From patchwork Tue Jun 7 05:52:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: cy_huang X-Patchwork-Id: 579681 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 D2E23C43334 for ; Tue, 7 Jun 2022 05:53:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236835AbiFGFxH (ORCPT ); Tue, 7 Jun 2022 01:53:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236836AbiFGFxE (ORCPT ); Tue, 7 Jun 2022 01:53:04 -0400 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 79657F5A7; Mon, 6 Jun 2022 22:53:02 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id 15so14602357pfy.3; Mon, 06 Jun 2022 22:53:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=625t4cW5KICrWZ1FMGyizibsP97+6FTdLC7BqDOyzpA=; b=jjDxRQr58t7wnqNURydrYfdIJaEUDd5lZLaYGVimIqNA6j/wh6AbHW68Y8pHqAEwiu OkpnsHdbFbmxSgD21VTd+HbIoIUbdTPeCgrnMhiLret0qbmSHwBUIMCke/tGXvNCu6jG VdQwzz1hyGtxhR4ewi3ju+H7j4a4G1zPb9Vpq3adbUAT/zy8UUDprZV6ZML6sA0NunVR yFBsz/9kAugGooOnBoPEAeI16ngPyQfSnUuGTIERoZLWi+gGwi9NMJUE5IMCta+rX+YW NQLOOs2/6H+DYK//5libXa78GuI1fie7wS7yr3mPO/OFqxiIqiV1g0F/yqJGmb8Xd4BX UrfQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=625t4cW5KICrWZ1FMGyizibsP97+6FTdLC7BqDOyzpA=; b=Zz4EEt5mCO7LeTTmYL2BGmc+za5i2z81Z/NCbG8b7jsq8sZJL1so/pgR1Obfyja9sz zL9Ce6NZK+ntjy3DaN3z6tDO4qYohHVSp/hJa2u6uSE3jBTorfGZEv55oyOX1Atgxg6f IEzZBh+xFGzmyEZZYssjcEL/79ils69ludJwKvN+foMa4bBLEKYBLcqTF2mR2utJJ80h Crq0IaiK4I8yHagWHiHRwO/WbYrbccpGwtSGZY53cE14Q3r1bnCLx+ErWl8sExutW2w4 j6f1Z9Vi5F3wvA16u974SzV1sVKXUnud5PinsDUDGpFv1F1oLnsp3QVdiaRk2UAeJ+cp 6XmQ== X-Gm-Message-State: AOAM532tF9dba5tKGCNXqBNONglIy9sf0JcCmQgF9ff0xap+lR3xr+q2 RN6LNbHsyra34hN2/+VpiVNumfWqOXs= X-Google-Smtp-Source: ABdhPJwoyilFWHFaVRzn3aJE1xbfZxmCqwRp3Cx/M7RenF0yfefxSRx/huOfnLDGVGtJBXesDU3EhQ== X-Received: by 2002:a63:b57:0:b0:3fb:a948:6d96 with SMTP id a23-20020a630b57000000b003fba9486d96mr23893027pgl.596.1654581181823; Mon, 06 Jun 2022 22:53:01 -0700 (PDT) Received: from localhost.localdomain ([49.216.54.77]) by smtp.gmail.com with ESMTPSA id z41-20020a056a001da900b0051b62689ec2sm9203520pfw.129.2022.06.06.22.52.58 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 06 Jun 2022 22:53:01 -0700 (PDT) From: cy_huang To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, lee.jones@linaro.org, broonie@kernel.org, dmitry.torokhov@gmail.com Cc: lgirdwood@gmail.com, cy_huang@richtek.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-input@vger.kernel.org Subject: [PATCH 3/4] regulator: rt5120: Add PMIC regulator support Date: Tue, 7 Jun 2022 13:52:40 +0800 Message-Id: <1654581161-12349-4-git-send-email-u0084500@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1654581161-12349-1-git-send-email-u0084500@gmail.com> References: <1654581161-12349-1-git-send-email-u0084500@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: ChiYuan Huang Add RT5120 PMIC regulator support. It integrates 4 buck convertes, 1 LDO voltage regulator, 1 external enable signal to control the external power source. Signed-off-by: ChiYuan Huang --- drivers/regulator/Kconfig | 10 + drivers/regulator/Makefile | 1 + drivers/regulator/rt5120-regulator.c | 417 +++++++++++++++++++++++++++++++++++ 