soc/amd/genoa: Add GPIO support

Change-Id: I2e827e9ffbb2ec1be0f1247b77660a9fdeb04f7b
Signed-off-by: Varshit Pandya <pandyavarshit@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78222
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/soc/amd/genoa/Kconfig

@@ -11,6 +11,7 @@ config SOC_SPECIFIC_OPTIONS
 	select SOC_AMD_COMMON
 	select SOC_AMD_COMMON_BLOCK_ACPIMMIO
 	select SOC_AMD_COMMON_BLOCK_AOAC
+	select SOC_AMD_COMMON_BLOCK_BANKED_GPIOS
 	select SOC_AMD_COMMON_BLOCK_CPUFREQ_FAM17H_19H
 	select SOC_AMD_COMMON_BLOCK_HAS_ESPI
 	select SOC_AMD_COMMON_BLOCK_LPC

src/soc/amd/genoa/Makefile.inc

@@ -4,6 +4,7 @@ ifeq ($(CONFIG_SOC_AMD_GENOA),y)
 all-y		+= mmap_boot.c
 all-y		+= reset.c
 all-y		+= config.c
+all-y		+= gpio.c
 
 bootblock-y	+= early_fch.c
 bootblock-y	+= aoac.c

src/soc/amd/genoa/gpio.c

@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <amdblocks/gpio.h>
+#include <soc/gpio.h>
+#include <types.h>
+
+/* see the IOMUX function table for the mapping from GPIO number to GEVENT number */
+static const struct soc_amd_event gpio_event_table[] = {
+	{ GPIO_0, GEVENT_21 }, /* GPIO0 may only be used as PWR_BTN_L in ACPI */
+	{ GPIO_1, GEVENT_19 },
+	{ GPIO_2, GEVENT_8 },
+	{ GPIO_3, GEVENT_2 },
+	{ GPIO_4, GEVENT_4 },
+	{ GPIO_5, GEVENT_7 },
+	{ GPIO_6, GEVENT_10 },
+	{ GPIO_16, GEVENT_12 },
+	{ GPIO_17, GEVENT_13 },
+	{ GPIO_21, GEVENT_5 },
+	{ GPIO_22, GEVENT_3 },
+	{ GPIO_23, GEVENT_16 },
+	{ GPIO_24, GEVENT_14 },
+	{ GPIO_26, GEVENT_15 },
+	{ GPIO_76, GEVENT_11 },
+	{ GPIO_86, GEVENT_9 },
+	{ GPIO_89, GEVENT_0 },
+	{ GPIO_104, GEVENT_20 },
+	{ GPIO_105, GEVENT_22 },
+	{ GPIO_106, GEVENT_23 },
+	{ GPIO_115, GEVENT_1 },
+	{ GPIO_116, GEVENT_6 },
+	{ GPIO_129, GEVENT_17 },
+};
+
+void soc_get_gpio_event_table(const struct soc_amd_event **table, size_t *items)
+{
+	*table = gpio_event_table;
+	*items = ARRAY_SIZE(gpio_event_table);
+}