:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729059AbhASRrL (ORCPT ); Tue, 19 Jan 2021 12:47:11 -0500 Received: from relay05.th.seeweb.it (relay05.th.seeweb.it [IPv6:2001:4b7a:2000:18::166]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 948EAC061794; Tue, 19 Jan 2021 09:44:26 -0800 (PST) Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id 6BF3A3F179; Tue, 19 Jan 2021 18:44:23 +0100 (CET) From: AngeloGioacchino Del Regno To: linux-arm-msm@vger.kernel.org Cc: agross@kernel.org, bjorn.andersson@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, sumit.semwal@linaro.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, phone-devel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, AngeloGioacchino Del Regno Subject: [PATCH v4 2/7] regulator: qcom-labibb: Implement current limiting Date: Tue, 19 Jan 2021 18:44:16 +0100 Message-Id: <20210119174421.226541-3-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210119174421.226541-1-angelogioacchino.delregno@somainline.org> References: <20210119174421.226541-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org LAB and IBB regulators can be current-limited by setting the appropriate registers, but this operation is granted only after sending an unlock code for secure access. Besides the secure access, it would be possible to use the regmap helper for get_current_limit, as there is no security blocking reads, but I chose not to as to avoid having a very big array containing current limits, especially for IBB. That said, these regulators support current limiting for: - LAB (pos): 200-1600mA, with 200mA per step (8 steps), - IBB (neg): 0-1550mA, with 50mA per step (32 steps). Signed-off-by: AngeloGioacchino Del Regno --- drivers/regulator/qcom-labibb-regulator.c | 92 +++++++++++++++++++++++ 1 file changed, 92 insertions(+) diff --git a/drivers/regulator/qcom-labibb-regulator.c b/drivers/regulator/qcom-labibb-regulator.c index 0fe0f6bce4cf..0643713d6aad 100644 --- a/drivers/regulator/qcom-labibb-regulator.c +++ b/drivers/regulator/qcom-labibb-regulator.c @@ -29,6 +29,15 @@ #define LABIBB_STATUS1_VREG_OK_BIT BIT(7) #define LABIBB_CONTROL_ENABLE BIT(7) +#define REG_LABIBB_CURRENT_LIMIT 0x4b + #define LAB_CURRENT_LIMIT_MASK GENMASK(2, 0) + #define IBB_CURRENT_LIMIT_MASK GENMASK(4, 0) + #define LAB_CURRENT_LIMIT_OVERRIDE_EN BIT(3) + #define LABIBB_CURRENT_LIMIT_EN BIT(7) + +#define REG_LABIBB_SEC_ACCESS 0xd0 + #define LABIBB_SEC_UNLOCK_CODE 0xa5 + #define LAB_ENABLE_CTL_MASK BIT(7) #define IBB_ENABLE_CTL_MASK (BIT(7) | BIT(6)) @@ -37,11 +46,18 @@ #define IBB_ENABLE_TIME (LABIBB_OFF_ON_DELAY * 10) #define LABIBB_POLL_ENABLED_TIME 1000 +struct labibb_current_limits { + u32 uA_min; + u32 uA_step; + u8 ovr_val; +}; + struct labibb_regulator { struct regulator_desc desc; struct device *dev; struct regmap *regmap; struct regulator_dev *rdev; + struct labibb_current_limits uA_limits; u16 base; u8 type; }; @@ -53,6 +69,57 @@ struct labibb_regulator_data { const struct regulator_desc *desc; }; +static int qcom_labibb_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct labibb_regulator *vreg = rdev_get_drvdata(rdev); + struct regulator_desc *desc = &vreg->desc; + struct labibb_current_limits *lim = &vreg->uA_limits; + u32 mask, val; + int i, ret, sel = -1; + + if (min_uA < lim->uA_min || max_uA < lim->uA_min) + return -EINVAL; + + for (i = 0; i < desc->n_current_limits; i++) { + int uA_limit = (lim->uA_step * i) + lim->uA_min; + + if (max_uA >= uA_limit && min_uA <= uA_limit) + sel = i; + } + if (sel < 0) + return -EINVAL; + + /* Current limit setting needs secure access */ + ret = regmap_write(vreg->regmap, vreg->base + REG_LABIBB_SEC_ACCESS, + LABIBB_SEC_UNLOCK_CODE); + if (ret) + return ret; + + mask = desc->csel_mask | lim->ovr_val; + mask |= LABIBB_CURRENT_LIMIT_EN; + val = (u32)sel | lim->ovr_val; + val |= LABIBB_CURRENT_LIMIT_EN; + + return regmap_update_bits(vreg->regmap, desc->csel_reg, mask, val); +} + +static int qcom_labibb_get_current_limit(struct regulator_dev *rdev) +{ + struct labibb_regulator *vreg = rdev_get_drvdata(rdev); + struct regulator_desc *desc = &vreg->desc; + struct labibb_current_limits *lim = &vreg->uA_limits; + unsigned int cur_step; + int ret; + + ret = regmap_read(vreg->regmap, desc->csel_reg, &cur_step); + if (ret) + return ret; + cur_step &= desc->csel_mask; + + return (cur_step * lim->uA_step) + lim->uA_min; +} + static const struct regulator_ops qcom_labibb_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, @@ -61,6 +128,8 @@ static const struct regulator_ops qcom_labibb_ops = { .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, + .set_current_limit = qcom_labibb_set_current_limit, + .get_current_limit = qcom_labibb_get_current_limit, }; static const struct regulator_desc pmi8998_lab_desc = { @@ -73,6 +142,9 @@ static const struct regulator_desc pmi8998_lab_desc = { .vsel_mask = LAB_VOLTAGE_SET_MASK, .apply_reg = (PMI8998_LAB_REG_BASE + REG_LABIBB_VOLTAGE), .apply_bit = LABIBB_VOLTAGE_OVERRIDE_EN, + .csel_reg = (PMI8998_LAB_REG_BASE + REG_LABIBB_CURRENT_LIMIT), + .csel_mask = LAB_CURRENT_LIMIT_MASK, + .n_current_limits = 8, .off_on_delay = LABIBB_OFF_ON_DELAY, .owner = THIS_MODULE, .type = REGULATOR_VOLTAGE, @@ -92,6 +164,9 @@ static const struct regulator_desc pmi8998_ibb_desc = { .vsel_mask = IBB_VOLTAGE_SET_MASK, .apply_reg = (PMI8998_IBB_REG_BASE + REG_LABIBB_VOLTAGE), .apply_bit = LABIBB_VOLTAGE_OVERRIDE_EN, + .csel_reg = (PMI8998_IBB_REG_BASE + REG_LABIBB_CURRENT_LIMIT), + .csel_mask = IBB_CURRENT_LIMIT_MASK, + .n_current_limits = 32, .off_on_delay = LABIBB_OFF_ON_DELAY, .owner = THIS_MODULE, .type = REGULATOR_VOLTAGE, @@ -163,6 +238,23 @@ static int qcom_labibb_regulator_probe(struct platform_device *pdev) vreg->base = reg_data->base; vreg->type = reg_data->type; + switch (vreg->type) { + case QCOM_LAB_TYPE: + /* LAB Limits: 200-1600mA */ + vreg->uA_limits.uA_min = 200000; + vreg->uA_limits.uA_step = 200000; + vreg->uA_limits.ovr_val = LAB_CURRENT_LIMIT_OVERRIDE_EN; + break; + case QCOM_IBB_TYPE: + /* IBB Limits: 0-1550mA */ + vreg->uA_limits.uA_min = 0; + vreg->uA_limits.uA_step = 50000; + vreg->uA_limits.ovr_val = 0; /* No override bit */ + break; + default: + return -EINVAL; + } + memcpy(&vreg->desc, reg_data->desc, sizeof(vreg->desc)); vreg->desc.of_match = reg_data->name; vreg->desc.name = reg_data->name; From patchwork Tue Jan 19 17:45:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 366205 Delivered-To: patch@linaro.org Received: by 2002:a02:a60d:0:0:0:0:0 with SMTP id c13csp1023678jam; Tue, 19 Jan 2021 10:45:56 -0800 (PST) X-Google-Smtp-Source: ABdhPJx0teZMGKMTmLWY+LCmjoRmVYgH3PPAUKll9oMdweaZJ0SJ7XnLA/so2z1E/pGkPTasGy8P X-Received: by 2002:a50:fd83:: with SMTP id o3mr537777edt.359.1611081956717; Tue, 19 Jan 2021 10:45:56 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1611081956; cv=none; d=google.com; s=arc-20160816; b=xWKb+UUMl+rfVqoTJOPapRKAPb/9cBvCwNePaxyDeEyoZWkbGYAmfYSwF8P7kzqc4Z 5KqSkX2uY/IeZlibDpi+sci52/mAsAa7yW04w1Si5LTqOZ+5ma+4baeSzk57gqLquMrp olrZVIjPq8o4sv6+1jXWBAE12r51SscxpyEw5XsV8j2raKm+wuwUlC339NnMdrBLDs/G qo8b4qOHMnaxMxpVw9nQ0o5YInie7ewgKeKPdSrNsJ+CViKxaylXf1RflE2lg4rXjKdR 5OAkUkWagwczwPd/W79QozumUZUXp4oFkA5QP/rQHQn7mXmzn0ZvAPpC1pRE/ZlpW1YS /EYQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=I7CsPmj2OJIq2T36SSOstQT2Mm2fo6Uf2IT0BZ0VMUM=; b=aLOb+x6MvXNme9QvqNqfPP9Hexzgx9w57wNwkDJ4pczjcK0WPWfJEoQ/RHeA6gdcfP EdvAZgZaEm4EVpQV9VQRqmDz0I7i7LAtonbGWGr828zSuVGKW3BSMvD4SPcSN0SXKBJm /rdqD1wq7wRGsJK/8tHfS8/vXXa+e5wJDA94e/OqJDSmVwDrvmvLS2tRORqZ+f9W8tyk VaHBd5hViM7MgY3T0cvKUumWon4b0yVwu3ZEcgb+Z/+U87UEQiycyCyGi3Q7eQJOc8QJ BQtFotMY6HQV9Ls1L8xddajoXt96vRZ3Jdz0KLvlpkjii5DZmOh2maOp9Mi9IcAStHYp pTAw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of devicetree-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id w17si9332878edr.34.2021.01.19.10.45.56; Tue, 19 Jan 2021 10:45:56 -0800 (PST) Received-SPF: pass (google.com: domain of devicetree-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of devicetree-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=devicetree-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728107AbhASSns (ORCPT + 6 others); Tue, 19 Jan 2021 13:43:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40046 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391806AbhASRw4 (ORCPT ); Tue, 19 Jan 2021 12:52:56 -0500 Received: from m-r2.th.seeweb.it (m-r2.th.seeweb.it [IPv6:2001:4b7a:2000:18::171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFAEDC061786 for ; Tue, 19 Jan 2021 09:47:26 -0800 (PST) Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id 937C93F20C; Tue, 19 Jan 2021 18:45:59 +0100 (CET) From: AngeloGioacchino Del Regno To: viresh.kumar@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, rjw@rjwysocki.net, devicetree@vger.kernel.org, robh+dt@kernel.org, amit.kucheria@linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, jeffrey.l.hugo@gmail.com, AngeloGioacchino Del Regno , Manivannan Sadhasivam Subject: [PATCH v4 3/7] dt-bindings: arm: cpus: Document 'qcom, freq-domain' property Date: Tue, 19 Jan 2021 18:45:53 +0100 Message-Id: <20210119174557.227318-4-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> References: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Manivannan Sadhasivam Add devicetree documentation for 'qcom,freq-domain' property specific to Qualcomm CPUs. This property is used to reference the CPUFREQ node along with Domain ID (0/1). Signed-off-by: Manivannan Sadhasivam Signed-off-by: AngeloGioacchino Del Regno --- Documentation/devicetree/bindings/arm/cpus.yaml | 6 ++++++ 1 file changed, 6 insertions(+) -- 2.30.0 diff --git a/Documentation/devicetree/bindings/arm/cpus.yaml b/Documentation/devicetree/bindings/arm/cpus.yaml index 14cd727d3c4b..1d60975df23a 100644 --- a/Documentation/devicetree/bindings/arm/cpus.yaml +++ b/Documentation/devicetree/bindings/arm/cpus.yaml @@ -290,6 +290,12 @@ properties: * arm/msm/qcom,kpss-acc.txt + qcom,freq-domain: + $ref: '/schemas/types.yaml#/definitions/phandle-array' + description: | + CPUs supporting freq-domain must set their "qcom,freq-domain" property + with phandle to a cpufreq_hw node followed by the Domain ID(0/1). + rockchip,pmu: $ref: '/schemas/types.yaml#/definitions/phandle' description: | From patchwork Tue Jan 19 17:45:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 366305 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41A10C43333 for ; Tue, 19 Jan 2021 21:27:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1BA2323110 for ; Tue, 19 Jan 2021 21:27:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728277AbhASSoV (ORCPT ); Tue, 19 Jan 2021 13:44:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392087AbhASRzg (ORCPT ); Tue, 19 Jan 2021 12:55:36 -0500 Received: from relay05.th.seeweb.it (relay05.th.seeweb.it [IPv6:2001:4b7a:2000:18::166]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08653C06179F; Tue, 19 Jan 2021 09:48:59 -0800 (PST) Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id DD2423F20F; Tue, 19 Jan 2021 18:45:59 +0100 (CET) From: AngeloGioacchino Del Regno To: viresh.kumar@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, rjw@rjwysocki.net, devicetree@vger.kernel.org, robh+dt@kernel.org, amit.kucheria@linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, jeffrey.l.hugo@gmail.com, AngeloGioacchino Del Regno , Manivannan Sadhasivam Subject: [PATCH v4 4/7] dt-bindings: cpufreq: cpufreq-qcom-hw: Convert to YAML bindings Date: Tue, 19 Jan 2021 18:45:54 +0100 Message-Id: <20210119174557.227318-5-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> References: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Manivannan Sadhasivam Convert Qualcomm cpufreq devicetree binding to YAML. Signed-off-by: Manivannan Sadhasivam Signed-off-by: AngeloGioacchino Del Regno --- .../bindings/cpufreq/cpufreq-qcom-hw.txt | 172 --------------- .../bindings/cpufreq/cpufreq-qcom-hw.yaml | 204 ++++++++++++++++++ 2 files changed, 204 insertions(+), 172 deletions(-) delete mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt deleted file mode 100644 index 9299028ee712..000000000000 --- a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt +++ /dev/null @@ -1,172 +0,0 @@ -Qualcomm Technologies, Inc. CPUFREQ Bindings - -CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI) -SoCs to manage frequency in hardware. It is capable of controlling frequency -for multiple clusters. - -Properties: -- compatible - Usage: required - Value type: - Definition: must be "qcom,cpufreq-hw" or "qcom,cpufreq-epss". - -- clocks - Usage: required - Value type: From common clock binding. - Definition: clock handle for XO clock and GPLL0 clock. - -- clock-names - Usage: required - Value type: From common clock binding. - Definition: must be "xo", "alternate". - -- reg - Usage: required - Value type: - Definition: Addresses and sizes for the memory of the HW bases in - each frequency domain. -- reg-names - Usage: Optional - Value type: - Definition: Frequency domain name i.e. - "freq-domain0", "freq-domain1". - -- #freq-domain-cells: - Usage: required. - Definition: Number of cells in a freqency domain specifier. - -* Property qcom,freq-domain -Devices supporting freq-domain must set their "qcom,freq-domain" property with -phandle to a cpufreq_hw followed by the Domain ID(0/1) in the CPU DT node. - - -Example: - -Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster switch -DCVS state together. - -/ { - cpus { - #address-cells = <2>; - #size-cells = <0>; - - CPU0: cpu@0 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x0>; - enable-method = "psci"; - next-level-cache = <&L2_0>; - qcom,freq-domain = <&cpufreq_hw 0>; - L2_0: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - L3_0: l3-cache { - compatible = "cache"; - }; - }; - }; - - CPU1: cpu@100 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x100>; - enable-method = "psci"; - next-level-cache = <&L2_100>; - qcom,freq-domain = <&cpufreq_hw 0>; - L2_100: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - }; - }; - - CPU2: cpu@200 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x200>; - enable-method = "psci"; - next-level-cache = <&L2_200>; - qcom,freq-domain = <&cpufreq_hw 0>; - L2_200: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - }; - }; - - CPU3: cpu@300 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x300>; - enable-method = "psci"; - next-level-cache = <&L2_300>; - qcom,freq-domain = <&cpufreq_hw 0>; - L2_300: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - }; - }; - - CPU4: cpu@400 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x400>; - enable-method = "psci"; - next-level-cache = <&L2_400>; - qcom,freq-domain = <&cpufreq_hw 1>; - L2_400: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - }; - }; - - CPU5: cpu@500 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x500>; - enable-method = "psci"; - next-level-cache = <&L2_500>; - qcom,freq-domain = <&cpufreq_hw 1>; - L2_500: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - }; - }; - - CPU6: cpu@600 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x600>; - enable-method = "psci"; - next-level-cache = <&L2_600>; - qcom,freq-domain = <&cpufreq_hw 1>; - L2_600: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - }; - }; - - CPU7: cpu@700 { - device_type = "cpu"; - compatible = "qcom,kryo385"; - reg = <0x0 0x700>; - enable-method = "psci"; - next-level-cache = <&L2_700>; - qcom,freq-domain = <&cpufreq_hw 1>; - L2_700: l2-cache { - compatible = "cache"; - next-level-cache = <&L3_0>; - }; - }; - }; - - soc { - cpufreq_hw: cpufreq@17d43000 { - compatible = "qcom,cpufreq-hw"; - reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>; - reg-names = "freq-domain0", "freq-domain1"; - - clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>; - clock-names = "xo", "alternate"; - - #freq-domain-cells = <1>; - }; -} diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml new file mode 100644 index 000000000000..bc81b6203e27 --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml @@ -0,0 +1,204 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/cpufreq/cpufreq-qcom-hw.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm Technologies, Inc. CPUFREQ + +maintainers: + - Manivannan Sadhasivam + +description: | + + CPUFREQ HW is a hardware engine used by some Qualcomm Technologies, Inc. (QTI) + SoCs to manage frequency in hardware. It is capable of controlling frequency + for multiple clusters. + +properties: + compatible: + oneOf: + - description: v1 of CPUFREQ HW + items: + - const: qcom,cpufreq-hw + + - description: v2 of CPUFREQ HW (EPSS) + items: + - enum: + - qcom,sm8250-cpufreq-epss + - const: qcom,cpufreq-epss + + reg: + minItems: 2 + maxItems: 3 + items: + - description: Frequency domain 0 register region + - description: Frequency domain 1 register region + - description: Frequency domain 2 register region + + reg-names: + minItems: 2 + maxItems: 3 + items: + - const: freq-domain0 + - const: freq-domain1 + - const: freq-domain2 + + clocks: + items: + - description: XO Clock + - description: GPLL0 Clock + + clock-names: + items: + - const: xo + - const: alternate + + '#freq-domain-cells': + const: 1 + +required: + - compatible + - reg + - reg-names + - clocks + - clock-names + - '#freq-domain-cells' + +additionalProperties: false + +examples: + - | + #include + #include + + // Example 1: Dual-cluster, Quad-core per cluster. CPUs within a cluster + // switch DCVS state together. + cpus { + #address-cells = <2>; + #size-cells = <0>; + + CPU0: cpu@0 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x0>; + enable-method = "psci"; + next-level-cache = <&L2_0>; + qcom,freq-domain = <&cpufreq_hw 0>; + L2_0: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + L3_0: l3-cache { + compatible = "cache"; + }; + }; + }; + + CPU1: cpu@100 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x100>; + enable-method = "psci"; + next-level-cache = <&L2_100>; + qcom,freq-domain = <&cpufreq_hw 0>; + L2_100: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + }; + }; + + CPU2: cpu@200 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x200>; + enable-method = "psci"; + next-level-cache = <&L2_200>; + qcom,freq-domain = <&cpufreq_hw 0>; + L2_200: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + }; + }; + + CPU3: cpu@300 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x300>; + enable-method = "psci"; + next-level-cache = <&L2_300>; + qcom,freq-domain = <&cpufreq_hw 0>; + L2_300: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + }; + }; + + CPU4: cpu@400 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x400>; + enable-method = "psci"; + next-level-cache = <&L2_400>; + qcom,freq-domain = <&cpufreq_hw 1>; + L2_400: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + }; + }; + + CPU5: