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-rw-r--r--arch/arm/mach-pxa/hx4700.c23
-rw-r--r--arch/arm/mach-pxa/magician.c23
-rw-r--r--drivers/regulator/gpio-regulator.c150
-rw-r--r--include/linux/regulator/gpio-regulator.h12
4 files changed, 95 insertions, 113 deletions
diff --git a/arch/arm/mach-pxa/hx4700.c b/arch/arm/mach-pxa/hx4700.c
index b79b757fdd41..51d38d5e776a 100644
--- a/arch/arm/mach-pxa/hx4700.c
+++ b/arch/arm/mach-pxa/hx4700.c
@@ -19,6 +19,7 @@
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/fb.h>
+#include <linux/gpio/machine.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
@@ -702,9 +703,7 @@ static struct regulator_init_data bq24022_init_data = {
.consumer_supplies = bq24022_consumers,
};
-static struct gpio bq24022_gpios[] = {
- { GPIO96_HX4700_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" },
-};
+static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW };
static struct gpio_regulator_state bq24022_states[] = {
{ .value = 100000, .gpios = (0 << 0) },
@@ -714,12 +713,10 @@ 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,
- .gpios = bq24022_gpios,
- .nr_gpios = ARRAY_SIZE(bq24022_gpios),
+ .gflags = bq24022_gpiod_gflags,
+ .ngpios = ARRAY_SIZE(bq24022_gpiod_gflags),
.states = bq24022_states,
.nr_states = ARRAY_SIZE(bq24022_states),
@@ -736,6 +733,17 @@ static struct platform_device bq24022 = {
},
};
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+ .dev_id = "gpio-regulator",
+ .table = {
+ GPIO_LOOKUP("gpio-pxa", GPIO96_HX4700_BQ24022_ISET2,
+ NULL, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP("gpio-pxa", GPIO72_HX4700_BQ24022_nCHARGE_EN,
+ "enable", GPIO_ACTIVE_LOW),
+ { },
+ },
+};
+
/*
* StrataFlash
*/
@@ -878,6 +886,7 @@ 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));
diff --git a/arch/arm/mach-pxa/magician.c b/arch/arm/mach-pxa/magician.c
index 08b079653c3f..6538a7c0e504 100644
--- a/arch/arm/mach-pxa/magician.c
+++ b/arch/arm/mach-pxa/magician.c
@@ -645,9 +645,8 @@ static struct regulator_init_data bq24022_init_data = {
.consumer_supplies = bq24022_consumers,
};
-static struct gpio bq24022_gpios[] = {
- { EGPIO_MAGICIAN_BQ24022_ISET2, GPIOF_OUT_INIT_LOW, "bq24022_iset2" },
-};
+
+static enum gpiod_flags bq24022_gpiod_gflags[] = { GPIOD_OUT_LOW };
static struct gpio_regulator_state bq24022_states[] = {
{ .value = 100000, .gpios = (0 << 0) },
@@ -657,12 +656,10 @@ 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,
- .gpios = bq24022_gpios,
- .nr_gpios = ARRAY_SIZE(bq24022_gpios),
+ .gflags = bq24022_gpiod_gflags,
+ .ngpios = ARRAY_SIZE(bq24022_gpiod_gflags),
.states = bq24022_states,
.nr_states = ARRAY_SIZE(bq24022_states),
@@ -679,6 +676,17 @@ static struct platform_device bq24022 = {
},
};
+static struct gpiod_lookup_table bq24022_gpiod_table = {
+ .dev_id = "gpio-regulator",
+ .table = {
+ GPIO_LOOKUP("gpio-pxa", EGPIO_MAGICIAN_BQ24022_ISET2,
+ NULL, GPIO_ACTIVE_HIGH),
+ GPIO_LOOKUP("gpio-pxa", GPIO30_MAGICIAN_BQ24022_nCHARGE_EN,
+ "enable", GPIO_ACTIVE_LOW),
+ { },
+ },
+};
+
/*
* fixed regulator for ads7846
*/
@@ -1027,6 +1035,7 @@ 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));
}
diff --git a/drivers/regulator/gpio-regulator.c b/drivers/regulator/gpio-regulator.c
index b2f5ec4f658a..07fb41abd4e8 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -30,16 +30,15 @@
#include <linux/regulator/machine.h>
#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>
struct gpio_regulator_data {
struct regulator_desc desc;
struct regulator_dev *dev;
- struct gpio *gpios;
+ struct gpio_desc **gpiods;
int nr_gpios;
struct gpio_regulator_state *states;
