[PATCH 5/5 v8] regulator: core: Only support passing enable GPIO descriptors

[Linus Walleij]

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.

Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
---
ChangeLog v7->v8:
- Rebase on recent fixes on the for-4.21 branch.
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 8f3aa151bb72..dc639548076e 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>
@@ -2221,35 +2220,19 @@ 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);
@@ -2272,7 +2255,6 @@ 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;
@@ -4966,15 +4948,13 @@ 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;
 };
 
 /*
-- 
2.19.2