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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Robin van der Gracht <robin@protonic.nl>,
	Rob Herring <robh+dt@kernel.org>, Miguel Ojeda <ojeda@kernel.org>,
	Paul Burton <paulburton@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Pavel Machek <pavel@ucw.cz>, Marek Behun <marek.behun@nic.cz>
Cc: devicetree@vger.kernel.org, linux-leds@vger.kernel.org,
	linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
	Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH v4 15/19] auxdisplay: ht16k33: Extract ht16k33_brightness_set()
Date: Tue, 27 Jul 2021 16:04:55 +0200	[thread overview]
Message-ID: <20210727140459.3767788-16-geert@linux-m68k.org> (raw)
In-Reply-To: <20210727140459.3767788-1-geert@linux-m68k.org>

Extract brightness handling into a helper function, so it can be called
from multiple places.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
v4:
  - No changes,

v3:
  - Use "err" instead of "error" to be consistent with existing driver
    naming style,

v2:
  - No changes.
---
 drivers/auxdisplay/ht16k33.c | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/drivers/auxdisplay/ht16k33.c b/drivers/auxdisplay/ht16k33.c
index c7a3a0e1fbb5d03e..928ac9722c142855 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)
-- 
2.25.1


  parent reply	other threads:[~2021-07-27 14:05 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-27 14:04 [PATCH v4 00/19] auxdisplay: ht16k33: Add character display support Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 01/19] uapi: Add <linux/map_to_14segment.h> Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 02/19] dt-bindings: auxdisplay: ht16k33: Document Adafruit segment displays Geert Uytterhoeven
2021-08-02 20:40   ` Rob Herring
2021-07-27 14:04 ` [PATCH v4 03/19] auxdisplay: img-ascii-lcd: Fix lock-up when displaying empty string Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 04/19] auxdisplay: img-ascii-lcd: Add helper variable dev Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 05/19] auxdisplay: img-ascii-lcd: Convert device attribute to sysfs_emit() Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 06/19] auxdisplay: Extract character line display core support Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 07/19] auxdisplay: linedisp: Use kmemdup_nul() helper Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 08/19] auxdisplay: linedisp: Add support for changing scroll rate Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 09/19] auxdisplay: ht16k33: Connect backlight to fbdev Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 10/19] auxdisplay: ht16k33: Use HT16K33_FB_SIZE in ht16k33_initialize() Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 11/19] auxdisplay: ht16k33: Remove unneeded error check in keypad probe() Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 12/19] auxdisplay: ht16k33: Convert to simple i2c probe function Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 13/19] auxdisplay: ht16k33: Add helper variable dev Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 14/19] auxdisplay: ht16k33: Move delayed work Geert Uytterhoeven
2021-07-27 14:04 ` Geert Uytterhoeven [this message]
2021-07-27 14:04 ` [PATCH v4 16/19] auxdisplay: ht16k33: Extract frame buffer probing Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 17/19] auxdisplay: ht16k33: Add support for segment displays Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 18/19] dt-bindings: auxdisplay: ht16k33: Document LED subnode Geert Uytterhoeven
2021-07-27 14:04 ` [PATCH v4 19/19] auxdisplay: ht16k33: Add LED support Geert Uytterhoeven
2021-07-27 21:05   ` Randy Dunlap
2021-07-28  7:39     ` Geert Uytterhoeven

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