[v5,4/8] regulator: stpmic1: add stpmic1 regulator driver

Message ID	1540830122-2577-5-git-send-email-p.paillet@st.com (mailing list archive)
State	Superseded
Headers	show Return-Path: <linux-input-owner@kernel.org> From: Pascal PAILLET-LME <p.paillet@st.com> To: "dmitry.torokhov@gmail.com" <dmitry.torokhov@gmail.com>, "robh+dt@kernel.org" <robh+dt@kernel.org>, "mark.rutland@arm.com" <mark.rutland@arm.com>, "lee.jones@linaro.org" <lee.jones@linaro.org>, "lgirdwood@gmail.com" <lgirdwood@gmail.com>, "broonie@kernel.org" <broonie@kernel.org>, "wim@linux-watchdog.org" <wim@linux-watchdog.org>, "linux@roeck-us.net" <linux@roeck-us.net>, "linux-input@vger.kernel.org" <linux-input@vger.kernel.org>, "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-watchdog@vger.kernel.org" <linux-watchdog@vger.kernel.org>, "benjamin.gaignard@linaro.org" <benjamin.gaignard@linaro.org>, "eballetbo@gmail.com" <eballetbo@gmail.com>, "axel.lin@ingics.com" <axel.lin@ingics.com> CC: Pascal PAILLET-LME <p.paillet@st.com> Subject: [PATCH v5 4/8] regulator: stpmic1: add stpmic1 regulator driver Thread-Topic: [PATCH v5 4/8] regulator: stpmic1: add stpmic1 regulator driver Thread-Index: AQHUb6OIkiQKv8UpXkyTeZLPBxynKw== Date: Mon, 29 Oct 2018 16:22:06 +0000 Message-ID: <1540830122-2577-5-git-send-email-p.paillet@st.com> References: <1540830122-2577-1-git-send-email-p.paillet@st.com> In-Reply-To: <1540830122-2577-1-git-send-email-p.paillet@st.com> Accept-Language: en-US Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk
Series	Introduce STPMIC1 PMIC Driver \| expand [v5,0/8] Introduce STPMIC1 PMIC Driver [v5,1/8] dt-bindings: mfd: document stpmic1 [v5,2/8] mfd: stpmic1: add stpmic1 driver [v5,3/8] dt-bindings: regulator: document stpmic1 pmic regulators [v5,4/8] regulator: stpmic1: add stpmic1 regulator driver [v5,5/8] dt-bindings: input: document stpmic1 pmic onkey [v5,6/8] input: stpmic1: add stpmic1 onkey driver [v5,7/8] dt-bindings: watchdog: document stpmic1 pmic watchdog [v5,8/8] watchdog: stpmic1: add stpmic1 watchdog driver

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 6e96ef1..026d480 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -803,6 +803,18 @@ config REGULATOR_STM32_VREFBUF This driver can also be built as a module. If so, the module will be called stm32-vrefbuf. +config REGULATOR_STPMIC1 + tristate "STMicroelectronics STPMIC1 PMIC Regulators" + depends on MFD_STPMIC1 + help + This driver supports STMicroelectronics STPMIC1 PMIC voltage + regulators and switches. The STPMIC1 regulators supply power to + an application processor as well as to external system + peripherals such as DDR, Flash memories and system devices. + + To compile this driver as a module, choose M here: the + module will be called stpmic1_regulator. + config REGULATOR_TI_ABB tristate "TI Adaptive Body Bias on-chip LDO" depends on ARCH_OMAP diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index eac4d79..300bc4c 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -101,6 +101,7 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o obj-$(CONFIG_REGULATOR_SC2731) += sc2731-regulator.o obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o obj-$(CONFIG_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o +obj-$(CONFIG_REGULATOR_STPMIC1) += stpmic1_regulator.o obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o obj-$(CONFIG_REGULATOR_SY8106A) += sy8106a-regulator.o obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o diff --git a/drivers/regulator/stpmic1_regulator.c b/drivers/regulator/stpmic1_regulator.c new file mode 100644 index 0000000..c96edcd --- /dev/null +++ b/drivers/regulator/stpmic1_regulator.c @@ -0,0 +1,667 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) STMicroelectronics 2018 +// Author: Pascal Paillet <p.paillet@st.com> for STMicroelectronics. + +#include <linux/interrupt.h> +#include <linux/mfd/stpmic1.h> +#include <linux/module.