The difference between a regular fixed regulator and a GPIO power load
switch is the fact that the latter may be controlled from user space.
Reuse the fixed regulator driver to support power switches.
Signed-off-by: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
---
drivers/regulator/fixed.c | 33 +++++++++++++++++++++++++--------
1 file changed, 25 insertions(+), 8 deletions(-)
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 988a747..f125a3e 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -31,6 +31,8 @@
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/machine.h>
+#define REG_FIXED_POWER_SWITCH BIT(0)
+
struct fixed_voltage_data {
struct regulator_desc desc;
struct regulator_dev *dev;
@@ -97,11 +99,27 @@ of_get_fixed_voltage_config(struct device *dev,
static struct regulator_ops fixed_voltage_ops = {
};
+#if defined(CONFIG_OF)
+static const struct of_device_id fixed_of_match[] = {
+ {
+ .compatible = "regulator-fixed",
+ },
+ {
+ .compatible = "gpio-power-switch",
+ .data = (void *)REG_FIXED_POWER_SWITCH,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, fixed_of_match);
+#endif
+
static int reg_fixed_voltage_probe(struct platform_device *pdev)
{
struct fixed_voltage_config *config;
struct fixed_voltage_data *drvdata;
struct regulator_config cfg = { };
+ const struct of_device_id *of_id;
+ long flags = 0;
int ret;
drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),
@@ -175,6 +193,13 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
cfg.driver_data = drvdata;
cfg.of_node = pdev->dev.of_node;
+ of_id = of_match_node(fixed_of_match, pdev->dev.of_node);
+ if (of_id)
+ flags = (long)of_id->data;
+
+ if (flags & REG_FIXED_POWER_SWITCH)
+ drvdata->desc.userspace_control = 1;
+
drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc,
&cfg);
if (IS_ERR(drvdata->dev)) {
@@ -191,14 +216,6 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
return 0;
}
-#if defined(CONFIG_OF)
-static const struct of_device_id fixed_of_match[] = {
- { .compatible = "regulator-fixed", },
- {},
-};
-MODULE_DEVICE_TABLE(of, fixed_of_match);
-#endif
-
static struct platform_driver regulator_fixed_voltage_driver = {
.probe = reg_fixed_voltage_probe,
.driver = {
--
2.9.3
--
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