From: Julian Scheel <julian@jusst.de>
To: linux-fbdev@vger.kernel.org
Subject: [PATCHv2] fbdev: ssd1307fb: Fix charge pump setting
Date: Thu, 24 Mar 2016 21:14:23 +0000 [thread overview]
Message-ID: <1458854063-9118-1-git-send-email-julian@jusst.de> (raw)
Make sure bit 4 is set for the charge pump setting. It is required according
to SSD1306 App Note.
Signed-off-by: Julian Scheel <julian@jusst.de>
---
Changes in v2:
- Simplify commit message
- Use BIT macros to increase readability
---
drivers/video/fbdev/ssd1307fb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 1611215..3b9ee0c 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -389,7 +389,7 @@ static int ssd1307fb_init(struct ssd1307fb_par *par)
return ret;
ret = ssd1307fb_write_cmd(par->client,
- (par->device_info->need_chargepump & 0x1 << 2) & 0x14);
+ BIT(4) | (par->device_info->need_chargepump ? BIT(2) : 0));
if (ret < 0)
return ret;
--
2.7.0
next reply other threads:[~2016-03-24 21:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-24 21:14 Julian Scheel [this message]
-- strict thread matches above, loose matches on Subject: below --
2016-05-10 10:30 [PATCHv2] fbdev: ssd1307fb: Fix charge pump setting Tomi Valkeinen
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