lpc: remove lpc_host_reset

No one is using this method and it implies that all chipset should
support the RCIN# Virtual Wire if using eSPI. Only large core chips
use RCIN#; small core chips don't.

This method was introduced for skylake and has since been replaced
since CL:575947 was merged.

BRANCH=none
BUG=none
TEST=build all

Change-Id: Ic541e3d61d1e0ecc64a0bb12385bdada40f0acf2
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/975904
Reviewed-on: https://chromium-review.googlesource.com/982347
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Tested-by: Furquan Shaikh <furquan@chromium.org>
Trybot-Ready: Furquan Shaikh <furquan@chromium.org>

4 files changed, 0 insertions, 64 deletions

diff --git a/chip/it83xx/lpc.c b/chip/it83xx/lpc.c
index 231dd25ece..bde0ebf0c1 100644
--- a/chip/it83xx/lpc.c
+++ b/chip/it83xx/lpc.c
@@ -703,20 +703,6 @@ static void lpc_init(void)
  */
 DECLARE_HOOK(HOOK_INIT, lpc_init, HOOK_PRIO_INIT_LPC);
 
-void lpc_host_reset(void)
-{
-	/* Host Reset Control will assert RCIN# */
-#ifdef CONFIG_ESPI_VW_SIGNALS
-	espi_vw_set_wire(VW_RCIN_L, 0);
-	udelay(10);
-	espi_vw_set_wire(VW_RCIN_L, 1);
-#else
-	gpio_set_level(GPIO_SYS_RESET_L, 0);
-	udelay(10);
-	gpio_set_level(GPIO_SYS_RESET_L, 1);
-#endif
-}
-
 #ifndef CONFIG_ESPI_VW_SIGNALS
 void lpcrst_interrupt(enum gpio_signal signal)
 {
diff --git a/chip/mchp/lpc.c b/chip/mchp/lpc.c
index 37c2adc6ac..ac47b042f6 100644
--- a/chip/mchp/lpc.c
+++ b/chip/mchp/lpc.c
@@ -466,24 +466,6 @@ DECLARE_DEFERRED(lpc_chipset_reset);
 #endif
 
 
-#ifdef CONFIG_ESPI
-/*
- * Called from power/skylake.c chipset_reset()
- * For LPC it doesn't call here, instead it pulses RCIN# low for 10 us
- */
-void lpc_host_reset(void)
-{
-	/* Host Reset Control will assert KBRST# (LPC) or RCIN# VW (eSPI) */
-#ifdef CONFIG_ESPI_VW_SIGNALS
-	espi_vw_pulse_wire(VW_RCIN_L, 0);
-#else
-	gpio_set_level(GPIO_PCH_RCIN_L, 0);
-	udelay(10);
-	gpio_set_level(GPIO_PCH_RCIN_L, 1);
-#endif
-}
-#endif /* #ifdef CONFIG_ESPI */
-
 void lpc_set_init_done(int val)
 {
 	init_done = val;
diff --git a/chip/npcx/lpc.c b/chip/npcx/lpc.c
index 078474b2e5..518e15f957 100644
--- a/chip/npcx/lpc.c
+++ b/chip/npcx/lpc.c
@@ -792,33 +792,6 @@ int lpc_get_pltrst_asserted(void)
 	return IS_BIT_SET(NPCX_MSWCTL1, NPCX_MSWCTL1_PLTRST_ACT);
 }
 
-void lpc_host_reset(void)
-{
-	/* Host Reset Control will assert KBRST# (LPC) or RCIN# VW (eSPI) */
-#ifdef CONFIG_ESPI_VW_SIGNALS
-	int timeout = 100; /* 100 * 10us = 1ms */
-
-	/* Assert RCIN# VW to host */
-	SET_BIT(NPCX_MSWCTL1, NPCX_MSWCTL1_HRSTOB);
-
-	/* Poll for dirty bit to clear to indicate VW read by host */
-	while ((NPCX_VWEVSM(2) & VWEVSM_DIRTY(1))) {
-		if (!timeout--) {
-			CPRINTS("RCIN# VW Timeout");
-			break;
-		}
-		udelay(10);
-	}
-
-	/* Deassert RCIN# VW to host */
-	CLEAR_BIT(NPCX_MSWCTL1, NPCX_MSWCTL1_HRSTOB);
-#else
-	SET_BIT(NPCX_MSWCTL1, NPCX_MSWCTL1_HRSTOB);
-	udelay(10);
-	CLEAR_BIT(NPCX_MSWCTL1, NPCX_MSWCTL1_HRSTOB);
-#endif
-}
-
 #ifndef CONFIG_ESPI
 /* Initialize host settings by interrupt */
 void lpc_lreset_pltrst_handler(void)
diff --git a/include/lpc.h b/include/lpc.h
index c95999a98e..4f00d2cc3a 100644
--- a/include/lpc.h
+++ b/include/lpc.h
@@ -125,11 +125,6 @@ void lpc_clear_acpi_status_mask(uint8_t mask);
  */
 int lpc_get_pltrst_asserted(void);
 
-/**
- * Reset the host with KBRST# or RCIN#
- */
-void lpc_host_reset(void);
-
 /* Disable LPC ACPI interrupts */
 void lpc_disable_acpi_interrupts(void);