linux-kernel - Re: [PATCH] Input: trackpoint: add new trackpoint firmware ID

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Date:   Sun, 12 Feb 2017 14:38:59 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Aaron Ma <aaron.ma@...onical.com>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andrew Duggan <aduggan@...aptics.com>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>
Subject: Re: [PATCH] Input: trackpoint: add new trackpoint firmware ID

On Fri, Feb 10, 2017 at 11:02:21AM +0800, Aaron Ma wrote:
> Synaptics add new TP firmware ID: 0x2 and 0x3, for now both lower 2 bits
> are indicated as TP. Change the constant to bitwise values.

Hmm, I thought IBM/Lenovo owned trackpoint support... Andrew, is it
yours now?

Aaron, what devices have these new trackpoints>?

Thanks.

> 
> Signed-off-by: Aaron Ma <aaron.ma@...onical.com>
> Cc: stable@...r.kernel.org
> ---
>  drivers/input/mouse/trackpoint.c | 3 ++-
>  drivers/input/mouse/trackpoint.h | 3 ++-
>  2 files changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
> index 7331084..9ff0f38 100644
> --- a/drivers/input/mouse/trackpoint.c
> +++ b/drivers/input/mouse/trackpoint.c
> @@ -265,7 +265,8 @@ static int trackpoint_start_protocol(struct psmouse *psmouse, unsigned char *fir
>  	if (ps2_command(&psmouse->ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
>  		return -1;
>  
> -	if (param[0] != TP_MAGIC_IDENT)
> +	/* add new TP ID. */
> +	if (!(param[0] & TP_MAGIC_IDENT))
>  		return -1;
>  
>  	if (firmware_id)
> diff --git a/drivers/input/mouse/trackpoint.h b/drivers/input/mouse/trackpoint.h
> index 5617ed3..8805575 100644
> --- a/drivers/input/mouse/trackpoint.h
> +++ b/drivers/input/mouse/trackpoint.h
> @@ -21,8 +21,9 @@
>  #define TP_COMMAND		0xE2	/* Commands start with this */
>  
>  #define TP_READ_ID		0xE1	/* Sent for device identification */
> -#define TP_MAGIC_IDENT		0x01	/* Sent after a TP_READ_ID followed */
> +#define TP_MAGIC_IDENT		0x03	/* Sent after a TP_READ_ID followed */
>  					/* by the firmware ID */
> +					/* Firmware ID includes 0x1, 0x2, 0x3 */
>  
>  
>  /*
> -- 
> 2.9.3
> 

-- 
Dmitry