3 files changed, 428 insertions(+) create mode 100644 drivers/regulator/rt5120-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 5ef2306..76039d5 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -1047,6 +1047,16 @@ config REGULATOR_RT5033 RT5033 PMIC. The device supports multiple regulators like current source, LDO and Buck. +config REGULATOR_RT5120 + tristate "Richtek RT5120 PMIC Regulators" + depends on MFD_RT5120 + help + This adds support for voltage regulator in Richtek RT5120 PMIC. + It integrates 4 channels buck controller, 1 channel LDO, 1 EXTEN + to control external power source. Only BUCK1 is adjustable from + 600mV to 1395mV, per step 6.250mV. The others are all fixed voltage + by external hardware circuit. + config REGULATOR_RT5190A tristate "Richtek RT5190A PMIC" depends on I2C diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 1b64ad5..32fce42 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -126,6 +126,7 @@ obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o +obj-$(CONFIG_REGULATOR_RT5120) += rt5120-regulator.o obj-$(CONFIG_REGULATOR_RT5190A) += rt5190a-regulator.o obj-$(CONFIG_REGULATOR_RT6160) += rt6160-regulator.o obj-$(CONFIG_REGULATOR_RT6245) += rt6245-regulator.o diff --git a/drivers/regulator/rt5120-regulator.c b/drivers/regulator/rt5120-regulator.c new file mode 100644 index 00000000..c786564 --- /dev/null +++ b/drivers/regulator/rt5120-regulator.c @@ -0,0 +1,417 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RT5120_REG_PGSTAT 0x03 +#define RT5120_REG_CH1VID 0x06 +#define RT5120_REG_CH1SLPVID 0x07 +#define RT5120_REG_ENABLE 0x08 +#define RT5120_REG_MODECTL 0x09 +#define RT5120_REG_UVOVPROT 0x0A +#define RT5120_REG_SLPCTL 0x0C +#define RT5120_REG_INTSTAT 0x1E +#define RT5120_REG_DISCHG 0x1F + +#define RT5120_OUTPG_MASK(rid) BIT(rid + 1) +#define RT5120_OUTUV_MASK(rid) BIT(rid + 9) +#define RT5120_OUTOV_MASK(rid) BIT(rid + 16) +#define RT5120_CH1VID_MASK GENMASK(6, 0) +#define RT5120_RIDEN_MASK(rid) BIT(rid + 1) +#define RT5120_RADEN_MASK(rid) BIT(rid) +#define RT5120_FPWM_MASK(rid) BIT(rid + 1) +#define RT5120_UVHICCUP_MASK BIT(1) +#define RT5120_OVHICCUP_MASK BIT(0) +#define RT5120_HOTDIE_MASK BIT(1) + +#define RT5120_BUCK1_MINUV 600000 +#define RT5120_BUCK1_MAXUV 1393750 +#define RT5120_BUCK1_STEPUV 6250 +#define RT5120_BUCK1_NUM_VOLT 0x80 + +#define RT5120_AUTO_MODE 0 +#define RT5120_FPWM_MODE 1 + +enum { + RT5120_REGULATOR_BUCK1 = 0, + RT5120_REGULATOR_BUCK2, + RT5120_REGULATOR_BUCK3, + RT5120_REGULATOR_BUCK4, + RT5120_REGULATOR_LDO, + RT5120_REGULATOR_EXTEN, + RT5120_MAX_REGULATOR +}; + +struct rt5120_priv { + struct device *dev; + struct regmap *regmap; + struct regulator_desc rdesc[RT5120_MAX_REGULATOR]; +}; + +static int rt5120_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + int rid = rdev_get_id(rdev); + unsigned int mask = RT5120_FPWM_MASK(rid), val; + + switch (mode) { + case REGULATOR_MODE_NORMAL: + val = 0; + break; + case REGULATOR_MODE_FAST: + val = RT5120_FPWM_MASK(rid); + break; + default: + return -EINVAL; + } + + return regmap_update_bits(regmap, RT5120_REG_MODECTL, mask, val); +} + +static