regulator: Allow enabling GPIO regulator

Drivers need to be able to enable regulators that may be implemented as
GPIO regulators. Example: fsl_esdhc enables the vqmmc supply which is
commonly implemented as a GPIO regulator in order to switch between I/O
voltage levels.

Signed-off-by: Sven Schwermer <sven@svenschwermer.de>
Reviewed-by: Lukasz Majewski <lukma@denx.de>

diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 30c0a13..337e9e7 100644 (file)
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -120,6 +120,7 @@ config SPL_DM_REGULATOR_FIXED
 config DM_REGULATOR_GPIO
        bool "Enable Driver Model for GPIO REGULATOR"
        depends on DM_REGULATOR && DM_GPIO
+       select DM_REGULATOR_COMMON
        ---help---
        This config enables implementation of driver-model regulator uclass
        features for gpio regulators. The driver implements get/set for
@@ -128,6 +129,7 @@ config DM_REGULATOR_GPIO
 config SPL_DM_REGULATOR_GPIO
        bool "Enable Driver Model for GPIO REGULATOR in SPL"
        depends on DM_REGULATOR_GPIO && SPL_GPIO_SUPPORT
+       select SPL_DM_REGULATOR_COMMON
        ---help---
        This config enables implementation of driver-model regulator uclass
        features for gpio regulators in SPL.

diff --git a/drivers/power/regulator/gpio-regulator.c b/drivers/power/regulator/gpio-regulator.c
index d18e5d8..ec1dcb6 100644 (file)
--- a/drivers/power/regulator/gpio-regulator.c
+++ b/drivers/power/regulator/gpio-regulator.c
@@ -4,6 +4,7 @@
  * Keerthy <j-keerthy@ti.com>
  */
 
+#include "regulator_common.h"
 #include <common.h>
 #include <fdtdec.h>
 #include <errno.h>
@@ -18,6 +19,7 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 struct gpio_regulator_platdata {
+       struct regulator_common_platdata common;
        struct gpio_desc gpio; /* GPIO for regulator voltage control */
        int states[GPIO_REGULATOR_MAX_STATES];
        int voltages[GPIO_REGULATOR_MAX_STATES];
@@ -65,7 +67,7 @@ static int gpio_regulator_ofdata_to_platdata(struct udevice *dev)
                j++;
        }
 
-       return 0;
+       return regulator_common_ofdata_to_platdata(dev, &dev_pdata->common, "enable-gpios");
 }
 
 static int gpio_regulator_get_value(struct udevice *dev)
@@ -116,9 +118,23 @@ static int gpio_regulator_set_value(struct udevice *dev, int uV)
        return 0;
 }
 
+static int gpio_regulator_get_enable(struct udevice *dev)
+{
+       struct gpio_regulator_platdata *dev_pdata = dev_get_platdata(dev);
+       return regulator_common_get_enable(dev, &dev_pdata->common);
+}
+
+static int gpio_regulator_set_enable(struct udevice *dev, bool enable)
+{
+       struct gpio_regulator_platdata *dev_pdata = dev_get_platdata(dev);
+       return regulator_common_set_enable(dev, &dev_pdata->common, enable);
+}
+
 static const struct dm_regulator_ops gpio_regulator_ops = {
        .get_value      = gpio_regulator_get_value,
        .set_value      = gpio_regulator_set_value,
+       .get_enable     = gpio_regulator_get_enable,
+       .set_enable     = gpio_regulator_set_enable,
 };
 
 static const struct udevice_id gpio_regulator_ids[] = {