From patchwork Mon Jul 3 18:15:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konrad Dybcio X-Patchwork-Id: 698760 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 E6DB9C30654 for ; Mon, 3 Jul 2023 18:16:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231153AbjGCSQK (ORCPT ); Mon, 3 Jul 2023 14:16:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39498 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230043AbjGCSQH (ORCPT ); Mon, 3 Jul 2023 14:16:07 -0400 Received: from mail-lf1-x12a.google.com (mail-lf1-x12a.google.com [IPv6:2a00:1450:4864:20::12a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B26B3DD for ; Mon, 3 Jul 2023 11:16:04 -0700 (PDT) Received: by mail-lf1-x12a.google.com with SMTP id 2adb3069b0e04-4f95bf5c493so7122599e87.3 for ; Mon, 03 Jul 2023 11:16:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1688408163; x=1691000163; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=yppVVJZsVALQlxVkrk6bRQIocnUZEUf5eYssW3dPax0=; b=PZv50YTxGjUL+H8+y3K2oF7zo66LmTqSJu6hiAKLFiYHUK/rL8dgCegUsRvZSU6aZb 7qPQYy1VJHO+iUZbH3AhD2efLKXlY3TW0iwQplS9vcHTJnHvW+Z8R64jCiA5F61vz9G1 WhmEqa0kSXyY8hUjHPmZ77CKRVrnuw5YgdvgfrUeh1yhlDZmKedhCpAaN1hrZTu+Pz8p KEfS88zX7NkBBNjaAbtesgpC1SS/lbLrH+P5wY/Y2yfj521/HO6XjKRExquhBZCM6Ccl Hicz3L0FY4NDGHKt4H1fM7Wk0OGiS1cDuZIrqCkVPh3+ON72N9g0vqXIKteKPJGbZ3lp 419w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688408163; x=1691000163; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=yppVVJZsVALQlxVkrk6bRQIocnUZEUf5eYssW3dPax0=; b=j3Szbu6F8Xu45ZqL7RS5+wgTdbfbZ8fL9oi767dSS0aXzopOfxFUVw/XtpMQvnqMKJ EZzvdfRBXeM/rTXsOfyGYrl2zkkjf12VucvoizW/UNFhPErlqyhao3X1LLeow4wZ3P1M BuusR8rQfh44SzO1B30H9xJkFZ+B5imfM/SRO1dnqxTycu7noO8wY3NxewnLf0p7834U G3hSBjk3mg8m3i0kyPdspWJfcQf4/RuuV8GhYEuC+bfStSD10tNKONkj1t2Wcs9B6eKy WrQbFzNXGA2iihoZyR8Y9T1G6hTlY3zXWa+WB6srByG83e8pG9GM3xHjh6lVdiAvTKUv 4rTg== X-Gm-Message-State: ABy/qLaUNPCcsmpmE55oE2DldnXaSYfJEVGxNdYkkzVPHXgx72EJ3R3L ypND+l3aWVETipp7jLeQIXGnjk4vugGjKRo7oqbPgg== X-Google-Smtp-Source: APBJJlGJYrTrFXurxhsL9mUzOD78TanI0VM1Nsoofsh7pHoqjHCkKu+3IWV6L4IPZRhS/K+gEjXUPQ== X-Received: by 2002:a05:6512:5c4:b0:4fb:8965:7882 with SMTP id o4-20020a05651205c400b004fb89657882mr6183156lfo.35.1688408162717; Mon, 03 Jul 2023 11:16:02 -0700 (PDT) Received: from [192.168.1.101] (abyj26.neoplus.adsl.tpnet.pl. [83.9.29.26]) by smtp.gmail.com with ESMTPSA id a6-20020a056512390600b004f1383d57ecsm4633034lfu.202.2023.07.03.11.16.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jul 2023 11:16:02 -0700 (PDT) From: Konrad Dybcio Date: Mon, 03 Jul 2023 20:15:55 +0200 Subject: [PATCH v3 2/4] regulator: Introduce Qualcomm REFGEN regulator driver MIME-Version: 1.0 Message-Id: <20230628-topic-refgen-v3-2-9fbf0e605d23@linaro.org> References: <20230628-topic-refgen-v3-0-9fbf0e605d23@linaro.org> In-Reply-To: <20230628-topic-refgen-v3-0-9fbf0e605d23@linaro.org> To: Andy Gross , Bjorn Andersson , Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , David Airlie , Daniel Vetter , Krishna Manikandan Cc: Marijn Suijten , Konrad Dybcio , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, Konrad Dybcio