diff options
| -rw-r--r-- | drivers/regulator/act8945a-regulator.c | 186 | ||||
| -rw-r--r-- | include/dt-bindings/regulator/active-semi,8945a-regulator.h | 30 |
2 files changed, 211 insertions, 5 deletions
diff --git a/drivers/regulator/act8945a-regulator.c b/drivers/regulator/act8945a-regulator.c index 8d71d9893d0d..f37d1a860407 100644 --- a/drivers/regulator/act8945a-regulator.c +++ b/drivers/regulator/act8945a-regulator.c @@ -18,6 +18,7 @@ #include <linux/regmap.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> +#include <dt-bindings/regulator/active-semi,8945a-regulator.h> /** * ACT8945A Global Register Map. @@ -28,20 +29,27 @@ #define ACT8945A_DCDC1_VSET1 0x20 #define ACT8945A_DCDC1_VSET2 0x21 #define ACT8945A_DCDC1_CTRL 0x22 +#define ACT8945A_DCDC1_SUS 0x24 #define ACT8945A_DCDC2_VSET1 0x30 #define ACT8945A_DCDC2_VSET2 0x31 #define ACT8945A_DCDC2_CTRL 0x32 +#define ACT8945A_DCDC2_SUS 0x34 #define ACT8945A_DCDC3_VSET1 0x40 #define ACT8945A_DCDC3_VSET2 0x41 #define ACT8945A_DCDC3_CTRL 0x42 +#define ACT8945A_DCDC3_SUS 0x44 #define ACT8945A_LDO1_VSET 0x50 #define ACT8945A_LDO1_CTRL 0x51 +#define ACT8945A_LDO1_SUS 0x52 #define ACT8945A_LDO2_VSET 0x54 #define ACT8945A_LDO2_CTRL 0x55 +#define ACT8945A_LDO2_SUS 0x56 #define ACT8945A_LDO3_VSET 0x60 #define ACT8945A_LDO3_CTRL 0x61 +#define ACT8945A_LDO3_SUS 0x62 #define ACT8945A_LDO4_VSET 0x64 #define ACT8945A_LDO4_CTRL 0x65 +#define ACT8945A_LDO4_SUS 0x66 /** * Field Definitions. @@ -62,7 +70,12 @@ enum { ACT8945A_ID_LDO2, ACT8945A_ID_LDO3, ACT8945A_ID_LDO4, - ACT8945A_REG_NUM, + ACT8945A_ID_MAX, +}; + +struct act8945a_pmic { + struct regmap *regmap; + u32 op_mode[ACT8945A_ID_MAX]; }; static const struct regulator_linear_range act8945a_voltage_ranges[] = { @@ -71,6 +84,143 @@ static const struct regulator_linear_range act8945a_voltage_ranges[] = { REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), }; +static int act8945a_set_suspend_state(struct regulator_dev *rdev, bool enable) +{ + struct regmap *regmap = rdev->regmap; + int id = rdev->desc->id, reg, val; + + switch (id) { + case ACT8945A_ID_DCDC1: + reg = ACT8945A_DCDC1_SUS; + val = 0xa8; + break; + case ACT8945A_ID_DCDC2: + reg = ACT8945A_DCDC2_SUS; + val = 0xa8; + break; + case ACT8945A_ID_DCDC3: + reg = ACT8945A_DCDC3_SUS; + val = 0xa8; + break; + case ACT8945A_ID_LDO1: + reg = ACT8945A_LDO1_SUS; + val = 0xe8; + break; + case ACT8945A_ID_LDO2: + reg = ACT8945A_LDO2_SUS; + val = 0xe8; + break; + case ACT8945A_ID_LDO3: + reg = ACT8945A_LDO3_SUS; + val = 0xe8; + break; + case ACT8945A_ID_LDO4: + reg = ACT8945A_LDO4_SUS; + val = 0xe8; + break; + default: + return -EINVAL; + } + + if (enable) + val |= BIT(4); + + /* + * Ask the PMIC to enable/disable this output when entering hibernate + * mode. + */ + return regmap_write(regmap, reg, val); +} + +static int act8945a_set_suspend_enable(struct regulator_dev *rdev) +{ + return act8945a_set_suspend_state(rdev, true); +} + +static int act8945a_set_suspend_disable(struct regulator_dev *rdev) +{ + return act8945a_set_suspend_state(rdev, false); +} + +static unsigned int act8945a_of_map_mode(unsigned int mode) +{ + switch (mode) { + case ACT8945A_REGULATOR_MODE_FIXED: + case ACT8945A_REGULATOR_MODE_NORMAL: + return REGULATOR_MODE_NORMAL; + case ACT8945A_REGULATOR_MODE_LOWPOWER: + return REGULATOR_MODE_STANDBY; + default: + return REGULATOR_MODE_INVALID; + } +} + +static int act8945a_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + struct act8945a_pmic *act8945a = rdev_get_drvdata(rdev); + struct regmap *regmap = rdev->regmap; + int id = rdev->desc->id; + int reg, ret, val = 0; + + switch (id) { + case ACT8945A_ID_DCDC1: + reg = ACT8945A_DCDC1_CTRL; + break; + case ACT8945A_ID_DCDC2: + reg = ACT8945A_DCDC2_CTRL; + break; + case ACT8945A_ID_DCDC3: + reg = ACT8945A_DCDC3_CTRL; + break; + case ACT8945A_ID_LDO1: + reg = ACT8945A_LDO1_SUS; + break; + case ACT8945A_ID_LDO2: + reg = ACT8945A_LDO2_SUS; + break; + case ACT8945A_ID_LDO3: + reg = ACT8945A_LDO3_SUS; + break; + case ACT8945A_ID_LDO4: + reg = ACT8945A_LDO4_SUS; + break; + default: + return -EINVAL; + } + + switch (mode) { + case REGULATOR_MODE_STANDBY: + if (rdev->desc->id > ACT8945A_ID_DCDC3) + val = BIT(5); + break; + case REGULATOR_MODE_NORMAL: + if (rdev->desc->id <= ACT8945A_ID_DCDC3) + val = BIT(5); + break; + default: + return -EINVAL; + } + + ret = regmap_update_bits(regmap, reg, BIT(5), val); + if (ret) + return ret; + + act8945a->op_mode[id] = mode; + + return 0; +} + +static unsigned int act8945a_get_mode(struct regulator_dev *rdev) +{ + struct act8945a_pmic *act8945a = rdev_get_drvdata(rdev); + int id = rdev->desc->id; + + if (id < ACT8945A_ID_DCDC1 || id >= ACT8945A_ID_MAX) + return -EINVAL; + + return act8945a->op_mode[id]; +} + static const struct regulator_ops act8945a_ops = { .list_voltage = regulator_list_voltage_linear_range, .map_voltage = regulator_map_voltage_linear_range, @@ -78,7 +228,11 @@ static const struct regulator_ops act8945a_ops = { .set_voltage_sel = regulator_set_voltage_sel_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, + .set_mode = act8945a_set_mode, + .get_mode = act8945a_get_mode, .is_enabled = regulator_is_enabled_regmap, + .set_suspend_enable = act8945a_set_suspend_enable, + .set_suspend_disable = act8945a_set_suspend_disable, }; #define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply) \ @@ -86,6 +240,7 @@ static const struct regulator_ops act8945a_ops = { .name = _name, \ .supply_name = _supply, \ .of_match = of_match_ptr("REG_"#_id), \ + .of_map_mode = act8945a_of_map_mode, \ .regulators_node = of_match_ptr("regulators"), \ .id = _family##_ID_##_id, \ .type = REGULATOR_VOLTAGE, \ @@ -124,13 +279,17 @@ static int act8945a_pmic_probe(struct platform_device *pdev) { struct regulator_config config = { }; const struct regulator_desc *regulators; + struct act8945a_pmic *act8945a; struct regulator_dev *rdev; - struct regmap *regmap; int i, num_regulators; bool voltage_select; - regmap = dev_get_regmap(pdev->dev.parent, NULL); - if (!regmap) { + act8945a = devm_kzalloc(&pdev->dev, sizeof(*act8945a), GFP_KERNEL); + if (!act8945a) + return -ENOMEM; + + act8945a->regmap = dev_get_regmap(pdev->dev.parent, NULL); + if (!act8945a->regmap) { dev_err(&pdev->dev, "could not retrieve regmap from parent device\n"); return -EINVAL; @@ -149,6 +308,7 @@ static int act8945a_pmic_probe(struct platform_device *pdev) config.dev = &pdev->dev; config.dev->of_node = pdev->dev.parent->of_node; + config.driver_data = act8945a; for (i = 0; i < num_regulators; i++) { rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config); if (IS_ERR(rdev)) { @@ -159,13 +319,29 @@ static int act8945a_pmic_probe(struct platform_device *pdev) } } + platform_set_drvdata(pdev, act8945a); + /* Unlock expert registers. */ - return regmap_write(regmap, ACT8945A_SYS_UNLK_REGS, 0xef); + return regmap_write(act8945a->regmap, ACT8945A_SYS_UNLK_REGS, 0xef); } +static int act8945a_suspend(struct device *pdev) +{ + struct act8945a_pmic *act8945a = dev_get_drvdata(pdev); + + /* + * Ask the PMIC to enter the suspend mode on the next PWRHLD + * transition. + */ + return regmap_write(act8945a->regmap, ACT8945A_SYS_CTRL, 0x42); +} + +SIMPLE_DEV_PM_OPS(act8945a_pm, act8945a_suspend, NULL); + static struct platform_driver act8945a_pmic_driver = { .driver = { .name = "act8945a-regulator", + .pm = &act8945a_pm, }, .probe = act8945a_pmic_probe, }; diff --git a/include/dt-bindings/regulator/active-semi,8945a-regulator.h b/include/dt-bindings/regulator/active-semi,8945a-regulator.h new file mode 100644 index 000000000000..9bdba5e3141a --- /dev/null +++ b/include/dt-bindings/regulator/active-semi,8945a-regulator.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018 Microchip Technology, Inc. All rights reserved. + * + * Device Tree binding constants for the ACT8945A PMIC regulators + */ + +#ifndef _DT_BINDINGS_REGULATOR_ACT8945A_H +#define _DT_BINDINGS_REGULATOR_ACT8945A_H + +/* + * These constants should be used to specify regulator modes in device tree for + * ACT8945A regulators as follows: + * ACT8945A_REGULATOR_MODE_FIXED: It is specific to DCDC regulators and it + * specifies the usage of fixed-frequency + * PWM. + * + * ACT8945A_REGULATOR_MODE_NORMAL: It is specific to LDO regulators and it + * specifies the usage of normal mode. + * + * ACT8945A_REGULATOR_MODE_LOWPOWER: For DCDC and LDO regulators; it specify + * the usage of proprietary power-saving + * mode. + */ + +#define ACT8945A_REGULATOR_MODE_FIXED 1 +#define ACT8945A_REGULATOR_MODE_NORMAL 2 +#define ACT8945A_REGULATOR_MODE_LOWPOWER 3 + +#endif |