mb/intel/ehlcrb: Remove board ID detection via EC

Since there is no EC support on EHL CRB, this patch removes board
ID detection via EC (board_id.c & board_id.h) and its related
files. Temporarily removes variant_memcfg_config function in
romstage_fsp_param.c, will be added back when updating memory
configs later.

Signed-off-by: Tan, Lean Sheng <lean.sheng.tan@intel.com>
Change-Id: I40d96285dc05ec5faabc123950b6b3728299e99a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48121
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/intel/elkhartlake_crb/Makefile.inc

@@ -5,11 +5,8 @@ subdirs-y += spd
 bootblock-y += bootblock.c
 
 romstage-y += romstage_fsp_params.c
-romstage-y += board_id.c
 
 ramstage-y += mainboard.c
-ramstage-y += board_id.c
-
 
 subdirs-y += variants/baseboard
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/include

src/mainboard/intel/elkhartlake_crb/board_id.c

@@ -1,43 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#include <boardid.h>
-#include <ec/acpi/ec.h>
-#include <ec/google/chromeec/ec.h>
-#include <stdint.h>
-
-#include "board_id.h"
-
-static uint32_t get_board_id_via_ext_ec(void)
-{
-	uint32_t id = BOARD_ID_INIT;
-
-	if (google_chromeec_get_board_version(&id))
-		id = BOARD_ID_UNKNOWN;
-
-	return id;
-}
-
-/*
- * Get Board ID via EC I/O port write/read
- * Board id is 5 bit, so mask other bits while returning board id.
- */
-int get_board_id(void)
-{
-	MAYBE_STATIC_NONZERO int id = -1;
-
-	if (id < 0) {
-		if (CONFIG(EC_GOOGLE_CHROMEEC)) {
-			id = get_board_id_via_ext_ec();
-		} else {
-			uint8_t buffer[2];
-			uint8_t index;
-			if (send_ec_command(EC_FAB_ID_CMD) == 0) {
-				for (index = 0; index < sizeof(buffer); index++)
-					buffer[index] = recv_ec_data();
-				id = (buffer[0] << 8) | buffer[1];
-			}
-		}
-	}
-
-	return (id & 0x1f);
-}

src/mainboard/intel/elkhartlake_crb/board_id.h

@@ -1,15 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#ifndef _MAINBOARD_COMMON_BOARD_ID_H_
-#define _MAINBOARD_COMMON_BOARD_ID_H_
-
-/* Board/FAB ID Command */
-#define EC_FAB_ID_CMD	0x0D
-
-/*
- * Returns board information (board id[15:8] and
- * Fab info[7:0]) on success and < 0 on error
- */
-int get_board_id(void);
-
-#endif /* _MAINBOARD_COMMON_BOARD_ID_H_ */

src/mainboard/intel/elkhartlake_crb/romstage_fsp_params.c

@@ -4,7 +4,6 @@
 #include <console/console.h>
 #include <soc/meminit.h>
 #include <soc/romstage.h>
-#include "board_id.h"
 
 void mainboard_memory_init_params(FSPM_UPD *memupd)
 {

src/mainboard/intel/elkhartlake_crb/variants/baseboard/include/baseboard/variants.h

@@ -13,6 +13,6 @@ const struct pad_config *variant_gpio_table(size_t *num);
 const struct pad_config *variant_early_gpio_table(size_t *num);
 
 /* This function returns SPD related FSP-M mainboard configs */
-const struct mb_cfg *variant_memcfg_config(uint8_t board_id);
+const struct mb_cfg *variant_memcfg_config(void);
 
 #endif /*__BASEBOARD_VARIANTS_H__ */

src/mainboard/intel/elkhartlake_crb/variants/ehlcrb/memory.c

@@ -1,16 +1,8 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <baseboard/variants.h>
-#include <console/console.h>
 #include <gpio.h>
 #include <soc/meminit.h>
 #include <soc/romstage.h>
 
 /* ToDo : Fill EHL related memory configs */
-
-const struct mb_cfg *variant_memcfg_config(uint8_t board_id)
-{
-	/* ToDo : Fill EHL related memory configs */
-
-	die("unsupported board id : 0x%x\n", board_id);
-}