cpu@500 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x500>; + enable-method = "psci"; + next-level-cache = <&L2_500>; + qcom,freq-domain = <&cpufreq_hw 1>; + L2_500: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + }; + }; + + CPU6: cpu@600 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x600>; + enable-method = "psci"; + next-level-cache = <&L2_600>; + qcom,freq-domain = <&cpufreq_hw 1>; + L2_600: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + }; + }; + + CPU7: cpu@700 { + device_type = "cpu"; + compatible = "qcom,kryo385"; + reg = <0x0 0x700>; + enable-method = "psci"; + next-level-cache = <&L2_700>; + qcom,freq-domain = <&cpufreq_hw 1>; + L2_700: l2-cache { + compatible = "cache"; + next-level-cache = <&L3_0>; + }; + }; + }; + + soc { + #address-cells = <1>; + #size-cells = <1>; + + cpufreq@17d43000 { + compatible = "qcom,cpufreq-hw"; + reg = <0x17d43000 0x1400>, <0x17d45800 0x1400>; + reg-names = "freq-domain0", "freq-domain1"; + + clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GPLL0>; + clock-names = "xo", "alternate"; + + #freq-domain-cells = <1>; + }; + }; +... From patchwork Tue Jan 19 17:45:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 367296 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2DB9C433DB for ; Tue, 19 Jan 2021 21:37:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 331A423104 for ; Tue, 19 Jan 2021 21:37:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728729AbhASVhB (ORCPT ); Tue, 19 Jan 2021 16:37:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391752AbhASRwY (ORCPT ); Tue, 19 Jan 2021 12:52:24 -0500 Received: from m-r2.th.seeweb.it (m-r2.th.seeweb.it [IPv6:2001:4b7a:2000:18::171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7723DC061379 for ; Tue, 19 Jan 2021 09:47:28 -0800 (PST) Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id 3405D3F1EB; Tue, 19 Jan 2021 18:46:00 +0100 (CET) From: AngeloGioacchino Del Regno To: viresh.kumar@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, rjw@rjwysocki.net, devicetree@vger.kernel.org, robh+dt@kernel.org, amit.kucheria@linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, jeffrey.l.hugo@gmail.com, AngeloGioacchino Del Regno Subject: [PATCH v4 5/7] cpufreq: qcom-hw: Implement CPRh aware OSM programming Date: Tue, 19 Jan 2021 18:45:55 +0100 Message-Id: <20210119174557.227318-6-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> References: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On new SoCs (SDM845 onwards) the Operating State Manager (OSM) is being programmed in the bootloader and write-protected by the hypervisor, leaving to the OS read-only access to some of its registers (in order to read the Lookup Tables and also some status registers) and write access to the p-state register, for for the OS to request a specific performance state to trigger a DVFS switch on the CPU through the OSM hardware. On old SoCs though (MSM8998, SDM630/660 and variants), the bootloader will *not* initialize the OSM (and the CPRh, as it is a requirement for it) before booting the OS, making any request to trigger a performance state change ineffective, as the hardware doesn't have any Lookup Table, nor is storing any parameter to trigger a DVFS switch. In this case, basically all of the OSM registers are *not* write protected for the OS, even though some are - but write access is granted through SCM calls. This commit introduces support for OSM programming, which has to be done on these old SoCs that were distributed (almost?) always with a bootloader that does not do any CPRh nor OSM init before booting the kernel. In order to program the OSM on these SoCs, it is necessary to fullfill a "special" requirement: the Core Power Reduction Hardened (CPRh) hardware block must be initialized, as the OSM is "talking" to it in order to perform the Voltage part of DVFS; here, we are calling initialization of this through Linux generic power domains, specifically by requesting a genpd attach from the qcom-cpufreq-hw driver, which will give back voltages associated to each CPU frequency that has been declared in the OPPs, scaled and interpolated with the previous one, and will also give us parameters for the Array Power Mux (APM) and mem-acc, in order for this driver to be then able to generate the Lookup Tables that will be finally programmed to the OSM hardware. After writing the parameters to the OSM and enabling it, all the programming work will never happen anymore until a OS reboot, so all of the allocations and "the rest" will be disposed-of: this is done mainly to leave the code that was referred only to the new SoCs intact, as to also emphasize on the fact that the OSM HW is, in the end, the exact same; apart some register offsets that are slightly different, the entire logic is the same. This also adds the parameters to support CPU scaling on SDM630 and MSM8998. Signed-off-by: AngeloGioacchino Del Regno --- drivers/cpufreq/qcom-cpufreq-hw.c | 1240 ++++++++++++++++++++++++++++- 1 file changed, 1208 insertions(+), 32 deletions(-) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index acc645b85e79..a92959bb7b50 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -1,33 +1,256 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2018, The Linux Foundation. All rights reserved. + * + * OSM hardware initial programming + * Copyright (C) 2020, AngeloGioacchino Del Regno + * */ #include #include +#include #include #include #include #include #include #include +#include #include #include +#include #define LUT_MAX_ENTRIES 40U -#define LUT_SRC GENMASK(31, 30) +#define LUT_SRC_845 GENMASK(31, 30) +#define LUT_SRC_8998 GENMASK(27, 26) +#define LUT_PLL_DIV GENMASK(25, 24) #define LUT_L_VAL GENMASK(7, 0) #define LUT_CORE_COUNT GENMASK(18, 16) +#define LUT_VOLT_VC GENMASK(21, 16) #define LUT_VOLT GENMASK(11, 0) -#define CLK_HW_DIV 2 #define LUT_TURBO_IND 1 +#define OSM_BOOT_TIME_US 5 + +#define CYCLE_COUNTER_CLK_RATIO GENMASK(5, 1) +#define OSM_XO_RATIO_VAL (10 - 1) +#define CYCLE_COUNTER_USE_XO_EDGE BIT(8) + +/* FSM Boost Control */ +#define CC_BOOST_EN BIT(0) +#define PS_BOOST_EN BIT(1) +#define DCVS_BOOST_EN BIT(2) +#define BOOST_TIMER_REG_HI GENMASK(31, 16) +#define BOOST_TIMER_REG_LO GENMASK(15, 0) + +#define PLL_WAIT_LOCK_TIME_NS 2000 +#define SAFE_FREQ_WAIT_NS 1000 +#define DEXT_DECREMENT_WAIT_NS 200 + +#define BOOST_SYNC_DELAY 5 + +#define HYSTERESIS_UP_MASK GENMASK(31, 16) +#define HYSTERESIS_DN_MASK GENMASK(15, 0) +#define HYSTERESIS_CC_NS 200 +#define HYSTERESIS_LLM_NS 65535 + +/* FSM Droop Control */ +#define PC_RET_EXIT_DROOP_EN BIT(3) +#define WFX_DROOP_EN BIT(4) +#define DCVS_DROOP_EN BIT(5) +#define DROOP_TIMER1 GENMASK(31, 16) +#define DROOP_TIMER0 GENMASK(15, 0) +#define DROOP_CTRL_VAL (BIT(3) | BIT(17) | BIT(31)) +#define DROOP_TIMER_NS 100 +#define DROOP_WAIT_RELEASE_TIMER_NS 50 +#define DROOP_RELEASE_TIMER_NS 1 + +/* PLL Override Control */ +#define PLL_OVERRIDE_DROOP_EN BIT(0) + +/* Sequencer */ +#define SEQUENCER_REG(base, n) (base + (n * 4)) +#define SEQ_APM_THRESH_VC 15 +#define SEQ_APM_THRESH_PREVC 31 +#define SEQ_MEM_ACC_LVAL 32 +#define SEQ_MEM_ACC_0 55 +#define SEQ_APM_CROSSOVER_VC 72 +#define SEQ_APM_PARAM 76 +#define SEQ_MEM_ACC_CROSSOVER_VC 88 +#define SEQ_MEM_ACC_MAX_LEVELS 4 +#define SEQ_MEMACC_REG(base, n) SEQUENCER_REG(base, SEQ_MEM_ACC_0 + n) + +/* ACD */ +#define ACD_WRITE_CTL_UPDATE_EN BIT(0) +#define ACD_WRITE_CTL_SELECT_SHIFT 1 + +/** + * struct qcom_cpufreq_soc_setup_data - Register offsets for OSM setup + * + * @reg_osm_sequencer: OSM Sequencer (used to get physical address) + * @reg_override: Override parameters + * @reg_spare: Spare parameters (MEMACC-to-VC) + * @reg_cc_zero_behav: Virtual Corner for cluster power collapse + * @reg_spm_cc_hyst: DCVS-CC Wait time for frequency inc/decrement + * @reg_spm_cc_dcvs_dis: DCVS-CC en/disable control + * @reg_spm_core_ret_map: Treat cores in retention as active/inactive + * @reg_llm_freq_vote_hyst: DCVS-LLM Wait time for frequency inc/decrement + * @reg_llm_volt_vote_hyst: DCVS-LLM Wait time for voltage inc/decrement + * @reg_llm_intf_dcvs_dis: DCVS-LLM en/disable control + * @reg_seq1: Sequencer extra register + * @reg_pdn_fsm_ctrl: Boost and Droop FSMs en/disable control + * @reg_cc_boost_timer: CC-Boost FSM wait first timer register + * @reg_dcvs_boost_timer: DCVS-Boost FSM wait first timer register + * @reg_ps_boost_timer: PS-Boost FSM wait first timer register + * @boost_timer_reg_len: Length of boost timer registers + * @reg_boost_sync_delay: PLL signal timing control for Boost + * @reg_droop_ctrl: Droop control value + * @reg_droop_release_ctrl: Wait for Droop release + * @reg_droop_unstall_ctrl: Wait for Droop unstall + * @reg_droop_wait_release_ctrl: Time to wait for state release + * @reg_droop_timer_ctrl: Droop timer + * @reg_droop_sync_delay: PLL signal timing control for Droop + * @reg_pll_override: PLL Droop Override en/disable control + * @reg_cycle_counter: OSM CPU cycle counter + * + * This structure holds the register offsets that are used to set-up + * the Operating State Manager (OSM) parameters, when it is not (or + * not entirely) configured from the bootloader and TrustZone. + * + * Acronyms used in this documentation: + * CC = Core Count + * PS = Power-Save + * VC = Virtual Corner + * LLM = Limits Load Management + * DCVS = Dynamic Clock and Voltage Scaling + */ +struct