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The CBF clock should follow the CPU frequencies to provide enough bandwidth between clusters. Thus a single driver implements both a clock and an interconnect to set the clock rate. Signed-off-by: Dmitry Baryshkov --- .../bindings/clock/qcom,msm8996-cbf.yaml | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/qcom,msm8996-cbf.yaml diff --git a/Documentation/devicetree/bindings/clock/qcom,msm8996-cbf.yaml b/Documentation/devicetree/bindings/clock/qcom,msm8996-cbf.yaml new file mode 100644 index 000000000000..2080e1743b2e --- /dev/null +++ b/Documentation/devicetree/bindings/clock/qcom,msm8996-cbf.yaml @@ -0,0 +1,53 @@ +# SPDX-License-Identifier: GPL-2.0-only +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/clock/qcom,msm8996-cbf.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm MSM8996 Core Bus Fabric (CBF) clock controller + +maintainers: + - Dmitry Baryshkov + +description: > + The clock controller for the Qualcomm MSM8996 CBF clock, which drives the + interconnect between two CPU clusters. + +properties: + compatible: + const: qcom,msm8996-cbf + + reg: + maxItems: 1 + + clocks: + items: + - description: XO source + - description: SYS APCS AUX clock + + '#clock-cells': + const: 0 + + '#interconnect-cells': + const: 1 + +required: + - compatible + - reg + - clocks + - '#clock-cells' + - '#interconnect-cells' + +additionalProperties: false + +examples: + - | + #include + clock-controller@9a11000 { + compatible = "qcom,msm8996-cbf"; + reg = <0x09a11000 0x10000>; + clocks = <&rpmcc RPM_SMD_BB_CLK1>, <&apcs_glb>; + #clock-cells = <0>; + #interconnect-cells = <1>; + }; +... From patchwork Wed Jan 11 19:57:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 641404 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0F528C46467 for ; Wed, 11 Jan 2023 20:01:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239082AbjAKUBI (ORCPT ); Wed, 11 Jan 2023 15:01:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239513AbjAKUAT (ORCPT ); Wed, 11 Jan 2023 15:00:19 -0500 Received: from mail-lf1-x12e.google.com (mail-lf1-x12e.google.com [IPv6:2a00:1450:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DF8343D8C for ; Wed, 11 Jan 2023 11:57:59 -0800 (PST) Received: by mail-lf1-x12e.google.com with SMTP id b3so25203730lfv.2 for ; Wed, 11 Jan 2023 11:57:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=/NrvZgeB+CKgjWF0nxmOixlt2aAT3lyLrME/WlJSKh4=; b=zqXy/yelx3GClDxVha25+BchTCPb7WYIMbUfnJZB9G4kV+FRY8X9Nxtw8ET8QLMaFx Dk4ca9Ycd7mK6WnPSAGXAdcDutpzpmiINdwnVVeyDVOPHAWkW5J8AA+R6wLTi8OFpuj+ P4xcnUMeKvf7oXuA6tZR4JgTQXElPfbIP+pdYgOAVZjyws6kizBCbzRr+k6zISOLCkBK HF1aY1HTvJHdqJJhA/KWA40eufA2kTb4ph1UZf8zz98hYbDt+3TnuPR9MrCoYOl4nWYN ++md/RkYVrfJgCN4y12NmqisF/5+0oc2MFLAZ7RsK/KPKPpaP2TsKM+aqVKmfAjaVRnD QJLA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=/NrvZgeB+CKgjWF0nxmOixlt2aAT3lyLrME/WlJSKh4=; b=sSMVRtdy7tiHWCo8drcCFdiS5WtXO+8lz04c0wCqL4MDZONLGhM8cEYx+RmNKPa9VD /U1+WxoF4FPqo2N4KkGq0SrOyr3//WG2KPQYq//MbwZ0iNDfwdiInhlqsycvfVc/ytnu mkUfW3cqdsMq2abyQr2aPqBX2bzI0ZMnZcqvYZSNFZ4c4aWgAEqhApI5NxynazIxbuOI QOwIDGm5JxooEQCkLem/+RKUHNuTWmUNWJJk/FsuP7WBRyqNXpyBoDyk1HCHL7vfPpUL DvydA/FbsRQZR1RZa7TBa1HudwweHiZ062Bi55lTLahNtIAvln2gv/8TfjmQhcU9R0mu Gu4A== X-Gm-Message-State: AFqh2koJRvspncNBuyk8mhb1KGOW8CPQ//3QP5S7MfgzSRaGDEbLDH6l 5ZHdyqIamaPVA7Sc1vbI6MRcqQ== X-Google-Smtp-Source: AMrXdXvM2UWbfpo3l1F84i2/USGkW484O+6KM3uHUrEpykGyfiSoSHvll1g07jlOgaxm3hnV8vqpqQ== X-Received: by 2002:ac2:4adb:0:b0:4cc:83a5:e64e with SMTP id m27-20020ac24adb000000b004cc83a5e64emr3147170lfp.60.1673467078038; Wed, 11 Jan 2023 11:57:58 -0800 (PST) Received: from umbar.unikie.fi ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id c3-20020ac25f63000000b0049f54c5f2a4sm2872452lfc.229.2023.01.11.11.57.