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regulator: gpio: Get enable GPIO using GPIO descriptor

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We augment the GPIO regulator to get the *enable* regulator
GPIO line (not the other lines) using a descriptor rather than
a global number.

We then pass this into the regulator core which has been
prepared to hande enable descriptors in a separate patch.

Switch over the two boardfiles using this facility and clean
up so we only pass descriptors around.

Cc: Philipp Zabel <philipp.zabel@gmail.com> # HX4700/Magician maintainer
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 10:06:23 +02:00 committed by Mark Brown
parent 6059577cb2
commit 37bed97f00
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
4 changed files with 32 additions and 17 deletions
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12
arch/arm/mach-pxa/hx4700.c
View file

@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/gpio.h>
#include <linux/gpio/machine.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
#include <linux/input/navpoint.h>
@ -711,7 +712,6 @@ static struct gpio_regulator_state bq24022_states[] = {
static struct gpio_regulator_config bq24022_info = {
.supply_name = "bq24022",
.enable_gpio = GPIO72_HX4700_BQ24022_nCHARGE_EN,
.enable_high = 0,
.enabled_at_boot = 0,
@ -733,6 +733,15 @@ static struct platform_device bq24022 = {
},
};
static struct gpiod_lookup_table bq24022_gpiod_table = {
.dev_id = "gpio-regulator",
.table = {
GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
"enable", GPIO_ACTIVE_HIGH),
{ },
},
};
/*
* StrataFlash
*/
@ -875,6 +884,7 @@ static void __init hx4700_init(void)
pxa_set_btuart_info(NULL);
pxa_set_stuart_info(NULL);
gpiod_add_lookup_table(&bq24022_gpiod_table);
platform_add_devices(devices, ARRAY_SIZE(devices));
pwm_add_table(hx4700_pwm_lookup, ARRAY_SIZE(hx4700_pwm_lookup));

11
arch/arm/mach-pxa/magician.c
View file

@ -657,7 +657,6 @@ static struct gpio_regulator_state bq24022_states[] = {
static struct gpio_regulator_config bq24022_info = {
.supply_name = "bq24022",
.enable_gpio = GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
.enable_high = 0,
.enabled_at_boot = 1,
@ -679,6 +678,15 @@ static struct platform_device bq24022 = {
},
};
static struct gpiod_lookup_table bq24022_gpiod_table = {
.dev_id = "gpio-regulator",
.table = {
GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
"enable", GPIO_ACTIVE_HIGH),
{ },
},
};
/*
* fixed regulator for ads7846
*/
@ -1007,6 +1015,7 @@ static void __init magician_init(void)
regulator_register_always_on(0, "power", pwm_backlight_supply,
ARRAY_SIZE(pwm_backlight_supply), 5000000);
gpiod_add_lookup_table(&bq24022_gpiod_table);
platform_add_devices(ARRAY_AND_SIZE(devices));
}

23
drivers/regulator/gpio-regulator.c
View file

@ -31,6 +31,7 @@
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/gpio-regulator.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
@ -161,10 +162,6 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
of_property_read_u32(np, "startup-delay-us", &config->startup_delay);
config->enable_gpio = of_get_named_gpio(np, "enable-gpio", 0);
if (config->enable_gpio < 0 && config->enable_gpio != -ENOENT)
return ERR_PTR(config->enable_gpio);
/* Fetch GPIOs. - optional property*/
ret = of_gpio_count(np);
if ((ret < 0) && (ret != -ENOENT))
@ -255,6 +252,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
struct gpio_regulator_data *drvdata;
struct regulator_config cfg = { };
enum gpiod_flags gflags;
int ptr, ret, state;
drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
@ -340,21 +338,22 @@ static int gpio_regulator_probe(struct platform_device *pdev)
cfg.driver_data = drvdata;
cfg.of_node = np;
if (gpio_is_valid(config->enable_gpio)) {
cfg.ena_gpio = config->enable_gpio;
cfg.ena_gpio_initialized = true;
}
cfg.ena_gpio_invert = !config->enable_high;
if (config->enabled_at_boot) {
if (config->enable_high)
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
gflags = GPIOD_OUT_HIGH;
else
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
gflags = GPIOD_OUT_LOW;
} else {
if (config->enable_high)
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
gflags = GPIOD_OUT_LOW;
else
cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
gflags = GPIOD_OUT_HIGH;
}
cfg.ena_gpiod = devm_gpiod_get_optional(&pdev->dev, "enable", gflags);
if (IS_ERR(cfg.ena_gpiod)) {
ret = PTR_ERR(cfg.ena_gpiod);
goto err_stategpio;
}
drvdata->dev = regulator_register(&drvdata->desc, &cfg);

3
include/linux/regulator/gpio-regulator.h
View file

@ -44,8 +44,6 @@ struct gpio_regulator_state {
/**
* struct gpio_regulator_config - config structure
* @supply_name: Name of the regulator supply
* @enable_gpio: GPIO to use for enable control
* set to -EINVAL if not used
* @enable_high: Polarity of enable GPIO
* 1 = Active high, 0 = Active low
* @enabled_at_boot: Whether regulator has been enabled at
@ -69,7 +67,6 @@ struct gpio_regulator_state {
struct gpio_regulator_config {
const char *supply_name;
int enable_gpio;
unsigned enable_high:1;
unsigned enabled_at_boot:1;
unsigned startup_delay;