diff options
| -rw-r--r-- | drivers/regulator/s2mps11.c | 67 | ||||
| -rw-r--r-- | include/linux/mfd/samsung/s2mps14.h | 2 |
2 files changed, 67 insertions, 2 deletions
diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c index 3aba0331fb5d..6dad0aa74a47 100644 --- a/drivers/regulator/s2mps11.c +++ b/drivers/regulator/s2mps11.c @@ -27,6 +27,7 @@ #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/of_regulator.h> +#include <linux/of_gpio.h> #include <linux/mfd/samsung/core.h> #include <linux/mfd/samsung/s2mps11.h> #include <linux/mfd/samsung/s2mps14.h> @@ -44,6 +45,8 @@ struct s2mps11_info { * was enabled. */ unsigned int s2mps14_suspend_state:30; + /* Array of size rdev_num with GPIO-s for external sleep control */ + int *ext_control_gpio; }; static int get_ramp_delay(int ramp_delay) @@ -409,6 +412,8 @@ static int s2mps14_regulator_enable(struct regulator_dev *rdev) if (s2mps11->s2mps14_suspend_state & (1 << rdev_get_id(rdev))) val = S2MPS14_ENABLE_SUSPEND; + else if (s2mps11->ext_control_gpio[rdev_get_id(rdev)]) + val = S2MPS14_ENABLE_EXT_CONTROL; else val = rdev->desc->enable_mask; @@ -565,9 +570,41 @@ static const struct regulator_desc s2mps14_regulators[] = { regulator_desc_s2mps14_buck1235(5), }; -static int s2mps11_pmic_dt_parse(struct platform_device *pdev, +static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11, + struct regulator_dev *rdev) +{ + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, S2MPS14_ENABLE_EXT_CONTROL); +} + +static void s2mps14_pmic_dt_parse_ext_control_gpio(struct platform_device *pdev, struct of_regulator_match *rdata, struct s2mps11_info *s2mps11) { + int *gpio = s2mps11->ext_control_gpio; + unsigned int i; + unsigned int valid_regulators[3] = { S2MPS14_LDO10, S2MPS14_LDO11, + S2MPS14_LDO12 }; + + for (i = 0; i < ARRAY_SIZE(valid_regulators); i++) { + unsigned int reg = valid_regulators[i]; + + if (!rdata[reg].init_data || !rdata[reg].of_node) + continue; + + gpio[reg] = of_get_named_gpio(rdata[reg].of_node, + "samsung,ext-control-gpios", 0); + if (!gpio_is_valid(gpio[reg])) + gpio[reg] = 0; + else + dev_dbg(&pdev->dev, "Using GPIO %d for ext-control over %d/%s\n", + gpio[reg], reg, rdata[reg].name); + } +} + +static int s2mps11_pmic_dt_parse(struct platform_device *pdev, + struct of_regulator_match *rdata, struct s2mps11_info *s2mps11, + enum sec_device_type dev_type) +{ struct device_node *reg_np; reg_np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); @@ -577,6 +614,9 @@ static int s2mps11_pmic_dt_parse(struct platform_device *pdev, } of_regulator_match(&pdev->dev, reg_np, rdata, s2mps11->rdev_num); + if (dev_type == S2MPS14X) + s2mps14_pmic_dt_parse_ext_control_gpio(pdev, rdata, s2mps11); + of_node_put(reg_np); return 0; @@ -613,6 +653,12 @@ static int s2mps11_pmic_probe(struct platform_device *pdev) return -EINVAL; }; + s2mps11->ext_control_gpio = devm_kzalloc(&pdev->dev, + sizeof(*s2mps11->ext_control_gpio) * s2mps11->rdev_num, + GFP_KERNEL); + if (!s2mps11->ext_control_gpio) + return -ENOMEM; + if (!iodev->dev->of_node) { if (iodev->pdata) { pdata = iodev->pdata; @@ -631,7 +677,7 @@ static int s2mps11_pmic_probe(struct platform_device *pdev) for (i = 0; i < s2mps11->rdev_num; i++) rdata[i].name = regulators[i].name; - ret = s2mps11_pmic_dt_parse(pdev, rdata, s2mps11); + ret = s2mps11_pmic_dt_parse(pdev, rdata, s2mps11, dev_type); if (ret) goto out; @@ -652,6 +698,12 @@ common_reg: config.of_node = rdata[i].of_node; } + if (s2mps11->ext_control_gpio[i]) { + config.ena_gpio = s2mps11->ext_control_gpio[i]; + config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH; + } else + config.ena_gpio = config.ena_gpio_flags = 0; + regulator = devm_regulator_register(&pdev->dev, ®ulators[i], &config); if (IS_ERR(regulator)) { @@ -660,6 +712,17 @@ common_reg: i); goto out; } + + if (s2mps11->ext_control_gpio[i]) { + ret = s2mps14_pmic_enable_ext_control(s2mps11, + regulator); + if (ret < 0) { + dev_err(&pdev->dev, + "failed to enable GPIO control over %s: %d\n", + regulator->desc->name, ret); + goto out; + } + } } out: diff --git a/include/linux/mfd/samsung/s2mps14.h b/include/linux/mfd/samsung/s2mps14.h index 4b449b8ac548..900cd7a04314 100644 --- a/include/linux/mfd/samsung/s2mps14.h +++ b/include/linux/mfd/samsung/s2mps14.h @@ -148,6 +148,8 @@ enum s2mps14_regulators { #define S2MPS14_ENABLE_SHIFT 6 /* On/Off controlled by PWREN */ #define S2MPS14_ENABLE_SUSPEND (0x01 << S2MPS14_ENABLE_SHIFT) +/* On/Off controlled by LDO10EN or EMMCEN */ +#define S2MPS14_ENABLE_EXT_CONTROL (0x00 << S2MPS14_ENABLE_SHIFT) #define S2MPS14_LDO_N_VOLTAGES (S2MPS14_LDO_VSEL_MASK + 1) #define S2MPS14_BUCK_N_VOLTAGES (S2MPS14_BUCK_VSEL_MASK + 1) |