[PATCHv5 09/11] fbdev: ssd1307fb: Add module parameter to set the initial contrast

[Thomas NiederprÃm]

This patch adds the module parameter "contrast" to determine the
contrast value that is used to initialize the display. This
setting applies to all instances of the driver.

Signed-off-by: Thomas NiederprÃm <niederp@xxxxxxxxxxxxxxxx>
---
 drivers/video/fbdev/ssd1307fb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 6149827..d5aec5c 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -43,6 +43,9 @@
 static u_int refreshrate = REFRESHRATE;
 module_param(refreshrate, uint, 0);
 
+static u_int contrast = 127;
+module_param(contrast, uint, S_IRUGO);
+
 struct ssd1307fb_par;
 
 struct ssd1307fb_deviceinfo {
@@ -525,7 +528,7 @@ static int ssd1307fb_probe(struct i2c_client *client,
 	par->com_lrremap = of_property_read_bool(node, "solomon,com-lrremap");
 	par->com_invdir = of_property_read_bool(node, "solomon,com-invdir");
 
-	par->contrast = 127;
+	par->contrast = contrast;
 	par->vcomh = par->device_info->default_vcomh;
 
 	/* Setup display timing */
-- 
2.3.0

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