qcom_cpufreq_soc_setup_data { + /* OSM phys register offsets */ + u16 reg_osm_sequencer; + + /* Frequency domain register offsets */ + u16 reg_override; + u16 reg_spare; + u16 reg_cc_zero_behav; + u16 reg_spm_cc_hyst; + u16 reg_spm_cc_dcvs_dis; + u16 reg_spm_core_ret_map; + u16 reg_llm_freq_vote_hyst; + u16 reg_llm_volt_vote_hyst; + u16 reg_llm_intf_dcvs_dis; + u16 reg_seq1; + u16 reg_pdn_fsm_ctrl; + u16 reg_cc_boost_timer; + u16 reg_dcvs_boost_timer; + u16 reg_ps_boost_timer; + u16 boost_timer_reg_len; + u16 reg_boost_sync_delay; + u16 reg_droop_ctrl; + u16 reg_droop_release_ctrl; + u16 reg_droop_unstall_ctrl; + u16 reg_droop_wait_release_ctrl; + u16 reg_droop_timer_ctrl; + u16 reg_droop_sync_delay; + u16 reg_pll_override; + u16 reg_cycle_counter; +}; + +/** + * struct qcom_cpufreq_soc_acd_data - Adaptive Clock Distribution data + * + * @tl_delay_reg: Tunable-Length Delay (TLD) register offset + * @acd_ctrl_reg: Control Register (CR) register offset + * @softstart_reg: Soft Start Control Register (SSCR) register offset + * @ext_intf_reg: External interface configuration register offset + * @auto_xfer_reg: Auto Register-Transfer register offset + * @auto_xfer_cfg_reg: Auto Register-Transfer Configuration reg offset + * @auto_xfer_ctl_reg: Auto Register-Transfer Control register offset + * @auto_xfer_sts_reg: Auto Register-Transfer Status register offset + * @dcvs_sw_reg: Software DCVS register offset + * @gfmux_cfg_reg: Glitch-Free MUX configuration register offset + * @write_ctl_reg: Write Control register + * @write_sts_reg: Write Status register + * @tl_delay_val: Tunable-Length Delay (TLD) value + * @acd_ctrl_val: Control Register (CR) value + * @softstart_val: Soft Start Control Register (SSCR) value + * @ext_intf0_val: Initial external interface configuration value + * @ext_intf1_val: Final external interface configuration value + * @auto_xfer_val: Auto-register Transfer Control value + * + * This structure holds the register offsets (from the ACD iospace base) + * and the parameters that are required to configure the OSM to + * initialize the Adaptive Clock Distribution (ACD) system. + */ +struct qcom_cpufreq_soc_acd_data { + u8 tl_delay_reg; + u8 acd_ctrl_reg; + u8 softstart_reg; + u8 ext_intf_reg; + u8 auto_xfer_reg; + u8 auto_xfer_cfg_reg; + u8 auto_xfer_ctl_reg; + u8 auto_xfer_sts_reg; + u8 dcvs_sw_reg; + u8 gfmux_cfg_reg; + u8 write_ctl_reg; + u8 write_sts_reg; + u32 tl_delay_val; + u32 acd_ctrl_val; + u32 softstart_val; + u32 ext_intf0_val; + u32 ext_intf1_val; + u32 auto_xfer_val; +}; + +/** + * struct qcom_cpufreq_hw_params - Operating State Manager (OSM) Parameters + * + * @volt_lut_val: Value composed of: virtual corner (vc) and voltage in mV. + * @freq_lut_val: Value composed of: core count, clock source and output + * frequency in MHz. + * @override_val: PLL parameters that the OSM uses to override the previous + * setting coming from the bootloader, or when uninitialized. + * @spare_val: Spare register, used by both this driver and the OSM HW + * to identify MEM-ACC levels in relation to virtual corners. + * @acc_thresh: MEM-ACC threshold level + * + * This structure holds the parameters to write to the OSM registers for + * one "Virtual Corner" (VC), or one Performance State (p-state). + */ +struct qcom_cpufreq_hw_params { + u32 volt_lut_val; + u32 freq_lut_val; + u32 override_val; + u32 spare_val; + u32 acc_thresh; +}; +/** + * struct qcom_cpufreq_soc_data - SoC specific register offsets of the OSM + * + * @reg_enable: OSM enable status + * @reg_index: Index of the Virtual Corner + * @reg_freq_lut: Frequency Lookup Table + * @reg_freq_lut_src_mask: Frequency Lookup Table clock-source mask + * @reg_volt_lut: Voltage Lookup Table + * @reg_perf_state: Performance State request register + * @lut_row_size: Lookup Table row size + * @clk_hw_div: Divider for "alternate" OSM clock-source + * @uses_tz: OSM already set-up and protected by TrustZone + * @setup_regs: Register offsets for OSM setup + */ struct qcom_cpufreq_soc_data { u32 reg_enable; + u32 reg_index; u32 reg_freq_lut; + u32 reg_freq_lut_src_mask; u32 reg_volt_lut; u32 reg_perf_state; - u8 lut_row_size; + u8 lut_row_size; + u8 clk_hw_div; + bool uses_tz; + const struct qcom_cpufreq_soc_setup_data setup_regs; + const struct qcom_cpufreq_soc_acd_data acd_data; }; struct qcom_cpufreq_data { @@ -35,9 +258,17 @@ struct qcom_cpufreq_data { const struct qcom_cpufreq_soc_data *soc_data; }; -static unsigned long cpu_hw_rate, xo_rate; +static const char *cprh_genpd_names[] = { "cprh", NULL }; +static u64 cpu_hw_rate, xo_rate; static bool icc_scaling_enabled; +/** + * qcom_cpufreq_set_bw - Set interconnect bandwidth + * @policy: CPUFreq policy structure + * @freq_khz: CPU Frequency in KHz + * + * Returns: Zero for success, otherwise negative value on errors + */ static int qcom_cpufreq_set_bw(struct cpufreq_policy *policy, unsigned long freq_khz) { @@ -59,6 +290,20 @@ static int qcom_cpufreq_set_bw(struct cpufreq_policy *policy, return ret; } +/** + * qcom_cpufreq_update_opp - Update CPU OPP tables + * @policy: CPUFreq policy structure + * @freq_khz: CPU Frequency for OPP entry in KHz + * @volt: CPU Voltage for OPP entry in microvolts + * + * The CPU frequencies and voltages are being read from the Operating + * State Manager (OSM) and the related OPPs, read from DT, need to be + * updated to reflect what the hardware will set for each p-state. + * If there is no OPP table specified in DT, then this function will + * add dynamic ones. + * + * Returns: Zero for success, otherwise negative value on errors + */ static int qcom_cpufreq_update_opp(struct device *cpu_dev, unsigned long freq_khz, unsigned long volt) @@ -79,6 +324,17 @@ static int qcom_cpufreq_update_opp(struct device *cpu_dev, return dev_pm_opp_enable(cpu_dev, freq_hz); } +/** + * qcom_cpufreq_hw_target_index - Set frequency/voltage + * @policy: CPUFreq policy structure + * @index: Performance state index to be set + * + * This function sends a request to the Operating State Manager + * to set a Performance State index, so, to set frequency and + * voltage for the target CPU/cluster. + * + * Returns: Always zero + */ static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy, unsigned int index) { @@ -94,6 +350,12 @@ static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy, return 0; } +/** + * qcom_cpufreq_hw_get - Get current Performance State from OSM + * @cpu: CPU number + * + * Returns: Current CPU/Cluster frequency or zero + */ static unsigned int qcom_cpufreq_hw_get(unsigned int cpu) { struct qcom_cpufreq_data *data; @@ -127,6 +389,644 @@ static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy, return policy->freq_table[index].frequency; } +static void qcom_cpufreq_hw_boost_setup(void __iomem *timer0_addr, u32 len) +{ + u32 val; + + /* timer_reg0 */ + val = FIELD_PREP(BOOST_TIMER_REG_LO, PLL_WAIT_LOCK_TIME_NS); + val |= FIELD_PREP(BOOST_TIMER_REG_HI, SAFE_FREQ_WAIT_NS); + writel_relaxed(val, timer0_addr); + + /* timer_reg1 */ + val = FIELD_PREP(BOOST_TIMER_REG_LO, PLL_WAIT_LOCK_TIME_NS); + val |= FIELD_PREP(BOOST_TIMER_REG_HI, PLL_WAIT_LOCK_TIME_NS); + writel_relaxed(val, timer0_addr + len); + + /* timer_reg2 */ + val = FIELD_PREP(BOOST_TIMER_REG_LO, DEXT_DECREMENT_WAIT_NS); + writel_relaxed(val, timer0_addr + (2 * len)); +} + +/* + * qcom_cpufreq_gen_params - Generate parameters to send to the hardware + * @cpu_dev: CPU device + * @data: SoC specific register offsets + * @hw_tbl: Pointer to return the array of parameters + * @apm_vc: APM Virtual Corner crossover number, returned to the caller + * @acc_vc: MEMACC Virtual Corner crossover number, returned to the caller + * @cpu_count: Number of CPUs in the frequency domain + * + * This function allocates a 'qcom_cpufreq_hw_params' parameters table, + * fills it and returns it to the consumer, ready to get sent to the HW. + * Since the APM threshold is just one + * Freeing the table after usage is left to the caller. + * + * Returns: Number of allocated (and filled) elements in the table, + * otherwise negative value on errors. + */ +static int qcom_cpufreq_gen_params(struct device *cpu_dev, + struct qcom_cpufreq_data *data, + struct qcom_cpufreq_hw_params **hw_tbl, + int *apm_vc, int *acc_vc, int cpu_count) +{ + struct platform_device *pdev = cpufreq_get_driver_data(); + const struct qcom_cpufreq_soc_data *soc_data = data->soc_data; + struct device **opp_virt_dev; + struct opp_table *genpd_opp_table; + struct dev_pm_opp *apm_opp, *acc_opp; + unsigned long apm_uV, acc_uV, rate; + int i, gpd_opp_cnt, ret; + u8 last_acc_corner = 0, prev_spare = 0; + + /* + * Install the OPP table that we get from DT here already, + * otherwise it gets really messy as we'd have to manually walk + * through the entire OPP DT, manually find frequencies and + * also manually exclude supported-hw (for speed-binning). + * This also makes it easier for the genpd to add info in it. + */ + ret = dev_pm_opp_of_add_table(cpu_dev); + if (ret) { + dev_err(&pdev->dev, "Cannot install CPU OPP table: %d\n", ret); + return ret; + } + + /* Get a handle to the genpd virtual device */ + genpd_opp_table = dev_pm_opp_attach_genpd(cpu_dev, cprh_genpd_names, + &opp_virt_dev); + if (IS_ERR(genpd_opp_table)) { + ret = PTR_ERR(genpd_opp_table); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, + "Could not attach to pm_domain: %d\n", ret); + goto opp_dispose; + } + + /* Get