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path: root/drivers/phy
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-rw-r--r--drivers/phy/phy-samsung-usb2.c25
-rw-r--r--drivers/phy/phy-samsung-usb2.h2
2 files changed, 25 insertions, 2 deletions
diff --git a/drivers/phy/phy-samsung-usb2.c b/drivers/phy/phy-samsung-usb2.c
index f278a9c547e1..1d22d93b552d 100644
--- a/drivers/phy/phy-samsung-usb2.c
+++ b/drivers/phy/phy-samsung-usb2.c
@@ -27,6 +27,13 @@ static int samsung_usb2_phy_power_on(struct phy *phy)
dev_dbg(drv->dev, "Request to power_on \"%s\" usb phy\n",
inst->cfg->label);
+
+ if (drv->vbus) {
+ ret = regulator_enable(drv->vbus);
+ if (ret)
+ goto err_regulator;
+ }
+
ret = clk_prepare_enable(drv->clk);
if (ret)
goto err_main_clk;
@@ -48,6 +55,9 @@ err_power_on:
err_instance_clk:
clk_disable_unprepare(drv->clk);
err_main_clk:
+ if (drv->vbus)
+ regulator_disable(drv->vbus);
+err_regulator:
return ret;
}
@@ -55,7 +65,7 @@ static int samsung_usb2_phy_power_off(struct phy *phy)
{
struct samsung_usb2_phy_instance *inst = phy_get_drvdata(phy);
struct samsung_usb2_phy_driver *drv = inst->drv;
- int ret;
+ int ret = 0;
dev_dbg(drv->dev, "Request to power_off \"%s\" usb phy\n",
inst->cfg->label);
@@ -68,7 +78,10 @@ static int samsung_usb2_phy_power_off(struct phy *phy)
}
clk_disable_unprepare(drv->ref_clk);
clk_disable_unprepare(drv->clk);
- return 0;
+ if (drv->vbus)
+ ret = regulator_disable(drv->vbus);
+
+ return ret;
}
static const struct phy_ops samsung_usb2_phy_ops = {
@@ -203,6 +216,14 @@ static int samsung_usb2_phy_probe(struct platform_device *pdev)
return ret;
}
+ drv->vbus = devm_regulator_get(dev, "vbus");
+ if (IS_ERR(drv->vbus)) {
+ ret = PTR_ERR(drv->vbus);
+ if (ret == -EPROBE_DEFER)
+ return ret;
+ drv->vbus = NULL;
+ }
+
for (i = 0; i < drv->cfg->num_phys; i++) {
char *label = drv->cfg->phys[i].label;
struct samsung_usb2_phy_instance *p = &drv->instances[i];
diff --git a/drivers/phy/phy-samsung-usb2.h b/drivers/phy/phy-samsung-usb2.h
index 44bead9b8f34..6563e7ca0ac4 100644
--- a/drivers/phy/phy-samsung-usb2.h
+++ b/drivers/phy/phy-samsung-usb2.h
@@ -17,6 +17,7 @@
#include <linux/device.h>
#include <linux/regmap.h>
#include <linux/spinlock.h>
+#include <linux/regulator/consumer.h>
#define KHZ 1000
#define MHZ (KHZ * KHZ)
@@ -37,6 +38,7 @@ struct samsung_usb2_phy_driver {
const struct samsung_usb2_phy_config *cfg;
struct clk *clk;
struct clk *ref_clk;
+ struct regulator *vbus;
unsigned long ref_rate;
u32 ref_reg_val;
struct device *dev;