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regulator: max8973: Pass descriptor instead of GPIO number

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Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_optional() call.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Linus Walleij 2018-05-14 10:06:25 +02:00 committed by Mark Brown
parent 910adc0e1b
commit e7d2be696f
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 29 additions and 25 deletions
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50
drivers/regulator/max8973-regulator.c
View file

@ -34,6 +34,7 @@
#include <linux/regulator/max8973-regulator.h> #include <linux/regulator/max8973-regulator.h>
#include <linux/regulator/of_regulator.h> #include <linux/regulator/of_regulator.h>
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of_gpio.h> #include <linux/of_gpio.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/slab.h> #include <linux/slab.h>
@ -114,7 +115,6 @@ struct max8973_chip {
struct regulator_desc desc; struct regulator_desc desc;
struct regmap *regmap; struct regmap *regmap;
bool enable_external_control; bool enable_external_control;
int enable_gpio;
int dvs_gpio; int dvs_gpio;
int lru_index[MAX8973_MAX_VOUT_REG]; int lru_index[MAX8973_MAX_VOUT_REG];
int curr_vout_val[MAX8973_MAX_VOUT_REG]; int curr_vout_val[MAX8973_MAX_VOUT_REG];
@ -567,7 +567,6 @@ static struct max8973_regulator_platform_data *max8973_parse_dt(
pdata->enable_ext_control = of_property_read_bool(np, pdata->enable_ext_control = of_property_read_bool(np,
"maxim,externally-enable"); "maxim,externally-enable");
pdata->enable_gpio = of_get_named_gpio(np, "maxim,enable-gpio", 0);
pdata->dvs_gpio = of_get_named_gpio(np, "maxim,dvs-gpio", 0); pdata->dvs_gpio = of_get_named_gpio(np, "maxim,dvs-gpio", 0);
ret = of_property_read_u32(np, "maxim,dvs-default-state", &pval); ret = of_property_read_u32(np, "maxim,dvs-default-state", &pval);
@ -633,6 +632,8 @@ static int max8973_probe(struct i2c_client *client,
struct max8973_chip *max; struct max8973_chip *max;
bool pdata_from_dt = false; bool pdata_from_dt = false;
unsigned int chip_id; unsigned int chip_id;
struct gpio_desc *gpiod;
enum gpiod_flags gflags;
int ret; int ret;
pdata = dev_get_platdata(&client->dev); pdata = dev_get_platdata(&client->dev);
@ -647,8 +648,7 @@ static int max8973_probe(struct i2c_client *client,
return -EIO; return -EIO;
} }
if ((pdata->dvs_gpio == -EPROBE_DEFER) || if (pdata->dvs_gpio == -EPROBE_DEFER)
(pdata->enable_gpio == -EPROBE_DEFER))
return -EPROBE_DEFER; return -EPROBE_DEFER;
max = devm_kzalloc(&client->dev, sizeof(*max), GFP_KERNEL); max = devm_kzalloc(&client->dev, sizeof(*max), GFP_KERNEL);
@ -696,15 +696,11 @@ static int max8973_probe(struct i2c_client *client,
max->desc.n_voltages = MAX8973_BUCK_N_VOLTAGE; max->desc.n_voltages = MAX8973_BUCK_N_VOLTAGE;
max->dvs_gpio = (pdata->dvs_gpio) ? pdata->dvs_gpio : -EINVAL; max->dvs_gpio = (pdata->dvs_gpio) ? pdata->dvs_gpio : -EINVAL;
max->enable_gpio = (pdata->enable_gpio) ? pdata->enable_gpio : -EINVAL;
max->enable_external_control = pdata->enable_ext_control; max->enable_external_control = pdata->enable_ext_control;
max->curr_gpio_val = pdata->dvs_def_state; max->curr_gpio_val = pdata->dvs_def_state;
max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state; max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
max->junction_temp_warning = pdata->junction_temp_warning; max->junction_temp_warning = pdata->junction_temp_warning;
if (gpio_is_valid(max->enable_gpio))
max->enable_external_control = true;
max->lru_index[0] = max->curr_vout_reg; max->lru_index[0] = max->curr_vout_reg;
if (gpio_is_valid(max->dvs_gpio)) { if (gpio_is_valid(max->dvs_gpio)) {
@ -757,27 +753,35 @@ static int max8973_probe(struct i2c_client *client,
break; break;
} }
if (gpio_is_valid(max->enable_gpio)) {
config.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
if (ridata && (ridata->constraints.always_on || if (ridata && (ridata->constraints.always_on ||
ridata->constraints.boot_on)) ridata->constraints.boot_on))
config.ena_gpio_flags = GPIOF_OUT_INIT_HIGH; gflags = GPIOD_OUT_HIGH;
config.ena_gpio = max->enable_gpio; else
gflags = GPIOD_OUT_LOW;
gpiod = devm_gpiod_get_optional(&client->dev,
"maxim,enable",
gflags);
if (IS_ERR(gpiod))
return PTR_ERR(gpiod);
if (gpiod) {
config.ena_gpiod = gpiod;
max->enable_external_control = true;
} }
break; break;
case MAX77621: case MAX77621:
if (gpio_is_valid(max->enable_gpio)) { /*
ret = devm_gpio_request_one(&client->dev, * We do not let the core switch this regulator on/off,
max->enable_gpio, GPIOF_OUT_INIT_HIGH, * we just leave it on.
"max8973-en-gpio"); */
if (ret) { gpiod = devm_gpiod_get_optional(&client->dev,
dev_err(&client->dev, "maxim,enable",
"gpio_request for gpio %d failed: %d\n", GPIOD_OUT_HIGH);
max->enable_gpio, ret); if (IS_ERR(gpiod))
return ret; return PTR_ERR(gpiod);
} if (gpiod)
} max->enable_external_control = true;
max->desc.enable_reg = MAX8973_VOUT; max->desc.enable_reg = MAX8973_VOUT;
max->desc.enable_mask = MAX8973_VOUT_ENABLE; max->desc.enable_mask = MAX8973_VOUT_ENABLE;