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mb/google/kukui: change Jacuzzi followers LCMID to fixed value 

The LCM ID is not really used on Jacuzzi followers and the reference
design expects ADC to return 0. However, there were hardware design
issues so the returned value became unexpected numbers.

 - Juniper and Kappa returns 1.
 - Burnet and Esche returns 1 on normal boot, and 0 on recovery boot.
 - Cerise and Stern usually returns 0, and sometimes 1.

To fix that, we are changing LCM ID to fixed value for Jacuzzi followers.

BUG=b:170916885,b:171365301
BRANCH=kukui
TEST=1. emerge-jacuzzi coreboot
     2. check burnet/esche skuid correctly

Change-Id: I3b43b9153315ec65e9168c4e84ea844dff14d446
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46442
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
This commit is contained in:
Kevin Chiu 2020-10-15 14:39:21 +08:00 committed by Hung-Te Lin
parent 955ce24afc
commit bd21476f99
2 changed files with 22 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/mainboard/google/kukui/Kconfig
View File

@ -77,4 +77,10 @@ config BOARD_SDRAM_TABLE_OFFSET
default 0x10 if BOARD_GOOGLE_BURNET || BOARD_GOOGLE_ESCHE || BOARD_GOOGLE_FENNEL || BOARD_GOOGLE_CERISE || BOARD_GOOGLE_STERN
default 0x0
config BOARD_OVERRIDE_LCM_ID
hex
default 0x1 if BOARD_GOOGLE_JUNIPER || BOARD_GOOGLE_KAPPA || BOARD_GOOGLE_DAMU
default 0x1 if BOARD_GOOGLE_BURNET || BOARD_GOOGLE_ESCHE
default 0x0
endif

18
src/mainboard/google/kukui/boardid.c
View File

@ -1,5 +1,11 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* The boardid.c should provide board_id, sku_id, and ram_code.
* board_id is provided by ec/google/chromeec/ec_boardid.c.
* sku_id and ram_code are defined in this file.
*/
#include <assert.h>
#include <boardid.h>
#include <console/console.h>
@ -169,7 +175,15 @@ static uint8_t wfc_id(void)
return 0;
}
/* board_id is provided by ec/google/chromeec/ec_boardid.c */
/* Returns the ID for LCD module (type of panel). */
static uint8_t lcm_id(void)
{
/* LCM is unused on Jacuzzi followers. */
if (CONFIG(BOARD_GOOGLE_JACUZZI_COMMON))
return CONFIG_BOARD_OVERRIDE_LCM_ID;
return get_adc_index(LCM_ID_CHANNEL);
}
uint32_t sku_id(void)
{
@ -200,7 +214,7 @@ uint32_t sku_id(void)
* ADC4[4bit/L] = SKU ID from board straps.
*/
cached_sku_id = (wfc_id() << 8 |
get_adc_index(LCM_ID_CHANNEL) << 4 |
lcm_id() << 4 |
get_adc_index(SKU_ID_CHANNEL));
return cached_sku_id;