linux-kernel - [PATCH 6/7] platform/x86: fujitsu-laptop: Define constants for backlight power control

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Message-Id: <20180211210727.12130-7-kernel@kempniu.pl>
Date:   Sun, 11 Feb 2018 22:07:26 +0100
From:   Michał Kępień <kernel@...pniu.pl>
To:     Jonathan Woithe <jwoithe@...t42.net>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 6/7] platform/x86: fujitsu-laptop: Define constants for backlight power control

Use named constants instead of integers in call_fext_func() invocations
related to backlight power control in order to more clearly convey the
intent of each call.

Signed-off-by: Michał Kępień <kernel@...pniu.pl>
---
 drivers/platform/x86/fujitsu-laptop.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
index 17779b8b7f30..0ee03d1fcbc4 100644
--- a/drivers/platform/x86/fujitsu-laptop.c
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -101,6 +101,11 @@
 #define ECO_LED	0x10000
 #define ECO_LED_ON	0x80000
 
+/* FUNC interface - backlight power control */
+#define BACKLIGHT_POWER	0x4
+#define BACKLIGHT_OFF	0x3
+#define BACKLIGHT_ON	0x0
+
 /* Hotkey details */
 #define KEY1_CODE	0x410	/* codes for the keys in the GIRB register */
 #define KEY2_CODE	0x411
@@ -257,9 +262,11 @@ static int bl_update_status(struct backlight_device *b)
 
 	if (fext) {
 		if (b->props.power == FB_BLANK_POWERDOWN)
-			call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x3);
+			call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
+				       BACKLIGHT_POWER, BACKLIGHT_OFF);
 		else
-			call_fext_func(fext, FUNC_BACKLIGHT, 0x1, 0x4, 0x0);
+			call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
+				       BACKLIGHT_POWER, BACKLIGHT_ON);
 	}
 
 	return set_lcd_level(device, b->props.brightness);
@@ -818,7 +825,8 @@ static int acpi_fujitsu_laptop_add(struct acpi_device *device)
 	/* Sync backlight power status */
 	if (fujitsu_bl && fujitsu_bl->bl_device &&
 	    acpi_video_get_backlight_type() == acpi_backlight_vendor) {
-		if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2, 0x4, 0x0) == 3)
+		if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2, BACKLIGHT_POWER,
+				   0x0) == 3)
 			fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
 		else
 			fujitsu_bl->bl_device->props.power = FB_BLANK_UNBLANK;
-- 
2.16.1