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Jan 2023 11:57:57 -0800 (PST) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Stephen Boyd , Michael Turquette , Rob Herring , Krzysztof Kozlowski , Taniya Das Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 3/5] clk: qcom: cbf-msm8996: scale CBF clock according to the CPUfreq Date: Wed, 11 Jan 2023 22:57:52 +0300 Message-Id: <20230111195754.2593134-4-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230111195754.2593134-1-dmitry.baryshkov@linaro.org> References: <20230111195754.2593134-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Turn CBF into the interconnect provider. Scale CBF frequency (bandwidth) according to CPU frequencies. Signed-off-by: Dmitry Baryshkov --- drivers/clk/qcom/clk-cbf-8996.c | 141 +++++++++++++++++++++++++++++++- 1 file changed, 140 insertions(+), 1 deletion(-) diff --git a/drivers/clk/qcom/clk-cbf-8996.c b/drivers/clk/qcom/clk-cbf-8996.c index bdd4f8b48a7e..76db623b0f92 100644 --- a/drivers/clk/qcom/clk-cbf-8996.c +++ b/drivers/clk/qcom/clk-cbf-8996.c @@ -5,6 +5,7 @@ #include #include #include +#include #include #include #include @@ -225,6 +226,133 @@ static const struct regmap_config cbf_msm8996_regmap_config = { .val_format_endian = REGMAP_ENDIAN_LITTLE, }; +#ifdef CONFIG_INTERCONNECT +struct qcom_msm8996_cbf_icc_provider { + struct icc_provider provider; + struct clk *clk; +}; + +#define to_qcom_cbf_provider(_provider) \ + container_of(_provider, struct qcom_msm8996_cbf_icc_provider, provider) + +enum { + CBF_MASTER_NODE = 2000, + CBF_SLAVE_NODE +}; + +#define CBF_NUM_NODES 2 + +static int qcom_msm8996_cbf_set(struct icc_node *src, struct icc_node *dst) +{ + struct qcom_msm8996_cbf_icc_provider *qp; + + qp = to_qcom_cbf_provider(src->provider); + + return clk_set_rate(qp->clk, icc_units_to_bps(dst->peak_bw)); +} + +static int qcom_msm8996_cbf_icc_get_bw(struct icc_node *node, u32 *avg, u32 *peak) +{ + struct qcom_msm8996_cbf_icc_provider *qp; + + qp = to_qcom_cbf_provider(node->provider); + *peak = clk_get_rate(qp->clk) / 1000ULL; + + return 0; +} + +static int qcom_msm8996_cbf_icc_register(struct platform_device *pdev, struct clk_hw *cbf_hw) +{ + struct device *dev = &pdev->dev; + struct qcom_msm8996_cbf_icc_provider *qp; + struct icc_provider *provider; + struct icc_onecell_data *data; + struct icc_node *node; + struct clk *clk; + int ret; + + clk = devm_clk_hw_get_clk(dev, cbf_hw, "cbf"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + data = devm_kzalloc(dev, struct_size(data, nodes, CBF_NUM_NODES), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->num_nodes = CBF_NUM_NODES; + + qp = devm_kzalloc(dev, sizeof(*qp), GFP_KERNEL); + if (!qp) + return -ENOMEM; + + qp->clk = clk; + + provider = &qp->provider; + provider->dev = dev; + provider->get_bw = qcom_msm8996_cbf_icc_get_bw; + provider->set = qcom_msm8996_cbf_set; + provider->aggregate = icc_std_aggregate; + provider->xlate = of_icc_xlate_onecell; + INIT_LIST_HEAD(&provider->nodes); + provider->data = data; + + ret = icc_provider_add(provider); + if (ret) { + dev_err(dev, "error adding interconnect provider\n"); + return ret; + } + + node = icc_node_create(CBF_MASTER_NODE); + if (IS_ERR(node)) { + ret = PTR_ERR(node); + goto err; + } + + node->name = "cbf_master"; + icc_node_add(node, provider); + icc_link_create(node, CBF_SLAVE_NODE); + data->nodes[0] = node; + + node = icc_node_create(CBF_SLAVE_NODE); + if (IS_ERR(node)) { + ret = PTR_ERR(node); + goto err; + } + + node->name = "cbf_slave"; + icc_node_add(node, provider); + data->nodes[1] = node; + + platform_set_drvdata(pdev, provider); + + return 0; + +err: + icc_nodes_remove(provider); + icc_provider_del(provider); + + return ret; +} + +static int qcom_msm8996_cbf_icc_remove(struct platform_device *pdev) +{ + struct icc_provider *provider = platform_get_drvdata(pdev); + + icc_nodes_remove(provider); + icc_provider_del(provider); + + return 0; +} +#else +static int qcom_msm8996_cbf_icc_register(struct platform_device *pdev) +{ + dev_warn(&pdev->dev, "interconnects support is disabled, CBF clock is fixed\n"); + + return 0; +} +#define qcom_msm8996_cbf_icc_remove(pdev) (0) +#endif + static int qcom_msm8996_cbf_probe(struct platform_device *pdev) { void __iomem *base; @@ -284,7 +412,16 @@ static int qcom_msm8996_cbf_probe(struct platform_device *pdev) if (ret) return ret; - return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &cbf_mux.clkr.hw); + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &cbf_mux.clkr.hw); + if (ret) + return ret; + + return qcom_msm8996_cbf_icc_register(pdev, &cbf_mux.clkr.hw); +} + +static int qcom_msm8996_cbf_remove(struct platform_device *pdev) +{ + return qcom_msm8996_cbf_icc_remove(pdev); } static const struct of_device_id qcom_msm8996_cbf_match_table[] = { @@ -295,9 +432,11 @@ MODULE_DEVICE_TABLE(of, qcom_msm8996_cbf_match_table); static struct platform_driver qcom_msm8996_cbf_driver = { .probe = qcom_msm8996_cbf_probe, + .remove = qcom_msm8996_cbf_remove, .driver = { .name = "qcom-msm8996-cbf", .of_match_table = qcom_msm8996_cbf_match_table, + .sync_state = icc_sync_state, }, }; From patchwork Wed Jan 11 19:57:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 641403 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CBC87C46467 for ; Wed, 11 Jan 2023 20:01:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239544AbjAKUBN (ORCPT ); Wed, 11 Jan 2023 15:01:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56826 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239622AbjAKUAZ (ORCPT ); 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Wed, 11 Jan 2023 11:57:58 -0800 (PST) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Stephen Boyd , Michael Turquette , Rob Herring , Krzysztof Kozlowski , Taniya Das Cc: linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH 4/5] arm64: dts: qcom: msm8996: add CBF device entry Date: Wed, 11 Jan 2023 22:57:53 +0300 Message-Id: <20230111195754.2593134-5-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230111195754.2593134-1-dmitry.baryshkov@linaro.org> References: <20230111195754.2593134-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add device tree node for the CBF clock. Signed-off-by: Dmitry Baryshkov --- arch/arm64/boot/dts/qcom/msm8996.dtsi | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi index 37ebd8a3b2c8..e5a638b85ffc 100644 --- a/arch/arm64/boot/dts/qcom/msm8996.dtsi +++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi @@ -3558,6 +3558,13 @@ saw3: syscon@9a10000 { reg = <0x09a10000 0x1000>; }; + cbf: clock-controller@9a11000 { + compatible = "qcom,msm8996-cbf"; + reg = <0x09a11000 0x10000>; + clocks = <&rpmcc RPM_SMD_BB_CLK1>, <&apcs_glb>; + #clock-cells = <0>; + }; + intc: interrupt-controller@9bc0000 { compatible = "qcom,msm8996-gic-v3", "arm,gic-v3"; #interrupt-cells = <3>;