From ee03dc2644ffd284847384080616a6a319e31a56 Mon Sep 17 00:00:00 2001
From: Marc Jones <marcj303@gmail.com>
Date: Sat, 14 Jul 2018 17:32:04 -0600
Subject: mainboard/google/kahlee: Enable backlight in SMI APMC

Enable the backlight in the OS callback to SMI for APMC. This keeps
the backlight off until the OS is ready to display something.

BUG=b:72694972
TEST=Backlight turns on at ChromeOS splash screen

Change-Id: Idf32b1a3d45971883571a829a5c0c1f8563bb1f7
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/27487
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
---
 src/mainboard/google/kahlee/smihandler.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'src/mainboard/google/kahlee')

diff --git a/src/mainboard/google/kahlee/smihandler.c b/src/mainboard/google/kahlee/smihandler.c
index 62ba2b076d..83757a850d 100644
--- a/src/mainboard/google/kahlee/smihandler.c
+++ b/src/mainboard/google/kahlee/smihandler.c
@@ -17,8 +17,10 @@
 #include <arch/acpi.h>
 #include <cpu/x86/smm.h>
 #include <ec/google/chromeec/smm.h>
+#include <gpio.h>
 #include <soc/smi.h>
 #include <variant/ec.h>
+#include <variant/gpio.h>
 
 void mainboard_smi_gpi(u32 gpi_sts)
 {
@@ -39,5 +41,9 @@ int mainboard_smi_apmc(u8 apmc)
 	if (IS_ENABLED(CONFIG_EC_GOOGLE_CHROMEEC))
 		chromeec_smi_apmc(apmc, MAINBOARD_EC_SCI_EVENTS,
 					MAINBOARD_EC_SMI_EVENTS);
+
+	/* Enable backlight - GPIO active low */
+	gpio_set(GPIO_133, 0);
+
 	return 0;
 }
-- 
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