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> + +#include <dt-bindings/mfd/st,stpmic1.h> + +/** + * stpmic1 regulator description + * @desc: regulator framework description + * @mask_reset_reg: mask reset register address + * @mask_reset_mask: mask rank and mask reset register mask + * @icc_reg: icc register address + * @icc_mask: icc register mask + */ +struct stpmic1_regulator_cfg { + struct regulator_desc desc; + u8 mask_reset_reg; + u8 mask_reset_mask; + u8 icc_reg; + u8 icc_mask; +}; + +/** + * stpmic1 regulator data: this structure is used as driver data + * @regul_id: regulator id + * @reg_node: DT node of regulator (unused on non-DT platforms) + * @cfg: stpmic specific regulator description + * @regmap: point to parent regmap structure + */ +struct stpmic1_regulator { + unsigned int regul_id; + struct device_node *reg_node; + struct stpmic1_regulator_cfg *cfg; + struct regmap *regmap; +}; + +static int stpmic1_set_mode(struct regulator_dev *rdev, unsigned int mode); +static unsigned int stpmic1_get_mode(struct regulator_dev *rdev); +static int stpmic1_set_icc(struct regulator_dev *rdev); +static unsigned int stpmic1_map_mode(unsigned int mode); + +enum { + STPMIC1_BUCK1 = 0, + STPMIC1_BUCK2 = 1, + STPMIC1_BUCK3 = 2, + STPMIC1_BUCK4 = 3, + STPMIC1_LDO1 = 4, + STPMIC1_LDO2 = 5, + STPMIC1_LDO3 = 6, + STPMIC1_LDO4 = 7, + STPMIC1_LDO5 = 8, + STPMIC1_LDO6 = 9, + STPMIC1_VREF_DDR = 10, + STPMIC1_BOOST = 11, + STPMIC1_VBUS_OTG = 12, + STPMIC1_SW_OUT = 13, +}; + +/* Enable time worst case is 5000mV/(2250uV/uS) */ +#define PMIC_ENABLE_TIME_US 2200 + +struct regulator_linear_range buck1_ranges[] = { + REGULATOR_LINEAR_RANGE(600000, 0, 30, 25000), + REGULATOR_LINEAR_RANGE(1350000, 31, 63, 0), +}; + +struct regulator_linear_range buck2_ranges[] = { + REGULATOR_LINEAR_RANGE(1000000, 0, 17, 0), + REGULATOR_LINEAR_RANGE(1050000, 18, 19, 0), + REGULATOR_LINEAR_RANGE(1100000, 20, 21, 0), + REGULATOR_LINEAR_RANGE(1150000, 22, 23, 0), + REGULATOR_LINEAR_RANGE(1200000, 24, 25, 0), + REGULATOR_LINEAR_RANGE(1250000, 26, 27, 0), + REGULATOR_LINEAR_RANGE(1300000, 28, 29, 0), + REGULATOR_LINEAR_RANGE(1350000, 30, 31, 0), + REGULATOR_LINEAR_RANGE(1400000, 32, 33, 0), + REGULATOR_LINEAR_RANGE(1450000, 34, 35, 0), + REGULATOR_LINEAR_RANGE(1500000, 36, 63, 0), +}; + +struct regulator_linear_range buck3_ranges[] = { + REGULATOR_LINEAR_RANGE(1000000, 0, 19, 0), + REGULATOR_LINEAR_RANGE(1100000, 20, 23, 0), + REGULATOR_LINEAR_RANGE(1200000, 24, 27, 0), + REGULATOR_LINEAR_RANGE(1300000, 28, 31, 0), + REGULATOR_LINEAR_RANGE(1400000, 32, 35, 0), + REGULATOR_LINEAR_RANGE(1500000, 36, 55, 100000), + REGULATOR_LINEAR_RANGE(3400000, 56, 63, 0), +}; + +struct regulator_linear_range buck4_ranges[] = { + REGULATOR_LINEAR_RANGE(600000, 0, 27, 25000), + REGULATOR_LINEAR_RANGE(1300000, 28, 29, 0), + REGULATOR_LINEAR_RANGE(1350000, 30, 31, 0), + REGULATOR_LINEAR_RANGE(1400000, 32, 33, 0), + REGULATOR_LINEAR_RANGE(1450000, 34, 35, 0), + REGULATOR_LINEAR_RANGE(1500000, 36, 60, 100000), + REGULATOR_LINEAR_RANGE(3900000, 61, 63, 0), +}; + +struct regulator_linear_range ldo1_ranges[] = { + REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0), + REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000), + REGULATOR_LINEAR_RANGE(3300000, 