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Subject[PATCH 5/5 v9] regulator: core: Only support passing enable GPIO descriptors
Date
Now that we changed all providers to pass descriptors into the core
for enable GPIOs instead of a global GPIO number, delete the support
for passing GPIO numbers in, and we get a cleanup and size reduction
in the core, and from a GPIO point of view we use the modern, cleaner
interface.

Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v8->v9:
- Rebased on other changes.
- Collected Marek's Tested-by.
ChangeLog v7->v8:
- Rebase on v5.0-rc1.
ChangeLog v6->v7:
- Resend with the rest.
ChangeLog v4->v6:
- Rebase on top of the other changes.
- Renumber to fit the rest of the series.
ChangeLog v3->v4:
- Also drop ena_gpio_invert from driver data
ChangeLog v2->v3:
- Resending.
ChangeLog v1->v2:
- Rebase the patch on the other changes.
---
drivers/regulator/core.c | 32 ++++++--------------------------
include/linux/regulator/driver.h | 12 +-----------
2 files changed, 7 insertions(+), 37 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 48baa03ff3d8..bb688125ebd4 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -23,7 +23,6 @@
#include <linux/mutex.h>
#include <linux/suspend.h>
#include <linux/delay.h>
-#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of.h>
#include <linux/regmap.h>
@@ -2236,35 +2235,19 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
{
struct regulator_enable_gpio *pin;
struct gpio_desc *gpiod;
- int ret;

- if (config->ena_gpiod)
- gpiod = config->ena_gpiod;
- else
- gpiod = gpio_to_desc(config->ena_gpio);
+ gpiod = config->ena_gpiod;

list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
if (pin->gpiod == gpiod) {
- rdev_dbg(rdev, "GPIO %d is already used\n",
- config->ena_gpio);
+ rdev_dbg(rdev, "GPIO is already used\n");
goto update_ena_gpio_to_rdev;
}
}

- if (!config->ena_gpiod) {
- ret = gpio_request_one(config->ena_gpio,
- GPIOF_DIR_OUT | config->ena_gpio_flags,
- rdev_get_name(rdev));
- if (ret)
- return ret;
- }
-
pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
- if (pin == NULL) {
- if (!config->ena_gpiod)
- gpio_free(config->ena_gpio);
+ if (pin == NULL)
return -ENOMEM;
- }

pin->gpiod = gpiod;
list_add(&pin->list, &regulator_ena_gpio_list);
@@ -2287,7 +2270,6 @@ static void regulator_ena_gpio_free(struct regulator_dev *rdev)
if (pin->gpiod == rdev->ena_pin->gpiod) {
if (pin->request_count <= 1) {
pin->request_count = 0;
- gpiod_put(pin->gpiod);
list_del(&pin->list);
kfree(pin);
rdev->ena_pin = NULL;
@@ -4971,15 +4953,13 @@ regulator_register(const struct regulator_desc *regulator_desc,
goto clean;
}

- if (config->ena_gpiod ||
- ((config->ena_gpio || config->ena_gpio_initialized) &&
- gpio_is_valid(config->ena_gpio))) {
+ if (config->ena_gpiod) {
mutex_lock(&regulator_list_mutex);
ret = regulator_ena_gpio_request(rdev, config);
mutex_unlock(&regulator_list_mutex);
if (ret != 0) {
- rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
- config->ena_gpio, ret);
+ rdev_err(rdev, "Failed to request enable GPIO: %d\n",
+ ret);
goto clean;
}
/* The regulator core took over the GPIO descriptor */
diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
index 389bcaf7900f..e511e9d1cc86 100644
--- a/include/linux/regulator/driver.h
+++ b/include/linux/regulator/driver.h
@@ -401,13 +401,7 @@ struct regulator_desc {
* NULL).
* @regmap: regmap to use for core regmap helpers if dev_get_regmap() is
* insufficient.
- * @ena_gpio_initialized: GPIO controlling regulator enable was properly
- * initialized, meaning that >= 0 is a valid gpio
- * identifier and < 0 is a non existent gpio.
- * @ena_gpio: GPIO controlling regulator enable.
- * @ena_gpiod: GPIO descriptor controlling regulator enable.
- * @ena_gpio_invert: Sense for GPIO enable control.
- * @ena_gpio_flags: Flags to use when calling gpio_request_one()
+ * @ena_gpiod: GPIO controlling regulator enable.
*/
struct regulator_config {
struct device *dev;
@@ -416,11 +410,7 @@ struct regulator_config {
struct device_node *of_node;
struct regmap *regmap;

- bool ena_gpio_initialized;
- int ena_gpio;
struct gpio_desc *ena_gpiod;
- unsigned int ena_gpio_invert:1;
- unsigned int ena_gpio_flags;
};

/*
--
2.20.1
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