the count of available OPPs coming from the power domain */ + gpd_opp_cnt = dev_pm_opp_get_opp_count(cpu_dev); + if (gpd_opp_cnt < 2) { + ret = gpd_opp_cnt > 0 ? -EINVAL : gpd_opp_cnt; + goto detach_gpd; + } + + /* Find the APM threshold disabled OPP and "annotate" the voltage */ + apm_opp = dev_pm_opp_find_freq_exact(cpu_dev, 0, false); + if (IS_ERR(apm_opp)) { + ret = -EINVAL; + goto detach_gpd; + } + + /* If we get no APM voltage, the system is going to be unstable */ + apm_uV = dev_pm_opp_get_voltage(apm_opp); + if (apm_uV == 0) { + ret = -EINVAL; + goto detach_gpd; + } + *apm_vc = -1; + + /* + * Find the ACC threshold disabled OPP and "annotate" the voltage: + * this is optional, as not every SoC needs it. + */ + acc_opp = dev_pm_opp_find_freq_exact(cpu_dev, 1, false); + if (IS_ERR(acc_opp)) { + acc_uV = ULONG_MAX; + *acc_vc = U8_MAX; + } else { + /* + * If the ACC OPP is present, this means that we *have* to + * set the relative corner on the OSM: if we cannot get the + * voltage at that point, the CPU will inevitably freeze. + */ + acc_uV = dev_pm_opp_get_voltage(acc_opp); + if (acc_uV == 0) { + ret = -EINVAL; + goto detach_gpd; + } + *acc_vc = -1; + } + + *hw_tbl = devm_kmalloc_array(&pdev->dev, gpd_opp_cnt, + sizeof(**hw_tbl), GFP_KERNEL); + if (!hw_tbl) { + ret = -ENOMEM; + goto detach_gpd; + } + + for (i = 0, rate = 0; ; rate++, i++) { + struct qcom_cpufreq_hw_params *entry = *hw_tbl + i; + struct dev_pm_opp *genpd_opp; + struct device_node *np; + u32 pll_div, millivolts, f_src; + + /* Find the next enabled OPP's frequency (ignores APM/ACC) */ + genpd_opp = dev_pm_opp_find_freq_ceil(cpu_dev, &rate); + if (IS_ERR(genpd_opp)) + break; + + /* Get mandatory and optional properties from the OPP DT */ + np = dev_pm_opp_get_of_node(genpd_opp); + if (!np) + break; + + if (of_property_read_u32(np, "qcom,pll-override", + &entry->override_val)) { + of_node_put(np); + return -EINVAL; + } + + if (of_property_read_u32(np, "qcom,spare-data", + &entry->spare_val)) + entry->spare_val = 0; + + if (of_property_read_u32(np, "qcom,pll-div", &pll_div)) + pll_div = 0; + + of_node_put(np); + + /* Get voltage in microvolts, then convert to millivolts */ + millivolts = dev_pm_opp_get_voltage(genpd_opp); + if (millivolts >= apm_uV && *apm_vc < 0) + *apm_vc = i; + if (millivolts >= acc_uV && *acc_vc < 0) + *acc_vc = i; + + millivolts /= 1000; + + if (millivolts < 150 || millivolts > 1400) { + dev_err(&pdev->dev, + "Read invalid voltage: %u.\n", millivolts); + return -EINVAL; + } + + /* In the OSM firmware, "Virtual Corner" levels start from 0 */ + entry->volt_lut_val = FIELD_PREP(LUT_VOLT_VC, i); + entry->volt_lut_val |= FIELD_PREP(LUT_VOLT, millivolts); + + /* Only the first frequency can have alternate source */ + f_src = i ? 1 : 0; + f_src <<= ffs(soc_data->reg_freq_lut_src_mask) - 1; + entry->freq_lut_val = f_src | div_u64(rate, xo_rate); + entry->freq_lut_val |= FIELD_PREP(LUT_CORE_COUNT, cpu_count); + + /* + * PLL divider is not always 0 and there is no way to determine + * it automatically, as setting this value higher than DIV1 + * will make the OSM HW to effectively set the PLL at 2-4x + * the CPU frequency and then divide the CPU clock by this div, + * so this value is effectively used as both a multiplier and + * divider. + * This value cannot be calculated because it depends on + * manual calibration and is (most probably) used to choose + * a PLL frequency that gives the least possible jitter. + */ + entry->freq_lut_val |= FIELD_PREP(LUT_PLL_DIV, pll_div); + + /* + * MEM-ACC Virtual Corner threshold voltage: set the + * acc_thresh to the "next different" spare_val, otherwise + * set it to an invalid value, so that we can recognize it + * and exclude it later, when this set of data will be used + * for programming the OSM. + */ + if (entry->spare_val != prev_spare) { + prev_spare = entry->spare_val; + entry->acc_thresh = last_acc_corner; + } else { + entry->acc_thresh = SEQ_MEM_ACC_MAX_LEVELS + 1; + } + + dev_dbg(&pdev->dev, + "[%d] freq=0x%x volt=0x%x override=0x%x spare=0x%x\n", + i, entry->freq_lut_val, entry->volt_lut_val, + entry->override_val, entry->spare_val); + dev_pm_opp_put(genpd_opp); + } + + /* + * If we've got a customized mem-acc corner but we couldn't + * find any suitable crossover, or the corner is less than + * the minimum amount of required corners for mem-acc scaling, + * the values are not valid, hence fall back to LUT values. + */ + if (acc_uV != ULONG_MAX && *acc_vc < SEQ_MEM_ACC_MAX_LEVELS - 1) { + dev_dbg(&pdev->dev, + "MEM-ACC corner: invalid values VC%d %luuV\n", + *acc_vc, acc_uV); + *acc_vc = U8_MAX; + } + + /* + * If we have probed less params than what we need, then the + * OPP table that we got from the genpd is malformed for some + * reason: in this case, do not apply the table to the HW. + */ + if (i < gpd_opp_cnt) { + dev_err(&pdev->dev, "Got bad OPP table from power domain.\n"); + ret = -EINVAL; + goto detach_gpd; + } + +detach_gpd: + dev_pm_opp_detach_genpd(genpd_opp_table); +opp_dispose: + /* + * Now that we're totally done with it, dispose of all the dynamic + * OPPs in the table: like this, at the end of the OSM configuration + * we are leaving it like it was magically configured by the TZ or + * by the bootloader and using the rest of the driver as if this + * programming phase has never happened in the OS, like new SoCs. + * This also makes us able to not modify a single bit in the basic + * OSM frequency request logic that was meant for the newest SoCs. + */ + dev_pm_opp_remove_all_dynamic(cpu_dev); + return ret < 0 ? ret : i; +} + +static inline u32 qcom_cpufreq_acd_regbit(u8 acd_reg_offset) +{ + return BIT((acd_reg_offset / 4)); +} + +static int qcom_cpufreq_hw_acd_write_autoxfer(struct qcom_cpufreq_data *data, + void __iomem *acd_base, u32 val) +{ + const struct qcom_cpufreq_soc_data *sdata = data->soc_data; + const struct qcom_cpufreq_soc_acd_data *aregs = &sdata->acd_data; + u32 regval; + int retry = 3; + + writel_relaxed(val, acd_base + aregs->auto_xfer_cfg_reg); + + /* (Clear, then) Set AUTOXFER START */ + writel_relaxed(0, acd_base + aregs->auto_xfer_reg); + writel_relaxed(1, acd_base + aregs->auto_xfer_reg); + + /* Poll for status: if the first bit is set the transfer is done. */ + do { + regval = readl_relaxed(acd_base + aregs->auto_xfer_sts_reg); + if (regval & BIT(0)) + break; + udelay(1); + } while (--retry); + + if (retry <= 0) + return -ETIMEDOUT; + return 0; +} + +static int qcom_cpufreq_hw_acd_write_xfer(struct qcom_cpufreq_data *data, + void __iomem *acd_base, u8 reg, + u32 val) +{ + const struct qcom_cpufreq_soc_data *sdata = data->soc_data; + const struct qcom_cpufreq_soc_acd_data *aregs = &sdata->acd_data; + int retry = 2; + u32 regval; + + /* Write to the register, then initiate manual transfer */ + writel_relaxed(val, acd_base + reg); + + /* + * Make sure that the write goes through, otherwise the local + * transfer process will wrongly copy the old value. + */ + wmb(); + + /* Clear write control register */ + writel_relaxed(0, acd_base + aregs->write_ctl_reg); + + regval = (reg / 4) << ACD_WRITE_CTL_SELECT_SHIFT; + regval |= ACD_WRITE_CTL_UPDATE_EN; + writel_relaxed(regval, acd_base + aregs->write_ctl_reg); + + /* Wait until ACD Local Transfer is done */ + do { + regval = readl_relaxed(acd_base + aregs->write_sts_reg); + if (regval & qcom_cpufreq_acd_regbit(reg)) + break; + udelay(1); + } while (--retry); + + if (retry <= 0) + return -ETIMEDOUT; + return 0; +} + +/** + * qcom_cpufreq_hw_acd_init - Initialize ACD params in the OSM + * @cpu_dev: CPU device + * @policy: CPUFreq policy structure + * @index: Instance number (CPU cluster number) + * + * On some SoCs it is required to send the ACD configuration parameters + * to the OSM. This function takes the parameters from the SoC specific + * configuration and writes them only if a "osm-acdN" iospace has been + * declared (hence, it's present). + * + * Returns: Zero for success, otherwise negative number on error. + */ +static int qcom_cpufreq_hw_acd_init(struct device *cpu_dev, + struct cpufreq_policy *policy, + int index) +{ + struct platform_device *pdev = cpufreq_get_driver_data(); + struct qcom_cpufreq_data *ddata = policy->driver_data; + const struct qcom_cpufreq_soc_data *sdata = ddata->soc_data; + const struct qcom_cpufreq_soc_acd_data *aregs = &sdata->acd_data; + const char *acd_resname; + void __iomem *acd_base; + u32 rmask; + int ret; + + acd_resname = kasprintf(GFP_KERNEL, "osm-acd%d", index); + if (!acd_resname) + return -ENOMEM; + + acd_base = devm_platform_ioremap_resource_byname(pdev, acd_resname); + kfree(acd_resname); + if (IS_ERR(acd_base)) { + dev_vdbg(cpu_dev, "Skipping ACD initialization.