From 0558a242bbfbf4a2a1fec3c85c01767e30dee8f5 Mon Sep 17 00:00:00 2001
From: Mulin Chao <mlchao@nuvoton.com>
Date: Thu, 4 Aug 2016 14:20:36 +0800
Subject: [PATCH] wheatley: Modified board level drivers for eSPI POC on
 wheatley.

Modified board level drivers for eSPI POC on wheatley. By adding CONFIG_ESPI
definition, ec can support espi protocols for host interface on x86 based
platform such as skylake and so on. CONFIG_VW_SIGNALS will be used in the
future for saving GPIOs during power sequence.

Modified sources:
1. wheatley/board.h: Enable/disable espi driver.
2, wheatley/board.c: Add VW signals in power signal list.
3. wheatley/gpio.inc: Save GPIOs if CONFIG_VW_SIGNALS is defined.

BRANCH=none
BUG=chrome-os-partner:34346
TEST=make BOARD=wheatley; test nuvoton IC specific drivers

Change-Id: I0e8a951de6eacd4f8be65ffaac242f38079375d5
Signed-off-by: Mulin Chao <mlchao@nuvoton.com>
Reviewed-on: https://chromium-review.googlesource.com/366520
Reviewed-by: Randall Spangler <rspangler@chromium.org>
---
 board/wheatley/board.c  | 6 ++++++
 board/wheatley/board.h  | 4 ++++
 board/wheatley/gpio.inc | 3 +++
 3 files changed, 13 insertions(+)

diff --git a/board/wheatley/board.c b/board/wheatley/board.c
index 557aca2bb2..5ae6caf1a2 100644
--- a/board/wheatley/board.c
+++ b/board/wheatley/board.c
@@ -44,6 +44,7 @@
 #include "usb_pd.h"
 #include "usb_pd_tcpm.h"
 #include "util.h"
+#include "espi.h"
 
 #define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
 #define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
@@ -101,8 +102,13 @@ void tablet_mode_interrupt(enum gpio_signal signal)
 const struct power_signal_info power_signal_list[] = {
 	{GPIO_RSMRST_L_PGOOD,    1, "RSMRST_N_PWRGD"},
 	{GPIO_PCH_SLP_S0_L,      1, "SLP_S0_DEASSERTED"},
+#ifdef CONFIG_VW_SIGNALS
+	{VW_SLP_S3_L,            1, "SLP_S3_DEASSERTED"},
+	{VW_SLP_S4_L,            1, "SLP_S4_DEASSERTED"},
+#else
 	{GPIO_PCH_SLP_S3_L,      1, "SLP_S3_DEASSERTED"},
 	{GPIO_PCH_SLP_S4_L,      1, "SLP_S4_DEASSERTED"},
+#endif
 	{GPIO_PCH_SLP_SUS_L,     1, "SLP_SUS_DEASSERTED"},
 	{GPIO_PMIC_DPWROK,       1, "PMIC_DPWROK"},
 };
diff --git a/board/wheatley/board.h b/board/wheatley/board.h
index bfad967c78..b9f62d73d9 100644
--- a/board/wheatley/board.h
+++ b/board/wheatley/board.h
@@ -148,6 +148,10 @@
 #undef CONFIG_CMD_TIMERINFO
 #undef CONFIG_CONSOLE_CMDHELP
 
+/* Features of eSPI */
+#undef CONFIG_ESPI       /* Use eSPI protocol for host interface of x86 CPU */
+#undef CONFIG_VW_SIGNALS /* Use VW signals instead of GPIOs */
+
 #ifndef __ASSEMBLER__
 
 #include "gpio_signal.h"
diff --git a/board/wheatley/gpio.inc b/board/wheatley/gpio.inc
index 8d16b9d817..c50b184482 100644
--- a/board/wheatley/gpio.inc
+++ b/board/wheatley/gpio.inc
@@ -15,8 +15,11 @@ GPIO_INT(WP_L,               PIN(7,  1), GPIO_INT_BOTH,                   switch
 GPIO_INT(POWER_BUTTON_L,     PIN(9,  7), GPIO_INT_BOTH,                   power_button_interrupt)  /* A48 - GPIO97 for ROP_EC_PWR_BTN_L_R */
 /* RSMRST from PMIC */
 GPIO_INT(RSMRST_L_PGOOD,     PIN(7,  2), GPIO_INT_BOTH,                   power_signal_interrupt)  /* A36 - PWRGD for ROP_EC_RSMRST_L */
+/* Use VW signals instead of GPIOs */
+#ifndef CONFIG_VW_SIGNALS
 GPIO_INT(PCH_SLP_S4_L,       PIN(5,  0), GPIO_INT_BOTH,                   power_signal_interrupt)  /* A25 - GPIO50 for SLP_S4_L */
 GPIO_INT(PCH_SLP_S3_L,       PIN(4,  0), GPIO_INT_BOTH,                   power_signal_interrupt)  /* B21 - TA1 for SLP_S3_L */
+#endif
 /*
  * This pulldown should be removed in future hardware followers. The signal
  * is pulled up in the SoC when the primary rails are on and/or ramping.