cranky: Implement LAN power control.

Based on the code cloned from rambi, and
1.Apply PM6 as LAN power control pin.
2.Enable LAN power in S0 and S3.

BUG=chrome-os-partner:30749
BRANCH=none
TEST=make -j buildall, make -j tests

Change-Id: I27031b26f595cfcb790c919aff347eb310a626d5
Signed-off-by: Grover Yen <Grover_Yen@wistron.com>
Reviewed-on: https://chromium-review.googlesource.com/212598
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Mohammed Habibulla <moch@chromium.org>

4 files changed, 18 insertions, 0 deletions

diff --git a/board/cranky/board.c b/board/cranky/board.c
index a2afa3b8e8..72ab476965 100644
--- a/board/cranky/board.c
+++ b/board/cranky/board.c
@@ -93,6 +93,7 @@ const struct gpio_info gpio_list[] = {
 	{"ENABLE_BACKLIGHT",     LM4_GPIO_M, (1<<7), GPIO_ODR_HIGH, NULL},
 	{"ENABLE_TOUCHPAD",      LM4_GPIO_N, (1<<1), GPIO_OUT_LOW, NULL},
 	{"ENTERING_RW",          LM4_GPIO_D, (1<<6), GPIO_OUT_LOW, NULL},
+	{"LAN_POWER",            LM4_GPIO_M, (1<<6), GPIO_OUT_LOW, NULL},
 	{"LPC_CLKRUN_L",         LM4_GPIO_M, (1<<2), GPIO_ODR_HIGH, NULL},
 	{"PCH_CORE_PWROK",       LM4_GPIO_F, (1<<5), GPIO_OUT_LOW, NULL},
 	{"PCH_PWRBTN_L",         LM4_GPIO_H, (1<<0), GPIO_ODR_HIGH, NULL},
diff --git a/board/cranky/board.h b/board/cranky/board.h
index b82daac1c8..967b54ec5e 100644
--- a/board/cranky/board.h
+++ b/board/cranky/board.h
@@ -29,6 +29,7 @@
 #define CONFIG_KEYBOARD_COL2_INVERTED
 #define CONFIG_KEYBOARD_IRQ_GPIO GPIO_KBD_IRQ_L
 #define CONFIG_KEYBOARD_PROTOCOL_8042
+#define CONFIG_LAN_POWER_S3 GPIO_LAN_POWER
 #define CONFIG_LED_COMMON
 #define CONFIG_LOW_POWER_IDLE
 #undef  CONFIG_PECI
@@ -109,6 +110,7 @@ enum gpio_signal {
 	GPIO_ENABLE_BACKLIGHT,     /* Enable backlight power */
 	GPIO_ENABLE_TOUCHPAD,      /* Enable touchpad power */
 	GPIO_ENTERING_RW,          /* Indicate when EC is entering RW code */
+	GPIO_LAN_POWER,            /* Enable LAN power supplies*/
 	GPIO_LPC_CLKRUN_L,         /* Request that PCH drive LPC clock */
 	GPIO_PCH_CORE_PWROK,       /* Indicate core well power is stable */
 	GPIO_PCH_PWRBTN_L,         /* Power button output to PCH */
diff --git a/include/config.h b/include/config.h
index bd6bb63c87..839bc6d9b1 100755
--- a/include/config.h
+++ b/include/config.h
@@ -888,6 +888,11 @@
 #undef CONFIG_WIRELESS_SUSPEND
 
 /*
+ * Support LAN controller be powered in suspend (S3).
+ */
+#undef CONFIG_LAN_POWER_S3
+
+/*
  * Write protect signal is active-high.  If this is defined, there must be a
  * GPIO named GPIO_WP; if not defined, there must be a GPIO names GPIO_WP_L.
  */
diff --git a/power/baytrail.c b/power/baytrail.c
index 16764dd803..f6320812bd 100755
--- a/power/baytrail.c
+++ b/power/baytrail.c
@@ -227,6 +227,11 @@ enum power_state power_handle_state(enum power_state state)
 		 */
 		gpio_set_level(GPIO_ENABLE_TOUCHPAD, 1);
 
+#ifdef CONFIG_LAN_POWER_S3
+		/* Turn on LAN controller power */
+		gpio_set_level(CONFIG_LAN_POWER_S3, 1);
+#endif
+
 		/* Call hooks now that rails are up */
 		hook_notify(HOOK_CHIPSET_STARTUP);
 		return POWER_S3;
@@ -384,6 +389,11 @@ enum power_state power_handle_state(enum power_state state)
 		gpio_set_level(GPIO_ENABLE_TOUCHPAD, 0);
 		gpio_set_level(GPIO_TOUCHSCREEN_RESET_L, 0);
 
+#ifdef CONFIG_LAN_POWER_S3
+		/* Turn off LAN controller power */
+		gpio_set_level(CONFIG_LAN_POWER_S3, 0);
+#endif
+
 		/* Turn off power to RAM */
 		gpio_set_level(GPIO_PP1350_EN, 0);