diff options
Diffstat (limited to 'drivers/regulator/sy7636a-regulator.c')
| -rw-r--r-- | drivers/regulator/sy7636a-regulator.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/drivers/regulator/sy7636a-regulator.c b/drivers/regulator/sy7636a-regulator.c index 29fc27c2cda0..551647bc1052 100644 --- a/drivers/regulator/sy7636a-regulator.c +++ b/drivers/regulator/sy7636a-regulator.c @@ -12,6 +12,7 @@ #include <linux/mfd/sy7636a.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/regulator/consumer.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regmap.h> @@ -19,6 +20,8 @@ struct sy7636a_data { struct regmap *regmap; struct gpio_desc *pgood_gpio; + struct gpio_desc *en_gpio; + struct gpio_desc *vcom_en_gpio; }; static int sy7636a_get_vcom_voltage_op(struct regulator_dev *rdev) @@ -83,9 +86,11 @@ static int sy7636a_regulator_probe(struct platform_device *pdev) if (!regmap) return -EPROBE_DEFER; - gdp = devm_gpiod_get(pdev->dev.parent, "epd-pwr-good", GPIOD_IN); + device_set_of_node_from_dev(&pdev->dev, pdev->dev.parent); + + gdp = devm_gpiod_get(&pdev->dev, "epd-pwr-good", GPIOD_IN); if (IS_ERR(gdp)) { - dev_err(pdev->dev.parent, "Power good GPIO fault %ld\n", PTR_ERR(gdp)); + dev_err(&pdev->dev, "Power good GPIO fault %ld\n", PTR_ERR(gdp)); return PTR_ERR(gdp); } @@ -96,6 +101,30 @@ static int sy7636a_regulator_probe(struct platform_device *pdev) data->regmap = regmap; data->pgood_gpio = gdp; + ret = devm_regulator_get_enable_optional(&pdev->dev, "vin"); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "failed to get vin regulator\n"); + + data->en_gpio = devm_gpiod_get_optional(&pdev->dev, "enable", + GPIOD_OUT_HIGH); + if (IS_ERR(data->en_gpio)) + return dev_err_probe(&pdev->dev, + PTR_ERR(data->en_gpio), + "failed to get en gpio\n"); + + /* Let VCOM just follow the default power on sequence */ + data->vcom_en_gpio = devm_gpiod_get_optional(&pdev->dev, + "vcom-en", GPIOD_OUT_LOW); + if (IS_ERR(data->vcom_en_gpio)) + return dev_err_probe(&pdev->dev, + PTR_ERR(data->vcom_en_gpio), + "failed to get vcom-en gpio\n"); + + /* if chip was not enabled, give it time to wake up */ + if (data->en_gpio) + usleep_range(2500, 4000); + platform_set_drvdata(pdev, data); ret = regmap_write(regmap, SY7636A_REG_POWER_ON_DELAY_TIME, 0x0); @@ -105,7 +134,6 @@ static int sy7636a_regulator_probe(struct platform_device *pdev) } config.dev = &pdev->dev; - config.dev->of_node = pdev->dev.parent->of_node; config.regmap = regmap; rdev = devm_regulator_register(&pdev->dev, &desc, &config); @@ -127,6 +155,7 @@ MODULE_DEVICE_TABLE(platform, sy7636a_regulator_id_table); static struct platform_driver sy7636a_regulator_driver = { .driver = { .name = "sy7636a-regulator", + .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, .probe = sy7636a_regulator_probe, .id_table = sy7636a_regulator_id_table, |