diff options
Diffstat (limited to 'drivers/regulator/arizona-ldo1.c')
| -rw-r--r-- | drivers/regulator/arizona-ldo1.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c index b1033d30b50..04f262a836b 100644 --- a/drivers/regulator/arizona-ldo1.c +++ b/drivers/regulator/arizona-ldo1.c @@ -16,9 +16,11 @@ #include <linux/init.h> #include <linux/bitops.h> #include <linux/err.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> #include <linux/gpio.h> #include <linux/slab.h> @@ -178,6 +180,42 @@ static const struct regulator_init_data arizona_ldo1_default = { .num_consumer_supplies = 1, }; +static int arizona_ldo1_of_get_pdata(struct arizona *arizona, + struct regulator_config *config) +{ + struct arizona_pdata *pdata = &arizona->pdata; + struct arizona_ldo1 *ldo1 = config->driver_data; + struct device_node *init_node, *dcvdd_node; + struct regulator_init_data *init_data; + + pdata->ldoena = arizona_of_get_named_gpio(arizona, "wlf,ldoena", true); + + init_node = of_get_child_by_name(arizona->dev->of_node, "ldo1"); + dcvdd_node = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0); + + if (init_node) { + config->of_node = init_node; + + init_data = of_get_regulator_init_data(arizona->dev, init_node); + + if (init_data) { + init_data->consumer_supplies = &ldo1->supply; + init_data->num_consumer_supplies = 1; + + if (dcvdd_node && dcvdd_node != init_node) + arizona->external_dcvdd = true; + + pdata->ldo1 = init_data; + } + } else if (dcvdd_node) { + arizona->external_dcvdd = true; + } + + of_node_put(dcvdd_node); + + return 0; +} + static int arizona_ldo1_probe(struct platform_device *pdev) { struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); @@ -186,6 +224,8 @@ static int arizona_ldo1_probe(struct platform_device *pdev) struct arizona_ldo1 *ldo1; int ret; + arizona->external_dcvdd = false; + ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); if (!ldo1) return -ENOMEM; @@ -216,6 +256,15 @@ static int arizona_ldo1_probe(struct platform_device *pdev) config.dev = arizona->dev; config.driver_data = ldo1; config.regmap = arizona->regmap; + + if (IS_ENABLED(CONFIG_OF)) { + if (!dev_get_platdata(arizona->dev)) { + ret = arizona_ldo1_of_get_pdata(arizona, &config); + if (ret < 0) + return ret; + } + } + config.ena_gpio = arizona->pdata.ldoena; if (arizona->pdata.ldo1) @@ -223,6 +272,13 @@ static int arizona_ldo1_probe(struct platform_device *pdev) else config.init_data = &ldo1->init_data; + /* + * LDO1 can only be used to supply DCVDD so if it has no + * consumers then DCVDD is supplied externally. + */ + if (config.init_data->num_consumer_supplies == 0) + arizona->external_dcvdd = true; + ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config); if (IS_ERR(ldo1->regulator)) { ret = PTR_ERR(ldo1->regulator); @@ -231,6 +287,8 @@ static int arizona_ldo1_probe(struct platform_device *pdev) return ret; } + of_node_put(config.of_node); + platform_set_drvdata(pdev, ldo1); return 0; |