unsigned int rt5120_buck_get_mode(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + int ret, rid = rdev_get_id(rdev); + unsigned int val; + + ret = regmap_read(regmap, RT5120_REG_MODECTL, &val); + if (ret) + return REGULATOR_MODE_INVALID; + + if (val & RT5120_FPWM_MASK(rid)) + return REGULATOR_MODE_FAST; + + return REGULATOR_MODE_NORMAL; +} + +static int rt5120_regulator_get_error_flags(struct regulator_dev *rdev, + unsigned int *flags) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int stat, hd_stat, cur_flags = 0; + int rid = rdev_get_id(rdev), ret; + + /* + * reg 0x03/0x04/0x05 to indicate PG/UV/OV + * use block read to descrease I/O xfer time + */ + ret = regmap_raw_read(regmap, RT5120_REG_PGSTAT, &stat, 3); + if (ret) + return ret; + + ret = regmap_read(regmap, RT5120_REG_INTSTAT, &hd_stat); + if (ret) + return ret; + + if (!(stat & RT5120_OUTPG_MASK(rid))) { + if (stat & RT5120_OUTUV_MASK(rid)) + cur_flags |= REGULATOR_ERROR_UNDER_VOLTAGE; + + if (stat & RT5120_OUTOV_MASK(rid)) + cur_flags |= REGULATOR_ERROR_REGULATION_OUT; + } + + if (hd_stat & RT5120_HOTDIE_MASK) + cur_flags |= REGULATOR_ERROR_OVER_TEMP; + + *flags = cur_flags; + return 0; +} + +static int rt5120_buck1_set_suspend_voltage(struct regulator_dev *rdev, int uV) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + int sel; + + if (uV < RT5120_BUCK1_MINUV || uV > RT5120_BUCK1_MAXUV) + return -EINVAL; + + sel = (uV - RT5120_BUCK1_MINUV) / RT5120_BUCK1_STEPUV; + return regmap_write(regmap, RT5120_REG_CH1SLPVID, sel); +} + +static int rt5120_regulator_set_suspend_enable(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + int rid = rdev_get_id(rdev); + unsigned int mask = RT5120_RIDEN_MASK(rid); + + return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, mask); +} + +static int rt5120_regulator_set_suspend_disable(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + int rid = rdev_get_id(rdev); + unsigned int mask = RT5120_RIDEN_MASK(rid); + + return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, 0); +} + +static const struct regulator_ops rt5120_buck1_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .list_voltage = regulator_list_voltage_linear, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_active_discharge = regulator_set_active_discharge_regmap, + .set_mode = rt5120_buck_set_mode, + .get_mode = rt5120_buck_get_mode, + .get_error_flags = rt5120_regulator_get_error_flags, + .set_suspend_voltage = rt5120_buck1_set_suspend_voltage, + .set_suspend_enable = rt5120_regulator_set_suspend_enable, + .set_suspend_disable = rt5120_regulator_set_suspend_disable, +}; + +static const struct regulator_ops rt5120_buck234_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_active_discharge = regulator_set_active_discharge_regmap, + .set_mode = rt5120_buck_set_mode, + .get_mode = rt5120_buck_get_mode, + .get_error_flags = rt5120_regulator_get_error_flags, + .set_suspend_enable = rt5120_regulator_set_suspend_enable, + .set_suspend_disable = rt5120_regulator_set_suspend_disable, +}; + +static const struct regulator_ops