[V9,4/6] regulator: Add a regulator driver for the PM8008 PMIC

Message ID	1649166633-25872-5-git-send-email-quic_c_skakit@quicinc.com (mailing list archive)
State	Superseded
Headers	show Return-Path: <linux-arm-msm-owner@kernel.org> From: Satya Priya <quic_c_skakit@quicinc.com> To: Bjorn Andersson <bjorn.andersson@linaro.org>, Rob Herring <robh+dt@kernel.org> CC: Lee Jones <lee.jones@linaro.org>, Liam Girdwood <lgirdwood@gmail.com>, Mark Brown <broonie@kernel.org>, <linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <swboyd@chromium.org>, <quic_collinsd@quicinc.com>, <quic_subbaram@quicinc.com>, <quic_jprakash@quicinc.com>, Satya Priya <quic_c_skakit@quicinc.com> Subject: [PATCH V9 4/6] regulator: Add a regulator driver for the PM8008 PMIC Date: Tue, 5 Apr 2022 19:20:31 +0530 Message-ID: <1649166633-25872-5-git-send-email-quic_c_skakit@quicinc.com> In-Reply-To: <1649166633-25872-1-git-send-email-quic_c_skakit@quicinc.com> References: <1649166633-25872-1-git-send-email-quic_c_skakit@quicinc.com> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk
Series	Add Qualcomm Technologies, Inc. PM8008 regulator driver \| expand [V9,0/6] Add Qualcomm Technologies, Inc. PM8008 regulator driver [V9,1/6] dt-bindings: mfd: pm8008: Add reset-gpios [V9,2/6] dt-bindings: mfd: pm8008: Add pm8008 regulator bindings [V9,3/6] mfd: pm8008: Add mfd cell struct to register LDOs [V9,4/6] regulator: Add a regulator driver for the PM8008 PMIC [V9,5/6] arm64: dts: qcom: pm8008: Add base dts file [V9,6/6] arm64: dts: qcom: sc7280: Add pm8008 support for sc7280-idp

