From: Kalliguddi, Hema <hemahk@xxxxxx>
Remove the regulator enable while driver loading and enable it only when
the cable/device is connected and disable it when disconnected.
Remove the configuration of config_state and config_trans register
configuration as these registers are programmed when regulator
enable/disable is called.
Signed-off-by: Hema HK <hemahk@xxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/otg/twl6030-usb.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)
Index: linux-2.6/drivers/usb/otg/twl6030-usb.c
===================================================================
--- linux-2.6.orig/drivers/usb/otg/twl6030-usb.c
+++ linux-2.6/drivers/usb/otg/twl6030-usb.c
@@ -158,8 +158,6 @@ static int twl6030_phy_init(struct otg_t
dev = twl->dev;
pdata = dev->platform_data;
- regulator_enable(twl->usb3v3);
-
hw_state = twl6030_readb(twl, TWL6030_MODULE_ID0, STS_HW_CONDITIONS);
if (hw_state & STS_USB_ID)
@@ -180,7 +178,6 @@ static void twl6030_phy_shutdown(struct
dev = twl->dev;
pdata = dev->platform_data;
pdata->phy_power(twl->dev, 0, 0);
- regulator_disable(twl->usb3v3);
}
static int twl6030_usb_ldo_init(struct twl6030_usb *twl)
@@ -199,16 +196,6 @@ static int twl6030_usb_ldo_init(struct t
if (IS_ERR(twl->usb3v3))
return -ENODEV;
- regulator_enable(twl->usb3v3);
-
- /* Program the VUSB_CFG_TRANS for ACTIVE state. */
- twl6030_writeb(twl, TWL_MODULE_PM_RECEIVER, 0x3F,
- VUSB_CFG_TRANS);
-
- /* Program the VUSB_CFG_STATE register to ON on all groups. */
- twl6030_writeb(twl, TWL_MODULE_PM_RECEIVER, 0xE1,
- VUSB_CFG_STATE);
-
/* Program the USB_VBUS_CTRL_SET and set VBUS_ACT_COMP bit */
twl6030_writeb(twl, TWL_MODULE_USB, 0x4, USB_VBUS_CTRL_SET);
@@ -261,16 +248,23 @@ static irqreturn_t twl6030_usb_irq(int i
CONTROLLER_STAT1);
if (!(hw_state & STS_USB_ID)) {
if (vbus_state & VBUS_DET) {
+ regulator_enable(twl->usb3v3);
+ twl->asleep = 1;
status = USB_EVENT_VBUS;
twl->otg.default_a = false;
twl->otg.state = OTG_STATE_B_IDLE;
+ twl->linkstat = status;
+ blocking_notifier_call_chain(&twl->otg.notifier,
+ status, twl->otg.gadget);
} else {
status = USB_EVENT_NONE;
- }
- if (status >= 0) {
twl->linkstat = status;
blocking_notifier_call_chain(&twl->otg.notifier,
status, twl->otg.gadget);
+ if (twl->asleep) {
+ regulator_disable(twl->usb3v3);
+ twl->asleep = 0;
+ }
}
}
sysfs_notify(&twl->dev->kobj, NULL, "vbus");
@@ -288,6 +282,8 @@ static irqreturn_t twl6030_usbotg_irq(in
if (hw_state & STS_USB_ID) {
+ regulator_enable(twl->usb3v3);
+ twl->asleep = 1;
twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_CLR, 0x1);
twl6030_writeb(twl, TWL_MODULE_USB, USB_ID_INT_EN_HI_SET,
0x10);
@@ -437,6 +433,7 @@ static int __devinit twl6030_usb_probe(s
return status;
}
+ twl->asleep = 0;
pdata->phy_init(dev);
twl6030_enable_irq(&twl->otg);
dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
--
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