whiskers: Enable LM3630A LED driver

Used to control keyboard backlight.

BRANCH=none
BUG=b:68934906
TEST=make BOARD=whiskers -j

Change-Id: Ie793ebe91670965a434896530084561a7f1c57d4
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/892842
Reviewed-by: Benjamin Gordon <bmgordon@chromium.org>
Reviewed-by: Wei-Han Chen <stimim@chromium.org>

board/hammer/board.c

@@ -5,6 +5,7 @@
 /* Hammer board configuration */
 
 #include "common.h"
+#include "driver/led/lm3630a.h"
 #include "ec_version.h"
 #include "ec_ec_comm_slave.h"
 #include "gpio.h"
@@ -162,14 +163,20 @@ static void board_init(void)
 	}
 #endif /* BOARD_STAFF */
 
-#if defined(BOARD_WAND) && defined(SECTION_IS_RW)
+#ifdef SECTION_IS_RW
+#ifdef BOARD_WAND
 	/* USB to serial queues */
 	queue_init(&ec_ec_comm_slave_input);
 	queue_init(&ec_ec_comm_slave_output);
 
 	/* UART init */
 	usart_init(&ec_ec_usart);
-#endif
+#endif /* BOARD_WAND */
+
+#ifdef BOARD_WHISKERS
+	lm3630a_poweron();
+#endif /* BOARD_WHISKERS */
+#endif /* SECTION_IS_RW */
 }
 /* This needs to happen before PWM is initialized. */
 DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_INIT_PWM - 1);

board/hammer/board.h

@@ -205,11 +205,16 @@
 #define CONFIG_I2C
 #define CONFIG_I2C_MASTER
 #define I2C_PORT_MASTER 0
+#define I2C_PORT_KBLIGHT 0
 #define I2C_PORT_CHARGER 1
 
 /* Enable PWM */
 #define CONFIG_PWM
 
+#ifdef BOARD_WHISKERS
+#define CONFIG_LED_DRIVER_LM3630A
+#endif
+
 /* Enable Elan touchpad driver */
 #define CONFIG_TOUCHPAD
 #define CONFIG_TOUCHPAD_ELAN