\n"); + return 0; + } + + writel_relaxed(aregs->tl_delay_val, acd_base + aregs->tl_delay_reg); + writel_relaxed(aregs->acd_ctrl_val, acd_base + aregs->acd_ctrl_reg); + writel_relaxed(aregs->softstart_val, acd_base + aregs->softstart_reg); + writel_relaxed(aregs->ext_intf0_val, acd_base + aregs->ext_intf_reg); + writel_relaxed(aregs->auto_xfer_val, + acd_base + aregs->auto_xfer_ctl_reg); + /* + * Before initiating register auto transfer, make sure that all + * the writes go through, otherwise bad values will be transferred. + */ + wmb(); + + rmask = qcom_cpufreq_acd_regbit(aregs->acd_ctrl_reg) | + qcom_cpufreq_acd_regbit(aregs->tl_delay_reg) | + qcom_cpufreq_acd_regbit(aregs->softstart_reg) | + qcom_cpufreq_acd_regbit(aregs->ext_intf_reg); + ret = qcom_cpufreq_hw_acd_write_autoxfer(ddata, acd_base, rmask); + if (ret) + return ret; + + /* Switch CPUSS clock source to ACD clock */ + ret = qcom_cpufreq_hw_acd_write_xfer(ddata, acd_base, + aregs->gfmux_cfg_reg, 1); + if (ret) + return ret; + + /* (Set, then) Clear DCVS_SW */ + ret = qcom_cpufreq_hw_acd_write_xfer(ddata, acd_base, + aregs->dcvs_sw_reg, 1); + if (ret) + return ret; + ret = qcom_cpufreq_hw_acd_write_xfer(ddata, acd_base, + aregs->dcvs_sw_reg, 0); + if (ret) + return ret; + + /* Wait for clock switch time */ + udelay(1); + + /* Program the final ACD external interface */ + ret = qcom_cpufreq_hw_acd_write_xfer(ddata, acd_base, + aregs->ext_intf_reg, + aregs->ext_intf1_val); + if (ret) + return ret; + + /* Initiate transfer of the final ACD value */ + rmask |= qcom_cpufreq_acd_regbit(aregs->gfmux_cfg_reg); + writel_relaxed(rmask, acd_base + aregs->auto_xfer_cfg_reg); + + /* Wait for ACD to stabilize. Same wait as the OSM boot time... */ + udelay(OSM_BOOT_TIME_US); + return ret; +} + +/** + * qcom_cpufreq_hw_write_lut - Write Lookup Table params to the OSM + * @cpu_dev: CPU device + * @policy: CPUFreq policy structure + * @cpu_count: Number of CPUs in the frequency domain + * @index: Instance number (CPU cluster number) + * + * Program all the Lookup Table (LUT) entries and related thresholds + * to the Operating State Manager on platforms where the same hasn't + * been done already by the bootloader or TrustZone before booting + * the operating system's kernel; + * On these platforms, write access to the OSM is (obviously) not + * blocked by the hypervisor. + * + * Returns: Zero for success, otherwise negative number on error. + */ +static int qcom_cpufreq_hw_write_lut(struct device *cpu_dev, + struct cpufreq_policy *policy, + int cpu_count, int index) +{ + struct platform_device *pdev = cpufreq_get_driver_data(); + struct qcom_cpufreq_data *ddata = policy->driver_data; + const struct qcom_cpufreq_soc_data *sdata = ddata->soc_data; + const struct qcom_cpufreq_soc_setup_data *sregs = &sdata->setup_regs; + struct qcom_cpufreq_hw_params *hw_tbl; + struct resource *osm_rsrc; + const char *osm_resname; + u32 sreg, seq_addr, acc_lval = 0, last_spare = 1; + int apm_vc = INT_MAX, acc_vc = U8_MAX, acc_idx = 0; + int acc_val[SEQ_MEM_ACC_MAX_LEVELS]; + int i, ret, num_entries; + + osm_resname = kasprintf(GFP_KERNEL, "osm-domain%d", index); + if (!osm_resname) + return -ENOMEM; + + /* + * On some SoCs the OSM is not getting programmed from bootloader + * and needs to be done here: in this case, we need to retrieve + * the base physical address for the "Sequencer", so we will get + * the OSM base phys and apply the sequencer offset. + * + * Note: We are not remapping this iospace because we are really + * sending the physical address through SCM calls later. + */ + osm_rsrc = platform_get_resource_byname(pdev, IORESOURCE_MEM, + osm_resname); + kfree(osm_resname); + + if (!osm_rsrc) + return -ENODEV; + + seq_addr = osm_rsrc->start + sregs->reg_osm_sequencer; + + num_entries = qcom_cpufreq_gen_params(cpu_dev, ddata, &hw_tbl, + &apm_vc, &acc_vc, cpu_count); + if (num_entries < 0) + return num_entries; + + for (i = 0; i < LUT_MAX_ENTRIES; i++) { + struct qcom_cpufreq_hw_params *entry; + int pos = i * sdata->lut_row_size; + + /* + * If we have reached the end of the params table, write + * the last valid entry until the end of the OSM table. + */ + if (i < num_entries) + entry = &hw_tbl[i]; + else + entry = &hw_tbl[num_entries - 1]; + + writel_relaxed(i, ddata->base + sdata->reg_index + pos); + + writel_relaxed(entry->volt_lut_val, + ddata->base + sdata->reg_volt_lut + pos); + + writel_relaxed(entry->freq_lut_val, + ddata->base + sdata->reg_freq_lut + pos); + + writel_relaxed(entry->override_val, + ddata->base + sregs->reg_override + pos); + + writel_relaxed(entry->spare_val, + ddata->base + sregs->reg_spare + pos); + + dev_dbg(cpu_dev, + "Writing [%d] v:0x%x f:0x%x ovr:0x%x s:0x%x\n", i, + entry->volt_lut_val, entry->freq_lut_val, + entry->override_val, entry->spare_val); + + /* + * MEM-ACC Virtual Corner threshold voltage: this gets set + * as the pairs of corners in which there is a transition + * between one MEM-ACC level and the next one. + * + * Notes: The spare_val can never be zero; + * The first spare_val is always 1; + * The maximum number of pairs is two (four registers). + * + * Example: (C = Corner Level - M = MEM-ACC Level) + * C0 M1 - C1 M1 - C2 M2 - C3 M2 - C4 M2 - C5 M3 + * Pairs: 1-2, 4-5 + */ + if (entry->spare_val <= last_spare || + acc_idx >= SEQ_MEM_ACC_MAX_LEVELS - 1) + continue; + + /* Standard mem-acc pairs using spare_val LUT crossovers */ + last_spare = entry->spare_val; + acc_val[acc_idx] = i - 1; + acc_idx++; + acc_val[acc_idx] = i; + acc_idx++; + } + + /* Sanity check: we *must* have two mem-acc crossovers (four values) */ + if (acc_idx < SEQ_MEM_ACC_MAX_LEVELS - 1) + return -EINVAL; + + /* + * Customized mem-acc corners, if any; in this case, the last corner + * in the external (CPRh) LUT is this one, placed after the APM one. + */ + if (acc_vc != U8_MAX) { + sreg = SEQUENCER_REG(seq_addr, SEQ_MEM_ACC_CROSSOVER_VC); + ret = qcom_scm_io_writel(sreg, num_entries + 1); + if (ret) + return ret; + + /* + * At the price of very-slightly higher power consumption, + * switch the ACC at one corner lower than what we've found, + * as this seems to be needed on at least some MSM8998 chips + * to achieve full system stability + */ + acc_vc--; + + /* Change only if we have to move the corner down */ + if (acc_vc < acc_val[3]) { + acc_val[2] = acc_vc - 1; + acc_val[3] = acc_vc; + } + + /* If needed, sanitize previously stored vals from the LUT */ + if (acc_val[2] <= acc_val[1]) + acc_val[1] = acc_val[2] - 1; + if (acc_val[1] <= acc_val[0]) + acc_val[0] = acc_val[1] - 1; + } + + for (i = 0; i < SEQ_MEM_ACC_MAX_LEVELS; i++) { + ret = qcom_scm_io_writel(SEQ_MEMACC_REG(seq_addr, i), + acc_val[i]); + if (ret) + return ret; + } + dev_dbg(cpu_dev, "Wrote MEM-ACC Pairs: [%u-%u] [%u-%u]\n", + acc_val[0], acc_val[1], acc_val[2], acc_val[3]); + + /* + * Program the L_VAL of the first corner requesting MEM-ACC + * voltage level 3 to the right sequencer register + */ + acc_lval = FIELD_GET(LUT_L_VAL, hw_tbl[acc_val[3]].freq_lut_val); + ret = qcom_scm_io_writel(SEQUENCER_REG(seq_addr, SEQ_MEM_ACC_LVAL), + acc_lval); + if (ret) { + dev_dbg(cpu_dev, "Cannot send memacc l_val\n"); + return ret; + } + dev_dbg(cpu_dev, "MEM-ACC L-Val is %u\n", acc_lval); + + /* + * Array Power Mux threshold level: the first virtual corner + * that requires a switch sequence of the APM from MX to APC. + */ + if (apm_vc == INT_MAX) + apm_vc = LUT_MAX_ENTRIES - 1; + + /* + * APM crossover virtual corner refers to CPRh: there, the APM corner + * is always appended to the table (so, at the end of it, right after + * the cluster dvfs entries). + */ + writel(num_entries, ddata->base + sregs->reg_seq1); + ret = qcom_scm_io_writel(SEQUENCER_REG(seq_addr, SEQ_APM_CROSSOVER_VC), + num_entries); + if (ret) + return ret; + + ret = qcom_scm_io_writel(SEQUENCER_REG(seq_addr, SEQ_APM_THRESH_VC), + apm_vc); + if (ret) + return ret; + + ret = qcom_scm_io_writel(SEQUENCER_REG(seq_addr, SEQ_APM_THRESH_PREVC), + apm_vc - 1); + if (ret) + return ret; + + ret = qcom_scm_io_writel(SEQUENCER_REG(seq_addr, SEQ_APM_PARAM), + (0x39 | apm_vc << 6)); + if (ret) + return ret; + + dev_dbg(cpu_dev, "Wrote APM Pair: [%u-%u]\n", apm_vc - 1, apm_vc); + return ret; +} + +/** + * qcom_cpufreq_hw_read_lut - Read Lookup Table from the OSM + * @cpu_dev: CPU device + * @policy: CPUFreq policy structure + * + * The Operating State Manager Lookup Table can always be read, even + * in case it was pre-programmed by the bootloader or by TrustZone. + * Read the LUT from it in order to build OPPs containing DVFS info. + * + * Returns: Zero for success, otherwise negative number on errors. + */ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, struct cpufreq_policy *policy) { @@ -166,7 +1066,9 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, for (i = 0; i < LUT_MAX_ENTRIES; i++) { data = readl_relaxed(drv_data->base + soc_data->reg_freq_lut + i * soc_data->lut_row_size); - src = FIELD_GET(LUT_SRC, data); + src = data & soc_data->reg_freq_lut_src_mask; + src >>= ffs(soc_data->reg_freq_lut_src_mask) - 1; + lval = FIELD_GET(LUT_L_VAL, data); core_count = FIELD_GET(LUT_CORE_COUNT, data); @@ -175,17 +1077,21 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, volt = FIELD_GET(LUT_VOLT, data) * 1000; if (src) - freq = xo_rate * lval / 1000; + freq = xo_rate * lval; else - freq = cpu_hw_rate / 1000; + freq = cpu_hw_rate; + freq /= 1000; if (freq != prev_freq && core_count != LUT_TURBO_IND) { if (!qcom_cpufreq_update_opp(cpu_dev, freq, volt)) { table[i].frequency = freq; - dev_dbg(cpu_dev, "index=%d freq=%d, core_count %d\n", i, - freq, core_count); + dev_dbg(cpu_dev, + "index=%d freq=%d, core_count %d\n", + i, freq, core_count); } else { - dev_warn(cpu_dev, "failed to update OPP for freq=%d\n", freq); + dev_warn(cpu_dev, + "failed to update OPP for freq=%d\n", + freq); table[i].frequency = CPUFREQ_ENTRY_INVALID; } @@ -205,18 +1111,19 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, * as the boost frequency */ if (prev->frequency == CPUFREQ_ENTRY_INVALID) { - if (!qcom_cpufreq_update_opp(cpu_dev, prev_freq, volt)) { + if (!qcom_cpufreq_update_opp(cpu_dev, prev_freq, + volt)) { prev->frequency = prev_freq; prev->flags = CPUFREQ_BOOST_FREQ; } else { - dev_warn(cpu_dev, "failed to update OPP for freq=%d\n", + dev_warn(cpu_dev, + "can't update OPP for freq=%u\n", freq); } } break; } - prev_freq = freq; } @@ -227,10 +1134,18 @@ static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev, return 0; } -static void qcom_get_related_cpus(int index, struct cpumask *m) +/* + * qcom_get_related_cpus - Get mask of CPUs in the same frequency domain + * @index: CPU number + * @m: Returned CPU mask + * + * Returns: Count of CPUs inserted in the cpumask or negative number for error. + */ +static int qcom_get_related_cpus(int index, struct cpumask *m) { struct device_node *cpu_np; struct of_phandle_args args; + int count = 0; int cpu, ret; for_each_possible_cpu(cpu) { @@ -245,34 +1160,237 @@ static void qcom_get_related_cpus(int index, struct cpumask *m) if (ret < 0) continue; - if (index == args.args[0]) + if (index == args.args[0]) { cpumask_set_cpu(cpu, m); + count++; + } } + + return count > 0 ? count : -EINVAL; } static const struct qcom_cpufreq_soc_data qcom_soc_data = { .reg_enable = 0x0, .reg_freq_lut = 0x110, + .reg_freq_lut_src_mask = LUT_SRC_845, .reg_volt_lut = 0x114, .reg_perf_state = 0x920, .lut_row_size = 32, + .clk_hw_div = 2, + .uses_tz = true, +}; + +static const struct qcom_cpufreq_soc_data msm8998_soc_data = { + .reg_enable = 0x4, + .reg_index = 0x150, + .reg_freq_lut = 0x154, + .reg_freq_lut_src_mask = LUT_SRC_8998, + .reg_volt_lut = 0x158, + .reg_perf_state = 0xf10, + .lut_row_size = 32, + .clk_hw_div = 1, + .uses_tz = false, + .setup_regs = { + /* Physical offset for sequencer scm calls */ + .reg_osm_sequencer = 0x300, + + /* Frequency domain offsets */ + .reg_override = 0x15c, + .reg_spare = 0x164, + .reg_cc_zero_behav = 0x0c, + .reg_spm_cc_hyst = 0x1c, + .reg_spm_cc_dcvs_dis = 0x20, + .reg_spm_core_ret_map = 0x24, + .reg_llm_freq_vote_hyst = 0x2c, + .reg_llm_volt_vote_hyst = 0x30, + .reg_llm_intf_dcvs_dis = 0x34, + .reg_seq1 = 0x48, + .reg_pdn_fsm_ctrl = 0x70, + .reg_cc_boost_timer = 0x74, + .reg_dcvs_boost_timer = 0x84, + .reg_ps_boost_timer = 0x94, + .boost_timer_reg_len = 0x4, + .reg_boost_sync_delay = 0xa0, + .reg_droop_ctrl = 0xa4, + .reg_droop_release_ctrl = 0xa8, + .reg_droop_unstall_ctrl = 0xac, + .reg_droop_wait_release_ctrl = 0xb0, + .reg_droop_timer_ctrl = 0xb8, + .reg_droop_sync_delay = 0xbc, + .reg_pll_override = 0xc0, + .reg_cycle_counter = 0xf00, + }, + .acd_data = { + .acd_ctrl_reg = 0x4, + .tl_delay_reg = 0x8, + .softstart_reg = 0x28, + .ext_intf_reg = 0x30, + .dcvs_sw_reg = 0x34, + .gfmux_cfg_reg = 0x3c, + .auto_xfer_cfg_reg = 0x80, + .auto_xfer_reg = 0x84, + .auto_xfer_ctl_reg = 0x88, + .auto_xfer_sts_reg = 0x8c, + .write_ctl_reg = 0x90, + .write_sts_reg = 0x94, + .tl_delay_val = 38417, + .acd_ctrl_val = 0x2b5ffd, + .softstart_val = 0x501, + .ext_intf0_val = 0x2cf9ae8, + .ext_intf1_val = 0x2cf9afe, + .auto_xfer_val = 0x15, + }, }; static const struct qcom_cpufreq_soc_data epss_soc_data = { .reg_enable = 0x0, .reg_freq_lut = 0x100, + .reg_freq_lut_src_mask = LUT_SRC_845, .reg_volt_lut = 0x200, .reg_perf_state = 0x320, .lut_row_size = 4, + .clk_hw_div = 2, + .uses_tz = true, }; static const struct of_device_id qcom_cpufreq_hw_match[] = { { .compatible = "qcom,cpufreq-hw", .data = &qcom_soc_data }, + { .compatible = "qcom,cpufreq-hw-8998", .data = &msm8998_soc_data }, { .compatible = "qcom,cpufreq-epss", .data = &epss_soc_data }, {} }; MODULE_DEVICE_TABLE(of, qcom_cpufreq_hw_match); +/** + * qcom_cpufreq_hw_osm_setup - Setup and enable the OSM + * @cpu_dev: CPU device + * @policy: CPUFreq policy structure + * @cpu_count: Number of CPUs in the frequency domain + * + * On some platforms, the Operating State Manager (OSM) is not getting + * programmed by the bootloader, nor by TrustZone before booting the OS + * and its register space is not write-protected by the hypervisor. + * In this case, to achieve CPU DVFS, it is needed to program it from + * the OS itself, which includes setting LUT and all the various tunables + * that are required for it to manage the CPU frequencies and voltages + * on its own. + * Calling this function on a platform that had the OSM set-up by TZ + * will result in a hypervisor fault with system reboot in most cases. + * + * Returns: Zero for success, otherwise negative number on errors. + */ +static int qcom_cpufreq_hw_osm_setup(struct device *cpu_dev, + struct cpufreq_policy *policy, + int cpu_count, int index) +{ + struct qcom_cpufreq_data *drv_data = policy->driver_data; + const struct qcom_cpufreq_soc_setup_data *setup_regs; + u32 val; + int ret; + + ret = qcom_cpufreq_hw_write_lut(cpu_dev, policy, cpu_count, index); + if (ret) + return ret; + + setup_regs = &drv_data->soc_data->setup_regs; + + /* Set OSM to XO clock ratio and use XO edge for the cycle counter */ + val = FIELD_PREP(CYCLE_COUNTER_CLK_RATIO, OSM_XO_RATIO_VAL); + val |= CYCLE_COUNTER_USE_XO_EDGE; + + /* Enable the CPU cycle counter */ + val |= BIT(0); + writel_relaxed(val, drv_data->base + setup_regs->reg_cycle_counter); + + /* CoreCount DCVS Policy: Wait time for frequency inc/decrement */ + val = FIELD_PREP(HYSTERESIS_UP_MASK, HYSTERESIS_CC_NS); + val |= FIELD_PREP(HYSTERESIS_DN_MASK, HYSTERESIS_CC_NS); + writel_relaxed(val, drv_data->base + setup_regs->reg_spm_cc_hyst); + + /* Set the frequency index 0 and override for cluster power collapse */ + writel_relaxed(BIT(0), drv_data->base + setup_regs->reg_cc_zero_behav); + + /* Treat cores in retention as active */ + writel_relaxed(0, drv_data->base + setup_regs->reg_spm_core_ret_map); + + /* Enable CoreCount based DCVS */ + writel_relaxed(0, drv_data->base + setup_regs->reg_spm_cc_dcvs_dis); + + /* CoreCount DCVS-LLM Policy: Wait time for frequency inc/decrement */ + val = FIELD_PREP(HYSTERESIS_UP_MASK, HYSTERESIS_LLM_NS); + val |= FIELD_PREP(HYSTERESIS_DN_MASK, HYSTERESIS_LLM_NS); + writel_relaxed(val, drv_data->base + setup_regs->reg_llm_freq_vote_hyst); + + /* CoreCount DCVS-LLM Policy: Wait time for voltage inc/decrement */ + val = FIELD_PREP(HYSTERESIS_UP_MASK, HYSTERESIS_LLM_NS); + val |= FIELD_PREP(HYSTERESIS_DN_MASK, HYSTERESIS_LLM_NS); + writel_relaxed(val, drv_data->base + setup_regs->reg_llm_volt_vote_hyst); + + /* Enable LLM frequency+voltage voting */ + writel_relaxed(0, drv_data->base + setup_regs->reg_llm_intf_dcvs_dis); + + /* Setup Boost FSM Timers */ + qcom_cpufreq_hw_boost_setup(drv_data->base + + setup_regs->reg_cc_boost_timer, + setup_regs->boost_timer_reg_len); + qcom_cpufreq_hw_boost_setup(drv_data->base + + setup_regs->reg_dcvs_boost_timer, + setup_regs->boost_timer_reg_len); + qcom_cpufreq_hw_boost_setup(drv_data->base + + setup_regs->reg_ps_boost_timer, + setup_regs->boost_timer_reg_len); + + /* PLL signal timing control for Boost */ + writel_relaxed(BOOST_SYNC_DELAY, + drv_data->base + setup_regs->reg_boost_sync_delay); + + /* Setup WFx and PC/RET droop unstall */ + val = FIELD_PREP(DROOP_TIMER1, DROOP_TIMER_NS); + val |= FIELD_PREP(DROOP_TIMER0, DROOP_TIMER_NS); + writel_relaxed(val, drv_data->base + setup_regs->reg_droop_unstall_ctrl); + + /* Setup WFx and PC/RET droop wait-to-release */ + val = FIELD_PREP(DROOP_TIMER1, DROOP_WAIT_RELEASE_TIMER_NS); + val |= FIELD_PREP(DROOP_TIMER0, DROOP_WAIT_RELEASE_TIMER_NS); + writel_relaxed(val, + drv_data->base + setup_regs->reg_droop_wait_release_ctrl); + + /* PLL signal timing control for Droop */ + writel_relaxed(1, drv_data->base + setup_regs->reg_droop_sync_delay); + + /* Setup DCVS timers */ + writel_relaxed(DROOP_RELEASE_TIMER_NS, + drv_data->base + setup_regs->reg_droop_release_ctrl); + writel_relaxed(DROOP_TIMER_NS, + drv_data->base + setup_regs->reg_droop_timer_ctrl); + + /* Setup Droop control */ + val = readl_relaxed(drv_data->base + setup_regs->reg_droop_ctrl); + val |= DROOP_CTRL_VAL; + writel_relaxed(val, drv_data->base + setup_regs->reg_droop_ctrl); + + /* Enable CC-Boost, DCVS-Boost, PS-Boost, WFx, PC/RET, DCVS FSM */ + val = readl_relaxed(drv_data->base + setup_regs->reg_pdn_fsm_ctrl); + val |= CC_BOOST_EN | PS_BOOST_EN | DCVS_BOOST_EN; + val |= WFX_DROOP_EN | PC_RET_EXIT_DROOP_EN | DCVS_DROOP_EN; + writel_relaxed(val, drv_data->base + setup_regs->reg_pdn_fsm_ctrl); + + /* Enable PLL Droop Override */ + val = PLL_OVERRIDE_DROOP_EN; + writel_relaxed(val, drv_data->base + setup_regs->reg_pll_override); + + /* Initialize the Adaptive Clock Distribution */ + ret = qcom_cpufreq_hw_acd_init(cpu_dev, policy, index); + if (ret) + return ret; + + /* We're ready: enable the OSM and give it time to boot (5uS) */ + writel_relaxed(1, drv_data->base + drv_data->soc_data->reg_enable); + udelay(OSM_BOOT_TIME_US); + + return ret; +} + static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) { struct platform_device *pdev = cpufreq_get_driver_data(); @@ -282,7 +1400,8 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) struct device *cpu_dev; void __iomem *base; struct qcom_cpufreq_data *data; - int ret, index; + const char *fdom_resname; + int cpu_count, index, ret; cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) { @@ -303,9 +1422,14 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) index = args.args[0]; - base = devm_platform_ioremap_resource(pdev, index); + fdom_resname = kasprintf(GFP_KERNEL, "freq-domain%d", index); + if (!fdom_resname) + return -ENOMEM; + + base = devm_platform_ioremap_resource_byname(pdev, fdom_resname); if (IS_ERR(base)) return PTR_ERR(base); + kfree(fdom_resname); data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); if (!data) { @@ -315,22 +1439,31 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) data->soc_data = of_device_get_match_data(&pdev->dev); data->base = base; + policy->driver_data = data; - /* HW should be in enabled state to proceed */ - if (!