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authorGeert Uytterhoeven <geert@linux-m68k.org>2021-10-19 17:45:15 +0300
committerMiguel Ojeda <ojeda@kernel.org>2021-10-22 00:36:29 +0300
commitb37cc2202705a791ab0e3d1ce72789ae97566484 (patch)
tree4fa90329d5ef771cf05dfe3bde9c96814f925fe0 /drivers/auxdisplay/ht16k33.c
parent85d93b165f81ffb93745325efdf3df2b2df1a0e6 (diff)
downloadlinux-b37cc2202705a791ab0e3d1ce72789ae97566484.tar.xz
auxdisplay: ht16k33: Extract ht16k33_brightness_set()
Extract brightness handling into a helper function, so it can be called from multiple places. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Robin van der Gracht <robin@protonic.nl> Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'drivers/auxdisplay/ht16k33.c')
-rw-r--r--drivers/auxdisplay/ht16k33.c25
1 files changed, 19 insertions, 6 deletions
diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index b50cbf7e57ba..60e616c0e932 100644
--- a/drivers/auxdisplay/ht16k33.c
+++ b/drivers/auxdisplay/ht16k33.c
@@ -113,6 +113,22 @@ static int ht16k33_display_off(struct ht16k33_priv *priv)
return i2c_smbus_write_byte(priv->client, REG_DISPLAY_SETUP);
}
+static int ht16k33_brightness_set(struct ht16k33_priv *priv,
+ unsigned int brightness)
+{
+ int err;
+
+ if (brightness == 0)
+ return ht16k33_display_off(priv);
+
+ err = ht16k33_display_on(priv);
+ if (err)
+ return err;
+
+ return i2c_smbus_write_byte(priv->client,
+ REG_BRIGHTNESS | (brightness - 1));
+}
+
static void ht16k33_fb_queue(struct ht16k33_priv *priv)
{
struct ht16k33_fbdev *fbdev = &priv->fbdev;
@@ -197,13 +213,10 @@ static int ht16k33_bl_update_status(struct backlight_device *bl)
if (bl->props.power != FB_BLANK_UNBLANK ||
bl->props.fb_blank != FB_BLANK_UNBLANK ||
- bl->props.state & BL_CORE_FBBLANK || brightness == 0) {
- return ht16k33_display_off(priv);
- }
+ bl->props.state & BL_CORE_FBBLANK)
+ brightness = 0;
- ht16k33_display_on(priv);
- return i2c_smbus_write_byte(priv->client,
- REG_BRIGHTNESS | (brightness - 1));
+ return ht16k33_brightness_set(priv, brightness);
}
static int ht16k33_bl_check_fb(struct backlight_device *bl, struct fb_info *fi)