linux-kernel - Re: [PATCH v2 2/2] extcon: usb-gpio: Update the ID pin state of USB when cable state is changed

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Date:	Wed, 27 May 2015 17:40:56 +0300
From:	Roger Quadros <rogerq@...com>
To:	Chanwoo Choi <cwchoi00@...il.com>, <linux-kernel@...r.kernel.org>
CC:	<r.baldyga@...sung.com>, <peter.chen@...escale.com>,
	<kishon@...com>, <balbi@...com>, <iivanov@...sol.com>,
	<cw00.choi@...sung.com>, <myungjoo.ham@...sung.com>
Subject: Re: [PATCH v2 2/2] extcon: usb-gpio: Update the ID pin state of USB
 when cable state is changed

On 27/05/15 15:15, Chanwoo Choi wrote:
> 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@...com>
> Cc: Robert Baldyga <r.baldyga@...sung.com>
> Cc: MyungJoo Ham <myungjoo.ham@...sung.com>
> Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>

Acked-by: Roger Quadros <rogerq@...com>

cheers,
-roger

> ---
>   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);
>   	}
>
--
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