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 5ef2306..06b0a19 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -925,6 +925,15 @@ config REGULATOR_PWM This driver supports PWM controlled voltage regulators. PWM duty cycle can increase or decrease the voltage. +config REGULATOR_QCOM_PM8008 + tristate "Qualcomm Technologies, Inc. PM8008 PMIC regulators" + depends on MFD_QCOM_PM8008 + help + Select this option to get support for the voltage regulators + of Qualcomm Technologies, Inc. PM8008 PMIC chip. PM8008 has 7 LDO + regulators. This driver provides support for basic operations like + set/get voltage and enable/disable. + 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 1b64ad5..83eed71 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -101,6 +101,7 @@ 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-$(CONFIG_REGULATOR_QCOM_PM8008) += qcom-pm8008-regulator.o obj-$(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-pm8008-regulator.c b/drivers/regulator/qcom-pm8008-regulator.c new file mode 100644 index 0000000..0f6d5cb --- /dev/null +++ b/drivers/regulator/qcom-pm8008-regulator.c @@ -0,0 +1,205 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Copyright (c) 2022, The Linux Foundation. All rights reserved. */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> + +#define VSET_STEP_MV 8 +#define VSET_STEP_UV (VSET_STEP_MV * 1000) + +#define LDO_ENABLE_REG(base) ((base) + 0x46) +#define ENABLE_BIT BIT(7) + +#define LDO_VSET_LB_REG(base) ((base) + 0x40) + +#define LDO_STEPPER_CTL_REG(base) ((base) + 0x3b) +#define DEFAULT_VOLTAGE_STEPPER_RATE 38400 +#define STEP_RATE_MASK GENMASK(1, 0) + +struct pm8008_regulator_data { + const char *name; + const char *supply_name; + u16 base; + int min_uv; + int max_uv; + int min_dropout_uv; + const struct linear_range *voltage_range; +}; + +struct pm8008_regulator { + struct device *dev; + struct regmap *regmap; + struct regulator_desc rdesc; + u16 base; + int step_rate; +}; + +static const struct linear_range nldo_ranges[] = { + REGULATOR_LINEAR_RANGE(528000, 0, 122, 8000), +}; + +static const struct linear_range pldo_ranges[] = { + REGULATOR_LINEAR_RANGE(1504000, 0, 237, 8000), +}; + +static const struct pm8008_regulator_data reg_data[] = { + /* name parent base min_uv max_uv headroom_uv voltage_range */ + { "ldo1", "vdd_l1_l2", 0x4000, 528000, 1504000, 225000, nldo_ranges, }, + { "ldo2", "vdd_l1_l2", 0x4100, 528000, 1504000, 225000, nldo_ranges, }, + { "ldo3", "vdd_l3_l4", 0x4200, 1504000, 3400000, 300000, pldo_ranges, }, + { "ldo4", "vdd_l3_l4", 0x4300, 1504000, 3400000, 300000, pldo_ranges, }, + { "ldo5", "vdd_l5", 0x4400, 1504000, 3400000, 200000, pldo_ranges, }, + { "ldo6", "vdd_l6", 0x4500, 1504000, 3400000, 200000, pldo_ranges, }, + { "ldo7", "vdd_l7", 0x4600, 1504000, 3400000, 200000, pldo_ranges, }, +}; + +static int pm8008_regulator_get_voltage(struct regulator_dev *rdev) +{ + struct pm8008_regulator *pm8008_reg = rdev_get_drvdata(rdev); + __le16 mV; + int rc; + + rc = regmap_bulk_read(pm8008_reg->regmap, + LDO_VSET_LB_REG(pm8008_reg->base), (void *)&mV, 2); + if (rc < 0) { + dev_err(&rdev->dev, "failed to read regulator voltage rc=%d\n", rc); + return rc; + } + + return le16_to_cpu(mV) * 1000; +} + +static inline int pm8008_write_voltage(struct pm8008_regulator *pm8008_reg, + int mV) +{ + __le16 vset_raw; + + vset_raw = cpu_to_le16(mV); + + return regmap_bulk_write(pm8008_reg->regmap, + LDO_VSET_LB_REG(pm8008_reg->base), + (const void *)&vset_raw, sizeof(vset_raw)); +} + +static int pm8008_regulator_set_voltage_time(struct regulator_dev *rdev, + int old_uV, int new_uv) +{ + struct pm8008_regulator *pm8008_reg = rdev_get_drvdata(rdev); + + return DIV_ROUND_UP(abs(new_uv - old_uV), pm8008_reg->step_rate); +} + +static int pm8008_regulator_set_voltage(struct regulator_dev *rdev, + unsigned int selector) +{ + struct pm8008_regulator *pm8008_reg = rdev_get_drvdata(rdev); + int rc, mV; + + /* voltage control register is set with voltage in millivolts */ + mV = DIV_ROUND_UP(regulator_list_voltage_linear_range(rdev, selector), + 1000); + if (mV < 0) + return mV; + + rc = pm8008_write_voltage(pm8008_reg, mV); + if (rc < 0) + return rc; + + dev_dbg(&rdev->dev, "voltage set to %d\n", mV * 1000); + return 0; +} + +static const struct regulator_ops pm8008_regulator_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, + .set_voltage_sel = pm8008_regulator_set_voltage, + .get_voltage = pm8008_regulator_get_voltage, + .list_voltage = regulator_list_voltage_linear, + .set_voltage_time = pm8008_regulator_set_voltage_time, +}; + +static int pm8008_regulator_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct regulator_dev *rdev; + struct pm8008_regulator *pm8008_reg; + struct regmap *regmap; + struct regulator_config reg_config = {}; + int rc, i; + unsigned int reg; + + regmap = dev_get_regmap(dev->parent, NULL); + if (!regmap) { + dev_err(dev, "parent regmap is missing\n"); + return -EINVAL; + } + + for (i = 0; i < ARRAY_SIZE(reg_data); i++) { + pm8008_reg = devm_kzalloc(dev, sizeof(*pm8008_reg), GFP_KERNEL); + if (!pm8008_reg) + return -ENOMEM; + + pm8008_reg->regmap = regmap; + pm8008_reg->dev = dev; + pm8008_reg->base = reg_data[i].base; + + /* get slew rate */ + rc = regmap_bulk_read(pm8008_reg->regmap, + LDO_STEPPER_CTL_REG(pm8008_reg->base), &reg, 1); + if (rc < 0) { + dev_err(dev, "failed to read step rate configuration rc=%d\n", rc); + return rc; + } + reg &= STEP_RATE_MASK; + pm8008_reg->step_rate = DEFAULT_VOLTAGE_STEPPER_RATE >> reg; + + pm8008_reg->rdesc.type = REGULATOR_VOLTAGE; + pm8008_reg->rdesc.ops = &pm8008_regulator_ops; + pm8008_reg->rdesc.name = reg_data[i].name; + pm8008_reg->rdesc.supply_name = reg_data[i].supply_name; + pm8008_reg->rdesc.of_match = reg_data[i].name; + pm8008_reg->rdesc.uV_step = VSET_STEP_UV; + pm8008_reg->rdesc.min_uV = reg_data[i].min_uv; + pm8008_reg->rdesc.n_voltages + = ((reg_data[i].max_uv - reg_data[i].min_uv) + / pm8008_reg->rdesc.uV_step) + 1; + pm8008_reg->rdesc.linear_ranges = reg_data[i].voltage_range; + pm8008_reg->rdesc.n_linear_ranges = 1; + pm8008_reg->rdesc.enable_reg = LDO_ENABLE_REG(pm8008_reg->base); + pm8008_reg->rdesc.enable_mask = ENABLE_BIT; + pm8008_reg->rdesc.min_dropout_uV = reg_data[i].min_dropout_uv; + + reg_config.dev = dev->parent; + reg_config.driver_data = pm8008_reg; + + rdev = devm_regulator_register(dev, &pm8008_reg->rdesc, &reg_config); + if (IS_ERR(rdev)) { + rc = PTR_ERR(rdev); + dev_err(dev, "%s: failed to register regulator rc=%d\n", + reg_data[i].name, rc); + return rc; + } + } + + return 0; +} + +static struct platform_driver pm8008_regulator_driver = { + .driver = { + .name = "qcom,pm8008-regulators", + }, + .probe = pm8008_regulator_probe, +}; + +module_platform_driver(pm8008_regulator_driver); + +MODULE_DESCRIPTION("Qualcomm PM8008 PMIC Regulator Driver"); +MODULE_LICENSE("GPL");

[V9,4/6] regulator: Add a regulator driver for the PM8008 PMIC

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