linux-kernel - Re: [PATCH v3] Input: atmel_mxt_ts - Report pressure information from the driver

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Message-ID: <20110816052738.GA25878@polaris.bitmath.org>
Date:	Tue, 16 Aug 2011 07:27:38 +0200
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Yufeng Shen <miletus@...omium.org>
Cc:	linux-input@...r.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Iiro Valkonen <iiro.valkonen@...el.com>,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	linux-kernel@...r.kernel.org,
	Michael Gong <Michael.Gong@...el.com>,
	Alan Bowens <Alan.Bowens@...el.com>
Subject: Re: [PATCH v3] Input: atmel_mxt_ts - Report pressure information
 from the driver

On Mon, Aug 15, 2011 at 11:02:30AM -0400, Yufeng Shen wrote:
> Atmel mxt1386 touch controller has the touch pressure information but
> the current driver atmel_mxt_ts does not expose it to the user space.
> This patch makes the driver report the touch pressure information to
> user space.
> 
> ChangeLog:
> v2: fixed indentation as commented by Wanlong Gao
> v3: added signed-off-by
> 
> Change-Id: Ie0e4683a3cd5ec79222f7682b0ddc24f909af543
> Signed-off-by: Yufeng Shen <miletus@...omium.org>
> ---
>  drivers/input/touchscreen/atmel_mxt_ts.c |    8 ++++++++
>  1 files changed, 8 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
> index ae00604..9bdf4e0 100644
> --- a/drivers/input/touchscreen/atmel_mxt_ts.c
> +++ b/drivers/input/touchscreen/atmel_mxt_ts.c
> @@ -244,6 +244,7 @@ struct mxt_finger {
>  	int x;
>  	int y;
>  	int area;
> +	int pressure;
>  };
>  
>  /* Each client has this additional data */
> @@ -536,6 +537,8 @@ static void mxt_input_report(struct mxt_data *data, int single_id)
>  					finger[id].x);
>  			input_report_abs(input_dev, ABS_MT_POSITION_Y,
>  					finger[id].y);
> +			input_report_abs(input_dev, ABS_MT_PRESSURE,
> +					finger[id].pressure);
>  		} else {
>  			finger[id].status = 0;
>  		}
> @@ -560,6 +563,7 @@ static void mxt_input_touchevent(struct mxt_data *data,
>  	int x;
>  	int y;
>  	int area;
> +	int pressure;
>  
>  	/* Check the touch is present on the screen */
>  	if (!(status & MXT_DETECT)) {
> @@ -584,6 +588,7 @@ static void mxt_input_touchevent(struct mxt_data *data,
>  		y = y >> 2;
>  
>  	area = message->message[4];
> +	pressure = message->message[5];
>  
>  	dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
>  		status & MXT_MOVE ? "moved" : "pressed",
> @@ -594,6 +599,7 @@ static void mxt_input_touchevent(struct mxt_data *data,
>  	finger[id].x = x;
>  	finger[id].y = y;
>  	finger[id].area = area;
> +	finger[id].pressure = pressure;
>  
>  	mxt_input_report(data, id);
>  }
> @@ -1125,6 +1131,8 @@ static int __devinit mxt_probe(struct i2c_client *client,
>  			     0, data->max_x, 0, 0);
>  	input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
>  			     0, data->max_y, 0, 0);
> +	input_set_abs_params(input_dev, ABS_MT_PRESSURE,
> +			     0, 255, 0, 0);
>  
>  	input_set_drvdata(input_dev, data);
>  	i2c_set_clientdata(client, data);
> -- 
> 1.7.3.1
> 

    Acked-by: Henrik Rydberg <rydberg@...omail.se>

Thanks,
Henrik
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