(readl_relaxed(base + data->soc_data->reg_enable) & 0x1)) { - dev_err(dev, "Domain-%d cpufreq hardware not enabled\n", index); - ret = -ENODEV; - goto error; - } - - qcom_get_related_cpus(index, policy->cpus); + cpu_count = qcom_get_related_cpus(index, policy->cpus); if (!cpumask_weight(policy->cpus)) { dev_err(dev, "Domain-%d failed to get related CPUs\n", index); ret = -ENOENT; goto error; } - policy->driver_data = data; + if (!data->soc_data->uses_tz) { + ret = qcom_cpufreq_hw_osm_setup(cpu_dev, policy, + cpu_count, index); + if (ret) { + dev_err(dev, "Cannot setup the OSM for CPU%d: %d\n", + policy->cpu, ret); + goto error; + } + } + + /* HW should be in enabled state to proceed */ + if (!(readl_relaxed(base + data->soc_data->reg_enable) & 0x1)) { + dev_err(dev, "Domain-%d cpufreq hardware not enabled\n", index); + ret = -ENODEV; + goto error; + } ret = qcom_cpufreq_hw_read_lut(cpu_dev, policy); if (ret) { @@ -355,6 +1488,7 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) return 0; error: + policy->driver_data = NULL; devm_iounmap(dev, base); return ret; } @@ -395,9 +1529,51 @@ static struct cpufreq_driver cpufreq_qcom_hw_driver = { static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev) { + const struct qcom_cpufreq_soc_data *soc_data; + struct device_node *pd_node; + struct platform_device *pd_dev; struct device *cpu_dev; struct clk *clk; - int ret; + int clk_div, ret; + + cpu_dev = get_cpu_device(0); + if (!cpu_dev) + return -EPROBE_DEFER; + + soc_data = of_device_get_match_data(&pdev->dev); + if (!soc_data) + return -EINVAL; + + if (!soc_data->uses_tz) { + /* + * When the OSM is not pre-programmed from TZ, we will + * need to program the sequencer through SCM calls. + */ + if (!qcom_scm_is_available()) + return -EPROBE_DEFER; + + /* + * If there are no power-domains, OSM programming cannot be + * performed, as in that case, we wouldn't know where to take + * the params from... + */ + pd_node = of_parse_phandle(cpu_dev->of_node, + "power-domains", 0); + if (!pd_node) { + ret = PTR_ERR(pd_node); + dev_err(cpu_dev, "power domain not found: %d\n", ret); + return ret; + } + + /* + * If the power domain device is not registered yet, then + * defer probing this driver until that is available. + */ + pd_dev = of_find_device_by_node(pd_node); + if (!pd_dev || !pd_dev->dev.driver || + !device_is_bound(&pd_dev->dev)) + return -EPROBE_DEFER; + } clk = clk_get(&pdev->dev, "xo"); if (IS_ERR(clk)) @@ -410,16 +1586,16 @@ static int qcom_cpufreq_hw_driver_probe(struct platform_device *pdev) if (IS_ERR(clk)) return PTR_ERR(clk); - cpu_hw_rate = clk_get_rate(clk) / CLK_HW_DIV; + clk_div = soc_data->clk_hw_div; + if (clk_div == 0) + clk_div++; + + cpu_hw_rate = clk_get_rate(clk) / clk_div; clk_put(clk); cpufreq_qcom_hw_driver.driver_data = pdev; /* Check for optional interconnect paths on CPU0 */ - cpu_dev = get_cpu_device(0); - if (!cpu_dev) - return -EPROBE_DEFER; - ret = dev_pm_opp_of_find_icc_paths(cpu_dev, NULL); if (ret) return ret; From patchwork Tue Jan 19 17:45:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 367297 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1CDA9C4332B for ; Tue, 19 Jan 2021 21:27:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D1F372310B for ; Tue, 19 Jan 2021 21:27:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728331AbhASSo0 (ORCPT ); Tue, 19 Jan 2021 13:44:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40644 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392096AbhASRzv (ORCPT ); Tue, 19 Jan 2021 12:55:51 -0500 Received: from relay06.th.seeweb.it (relay06.th.seeweb.it [IPv6:2001:4b7a:2000:18::167]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 051E8C061798; Tue, 19 Jan 2021 09:48:47 -0800 (PST) Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id 8039E3F211; Tue, 19 Jan 2021 18:46:00 +0100 (CET) From: AngeloGioacchino Del Regno To: viresh.kumar@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, rjw@rjwysocki.net, devicetree@vger.kernel.org, robh+dt@kernel.org, amit.kucheria@linaro.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, jeffrey.l.hugo@gmail.com, AngeloGioacchino Del Regno Subject: [PATCH v4 6/7] cpufreq: qcom-hw: Allow getting the maximum transition latency for OPPs Date: Tue, 19 Jan 2021 18:45:56 +0100 Message-Id: <20210119174557.227318-7-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> References: <20210119174557.227318-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org In order to fine-tune the frequency scaling from various governors, allow to set a maximum transition latency from OPPs, which may be different depending on the SoC. Signed-off-by: AngeloGioacchino Del Regno Acked-by: Bjorn Andersson --- drivers/cpufreq/qcom-cpufreq-hw.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c index a92959bb7b50..5f67da796f6c 100644 --- a/drivers/cpufreq/qcom-cpufreq-hw.c +++ b/drivers/cpufreq/qcom-cpufreq-hw.c @@ -1401,6 +1401,7 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) void __iomem *base; struct qcom_cpufreq_data *data; const char *fdom_resname; + unsigned int transition_latency; int cpu_count, index, ret; cpu_dev = get_cpu_device(policy->cpu); @@ -1478,6 +1479,12 @@ static int qcom_cpufreq_hw_cpu_init(struct cpufreq_policy *policy) goto error; } + transition_latency = dev_pm_opp_get_max_transition_latency(cpu_dev); + if (!transition_latency) + transition_latency = CPUFREQ_ETERNAL; + + policy->cpuinfo.transition_latency = transition_latency; + dev_pm_opp_of_register_em(cpu_dev, policy->cpus); if (policy_has_boost_freq(policy)) { From patchwork Tue Jan 19 17:44:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 366306 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5B85AC433E6 for ; Tue, 19 Jan 2021 21:27:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08C4922D08 for ; Tue, 19 Jan 2021 21:27:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728536AbhASSov (ORCPT ); Tue, 19 Jan 2021 13:44:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389051AbhASR5V (ORCPT ); Tue, 19 Jan 2021 12:57:21 -0500 Received: from relay05.th.seeweb.it (relay05.th.seeweb.it [IPv6:2001:4b7a:2000:18::166]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 27E51C061799 for ; Tue, 19 Jan 2021 09:44:27 -0800 (PST) Received: from IcarusMOD.eternityproject.eu (unknown [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by m-r2.th.seeweb.it (Postfix) with ESMTPSA id 805123F114; Tue, 19 Jan 2021 18:44:25 +0100 (CET) From: AngeloGioacchino Del Regno To: linux-arm-msm@vger.kernel.org Cc: agross@kernel.org, bjorn.andersson@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, sumit.semwal@linaro.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, phone-devel@vger.kernel.org, konrad.dybcio@somainline.org, marijn.suijten@somainline.org, martin.botka@somainline.org, AngeloGioacchino Del Regno Subject: [PATCH v4 7/7] arm64: dts: pmi8998: Add the right interrupts for LAB/IBB SCP and OCP Date: Tue, 19 Jan 2021 18:44:21 +0100 Message-Id: <20210119174421.226541-8-angelogioacchino.delregno@somainline.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210119174421.226541-1-angelogioacchino.delregno@somainline.org> References: <20210119174421.226541-1-angelogioacchino.delregno@somainline.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org In commit 208921bae696 ("arm64: dts: qcom: pmi8998: Add nodes for LAB and IBB regulators") bindings for the lab/ibb regulators were added to the pmi8998 dt, but the original committer has never specified what the interrupts were for. LAB and IBB regulators provide two interrupts, SC-ERR (short circuit error) and VREG-OK but, in that commit, the regulators were provided with two different types of interrupts; specifically, IBB had the SC-ERR interrupt, while LAB had the VREG-OK one, none of which were (luckily) used, since the driver didn't actually use these at all. Assuming that the original intention was to have the SC IRQ in both LAB and IBB, as per the names appearing in documentation, fix the SCP interrupt. While at it, also add the OCP interrupt in order to be able to enable the Over-Current Protection feature, if requested. Signed-off-by: AngeloGioacchino Del Regno Reviewed-by: Bjorn Andersson --- arch/arm64/boot/dts/qcom/pmi8998.dtsi | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/qcom/pmi8998.dtsi b/arch/arm64/boot/dts/qcom/pmi8998.dtsi index d016b12967eb..d230c510d4b7 100644 --- a/arch/arm64/boot/dts/qcom/pmi8998.dtsi +++ b/arch/arm64/boot/dts/qcom/pmi8998.dtsi @@ -30,11 +30,15 @@ labibb { compatible = "qcom,pmi8998-lab-ibb"; ibb: ibb { - interrupts = <0x3 0xdc 0x2 IRQ_TYPE_EDGE_RISING>; + interrupts = <0x3 0xdc 0x2 IRQ_TYPE_EDGE_RISING>, + <0x3 0xdc 0x0 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "sc-err", "ocp"; }; lab: lab { - interrupts = <0x3 0xde 0x0 IRQ_TYPE_EDGE_RISING>; + interrupts = <0x3 0xde 0x1 IRQ_TYPE_EDGE_RISING>, + <0x3 0xde 0x0 IRQ_TYPE_LEVEL_LOW>; + interrupt-names = "sc-err", "ocp"; }; }; };