linux-kernel - [PATCH 12/12] usb: phy: ab8500-usb: call phy_dis

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Message-Id: <1364978713-19612-13-git-send-email-fabio.baltieri@linaro.org>
Date:	Wed,  3 Apr 2013 10:45:13 +0200
From:	Fabio Baltieri <fabio.baltieri@...aro.org>
To:	Felipe Balbi <balbi@...com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Praveena Nadahally <praveen.nadahally@...ricsson.com>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	Sakethram Bommisetti <sakethram.bommisetti@...ricsson.com>,
	Fabio Baltieri <fabio.baltieri@...aro.org>
Subject: [PATCH 12/12] usb: phy: ab8500-usb: call phy_dis_work only when necessary

From: Sakethram Bommisetti <sakethram.bommisetti@...ricsson.com>

Modify ab8500_usb_set_peripheral() and ab8500_usb_set_host() code to
schedule phy_dis_work only when necessary in order to prevent regulator
count mismatch during reboot/shutdown.

Signed-off-by: Sakethram Bommisetti <sakethram.bommisetti@...ricsson.com>
Acked-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@...aro.org>
---
 drivers/usb/phy/phy-ab8500-usb.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c
index 30adfee..81d1a5a 100644
--- a/drivers/usb/phy/phy-ab8500-usb.c
+++ b/drivers/usb/phy/phy-ab8500-usb.c
@@ -613,17 +613,16 @@ static int ab8500_usb_set_peripheral(struct usb_otg *otg,
 
 	ab = phy_to_ab(otg->phy);
 
+	ab->phy.otg->gadget = gadget;
+
 	/* Some drivers call this function in atomic context.
 	 * Do not update ab8500 registers directly till this
 	 * is fixed.
 	 */
 
-	if (!gadget) {
-		otg->gadget = NULL;
+	if ((ab->mode != USB_IDLE) && (!gadget)) {
+		ab->mode = USB_IDLE;
 		schedule_work(&ab->phy_dis_work);
-	} else {
-		otg->gadget = gadget;
-		otg->phy->state = OTG_STATE_B_IDLE;
 	}
 
 	return 0;
@@ -638,16 +637,16 @@ static int ab8500_usb_set_host(struct usb_otg *otg, struct usb_bus *host)
 
 	ab = phy_to_ab(otg->phy);
 
+	ab->phy.otg->host = host;
+
 	/* Some drivers call this function in atomic context.
 	 * Do not update ab8500 registers directly till this
 	 * is fixed.
 	 */
 
-	if (!host) {
-		otg->host = NULL;
+	if ((ab->mode != USB_IDLE) && (!host)) {
+		ab->mode = USB_IDLE;
 		schedule_work(&ab->phy_dis_work);
-	} else {
-		otg->host = host;
 	}
 
 	return 0;
-- 
1.8.1.3

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