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-rw-r--r--drivers/power/twl4030_charger.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c
index 0511610b235f..bbda08377a42 100644
--- a/drivers/power/twl4030_charger.c
+++ b/drivers/power/twl4030_charger.c
@@ -21,6 +21,7 @@
#include <linux/power_supply.h>
#include <linux/notifier.h>
#include <linux/usb/otg.h>
+#include <linux/regulator/machine.h>
#define TWL4030_BCIMSTATEC 0x02
#define TWL4030_BCIICHG 0x08
@@ -86,6 +87,8 @@ struct twl4030_bci {
struct work_struct work;
int irq_chg;
int irq_bci;
+ struct regulator *usb_reg;
+ int usb_enabled;
unsigned long event;
};
@@ -183,6 +186,12 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
return -EACCES;
}
+ /* Need to keep regulator on */
+ if (!bci->usb_enabled) {
+ regulator_enable(bci->usb_reg);
+ bci->usb_enabled = 1;
+ }
+
/* forcing the field BCIAUTOUSB (BOOT_BCI[1]) to 1 */
ret = twl4030_clear_set_boot_bci(0, TWL4030_BCIAUTOUSB);
if (ret < 0)
@@ -193,6 +202,10 @@ static int twl4030_charger_enable_usb(struct twl4030_bci *bci, bool enable)
TWL4030_USBFASTMCHG, TWL4030_BCIMFSTS4);
} else {
ret = twl4030_clear_set_boot_bci(TWL4030_BCIAUTOUSB, 0);
+ if (bci->usb_enabled) {
+ regulator_disable(bci->usb_reg);
+ bci->usb_enabled = 0;
+ }
}
return ret;
@@ -511,6 +524,8 @@ static int __init twl4030_bci_probe(struct platform_device *pdev)
bci->usb.num_properties = ARRAY_SIZE(twl4030_charger_props);
bci->usb.get_property = twl4030_bci_get_property;
+ bci->usb_reg = regulator_get(bci->dev, "bci3v1");
+
ret = power_supply_register(&pdev->dev, &bci->usb);
if (ret) {
dev_err(&pdev->dev, "failed to register usb: %d\n", ret);