X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1688408157; l=6762; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=pjLeGl5c7AIRN3onIFXcWrE2ZGIUzY+F26Ci1naF9rY=; b=zyzA+EFWkLUHUvbbwQvhdFMSA9gTAsia8dHBonOdb/FkF5+cpeQWP/+rvMtK/O/Rwchn9ojGB RZnwKZYj4I9D0L95uHNsaybSP8e+Ji6wBDU4NWE0b6GCoi+t9PlS/hP X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Modern Qualcomm SoCs have a REFGEN (reference voltage generator) regulator, providing reference voltage to on-chip IP, like PHYs. Add a driver to support toggling that regulator. Signed-off-by: Konrad Dybcio --- drivers/regulator/Kconfig | 11 +++ drivers/regulator/Makefile | 1 + drivers/regulator/qcom-refgen-regulator.c | 154 ++++++++++++++++++++++++++++++ 3 files changed, 166 insertions(+) diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 823f8e6e4801..18a05b09406f 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -989,6 +989,17 @@ config REGULATOR_PWM This driver supports PWM controlled voltage regulators. PWM duty cycle can increase or decrease the voltage. +config REGULATOR_QCOM_REFGEN + tristate "Qualcomm REFGEN regulator driver" + depends on HAS_IOMEM + depends on REGMAP + help + This driver supports the MMIO-mapped reference voltage regulator, + used internally by some PHYs on many Qualcomm SoCs. + + Say M here if you want to include support for this regulator as + a module. The module will be named "qcom-refgen-regulator". + config REGULATOR_QCOM_RPM tristate "Qualcomm RPM regulator driver" depends on MFD_QCOM_RPM diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 15e0d614ff66..4f4589877e81 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -108,6 +108,7 @@ obj-$(CONFIG_REGULATOR_MT6380) += mt6380-regulator.o obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o obj-$(CONFIG_REGULATOR_MTK_DVFSRC) += mtk-dvfsrc-regulator.o obj-$(CONFIG_REGULATOR_QCOM_LABIBB) += qcom-labibb-regulator.o +obj-$(CONFIG_REGULATOR_QCOM_REFGEN) += qcom-refgen-regulator.o obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o obj-$(CONFIG_REGULATOR_QCOM_RPMH) += qcom-rpmh-regulator.o obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o diff --git a/drivers/regulator/qcom-refgen-regulator.c b/drivers/regulator/qcom-refgen-regulator.c new file mode 100644 index 000000000000..656fe330d38f --- /dev/null +++ b/drivers/regulator/qcom-refgen-regulator.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (c) 2017, 2019-2020, The Linux Foundation. All rights reserved. +// Copyright (c) 2023, Linaro Limited + +#include +#include +#include +#include +#include +#include +#include +#include + +#define REFGEN_REG_BIAS_EN 0x08 +#define REFGEN_BIAS_EN_MASK GENMASK(2, 0) + #define REFGEN_BIAS_EN_ENABLE 0x7 + #define REFGEN_BIAS_EN_DISABLE 0x6 + +#define REFGEN_REG_BG_CTRL 0x14 +#define REFGEN_BG_CTRL_MASK GENMASK(2, 1) + #define REFGEN_BG_CTRL_ENABLE 0x3 + #define REFGEN_BG_CTRL_DISABLE 0x2 + +#define REFGEN_REG_PWRDWN_CTRL5 0x80 +#define REFGEN_PWRDWN_CTRL5_MASK BIT(0) + #define REFGEN_PWRDWN_CTRL5_ENABLE 0x1 + +static int qcom_sdm845_refgen_enable(struct regulator_dev *rdev) +{ + regmap_update_bits(rdev->regmap, REFGEN_REG_BG_CTRL, REFGEN_BG_CTRL_MASK, + FIELD_PREP(REFGEN_BG_CTRL_MASK, REFGEN_BG_CTRL_ENABLE)); + + regmap_write(rdev->regmap, REFGEN_REG_BIAS_EN, + FIELD_PREP(REFGEN_BIAS_EN_MASK, REFGEN_BIAS_EN_ENABLE)); + + return 0; +} + +static int qcom_sdm845_refgen_disable(struct regulator_dev *rdev) +{ + regmap_write(rdev->regmap, REFGEN_REG_BIAS_EN, + FIELD_PREP(REFGEN_BIAS_EN_MASK, REFGEN_BIAS_EN_DISABLE)); + + regmap_update_bits(rdev->regmap, REFGEN_REG_BG_CTRL, REFGEN_BG_CTRL_MASK, + FIELD_PREP(REFGEN_BG_CTRL_MASK, REFGEN_BG_CTRL_DISABLE)); + + return 0; +} + +static int qcom_sdm845_refgen_is_enabled(struct regulator_dev *rdev) +{ + u32 val; + + regmap_read(rdev->regmap, REFGEN_REG_BG_CTRL, &val); + if (FIELD_GET(REFGEN_BG_CTRL_MASK, val) != REFGEN_BG_CTRL_ENABLE) + return 0; + + regmap_read(rdev->regmap, REFGEN_REG_BIAS_EN, &val); + if (FIELD_GET(REFGEN_BIAS_EN_MASK, val) != REFGEN_BIAS_EN_ENABLE) + return 0; + + return 1; +} + +static struct regulator_desc sdm845_refgen_desc = { + .enable_time = 5, + .name = "refgen", + .owner = THIS_MODULE, + .type = REGULATOR_VOLTAGE, + .ops = &(const struct regulator_ops) { + .enable = qcom_sdm845_refgen_enable, + .disable = qcom_sdm845_refgen_disable, + .is_enabled = qcom_sdm845_refgen_is_enabled, + }, +}; + +static struct regulator_desc sm8250_refgen_desc = { + .enable_reg = REFGEN_REG_PWRDWN_CTRL5, + .enable_mask = REFGEN_PWRDWN_CTRL5_MASK, + .enable_val = REFGEN_PWRDWN_CTRL5_ENABLE, + .disable_val = 0, + .enable_time = 5, + .name = "refgen", + .owner = THIS_MODULE, + .type = REGULATOR_VOLTAGE, + .ops = &(const struct regulator_ops) { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + }, +}; + +static const struct regmap_config qcom_refgen_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .fast_io = true, +}; + +static int qcom_refgen_probe(struct platform_device *pdev) +{ + struct regulator_init_data *init_data; + struct regulator_config config = {}; + const struct regulator_desc *rdesc; + struct device *dev = &pdev->dev; + struct regulator_dev *rdev; + struct regmap *regmap; + void __iomem *base; + + rdesc = of_device_get_match_data(dev); + if (!rdesc) + return -ENODATA; + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + regmap = devm_regmap_init_mmio(dev, base, &qcom_refgen_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + init_data = of_get_regulator_init_data(dev, dev->of_node, rdesc); + if (!init_data) + return -ENOMEM; + + config.dev = dev; + config.init_data = init_data; + config.of_node = dev->of_node; + config.regmap = regmap; + + rdev = devm_regulator_register(dev, rdesc, &config); + if (IS_ERR(rdev)) + return PTR_ERR(rdev); + + return 0; +} + +static const struct of_device_id qcom_refgen_match_table[] = { + { .compatible = "qcom,sdm845-refgen-regulator", .data = &sdm845_refgen_desc }, + { .compatible = "qcom,sm8250-refgen-regulator", .data = &sm8250_refgen_desc }, + { } +}; + +static struct platform_driver qcom_refgen_driver = { + .probe = qcom_refgen_probe, + .driver = { + .name = "qcom-refgen-regulator", + .of_match_table = qcom_refgen_match_table, + }, +}; +module_platform_driver(qcom_refgen_driver); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Qualcomm REFGEN regulator driver");