From patchwork Thu Jun 29 20:35:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konrad Dybcio X-Patchwork-Id: 114445 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp9912381vqr; Thu, 29 Jun 2023 14:05:49 -0700 (PDT) X-Google-Smtp-Source: APBJJlHn9iFsrWQupRvrlQrSx1EPlsccViHiQzA+R0tqFyX/U75mH5lUC5b4WSpD6Rd5w+F0RgQm X-Received: by 2002:a17:902:c94f:b0:1ac:84dd:6d1f with SMTP id i15-20020a170902c94f00b001ac84dd6d1fmr369938pla.1.1688072749605; Thu, 29 Jun 2023 14:05:49 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1688072749; cv=none; d=google.com; s=arc-20160816; b=PHvHOQx8vNkHHqyEA0zG+iagae+Q+tSbDO5ltqA9U467FCigsBdt9gzskWZ3+h11qW WqSzIvyTTcqDTt+xmZzbwpNPrPFeZl/muOvO6EwnkPfNhMY/RPXgSplHoHEORApVhtsp OfZnF+P6WnSZzZZKs7S8rIwT1GWYSh92+KQwJfvboFYVZvmHXcSm+b+XjWY1DhUtKHMT 61NPOdGLhAcfiJCU1ROQj9BoKw3Nc4+Lv+UkFAZ2wCYDT8nNbBT70j7kobY0asjIQvnV r8iWQ74HdNlD1fH4O6X0m1iY//hI8GDxTVGPJf4ws1rC+veUj2olM/v9673jtw/n3SmS rsEw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=78qKnLJsNPm4roROV2WGW5c+8kMl5RLkTh9XlFlH21k=; fh=qvdqMbXAE/qcPdFiL/QUg6KLKapmCEtGXJzQKn2xN9U=; b=el6WTK6TE0MDYWjOG1XXFjEThnepQqBHMcpPPPtbtx/GaZXPIKMow6xououPN8wVPX utRVtsvTBNbwalz6Lz9O56IkRljMJnWogvhZ7Om+/3l0pR1h0TGkstph5OX7vvRrakPQ GBsYS2hVKmuTOaRdysFTkB9bHumUHsUGceJQZARSZF5cG2C4V5PP0IeTxjmdFu7eobsA ZsmeEJPJgPIPkUyoPN1786p8DdrU5GZJ4SfiiwyeDjKZ5AWZep7zbR//G/LeKemSG92m 4SXj/2OHDvNCXKMnpXGl8WlA4n1zMyzWfdRQCcoz/VCEtwuZiHA4mUaxMIQj7AgJo/UV riCQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=JXSKL36Q; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id k9-20020a170902760900b001b25e9a76d7si10255335pll.316.2023.06.29.14.05.36; Thu, 29 Jun 2023 14:05:49 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=JXSKL36Q; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231691AbjF2UgB (ORCPT + 99 others); Thu, 29 Jun 2023 16:36:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230079AbjF2Ufy (ORCPT ); Thu, 29 Jun 2023 16:35:54 -0400 Received: from mail-lj1-x22f.google.com (mail-lj1-x22f.google.com [IPv6:2a00:1450:4864:20::22f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DCBA30C4 for ; Thu, 29 Jun 2023 13:35:53 -0700 (PDT) Received: by mail-lj1-x22f.google.com with SMTP id 38308e7fff4ca-2b6985de215so18601541fa.2 for ; Thu, 29 Jun 2023 13:35:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1688070951; x=1690662951; 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=78qKnLJsNPm4roROV2WGW5c+8kMl5RLkTh9XlFlH21k=; b=JXSKL36QI/i4HBF+i46JoZgRfI6BsQeag+0MxuQJ7IIqIOtcWKatyxQ4Jj03Bh6JDj CFDq0PbbadZJ6VTfwShXyPKuV/mOtR+P61gCj2Y3dmxlpq/T0ZtS9dZ+tu4kliUuIMNY VEdBKGZOGTN8FjyLpIzOWNRuSf+eUgZtpw4CXf00DaiOX8Ch758ReQ2IqfunN0LP1apz Vi8tuy5dTiyAnZTXPMCwtDLGMDws+Zk79RQAVCjmxQHWdlj7A9hsD6sifKYPo0ia6tiq qD6ENKAYCuCc8bgQtCuFD7mEoa0jZn5xbciCyQx2okYJUqtvMzkkWCnofg4JilZvaS/q 30fA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1688070951; x=1690662951; 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=78qKnLJsNPm4roROV2WGW5c+8kMl5RLkTh9XlFlH21k=; b=ChKoAeBxXQtpkt+jjfAw7bK1EYI+h9SOHqXQa2yKP55GtwuvhgxRdB469yAXUn6Zky U4MIjpW/xEacr2IZNczdc+0e1lXe0BTpHp73H4U05KpYUPYKnzCSadwy1X0z/i6ipG5G Z7KfmLn0s/fnULNjRU4ILEW6uWGxluR1nE8hKMhukhbXicask+mZC/d6wzJ5TQaXc1sL +TZ3Zz3cdDTiEKFLXGDTeNTEW1NWBC7eU5rZyrKAqXdiIdEEBig5yuUsEfik44ndnxur Dwof3WJ8x2i/muwEj3LFL1khURwwr+KUBv1L34YKu7R2dQL2PBIIl6ARM2lBFkroB/GP TsNw== X-Gm-Message-State: ABy/qLal6yGub9xnPZ4aHh5wTZ8EDKuX7YqTFiad52emOShFe0bmcm6e wqtwfidY7DxV08JzWROZyR39PA== X-Received: by 2002:a2e:8215:0:b0:2b6:cf64:7a8e with SMTP id w21-20020a2e8215000000b002b6cf647a8emr290113ljg.19.1688070951582; Thu, 29 Jun 2023 13:35:51 -0700 (PDT) Received: from [192.168.1.101] (abyk82.neoplus.adsl.tpnet.pl. [83.9.30.82]) by smtp.gmail.com with ESMTPSA id k3-20020a2e2403000000b002b6b849c894sm1136008ljk.111.2023.06.29.13.35.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Jun 2023 13:35:51 -0700 (PDT) From: Konrad Dybcio Date: Thu, 29 Jun 2023 22:35:42 +0200 Subject: [PATCH v2 2/4] regulator: Introduce Qualcomm REFGEN regulator driver MIME-Version: 1.0 Message-Id: <20230628-topic-refgen-v2-2-6136487c78c5@linaro.org> References: <20230628-topic-refgen-v2-0-6136487c78c5@linaro.org> In-Reply-To: <20230628-topic-refgen-v2-0-6136487c78c5@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=1688070946; l=6725; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=9J+G1r4h/EMnhrwYXmB1C+J6Eslvg/Etw+wK9dwKeMQ=; b=luzseCDHJnUJW71XyhNDp+tGF6TUrtrtFpoYlc1+41Xmjwzz5MqqByqSYOl3JomQKIzXtbwdX zx2dIqR9O67A+s8fIQJRINb+zToRC5+wE+DXPPHQkcNqlXA+MOAP900 X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1770072571879760665?= X-GMAIL-MSGID: =?utf-8?q?1770072571879760665?= 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 | 10 ++ drivers/regulator/Makefile | 1 + drivers/regulator/qcom-refgen-regulator.c | 154 ++++++++++++++++++++++++++++++ 3 files changed, 165 insertions(+) diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 2c2405024ace..ea5549d62825 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -978,6 +978,16 @@ 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 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 ebfa75379c20..a044ad20e202 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -107,6 +107,7 @@ 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..4c442fa3f552 --- /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 = &(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 = &(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");