Change in coreboot[master]: soc/amd/sabrina: Add espi_switch_to_spi2_pads

[Raul Rangel (Code Review)]

Attention is currently required from: Jason Glenesk, Marshall Dawson, Fred Reitberger, Felix Held.
Raul Rangel has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/63095 )

Change subject: soc/amd/sabrina: Add espi_switch_to_spi2_pads
......................................................................

soc/amd/sabrina: Add espi_switch_to_spi2_pads

The way to select the pads has changed from Cezanne. We don't have a
public PPR for these definitions yet, so I hard coded the values.

BUG=b:226635441
TEST=Build skyrim

Signed-off-by: Raul E Rangel 
Change-Id: I96baf6b9c169ed61d221352b29ac676bca40da21
---
M src/soc/amd/sabrina/Makefile.inc
A src/soc/amd/sabrina/espi_util.c
A src/soc/amd/sabrina/include/soc/espi.h
3 files changed, 23 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/95/63095/1

diff --git a/src/soc/amd/sabrina/Makefile.inc b/src/soc/amd/sabrina/Makefile.inc
index 74124d2..99abda8 100644
--- a/src/soc/amd/sabrina/Makefile.inc
+++ b/src/soc/amd/sabrina/Makefile.inc
@@ -12,6 +12,7 @@

bootblock-y	+= bootblock.c
 bootblock-y	+= early_fch.c
+bootblock-y	+= espi_util.c
 bootblock-y	+= gpio.c
 bootblock-y	+= i2c.c
 bootblock-y	+= reset.c
diff --git a/src/soc/amd/sabrina/espi_util.c b/src/soc/amd/sabrina/espi_util.c
new file mode 100644
index 0000000..993fc10
--- /dev/null
+++ b/src/soc/amd/sabrina/espi_util.c
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/spi.h>
+#include <soc/espi.h>
+#include <types.h>
+
+void espi_switch_to_spi2_pads(void)
+{
+	uint8_t reg = spi_read8(0x10);
+
+	reg |= BIT(2);
+
+	spi_write8(0x10, reg);
+}
diff --git a/src/soc/amd/sabrina/include/soc/espi.h b/src/soc/amd/sabrina/include/soc/espi.h
new file mode 100644
index 0000000..d7de153
--- /dev/null
+++ b/src/soc/amd/sabrina/include/soc/espi.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef AMD_SABRINA_ESPI_H
+#define AMD_SABRINA_ESPI_H
+
+void espi_switch_to_spi2_pads(void);
+
+#endif /* AMD_SABRINA_ESPI_H */