@@ -82,7 +81,7 @@ static int gpio_regulator_set_voltage(struct regulator_dev *dev,
for (ptr = 0; ptr < data->nr_gpios; ptr++) {
state = (target & (1 << ptr)) >> ptr;
- gpio_set_value_cansleep(data->gpios[ptr].gpio, state);
+ gpiod_set_value_cansleep(data->gpiods[ptr], state);
}
data->state = target;
@@ -119,7 +118,7 @@ static int gpio_regulator_set_current_limit(struct regulator_dev *dev,
for (ptr = 0; ptr < data->nr_gpios; ptr++) {
state = (target & (1 << ptr)) >> ptr;
- gpio_set_value_cansleep(data->gpios[ptr].gpio, state);
+ gpiod_set_value_cansleep(data->gpiods[ptr], state);
}
data->state = target;
@@ -138,7 +137,8 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
{
struct gpio_regulator_config *config;
const char *regtype;
- int proplen, gpio, i;
+ int proplen, i;
+ int ngpios;
int ret;
config = devm_kzalloc(dev,
@@ -153,59 +153,36 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
config->supply_name = config->init_data->constraints.name;
- if (of_property_read_bool(np, "enable-active-high"))
- config->enable_high = true;
-
if (of_property_read_bool(np, "enable-at-boot"))
config->enabled_at_boot = true;
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))
- return ERR_PTR(ret);
-
- if (ret > 0) {
- config->nr_gpios = ret;
- config->gpios = devm_kcalloc(dev,
- config->nr_gpios, sizeof(struct gpio),
- GFP_KERNEL);
- if (!config->gpios)
+ /* Fetch GPIO init levels */
+ ngpios = gpiod_count(dev, NULL);
+ if (ngpios > 0) {
+ config->gflags = devm_kzalloc(dev,
+ sizeof(enum gpiod_flags)
+ * ngpios,
+ GFP_KERNEL);
+ if (!config->gflags)
return ERR_PTR(-ENOMEM);
- proplen = of_property_count_u32_elems(np, "gpios-states");
- /* optional property */
- if (proplen < 0)
- proplen = 0;
+ for (i = 0; i < ngpios; i++) {
+ u32 val;
- if (proplen > 0 && proplen != config->nr_gpios) {
- dev_warn(dev, "gpios <-> gpios-states mismatch\n");
- proplen = 0;
- }
+ ret = of_property_read_u32_index(np, "gpios-states", i,
+ &val);
- for (i = 0; i < config->nr_gpios; i++) {
- gpio = of_get_named_gpio(np, "gpios", i);
- if (gpio < 0) {
- if (gpio != -ENOENT)
- return ERR_PTR(gpio);
- break;
- }
- config->gpios[i].gpio = gpio;
- config->gpios[i].label = config->supply_name;
- if (proplen > 0) {
- of_property_read_u32_index(np, "gpios-states",
- i, &ret);
- if (ret)
- config->gpios[i].flags =
- GPIOF_OUT_INIT_HIGH;
- }
+ /* Default to high per specification */
+ if (ret)
+ config->gflags[i] = GPIOD_OUT_HIGH;
+ else
+ config->gflags[i] =
+ val ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
}
}
+ config->ngpios = ngpios;
/* Fetch states. */
proplen = of_property_count_u32_elems(np, "states");
@@ -255,7 +232,8 @@ 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 = { };
- int ptr, ret, state;
+ enum gpiod_flags gflags;
+ int ptr, ret, state, i;
drvdata = devm_kzalloc(&pdev->dev, sizeof(struct gpio_regulator_data),
GFP_KERNEL);
@@ -275,26 +253,21 @@ static int gpio_regulator_probe(struct platform_device *pdev)
return -ENOMEM;
}
- if (config->nr_gpios != 0) {
- drvdata->gpios = kmemdup(config->gpios,
- config->nr_gpios * sizeof(struct gpio),
- GFP_KERNEL);
- if (drvdata->gpios == NULL) {
- dev_err(&pdev->dev, "Failed to allocate gpio data\n");
- ret = -ENOMEM;
- goto err_name;
- }
-
- drvdata->nr_gpios = config->nr_gpios;
- ret = gpio_request_array(drvdata->gpios, drvdata->nr_gpios);
- if (ret) {
- if (ret != -EPROBE_DEFER)
- dev_err(&pdev->dev,
- "Could not obtain regulator setting GPIOs: %d\n",
- ret);
- goto err_memgpio;
- }
+ drvdata->gpiods = devm_kzalloc(&pdev->dev, sizeof(struct gpio_desc *),
+ GFP_KERNEL);
+ if (!drvdata->gpiods)
