Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (97 commits)
  USB: qcserial: add device id for HP devices
  USB: isp1760: Add a delay before reading the SKIPMAP registers in isp1760-hcd.c
  USB: allow malformed LANGID descriptors
  USB: pxa27x_udc: typo fixes and code cleanups
  USB: gadget: gadget zero uses new suspend/resume hooks
  USB: gadget: composite device-level suspend/resume hooks
  USB: r8a66597-hcd: suspend/resume support
  USB: more u32 conversion after transfer_buffer_length and actual_length
  USB: Fix cp2101 USB serial device driver termios functions for console use
  USB: CP2101 New Device ID
  USB: ipaq: handle 4 endpoint devices
  USB: S3C: Move usb-control.h to platform include
  USB: ohci-hcd: Add ARCH_S3C24XX to the ohci-s3c2410.c glue
  USB: pedantic: spelling correction in comment for ch9.h
  USB: host: fix sparse warning: Using plain integer as NULL pointer
  USB: ohci-s3c2410: fix name of bus clock
  USB: ohci-s3c2410: remove <mach/hardware.h> include
  USB: serial: rename cp2101 driver to cp210x
  USB: CP2101 Reduce Error Logging
  USB: CP2101 Support AN205 baud rates
  ...

1 files changed, 64 insertions, 9 deletions

diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index 416e4410be0..d9478d0e1c8 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -34,6 +34,8 @@
 #include <linux/delay.h>
 #include <linux/usb/otg.h>
 #include <linux/i2c/twl4030.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
 
 
 /* Register defines */
@@ -246,6 +248,11 @@ struct twl4030_usb {
 	struct otg_transceiver	otg;
 	struct device		*dev;
 
+	/* TWL4030 internal USB regulator supplies */
+	struct regulator	*usb1v5;
+	struct regulator	*usb1v8;
+	struct regulator	*usb3v1;
+
 	/* for vbus reporting with irqs disabled */
 	spinlock_t		lock;
 
@@ -434,6 +441,18 @@ static void twl4030_phy_power(struct twl4030_usb *twl, int on)
 
 	pwr = twl4030_usb_read(twl, PHY_PWR_CTRL);
 	if (on) {
+		regulator_enable(twl->usb3v1);
+		regulator_enable(twl->usb1v8);
+		/*
+		 * Disabling usb3v1 regulator (= writing 0 to VUSB3V1_DEV_GRP
+		 * in twl4030) resets the VUSB_DEDICATED2 register. This reset
+		 * enables VUSB3V1_SLEEP bit that remaps usb3v1 ACTIVE state to
+		 * SLEEP. We work around this by clearing the bit after usv3v1
+		 * is re-activated. This ensures that VUSB3V1 is really active.
+		 */
+		twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0,
+							VUSB_DEDICATED2);
+		regulator_enable(twl->usb1v5);
 		pwr &= ~PHY_PWR_PHYPWD;
 		WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
 		twl4030_usb_write(twl, PHY_CLK_CTRL,
@@ -443,6 +462,9 @@ static void twl4030_phy_power(struct twl4030_usb *twl, int on)
 	} else  {
 		pwr |= PHY_PWR_PHYPWD;
 		WARN_ON(twl4030_usb_write_verify(twl, PHY_PWR_CTRL, pwr) < 0);
+		regulator_disable(twl->usb1v5);
+		regulator_disable(twl->usb1v8);
+		regulator_disable(twl->usb3v1);
 	}
 }
 
@@ -468,7 +490,7 @@ static void twl4030_phy_resume(struct twl4030_usb *twl)
 	twl->asleep = 0;
 }
 
-static void twl4030_usb_ldo_init(struct twl4030_usb *twl)
+static int 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);
@@ -480,20 +502,45 @@ static void twl4030_usb_ldo_init(struct twl4030_usb *twl)
 	/* 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);
+	/* Initialize 3.1V regulator */
+	twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB3V1_DEV_GRP);
+
+	twl->usb3v1 = regulator_get(twl->dev, "usb3v1");
+	if (IS_ERR(twl->usb3v1))
+		return -ENODEV;
+
 	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);
+	/* Initialize 1.5V regulator */
+	twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V5_DEV_GRP);
+
+	twl->usb1v5 = regulator_get(twl->dev, "usb1v5");
+	if (IS_ERR(twl->usb1v5))
+		goto fail1;
+
 	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);
+	/* Initialize 1.8V regulator */
+	twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_DEV_GRP);
+
+	twl->usb1v8 = regulator_get(twl->dev, "usb1v8");
+	if (IS_ERR(twl->usb1v8))
+		goto fail2;
+
 	twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER, 0, VUSB1V8_TYPE);
 
 	/* disable access to power configuration registers */
 	twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, PROTECT_KEY);
+
+	return 0;
+
+fail2:
+	regulator_put(twl->usb1v5);
+	twl->usb1v5 = NULL;
+fail1:
+	regulator_put(twl->usb3v1);
+	twl->usb3v1 = NULL;
+	return -ENODEV;
 }
 
 static ssize_t twl4030_usb_vbus_show(struct device *dev,
@@ -598,7 +645,7 @@ static int __init twl4030_usb_probe(struct platform_device *pdev)
 {
 	struct twl4030_usb_data *pdata = pdev->dev.platform_data;
 	struct twl4030_usb	*twl;
-	int			status;
+	int			status, err;
 
 	if (!pdata) {
 		dev_dbg(&pdev->dev, "platform_data not available\n");
@@ -622,7 +669,12 @@ static int __init twl4030_usb_probe(struct platform_device *pdev)
 	/* init spinlock for workqueue */
 	spin_lock_init(&twl->lock);
 
-	twl4030_usb_ldo_init(twl);
+	err = twl4030_usb_ldo_init(twl);
+	if (err) {
+		dev_err(&pdev->dev, "ldo init failed\n");
+		kfree(twl);
+		return err;
+	}
 	otg_set_transceiver(&twl->otg);
 
 	platform_set_drvdata(pdev, twl);
@@ -688,6 +740,9 @@ static int __exit twl4030_usb_remove(struct platform_device *pdev)
 	twl4030_usb_clear_bits(twl, POWER_CTRL, POWER_CTRL_OTG_ENAB);
 
 	twl4030_phy_power(twl, 0);
+	regulator_put(twl->usb1v5);
+	regulator_put(twl->usb1v8);
+	regulator_put(twl->usb3v1);
 
 	kfree(twl);