rt5120_ldo_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_active_discharge = regulator_set_active_discharge_regmap, + .get_error_flags = rt5120_regulator_get_error_flags, + .set_suspend_enable = rt5120_regulator_set_suspend_enable, + .set_suspend_disable = rt5120_regulator_set_suspend_disable, +}; + +static const struct regulator_ops rt5120_exten_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_suspend_enable = rt5120_regulator_set_suspend_enable, + .set_suspend_disable = rt5120_regulator_set_suspend_disable, +}; + +static unsigned int rt5120_buck_of_map_mode(unsigned int mode) +{ + switch (mode) { + case RT5120_AUTO_MODE: + return REGULATOR_MODE_NORMAL; + case RT5120_FPWM_MODE: + return REGULATOR_MODE_FAST; + default: + return REGULATOR_MODE_INVALID; + } +} + +static void rt5120_fillin_regulator_desc(struct regulator_desc *desc, int rid) +{ + static const char * const name[] = { "buck1", "buck2", "buck3", "buck4", + "ldo", "exten" }; + static const char * const sname[] = { "vin1", "vin2", "vin3", "vin4", + "vinldo", NULL }; + + desc->name = name[rid]; + desc->supply_name = sname[rid]; + desc->owner = THIS_MODULE; + desc->type = REGULATOR_VOLTAGE; + desc->id = rid; + desc->enable_reg = RT5120_REG_ENABLE; + desc->enable_mask = RT5120_RIDEN_MASK(rid); + desc->active_discharge_reg = RT5120_REG_DISCHG; + desc->active_discharge_mask = RT5120_RADEN_MASK(rid); + desc->active_discharge_on = RT5120_RADEN_MASK(rid); + + switch (rid) { + case RT5120_REGULATOR_BUCK1: + desc->of_map_mode = rt5120_buck_of_map_mode; + desc->min_uV = RT5120_BUCK1_MINUV; + desc->uV_step = RT5120_BUCK1_STEPUV; + desc->n_voltages = RT5120_BUCK1_NUM_VOLT; + desc->vsel_reg = RT5120_REG_CH1VID, + desc->vsel_mask = RT5120_CH1VID_MASK, + desc->ops = &rt5120_buck1_ops; + break; + case RT5120_REGULATOR_BUCK2 ... RT5120_REGULATOR_BUCK4: + desc->of_map_mode = rt5120_buck_of_map_mode; + desc->n_voltages = 1; + desc->ops = &rt5120_buck234_ops; + break; + case RT5120_REGULATOR_LDO: + desc->n_voltages = 1; + desc->ops = &rt5120_ldo_ops; + break; + default: + desc->n_voltages = 1; + desc->ops = &rt5120_exten_ops; + break; + } +} + +static int rt5120_of_parse_cb(struct rt5120_priv *priv, int rid, + struct of_regulator_match *match) +{ + struct regulator_desc *desc = priv->rdesc + rid; + struct regulator_init_data *init_data = match->init_data; + + if (!init_data || rid == RT5120_REGULATOR_BUCK1) + return 0; + + if (init_data->constraints.min_uV != init_data->constraints.max_uV) { + dev_err(priv->dev, "Variable voltage for fixed regulator\n"); + return -EINVAL; + } + + desc->fixed_uV = init_data->constraints.min_uV; + init_data->constraints.apply_uV = 0; + return 0; +} + +static struct of_regulator_match rt5120_regu_match[RT5120_MAX_REGULATOR] = { + [RT5120_REGULATOR_BUCK1] = { .name = "buck1", }, + [RT5120_REGULATOR_BUCK2] = { .name = "buck2", }, + [RT5120_REGULATOR_BUCK3] = { .name = "buck3", }, + [RT5120_REGULATOR_BUCK4] = { .name = "buck4", }, + [RT5120_REGULATOR_LDO] = { .name = "ldo", }, + [RT5120_REGULATOR_EXTEN] = { .name = "exten", } +}; + +static int rt5120_parse_regulator_dt_data(struct rt5120_priv *priv) +{ + struct