+ return -ENOMEM;
+ for (i = 0; i < config->ngpios; i++) {
+ drvdata->gpiods[i] = devm_gpiod_get_index(&pdev->dev,
+ NULL,
+ i,
+ config->gflags[i]);
+ if (IS_ERR(drvdata->gpiods[i]))
+ return PTR_ERR(drvdata->gpiods[i]);
+ /* This is good to know */
+ gpiod_set_consumer_name(drvdata->gpiods[i], drvdata->desc.name);
}
+ drvdata->nr_gpios = config->ngpios;
drvdata->states = kmemdup(config->states,
config->nr_states *
@@ -303,7 +276,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
if (drvdata->states == NULL) {
dev_err(&pdev->dev, "Failed to allocate state data\n");
ret = -ENOMEM;
- goto err_stategpio;
+ goto err_name;
}
drvdata->nr_states = config->nr_states;
@@ -330,7 +303,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
/* build initial state from gpio init data. */
state = 0;
for (ptr = 0; ptr < drvdata->nr_gpios; ptr++) {
- if (config->gpios[ptr].flags & GPIOF_OUT_INIT_HIGH)
+ if (config->gflags[ptr] == GPIOD_OUT_HIGH)
state |= (1 << ptr);
}
drvdata->state = state;
@@ -340,21 +313,19 @@ 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;
- else
- cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
- } else {
- if (config->enable_high)
- cfg.ena_gpio_flags |= GPIOF_OUT_INIT_LOW;
- else
- cfg.ena_gpio_flags |= GPIOF_OUT_INIT_HIGH;
+ /*
+ * The signal will be inverted by the GPIO core if flagged so in the
+ * decriptor.
+ */
+ if (config->enabled_at_boot)
+ gflags = GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE;
+ else
+ gflags = GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE;
+
+ cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, "enable", gflags);
+ if (IS_ERR(cfg.ena_gpiod)) {
+ ret = PTR_ERR(cfg.ena_gpiod);
+ goto err_memstate;
}
drvdata->dev = regulator_register(&drvdata->desc, &cfg);
@@ -370,10 +341,6 @@ static int gpio_regulator_probe(struct platform_device *pdev)
err_memstate:
kfree(drvdata->states);
-err_stategpio:
- gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
-err_memgpio:
- kfree(drvdata->gpios);
err_name:
kfree(drvdata->desc.name);
return ret;
@@ -384,12 +351,7 @@ static int gpio_regulator_remove(struct platform_device *pdev)
struct gpio_regulator_data *drvdata = platform_get_drvdata(pdev);
regulator_unregister(drvdata->dev);
-
- gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
-
kfree(drvdata->states);
- kfree(drvdata->gpios);
-
kfree(drvdata->desc.name);
return 0;
diff --git a/include/linux/regulator/gpio-regulator.h b/include/linux/regulator/gpio-regulator.h
index 19fbd267406d..49c407afb944 100644
--- a/include/linux/regulator/gpio-regulator.h
+++ b/include/linux/regulator/gpio-regulator.h
@@ -21,6 +21,8 @@
#ifndef __REGULATOR_GPIO_H
#define __REGULATOR_GPIO_H
+#include <linux/gpio/consumer.h>
+
struct regulator_init_data;
enum regulator_type;
@@ -53,9 +55,9 @@ struct gpio_regulator_state {
* This is used to keep the regulator at
* the default state
* @startup_delay: Start-up time in microseconds
- * @gpios: Array containing the gpios needed to control
- * the setting of the regulator
- * @nr_gpios: Number of gpios
+ * @gflags: Array of GPIO configuration flags for initial
+ * states
+ * @ngpios: Number of GPIOs and configurations available
* @states: Array of gpio_regulator_state entries describing
* the gpio state for specific voltages
* @nr_states: Number of states available
@@ -74,8 +76,8 @@ struct gpio_regulator_config {
unsigned enabled_at_boot:1;
unsigned startup_delay;
- struct gpio *gpios;
- int nr_gpios;
+ enum gpiod_flags *gflags;
+ int ngpios;
struct gpio_regulator_state *states;
int nr_states;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.