mb/google/fatcat: Add minimal code support for fatcat

This patch adds initial code block required to build google/fatcat
board with Intel Meteor Lake Silicon. Later after the initial board
power-on is successful, we shall switch to Panther Lake silicon to
build the google/fatcat reference design.

BUG=b:347669091
TEST=Able to build the google/fatcat and able to hit power-on reset
using Intel Meteor Lake SoC platform.

Change-Id: Iad78aec51b2f0f240991c9c35842764a60be988e
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83197
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/src/mainboard/google/fatcat/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/fatcat/variants/baseboard/include/baseboard/variants.h
new file mode 100644
index 0000000000..8a97d00deb
--- /dev/null
+++ b/src/mainboard/google/fatcat/variants/baseboard/include/baseboard/variants.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __BASEBOARD_VARIANTS_H__
+#define __BASEBOARD_VARIANTS_H__
+
+#include <chip.h>
+#include <soc/gpio.h>
+#include <soc/meminit.h>
+#include <stdint.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+
+/* The next set of functions return the gpio table and fill in the number of entries for
+ * each table.
+ */
+
+const struct pad_config *variant_gpio_table(size_t *num);
+const struct pad_config *variant_early_gpio_table(size_t *num);
+const struct pad_config *variant_romstage_gpio_table(size_t *num);
+void fw_config_gpio_padbased_override(struct pad_config *padbased_table);
+
+const struct mb_cfg *variant_memory_params(void);
+void variant_get_spd_info(struct mem_spd *spd_info);
+int variant_memory_sku(void);
+bool variant_is_half_populated(void);
+void variant_update_soc_chip_config(struct soc_intel_meteorlake_config *config);
+
+/* Get soc power limit config struct for current CPU sku */
+struct soc_power_limits_config *variant_get_soc_power_limit_config(void);
+
+enum s0ix_entry {
+	S0IX_EXIT,
+	S0IX_ENTRY,
+};
+
+void variant_generate_s0ix_hook(enum s0ix_entry entry);
+
+/* Modify devictree settings during ramstage by baseboard */
+void baseboard_devtree_update(void);
+/* Modify devictree settings during ramstage by dedicated variant */
+void variant_devtree_update(void);
+
+#endif /*__BASEBOARD_VARIANTS_H__ */