From: Chanwoo Choi <cw00.choi@samsung.com>
To: linux-kernel@vger.kernel.org
Cc: rogerq@ti.com, r.baldyga@samsung.com, peter.chen@freescale.com,
        kishon@ti.com, balbi@ti.com, iivanov@mm-sol.com, cw00.choi@samsung.com,
        myungjoo.ham@samsung.com
Subject: [PATCH 2/2] extcon: usb-gpio: Update the ID pin state of USB when
 cable state is changed
Date: Fri, 22 May 2015 19:49:50 +0900
Message-id: <1432291790-4933-3-git-send-email-cw00.choi@samsung.com>
In-reply-to: <1432291790-4933-1-git-send-email-cw00.choi@samsung.com>
References: <1432291790-4933-1-git-send-email-cw00.choi@samsung.com>
DLP-Filter: Pass
Sender: linux-kernel-owner@vger.kernel.org
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Lines: 44

This patch updates the ID pin state of USB when cable state is changed
by using the extcon_set_cable_line_state() function. The extcon consumer driver
can receive the changed ID pin state through registered notifier chain of
extcon consumer driver.

Cc: Roger Quadros <rogerq@ti.com>
Cc: Robert Baldyga <r.baldyga@samsung.com>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
 drivers/extcon/extcon-usb-gpio.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c
index 14da94c..9ff3171 100644
--- a/drivers/extcon/extcon-usb-gpio.c
+++ b/drivers/extcon/extcon-usb-gpio.c
@@ -62,12 +62,18 @@ static void usb_extcon_detect_cable(struct work_struct *work)
 		 */
 		extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, false);
 		extcon_set_cable_state_(info->edev, EXTCON_USB, true);
+
+		extcon_set_cable_line_state(info->edev, EXTCON_USB,
+						EXTCON_USB_ID_HIGH);
 	} else {
 		/*
 		 * ID = 0 means USB HOST cable attached.
 		 * As we don't have event for USB peripheral cable detached,
 		 * we simulate USB peripheral detach here.
 		 */
+		extcon_set_cable_line_state(info->edev, EXTCON_USB,
+						EXTCON_USB_ID_LOW);
+
 		extcon_set_cable_state_(info->edev, EXTCON_USB, false);
 		extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, true);
 	}
-- 
1.8.5.5

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