linux-kernel - [PATCHv5 11/11] fbdev: ssd1307fb: Add blank mode

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Date:	Tue, 24 Mar 2015 22:23:58 +0100
From:	Thomas Niederprüm <niederp@...sik.uni-kl.de>
To:	plagnioj@...osoft.com, tomi.valkeinen@...com,
	maxime.ripard@...e-electrons.com, kernel@...gutronix.de,
	shawn.guo@...aro.org, robh+dt@...nel.org
Cc:	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Thomas Niederprüm <niederp@...sik.uni-kl.de>
Subject: [PATCHv5 11/11] fbdev: ssd1307fb: Add blank mode

This patch adds ssd1307fb_blank() to make the framebuffer capable
of blanking.

Signed-off-by: Thomas Niederprüm <niederp@...sik.uni-kl.de>
---
 drivers/video/fbdev/ssd1307fb.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c
index 061cc95..9101b27 100644
--- a/drivers/video/fbdev/ssd1307fb.c
+++ b/drivers/video/fbdev/ssd1307fb.c
@@ -238,6 +238,18 @@ static ssize_t ssd1307fb_write(struct fb_info *info, const char __user *buf,
 	return count;
 }
 
+static int ssd1307fb_blank(int blank_mode, struct fb_info *info)
+{
+	struct ssd1307fb_par *par = info->par;
+	int ret;
+
+	if (blank_mode != FB_BLANK_UNBLANK)
+		ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_OFF);
+	else
+		ret = ssd1307fb_write_cmd(par->client, SSD1307FB_DISPLAY_ON);
+	return ret;
+}
+
 static void ssd1307fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
 {
 	struct ssd1307fb_par *par = info->par;
@@ -263,6 +275,7 @@ static struct fb_ops ssd1307fb_ops = {
 	.owner		= THIS_MODULE,
 	.fb_read	= fb_sys_read,
 	.fb_write	= ssd1307fb_write,
+	.fb_blank	= ssd1307fb_blank,
 	.fb_fillrect	= ssd1307fb_fillrect,
 	.fb_copyarea	= ssd1307fb_copyarea,
 	.fb_imageblit	= ssd1307fb_imageblit,
-- 
2.3.0

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