device *dev = priv->dev->parent; + struct device_node *reg_node; + int i, ret; + + for (i = 0; i < RT5120_MAX_REGULATOR; i++) { + rt5120_fillin_regulator_desc(priv->rdesc + i, i); + + rt5120_regu_match[i].desc = priv->rdesc + i; + } + + reg_node = of_get_child_by_name(dev->of_node, "regulators"); + if (!reg_node) { + dev_err(priv->dev, "Couldn't find 'regulators' node\n"); + return -ENODEV; + } + + ret = of_regulator_match(priv->dev, reg_node, rt5120_regu_match, + ARRAY_SIZE(rt5120_regu_match)); + + of_node_put(reg_node); + + if (ret < 0) { + dev_err(priv->dev, + "Error parsing regulator init data (%d)\n", ret); + return ret; + } + + for (i = 0; i < RT5120_MAX_REGULATOR; i++) { + ret = rt5120_of_parse_cb(priv, i, rt5120_regu_match + i); + if (ret) { + dev_err(priv->dev, "Failed in [%d] of_passe_cb\n", i); + return ret; + } + } + + return 0; +} + +static int rt5120_device_property_init(struct rt5120_priv *priv) +{ + struct device *dev = priv->dev->parent; + bool prot_enable; + unsigned int prot_enable_val = 0; + + /* Assign UV/OV HW protection behavior */ + prot_enable = device_property_read_bool(dev, + "richtek,enable-undervolt-hiccup"); + if (prot_enable) + prot_enable_val |= RT5120_UVHICCUP_MASK; + + prot_enable = device_property_read_bool(dev, + "richtek,enable-overvolt-hiccup"); + if (prot_enable) + prot_enable_val |= RT5120_OVHICCUP_MASK; + + return regmap_update_bits(priv->regmap, RT5120_REG_UVOVPROT, + RT5120_UVHICCUP_MASK | RT5120_OVHICCUP_MASK, + prot_enable_val); +} + +static int rt5120_regulator_probe(struct platform_device *pdev) +{ + struct rt5120_priv *priv; + struct regulator_dev *rdev; + struct regulator_config config = {}; + int i, ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &pdev->dev; + + priv->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!priv->regmap) { + dev_err(&pdev->dev, "Failed to init regmap\n"); + return -ENODEV; + } + + ret = rt5120_device_property_init(priv); + if (ret) { + dev_err(&pdev->dev, "Failed to do property init\n"); + return ret; + } + + ret = rt5120_parse_regulator_dt_data(priv); + if (ret) { + dev_err(&pdev->dev, "Failed to parse dt data\n"); + return ret; + } + + config.dev = &pdev->dev; + config.regmap = priv->regmap; + + for (i = 0; i < RT5120_MAX_REGULATOR; i++) { + config.of_node = rt5120_regu_match[i].of_node; + config.init_data = rt5120_regu_match[i].init_data; + + rdev = devm_regulator_register(&pdev->dev, priv->rdesc + i, + &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, + "Failed to register regulator [%d]\n", i); + return PTR_ERR(rdev); + } + } + + return 0; +} + +static const struct platform_device_id rt5120_regulator_dev_table[] = { + { "rt5120-regulator", 0 }, + {} +}; +MODULE_DEVICE_TABLE(platform, rt5120_regulator_dev_table); + +static struct platform_driver rt5120_regulator_driver = { + .driver = { + .name = "rt5120-regulator", + }, + .id_table = rt5120_regulator_dev_table, + .probe = rt5120_regulator_probe, +}; +module_platform_driver(rt5120_regulator_driver); + +MODULE_AUTHOR("ChiYuan Huang "); +MODULE_DESCRIPTION("Richtek RT5120 regulator driver"); +MODULE_LICENSE("GPL v2");