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
+
+#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");
+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,
--
2.7.4
