linux-kernel - Re: [PATCH 4/4] extcon: gpio: Add support for using cable names

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Message-ID: <20141103163936.GO27425@saruman>
Date:	Mon, 3 Nov 2014 10:39:36 -0600
From:	Felipe Balbi <balbi@...COM>
To:	Felipe Balbi <balbi@...COM>
CC:	<myungjoo.ham@...sung.com>, <cw00.choi@...sung.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	<nsekhar@...COM>, <grant.likely@...aro.org>,
	George Cherian <george.cherian@...COM>
Subject: Re: [PATCH 4/4] extcon: gpio: Add support for using cable names

On Mon, Nov 03, 2014 at 10:32:30AM -0600, Felipe Balbi wrote:
> From: George Cherian <george.cherian@...com>
> 
> Add support for using cable names. Enables other drivers to register interest
> and get notified using extcon provided notifier call backs.
> 
> Signed-off-by: George Cherian <george.cherian@...com>
> Signed-off-by: Sekhar Nori <nsekhar@...com>

Signed-off-by: Felipe Balbi <balbi@...com>

> ---
>  Documentation/devicetree/bindings/extcon/extcon-gpio.txt | 2 ++
>  drivers/extcon/extcon-gpio.c                             | 4 ++++
>  2 files changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/extcon/extcon-gpio.txt b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
> index 5fe6846..f19aeb4 100644
> --- a/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
> +++ b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
> @@ -7,6 +7,7 @@ Required Properties:
>   - compatible: should be:
>     * "linux,extcon-gpio"
>   - gpios: specifies the gpio pin used.
> + - cable-name: Name of the cable used.
>  
>  Optional Properties:
>   - debounce: Debounce time for GPIO IRQ in ms
> @@ -18,4 +19,5 @@ Eg:
>  		compatible = "linux,extcon-gpio";
>  		gpios = <&gpio3 12 GPIO_ACTIVE_HIGH>;
>  		debounce = <20>;
> +		cable-name = "USB-HOST";
>  	};
> diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
> index 7191d28..cbe35af 100644
> --- a/drivers/extcon/extcon-gpio.c
> +++ b/drivers/extcon/extcon-gpio.c
> @@ -42,6 +42,7 @@ struct gpio_extcon_data {
>  	struct delayed_work work;
>  	unsigned long debounce_jiffies;
>  	bool check_on_resume;
> +	const char *cable_name[1];
>  };
>  
>  static void gpio_extcon_work(struct work_struct *work)
> @@ -112,6 +113,9 @@ static int gpio_extcon_probe(struct platform_device *pdev)
>  		of_property_read_u32(np, "debounce", &debounce);
>  		irq = gpiod_to_irq(extcon_data->gpiod);
>  		irq_flags = irq_get_trigger_type(irq);
> +		of_property_read_string_index(np, "cable-name", 0,
> +					      extcon_data->cable_name);
> +		extcon_data->edev->supported_cable = extcon_data->cable_name;
>  	} else {
>  		if (!pdata)
>  			return -EBUSY;
> -- 
> 2.1.0.GIT
> 
> --
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-- 
balbi

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