Change in coreboot[master]: mb/prodrive/hermes: Implement option API

[Angel Pons (Code Review)]

Attention is currently required from: Patrick Rudolph, Christian Walter.
Angel Pons has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/54731 )

Change subject: mb/prodrive/hermes: Implement option API
......................................................................

mb/prodrive/hermes: Implement option API

The `power_state_after_g3` board setting in the EEPROM can be updated by
the BMC. Implement the option API for `power_on_after_fail` using the
EEPROM value. For simplicity, only implement reading values for now.

Change-Id: I6473a0a80346f7b7d69653e1cac19cd428a59ba0
Signed-off-by: Angel Pons 
---
M src/mainboard/prodrive/hermes/Kconfig
M src/mainboard/prodrive/hermes/Makefile.inc
A src/mainboard/prodrive/hermes/option.c
3 files changed, 47 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/31/54731/1

diff --git a/src/mainboard/prodrive/hermes/Kconfig b/src/mainboard/prodrive/hermes/Kconfig
index ac497e6..ec29805 100644
--- a/src/mainboard/prodrive/hermes/Kconfig
+++ b/src/mainboard/prodrive/hermes/Kconfig
@@ -8,6 +8,7 @@
    select SUPERIO_ASPEED_AST2400
    select DRIVERS_ASPEED_AST_COMMON
    select DRIVERS_ASPEED_AST2050
+	select HAVE_MAINBOARD_SPECIFIC_OPTION_BACKEND
    select INTEL_LPSS_UART_FOR_CONSOLE
    select MAINBOARD_HAS_TPM2
    select MAINBOARD_HAS_LPC_TPM
diff --git a/src/mainboard/prodrive/hermes/Makefile.inc b/src/mainboard/prodrive/hermes/Makefile.inc
index 6f6a638..c72190b 100644
--- a/src/mainboard/prodrive/hermes/Makefile.inc
+++ b/src/mainboard/prodrive/hermes/Makefile.inc
@@ -5,11 +5,15 @@

bootblock-y += bootblock.c
 romstage-y += memory.c
-romstage-y += eeprom.c

ramstage-y += ramstage.c
 ramstage-y += mainboard.c
-ramstage-y += eeprom.c
+
+all-y += eeprom.c
+smm-y += eeprom.c
+
+all-$(CONFIG_USE_MAINBOARD_SPECIFIC_OPTION_BACKEND) += option.c
+smm-$(CONFIG_USE_MAINBOARD_SPECIFIC_OPTION_BACKEND) += option.c

ramstage-$(CONFIG_AZALIA_PLUGIN_SUPPORT) += variants/baseboard/hda_verb.c
 ramstage-$(CONFIG_AZALIA_PLUGIN_SUPPORT) += variants/r04/hda_verb.c
diff --git a/src/mainboard/prodrive/hermes/option.c b/src/mainboard/prodrive/hermes/option.c
new file mode 100644
index 0000000..3c924c3
--- /dev/null
+++ b/src/mainboard/prodrive/hermes/option.c
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <intelblocks/pmclib.h>
+#include <option.h>
+#include <string.h>
+#include <types.h>
+
+#include "variants/baseboard/include/eeprom.h"
+
+unsigned int get_uint_option(const char *name, const unsigned int fallback)
+{
+	if (!name)
+		return fallback;
+
+	struct eeprom_board_settings *bs = get_board_settings();
+	if (!bs)
+		return fallback;
+
+	if (strcmp(name, "power_on_after_fail") == 0) {
+		/* Encoding: 0 -> S0, 1 -> S5 */
+		switch (bs->power_state_after_g3) {
+		case 0:
+			return MAINBOARD_POWER_STATE_ON;
+		case 1:
+			return MAINBOARD_POWER_STATE_OFF;
+		default:
+			printk(BIOS_ERR, "Hermes: unhandled power_state_after_g3 value %u\n",
+			       bs->power_state_after_g3);
+			return fallback;
+		}
+	}
+	return fallback;
+}
+
+enum cb_err set_uint_option(const char *name, unsigned int value)
+{
+	/* Not implemented yet */
+	return CB_CMOS_OTABLE_DISABLED;
+}