regulator: tps65090: add external control support for DCDC
The TPS65090's DCDC output can also be enable/disable through the
external digital input signal. Add support for enable/disable
either through register access via I2C or through external
control inputs. The external control inputs can be driven through
GPIOs also and hence adding support for passing the GPIO number.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/regulator/tps65090-regulator.c b/drivers/regulator/tps65090-regulator.c
index 0732d9b..41241383 100644
--- a/drivers/regulator/tps65090-regulator.c
+++ b/drivers/regulator/tps65090-regulator.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
@@ -31,10 +32,13 @@
struct regulator_dev *rdev;
};
-static struct regulator_ops tps65090_ops = {
- .enable = regulator_enable_regmap,
- .disable = regulator_disable_regmap,
- .is_enabled = regulator_is_enabled_regmap,
+static struct regulator_ops tps65090_ext_control_ops = {
+};
+
+static struct regulator_ops tps65090_reg_contol_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
};
static struct regulator_ops tps65090_ldo_ops = {
@@ -53,16 +57,16 @@
}
static struct regulator_desc tps65090_regulator_desc[] = {
- tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, tps65090_ops),
- tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, tps65090_ops),
- tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, tps65090_ops),
- tps65090_REG_DESC(FET1, "infet1", 0x0F, tps65090_ops),
- tps65090_REG_DESC(FET2, "infet2", 0x10, tps65090_ops),
- tps65090_REG_DESC(FET3, "infet3", 0x11, tps65090_ops),
- tps65090_REG_DESC(FET4, "infet4", 0x12, tps65090_ops),
- tps65090_REG_DESC(FET5, "infet5", 0x13, tps65090_ops),
- tps65090_REG_DESC(FET6, "infet6", 0x14, tps65090_ops),
- tps65090_REG_DESC(FET7, "infet7", 0x15, tps65090_ops),
+ tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(FET1, "infet1", 0x0F, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(FET2, "infet2", 0x10, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(FET3, "infet3", 0x11, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(FET4, "infet4", 0x12, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(FET5, "infet5", 0x13, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(FET6, "infet6", 0x14, tps65090_reg_contol_ops),
+ tps65090_REG_DESC(FET7, "infet7", 0x15, tps65090_reg_contol_ops),
tps65090_REG_DESC(LDO1, "vsys_l1", 0, tps65090_ldo_ops),
tps65090_REG_DESC(LDO2, "vsys_l2", 0, tps65090_ldo_ops),
};
@@ -118,6 +122,22 @@
return tps65090_config_ext_control(ri, false);
}
+static void __devinit tps65090_configure_regulator_config(
+ struct tps65090_regulator_plat_data *tps_pdata,
+ struct regulator_config *config)
+{
+ if (gpio_is_valid(tps_pdata->gpio)) {
+ int gpio_flag = GPIOF_OUT_INIT_LOW;
+
+ if (tps_pdata->reg_init_data->constraints.always_on ||
+ tps_pdata->reg_init_data->constraints.boot_on)
+ gpio_flag = GPIOF_OUT_INIT_HIGH;
+
+ config->ena_gpio = tps_pdata->gpio;
+ config->ena_gpio_flags = gpio_flag;
+ }
+}
+
static int __devinit tps65090_regulator_probe(struct platform_device *pdev)
{
struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent);
@@ -154,18 +174,24 @@
/*
* TPS5090 DCDC support the control from external digital input.
- * It may be possible that during boot, the external control is
- * enabled. Disabling external control for DCDC.
+ * Configure it as per platform data.
*/
if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) {
- ret = tps65090_regulator_disable_ext_control(
+ if (tps_pdata->enable_ext_control) {
+ tps65090_configure_regulator_config(
+ tps_pdata, &config);
+ ri->desc->ops = &tps65090_ext_control_ops;
+ } else {
+ ret = tps65090_regulator_disable_ext_control(
ri, tps_pdata);
- if (ret < 0) {
- dev_err(&pdev->dev,
+ if (ret < 0) {
+ dev_err(&pdev->dev,
"failed disable ext control\n");
- goto scrub;
+ goto scrub;
+ }
}
}
+
config.dev = &pdev->dev;
config.driver_data = ri;
config.regmap = tps65090_mfd->rmap;
@@ -182,6 +208,17 @@
goto scrub;
}
ri->rdev = rdev;
+
+ /* Enable external control if it is require */
+ if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data &&
+ tps_pdata->enable_ext_control) {
+ ret = tps65090_config_ext_control(ri, true);
+ if (ret < 0) {
+ /* Increment num to get unregister rdev */
+ num++;
+ goto scrub;
+ }
+ }
}
platform_set_drvdata(pdev, pmic);