25, 31, 0), +}; + +struct regulator_linear_range ldo2_ranges[] = { + REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0), + REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000), + REGULATOR_LINEAR_RANGE(3300000, 25, 30, 0), +}; + +struct regulator_linear_range ldo3_ranges[] = { + REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0), + REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000), + REGULATOR_LINEAR_RANGE(3300000, 25, 30, 0), + /* with index 31 LDO3 is in DDR mode */ + REGULATOR_LINEAR_RANGE(500000, 31, 31, 0), +}; + +struct regulator_linear_range ldo5_ranges[] = { + REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0), + REGULATOR_LINEAR_RANGE(1700000, 8, 30, 100000), + REGULATOR_LINEAR_RANGE(3900000, 31, 31, 0), +}; + +struct regulator_linear_range ldo6_ranges[] = { + REGULATOR_LINEAR_RANGE(900000, 0, 24, 100000), + REGULATOR_LINEAR_RANGE(3300000, 25, 31, 0), +}; + +static struct regulator_ops stpmic1_ldo_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_pull_down = regulator_set_pull_down_regmap, + .set_over_current_protection = stpmic1_set_icc, +}; + +static struct regulator_ops stpmic1_ldo3_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_iterate, + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_pull_down = regulator_set_pull_down_regmap, + .get_bypass = regulator_get_bypass_regmap, + .set_bypass = regulator_set_bypass_regmap, + .set_over_current_protection = stpmic1_set_icc, +}; + +static struct regulator_ops stpmic1_ldo4_fixed_regul_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .set_pull_down = regulator_set_pull_down_regmap, + .set_over_current_protection = stpmic1_set_icc, +}; + +static struct regulator_ops stpmic1_buck_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_pull_down = regulator_set_pull_down_regmap, + .set_mode = stpmic1_set_mode, + .get_mode = stpmic1_get_mode, + .set_over_current_protection = stpmic1_set_icc, +}; + +static struct regulator_ops stpmic1_vref_ddr_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .set_pull_down = regulator_set_pull_down_regmap, +}; + +static struct regulator_ops stpmic1_boost_regul_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .set_over_current_protection = stpmic1_set_icc, +}; + +static struct regulator_ops stpmic1_switch_regul_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .set_over_current_protection = stpmic1_set_icc, + .set_active_discharge = regulator_set_active_discharge_regmap, +}; + +#define REG_LDO(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .n_voltages = 32, \ + .ops = &stpmic1_ldo_ops, \ + .linear_ranges = base ## _ranges, \ + .n_linear_ranges = ARRAY_SIZE(base ## _ranges), \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .vsel_reg = ids##_ACTIVE_CR, \ + .vsel_mask = LDO_VOLTAGE_MASK, \ + .enable_reg = ids##_ACTIVE_CR, \ + .enable_mask = LDO_ENABLE_MASK, \ + .enable_val = 1, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .pull_down_reg = ids##_PULL_DOWN_REG, \ + .pull_down_mask = ids##_PULL_DOWN_MASK, \ + .supply_name = #base, \ +} + +#define REG_LDO3(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .n_voltages = 32, \ + .ops = &stpmic1_ldo3_ops, \ + .linear_ranges = ldo3_ranges, \ + .n_linear_ranges = ARRAY_SIZE(ldo3_ranges), \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .vsel_reg = LDO3_ACTIVE_CR, \ + .vsel_mask = LDO_VOLTAGE_MASK, \ + .enable_reg = LDO3_ACTIVE_CR, \ + .enable_mask = LDO_ENABLE_MASK, \ + .enable_val = 1, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .bypass_reg = LDO3_ACTIVE_CR, \ + .bypass_mask = LDO_BYPASS_MASK, \ + .bypass_val_on = LDO_BYPASS_MASK, \ + .bypass_val_off = 0, \ + .pull_down_reg = ids##_PULL_DOWN_REG, \ + .pull_down_mask = ids##_PULL_DOWN_MASK, \ + .supply_name = #base, \ +} + +#define REG_LDO4(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .n_voltages = 1, \ + .ops = &stpmic1_ldo4_fixed_regul_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 3300000, \ + .fixed_uV = 3300000, \ + .enable_reg = LDO4_ACTIVE_CR, \ + .enable_mask = LDO_ENABLE_MASK, \ + .enable_val = 1, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .pull_down_reg = ids##_PULL_DOWN_REG, \ + .pull_down_mask = ids##_PULL_DOWN_MASK, \ + .supply_name = #base, \ +} + +#define REG_BUCK(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .ops = &stpmic1_buck_ops, \ + .n_voltages = 64, \ + .linear_ranges = base ## _ranges, \ + .n_linear_ranges = ARRAY_SIZE(base ## _ranges), \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .vsel_reg = ids##_ACTIVE_CR, \ + .vsel_mask = BUCK_VOLTAGE_MASK, \ + .enable_reg = ids##_ACTIVE_CR, \ + .enable_mask = BUCK_ENABLE_MASK, \ + .enable_val = 1, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .of_map_mode = stpmic1_map_mode, \ + .pull_down_reg = ids##_PULL_DOWN_REG, \ + .pull_down_mask = ids##_PULL_DOWN_MASK, \ + .supply_name = #base, \ +} + +#define REG_VREF_DDR(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .n_voltages = 1, \ + .ops = &stpmic1_vref_ddr_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 500000, \ + .fixed_uV = 500000, \ + .enable_reg = VREF_DDR_ACTIVE_CR, \ + .enable_mask = BUCK_ENABLE_MASK, \ + .enable_val = 1, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .pull_down_reg = ids##_PULL_DOWN_REG, \ + .pull_down_mask = ids##_PULL_DOWN_MASK, \ + .supply_name = #base, \ +} + +#define REG_BOOST(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .n_voltages = 1, \ + .ops = &stpmic1_boost_regul_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 0, \ + .fixed_uV = 5000000, \ + .enable_reg = BST_SW_CR, \ + .enable_mask = BOOST_ENABLED, \ + .enable_val = BOOST_ENABLED, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .supply_name = #base, \ +} + +#define REG_VBUS_OTG(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .n_voltages = 1, \ + .ops = &stpmic1_switch_regul_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 0, \ + .fixed_uV = 5000000, \ + .enable_reg = BST_SW_CR, \ + .enable_mask = USBSW_OTG_SWITCH_ENABLED, \ + .enable_val = USBSW_OTG_SWITCH_ENABLED, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .supply_name = #base, \ + .active_discharge_reg = BST_SW_CR, \ + .active_discharge_mask = VBUS_OTG_DISCHARGE, \ + .active_discharge_on = VBUS_OTG_DISCHARGE, \ +} + +#define REG_SW_OUT(ids, base) { \ + .name = #ids, \ + .id = STPMIC1_##ids, \ + .n_voltages = 1, \ + .ops = &stpmic1_switch_regul_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 0, \ + .fixed_uV = 5000000, \ + .enable_reg = BST_SW_CR, \ + .enable_mask = SWIN_SWOUT_ENABLED, \ + .enable_val = SWIN_SWOUT_ENABLED, \ + .disable_val = 0, \ + .enable_time = PMIC_ENABLE_TIME_US, \ + .supply_name = #base, \ + .active_discharge_reg = BST_SW_CR, \ + .active_discharge_mask = SW_OUT_DISCHARGE, \ + .active_discharge_on = SW_OUT_DISCHARGE, \ +} + +struct stpmic1_regulator_cfg stpmic1_regulator_cfgs[] = { + [STPMIC1_BUCK1] = { + .desc = REG_BUCK(BUCK1, buck1), + .icc_reg = BUCKS_ICCTO_CR, + .icc_mask = BIT(0), + .mask_reset_reg = BUCKS_MASK_RESET_CR, + .mask_reset_mask = BIT(0), + }, + [STPMIC1_BUCK2] = { + .desc = REG_BUCK(BUCK2, buck2), + .icc_reg = BUCKS_ICCTO_CR, + .icc_mask = BIT(1), + .mask_reset_reg = BUCKS_MASK_RESET_CR, + .mask_reset_mask = BIT(1), + }, + [STPMIC1_BUCK3] = { + .desc = REG_BUCK(BUCK3, buck3), + .icc_reg = BUCKS_ICCTO_CR, + .icc_mask = BIT(2), + .mask_reset_reg = BUCKS_MASK_RESET_CR, + .mask_reset_mask = BIT(2), + }, + [STPMIC1_BUCK4] = { + .desc = REG_BUCK(BUCK4, buck4), + .icc_reg = BUCKS_ICCTO_CR, + .icc_mask = BIT(3), + .mask_reset_reg = BUCKS_MASK_RESET_CR, + .mask_reset_mask = BIT(3), + }, + [STPMIC1_LDO1] = { + .desc = REG_LDO(LDO1, ldo1), + .icc_reg = LDOS_ICCTO_CR, + .icc_mask = BIT(0), + .mask_reset_reg = LDOS_MASK_RESET_CR, + .mask_reset_mask = BIT(0), + }, + [STPMIC1_LDO2] = { + .desc = REG_LDO(LDO2, ldo2), + .icc_reg = LDOS_ICCTO_CR, + .icc_mask = BIT(1), + .mask_reset_reg = LDOS_MASK_RESET_CR, + .mask_reset_mask = BIT(1), + }, + [STPMIC1_LDO3] = { + .desc = REG_LDO3(LDO3, ldo3), + .icc_reg = LDOS_ICCTO_CR, + .icc_mask = BIT(2), + .mask_reset_reg = LDOS_MASK_RESET_CR, + .mask_reset_mask = BIT(2), + }, + [STPMIC1_LDO4] = { + .desc = REG_LDO4(LDO4, ldo4), + .icc_reg = LDOS_ICCTO_CR, + .icc_mask = BIT(3), + .mask_reset_reg = LDOS_MASK_RESET_CR, + .mask_reset_mask = BIT(3), + }, + [STPMIC1_LDO5] = { + .desc = REG_LDO(LDO5, ldo5), + .icc_reg = LDOS_ICCTO_CR, + .icc_mask = BIT(4), + .mask_reset_reg = LDOS_MASK_RESET_CR, + .mask_reset_mask = BIT(4), + }, + [STPMIC1_LDO6] = { + .desc = REG_LDO(LDO6, ldo6), + .icc_reg = LDOS_ICCTO_CR, + .icc_mask = BIT(5), + .mask_reset_reg = LDOS_MASK_RESET_CR, + .mask_reset_mask = BIT(5), + }, + [STPMIC1_VREF_DDR] = { + .desc = REG_VREF_DDR(VREF_DDR, vref_ddr), + .mask_reset_reg = LDOS_MASK_RESET_CR, + .mask_reset_mask = BIT(6), + }, + [STPMIC1_BOOST] = { + .desc = REG_BOOST(BOOST, boost), + .icc_reg = BUCKS_ICCTO_CR, + .icc_mask = BIT(6), + }, + [STPMIC1_VBUS_OTG] = { + .desc = REG_VBUS_OTG(VBUS_OTG, pwr_sw1), + .icc_reg = BUCKS_ICCTO_CR, + .icc_mask = BIT(4), + }, + [STPMIC1_SW_OUT] = { + .desc = REG_SW_OUT(SW_OUT, pwr_sw2), + .icc_reg = BUCKS_ICCTO_CR, + .icc_mask = BIT(5), + }, +}; + +static unsigned int stpmic1_map_mode(unsigned int mode) +{ + switch (mode) { + case STPMIC1_BUCK_MODE_NORMAL: + return REGULATOR_MODE_NORMAL; + case STPMIC1_BUCK_MODE_LP: + return REGULATOR_MODE_STANDBY; + default: + return REGULATOR_MODE_INVALID; + } +} + +static unsigned int stpmic1_get_mode(struct regulator_dev *rdev) +{ + int value; + + regmap_read(rdev->regmap, rdev->desc->enable_reg, &value); + + if (value & STPMIC1_BUCK_MODE_LP) + return REGULATOR_MODE_STANDBY; + + return REGULATOR_MODE_NORMAL; +} + +static int stpmic1_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + int value; + + switch (mode) { + case REGULATOR_MODE_NORMAL: + value = STPMIC1_BUCK_MODE_NORMAL; + break; + case REGULATOR_MODE_STANDBY: + value = STPMIC1_BUCK_MODE_LP; + break; + default: + return -EINVAL; + } + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + STPMIC1_BUCK_MODE_LP, value); +} + +static int stpmic1_set_icc(struct regulator_dev *rdev) +{ + struct stpmic1_regulator *regul = rdev_get_drvdata(rdev); + + /* enable switch off in case of over current */ + return regmap_update_bits(regul->regmap, regul->cfg->icc_reg, + regul->cfg->icc_mask, regul->cfg->icc_mask); +} + +static irqreturn_t stpmic1_curlim_irq_handler(int irq, void *data) +{ + struct regulator_dev *rdev = (struct regulator_dev *)data; + + mutex_lock(&rdev->mutex); + + /* Send an overcurrent notification */ + regulator_notifier_call_chain(rdev, + REGULATOR_EVENT_OVER_CURRENT, + NULL); + + mutex_unlock(&rdev->mutex); + + return