From 9ec2832e9cdd7b3ad58e39217775e5b10290e62f Mon Sep 17 00:00:00 2001 From: Rodrigo Alencar <455.rodrigo.alencar@gmail.com> Date: Fri, 24 Jul 2020 17:22:18 -0300 Subject: video: fbdev: ssd1307fb: Added support to Column offset This patch provides support for displays like VGM128064B0W10, which requires a column offset of 2, i.e., its segments starts in SEG2 and ends in SEG129. Signed-off-by: Rodrigo Alencar <455.rodrigo.alencar@gmail.com> Acked-by: Rob Herring Signed-off-by: Bartlomiej Zolnierkiewicz Link: https://patchwork.freedesktop.org/patch/msgid/1595622138-3965-1-git-send-email-455.rodrigo.alencar@gmail.com --- drivers/video/fbdev/ssd1307fb.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/video/fbdev') diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c index 09425ec317ba..eda448b7a0c9 100644 --- a/drivers/video/fbdev/ssd1307fb.c +++ b/drivers/video/fbdev/ssd1307fb.c @@ -74,6 +74,7 @@ struct ssd1307fb_par { struct fb_info *info; u8 lookup_table[4]; u32 page_offset; + u32 col_offset; u32 prechargep1; u32 prechargep2; struct pwm_device *pwm; @@ -458,11 +459,11 @@ static int ssd1307fb_init(struct ssd1307fb_par *par) if (ret < 0) return ret; - ret = ssd1307fb_write_cmd(par->client, 0x0); + ret = ssd1307fb_write_cmd(par->client, par->col_offset); if (ret < 0) return ret; - ret = ssd1307fb_write_cmd(par->client, par->width - 1); + ret = ssd1307fb_write_cmd(par->client, par->col_offset + par->width - 1); if (ret < 0) return ret; @@ -626,6 +627,9 @@ static int ssd1307fb_probe(struct i2c_client *client) if (device_property_read_u32(dev, "solomon,page-offset", &par->page_offset)) par->page_offset = 1; + if (device_property_read_u32(dev, "solomon,col-offset", &par->col_offset)) + par->col_offset = 0; + if (device_property_read_u32(dev, "solomon,com-offset", &par->com_offset)) par->com_offset = 0; -- cgit v1.2.3