[PATCH] fbdev: ssd1307fb: Fix activating the charge pump on ssd1306
From: Kai Ruhnau <hidden>
Date: 2016-02-01 15:03:59
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
The charge pump is activated by sending 0x14 where the higher bit is always 1 and the lower bit actually toggles it. Signed-off-by: Kai Ruhnau <redacted> --- drivers/video/fbdev/ssd1307fb.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index fa34808..20d249f 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c@@ -285,7 +285,7 @@ static void ssd1307fb_deferred_io(struct fb_info *info, static int ssd1307fb_init(struct ssd1307fb_par *par) { int ret; - u32 precharge, dclk, com_invdir, compins; + u32 precharge, dclk, com_invdir, compins, chargepump; if (par->device_info->need_pwm) { par->pwm = pwm_get(&par->client->dev, NULL);
@@ -388,8 +388,8 @@ static int ssd1307fb_init(struct ssd1307fb_par *par) if (ret < 0) return ret; - ret = ssd1307fb_write_cmd(par->client, - (par->device_info->need_chargepump & 0x1 << 2) & 0x14); + chargepump = 0x10 | (par->device_info->need_chargepump & 0x1) << 2; + ret = ssd1307fb_write_cmd(par->client, chargepump); if (ret < 0) return ret; --
2.4.3 -- Kai Ruhnau Software Manager T:+49 202 769302 19 Target Systemelektronik GmbH & Co. KG Heinz-Fangman-Straße 4 42287 Wuppertal Amtsgericht Wuppertal HRA 23898 Persönlich haftende Gesellschafterin Target Systemelektronik Beteiligungs GmbH Heinz-Fangman-Straße 4, 42287 Wuppertal Amtsgericht Wuppertal HRB 25346 Geschäftsführer: Jürgen Stein --