IRQ_HANDLED; +} + +#define MATCH(_name, _id) \ + [STPMIC1_##_id] = { \ + .name = #_name, \ + .desc = &stpmic1_regulator_cfgs[STPMIC1_##_id].desc, \ + } + +static struct of_regulator_match stpmic1_matches[] = { + MATCH(buck1, BUCK1), + MATCH(buck2, BUCK2), + MATCH(buck3, BUCK3), + MATCH(buck4, BUCK4), + MATCH(ldo1, LDO1), + MATCH(ldo2, LDO2), + MATCH(ldo3, LDO3), + MATCH(ldo4, LDO4), + MATCH(ldo5, LDO5), + MATCH(ldo6, LDO6), + MATCH(vref_ddr, VREF_DDR), + MATCH(boost, BOOST), + MATCH(pwr_sw1, VBUS_OTG), + MATCH(pwr_sw2, SW_OUT), +}; + +static int stpmic1_regulator_register(struct platform_device *pdev, int id, + struct of_regulator_match *match, + struct stpmic1_regulator *regul) +{ + struct stpmic1 *pmic_dev = dev_get_drvdata(pdev->dev.parent); + struct regulator_dev *rdev; + struct regulator_config config = {}; + int ret = 0; + int irq; + + config.dev = &pdev->dev; + config.init_data = match->init_data; + config.of_node = match->of_node; + config.regmap = pmic_dev->regmap; + config.driver_data = regul; + + regul->regul_id = id; + regul->reg_node = config.of_node; + regul->cfg = &stpmic1_regulator_cfgs[id]; + regul->regmap = pmic_dev->regmap; + + rdev = devm_regulator_register(&pdev->dev, &regul->cfg->desc, &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "failed to register %s regulator\n", + regul->cfg->desc.name); + return PTR_ERR(rdev); + } + + /* set mask reset */ + if (of_get_property(regul->reg_node, "st,mask-reset", NULL) && + regul->cfg->mask_reset_reg != 0) { + ret = regmap_update_bits(regul->regmap, + regul->cfg->mask_reset_reg, + regul->cfg->mask_reset_mask, + regul->cfg->mask_reset_mask); + if (ret) { + dev_err(&pdev->dev, "set mask reset failed\n"); + return ret; + } + } + + /* setup an irq handler for over-current detection */ + irq = of_irq_get(regul->reg_node, 0); + if (irq > 0) { + ret = devm_request_threaded_irq(&pdev->dev, + irq, NULL, + stpmic1_curlim_irq_handler, + IRQF_ONESHOT | IRQF_SHARED, + pdev->name, rdev); + if (ret) { + dev_err(&pdev->dev, "Request IRQ failed\n"); + return ret; + } + } + return 0; +} + +static int stpmic1_regulator_probe(struct platform_device *pdev) +{ + struct stpmic1_regulator *regul; + int i, ret; + + ret = of_regulator_match(&pdev->dev, pdev->dev.of_node, stpmic1_matches, + ARRAY_SIZE(stpmic1_matches)); + if (ret < 0) { + dev_err(&pdev->dev, + "Error in PMIC regulator device tree node"); + return ret; + } + + regul = devm_kzalloc(&pdev->dev, ARRAY_SIZE(stpmic1_regulator_cfgs) * + sizeof(struct stpmic1_regulator), + GFP_KERNEL); + if (!regul) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(stpmic1_regulator_cfgs); i++) { + ret = stpmic1_regulator_register(pdev, i, &stpmic1_matches[i], + regul); + if (ret < 0) + return ret; + regul++; + } + + dev_dbg(&pdev->dev, "stpmic1_regulator driver probed\n"); + + return 0; +} + +static const struct of_device_id of_pmic_regulator_match[] = { + { .compatible = "st,stpmic1-regulators" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, of_pmic_regulator_match); + +static struct platform_driver stpmic1_regulator_driver = { + .driver = { + .name = "stpmic1-regulator", + .of_match_table = of_match_ptr(of_pmic_regulator_match), + }, + .probe = stpmic1_regulator_probe, +}; + +module_platform_driver(stpmic1_regulator_driver); + +MODULE_DESCRIPTION("STPMIC1 PMIC voltage regulator driver"); +MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>"); +MODULE_LICENSE("GPL v2");

[v5,4/8] regulator: stpmic1: add stpmic1 regulator driver

Commit Message

Patch