+static void twl4030_usb_ldo_init(struct twl4030_usb *twl)
+{
+ /* Enable writing to power configuration registers */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0xC0, PROTECT_KEY);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0x0C, PROTECT_KEY);
+
+ /* put VUSB3V1 LDO in active state */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB_DEDICATED2);
+
+ /* input to VUSB3V1 LDO is from VBAT, not VBUS */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x14, VUSB_DEDICATED1);
+
+ /* turn on 3.1V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB3V1_DEV_GRP);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_TYPE);
+
+ /* turn on 1.5V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V5_DEV_GRP);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_TYPE);
+
+ /* turn on 1.8V regulator */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0x20, VUSB1V8_DEV_GRP);
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
+
+ /* disable access to power configuration registers */
+ twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, PROTECT_KEY);
+}
+
+static irqreturn_t twl4030_usb_irq(int irq, void *_twl)
+{
+ int ret = IRQ_NONE;
+ u8 val;
+
+ if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_ISR1) < 0) {
+ printk(KERN_ERR "twl4030_usb: i2c read failed,"
+ " line %d\n", __LINE__);
+ goto done;
+ }
+
+ /* this interrupt line may be shared */
+ if (!(val & USB_PRES))
+ goto done;
+
+ /* clear the interrupt */
+ twl4030_i2c_write_u8(TWL4030_MODULE_INT, USB_PRES, REG_PWR_ISR1);
+
+ /* action based on cable attach or detach */
+ if (twl4030_i2c_read_u8(TWL4030_MODULE_INT, &val, REG_PWR_EDR1) < 0) {
+ printk(KERN_ERR "twl4030_usb: i2c read failed,"
+ " line %d\n", __LINE__);
+ goto done;
+ }
+
+ if (val & USB_PRES_RISING)
+ twl4030_phy_resume();
+ else
+ twl4030_phy_suspend(0);
+
+ ret = IRQ_HANDLED;
+
+done:
+ return ret;
+}
+