linux-kernel - [PATCH 3.16 123/357] usb: chipidea: msm: Use USB PHY API to control PHY state

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Date:	Fri,  3 Oct 2014 14:28:29 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Tim Bird <tbird20d@...il.com>,
	Peter Chen <peter.chen@...escale.com>,
	"Ivan T. Ivanov" <iivanov@...sol.com>, Felipe Balbi <balbi@...com>
Subject: [PATCH 3.16 123/357] usb: chipidea: msm: Use USB PHY API to control PHY state

3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Ivan T. Ivanov" <iivanov@...sol.com>

commit ea290056d7c46f7781ff13801048ed957b96d1a5 upstream.

PHY drivers keep track of the current state of the hardware,
so don't change PHY settings under it.

Cc: Tim Bird <tbird20d@...il.com>
Signed-off-by: Peter Chen <peter.chen@...escale.com>
Signed-off-by: Ivan T. Ivanov <iivanov@...sol.com>
Acked-by: Felipe Balbi <balbi@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/chipidea/ci_hdrc_msm.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/drivers/usb/chipidea/ci_hdrc_msm.c
+++ b/drivers/usb/chipidea/ci_hdrc_msm.c
@@ -20,7 +20,6 @@
 static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
 {
 	struct device *dev = ci->gadget.dev.parent;
-	int val;
 
 	switch (event) {
 	case CI_HDRC_CONTROLLER_RESET_EVENT:
@@ -34,10 +33,7 @@ static void ci_hdrc_msm_notify_event(str
 		 * Put the transceiver in non-driving mode. Otherwise host
 		 * may not detect soft-disconnection.
 		 */
-		val = usb_phy_io_read(ci->transceiver, ULPI_FUNC_CTRL);
-		val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
-		val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
-		usb_phy_io_write(ci->transceiver, val, ULPI_FUNC_CTRL);
+		usb_phy_notify_disconnect(ci->transceiver, USB_SPEED_UNKNOWN);
 		break;
 	default:
 		dev_dbg(dev, "unknown ci_hdrc event\n");


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