On 02/07/18 14:00, Florian Echtler wrote:
> This patch adds parameter definitions and module parameters for the four
> userspace controls that the SUR40 can currently provide.
>
> Signed-off-by: Florian Echtler <floe@xxxxxxxxxxxxxx>
> ---
> drivers/input/touchscreen/sur40.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
> index 8375b06..8a5b031 100644
> --- a/drivers/input/touchscreen/sur40.c
> +++ b/drivers/input/touchscreen/sur40.c
> @@ -149,6 +149,34 @@ struct sur40_image_header {
> #define SUR40_TOUCH 0x02
> #define SUR40_TAG 0x04
>
> +/* video controls */
> +#define SUR40_BRIGHTNESS_MAX 0xFF
> +#define SUR40_BRIGHTNESS_MIN 0x00
> +#define SUR40_BRIGHTNESS_DEF 0xFF
> +
> +#define SUR40_CONTRAST_MAX 0x0F
> +#define SUR40_CONTRAST_MIN 0x00
> +#define SUR40_CONTRAST_DEF 0x0A
It's kernel style to use lowercase hex values.
> +
> +#define SUR40_GAIN_MAX 0x09
> +#define SUR40_GAIN_MIN 0x00
> +#define SUR40_GAIN_DEF 0x08
> +
> +#define SUR40_BACKLIGHT_MAX 0x01
> +#define SUR40_BACKLIGHT_MIN 0x00
> +#define SUR40_BACKLIGHT_DEF 0x01
> +
> +/* module parameters */
> +static uint brightness = SUR40_BRIGHTNESS_DEF;
> +module_param(brightness, uint, 0644);
> +MODULE_PARM_DESC(brightness, "set initial brightness");
No range in the param description? I think you can do some macro magic so you
can use the MIN/MAX defines in the string.
Regards,
Hans
> +static uint contrast = SUR40_CONTRAST_DEF;
> +module_param(contrast, uint, 0644);
> +MODULE_PARM_DESC(contrast, "set initial contrast");
> +static uint gain = SUR40_GAIN_DEF;
> +module_param(gain, uint, 0644);
> +MODULE_PARM_DESC(gain, "set initial gain");
> +
> static const struct v4l2_pix_format sur40_pix_format[] = {
> {
> .pixelformat = V4L2_TCH_FMT_TU08,
>
