[source] ar71xx: fix LED config for DIR-869 A1

[LEDE Commits]

mkresin pushed a commit to source.git, branch lede-17.01:
https://git.lede-project.org/97405237638f02e6974e30959787d3d23dead5b0

commit 97405237638f02e6974e30959787d3d23dead5b0
Author: Florian Beier <beier.florian at gmail.com>
AuthorDate: Wed Oct 25 20:12:24 2017 +0200

    ar71xx: fix LED config for DIR-869 A1
    
    This fixes the LED configuration for the D-Link DIR-869 A1. In order to
    support the device I probed around using an initramfs image for the
    UniFi AC. Pulling GPIO 15 to low enabled the LEDs while high disabled them.
    GPIO 16 set to low meant that the color was white while pulling it to high
    made the color change to orange. The past code was written based upon these
    findings.
    However, running a flashed image I now discovered that GPIO 15 controls the
    orange LEDs while GPIO 16 controls the white ones and that both are active
    when low. This means that the GPIOs were inverted and one active_low was set
    wrong which this patch fixes.
    
    Behavior of the LED front after this patch is applied:
    
    cat /sys/devices/platform/leds-gpio/leds/d-link:white:status/brightness
    0   -> white LEDs are OFF
    255 -> white LEDs are ON
    
    cat /sys/devices/platform/leds-gpio/leds/d-link:orange:status/brightness
    0   -> orange LEDs are OFF
    255 -> orange LEDs are ON
    
    If the brightness of both is set to 255 the LED front will be white.
    If the brightness of both is set to 0 the LED front will be off.
    
    Signed-off-by: Florian Beier <beier.florian at gmail.com>
---
 target/linux/ar71xx/files/arch/mips/ath79/mach-dir-869-a1.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-dir-869-a1.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-dir-869-a1.c
index 5847423..b0894e3 100644
--- a/target/linux/ar71xx/files/arch/mips/ath79/mach-dir-869-a1.c
+++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-dir-869-a1.c
@@ -42,8 +42,8 @@
 
 #define DIR869A1_GPIO_ENABLE_SWITCH	11
 
-#define DIR869A1_GPIO_LED_POWER		15
-#define DIR869A1_GPIO_LED_ORANGE	16
+#define DIR869A1_GPIO_LED_ORANGE	15
+#define DIR869A1_GPIO_LED_WHITE		16
 
 #define DIR869A1_KEYS_POLL_INTERVAL	20 /* msecs */
 #define DIR869A1_KEYS_DEBOUNCE_INTERVAL	(3 * DIR869A1_KEYS_POLL_INTERVAL)
@@ -59,17 +59,14 @@
 
 static struct gpio_led dir869a1_leds_gpio[] __initdata = {
 	{
-		/* Actually, this GPIO controls the LED power,
-		 * while d-link:orange:status switches it between
-		 * orange and white */
 		.name		= "d-link:white:status",
-		.gpio		= DIR869A1_GPIO_LED_POWER,
+		.gpio		= DIR869A1_GPIO_LED_WHITE,
 		.active_low	= 1,
 	},
 	{
 		.name		= "d-link:orange:status",
 		.gpio		= DIR869A1_GPIO_LED_ORANGE,
-		.active_low	= 0,
+		.active_low	= 1,
 	},
 };