npcx: Add espi driver of npcx5mng for x86-based platform.

Add espi driver for x86-based platform which support espi interface such
as skylake and so on.

Added source:
1. espi.c: Add drivers which supports the utilities of peripheral and
           virtual-wire channels so far.
2. espi.h: Add espi virtual-wire declaration for power sequence FW.

Modified sources:
1. lpc.c: Add interrupts and initialization steps for espi.
2. gpio.c: Add interrupt handler of espi reset.

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

Change-Id: Ie80afe79d85aba47fc0b72898a8374c2898ec114
Signed-off-by: Mulin Chao <mlchao@nuvoton.com>
Reviewed-on: https://chromium-review.googlesource.com/366181
Reviewed-by: Randall Spangler <rspangler@chromium.org>

1 files changed, 11 insertions, 2 deletions

diff --git a/chip/npcx/lpc_chip.h b/chip/npcx/lpc_chip.h
index b87c2779fa..5a7cf2e6fb 100644
--- a/chip/npcx/lpc_chip.h
+++ b/chip/npcx/lpc_chip.h
@@ -8,7 +8,16 @@
 #ifndef __CROS_EC_LPC_CHIP_H
 #define __CROS_EC_LPC_CHIP_H
 
-/* Initialize host settings by interrupt */
-void lpc_lreset_pltrst_handler(void);
+/* For host registers initialization via SIB module */
+void host_register_init(void);
 
+#ifdef CONFIG_ESPI
+/* eSPI Initialization functions */
+void espi_init(void);
+/* eSPI reset assert/de-assert interrupt */
+void espi_espirst_handler(void);
+#else
+/* LPC PLTRST assert/de-assert interrupt */
+void lpc_lreset_pltrst_handler(void);
+#endif
 #endif /* __CROS_EC_LPC_CHIP_H */