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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>
This commit is contained in:
Geert Uytterhoeven 2021-10-19 16:45:15 +02:00 committed by Miguel Ojeda
parent 85d93b165f
commit b37cc22027
1 changed files with 19 additions and 6 deletions
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25
drivers/auxdisplay/ht16k33.c
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@ -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)