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mb/google/geralt: Add support for getting panel id 

According to ID table(go/geralt-id), we add panel_id() to read the
panel id from auxadc channel 5.

BUG=b:244208960
TEST=emerge-geralt coreboot

Change-Id: I2c0f4ee5a642c41dda9594fbaf2c63f2b2ebac6e
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70402
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Bo-Chen Chen 2022-12-01 16:35:48 +08:00 committed by Yu-Ping Wu
parent 7e11dcb510
commit c5d0c94868
2 changed files with 39 additions and 0 deletions
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31
src/mainboard/google/geralt/boardid.c
View File

@ -5,6 +5,7 @@
#include <console/console.h> #include <console/console.h>
#include <ec/google/chromeec/ec.h> #include <ec/google/chromeec/ec.h>
#include <soc/auxadc.h> #include <soc/auxadc.h>
#include "panel.h"
/* board_id is provided by ec/google/chromeec/ec_boardid.c */ /* board_id is provided by ec/google/chromeec/ec_boardid.c */
@ -16,6 +17,8 @@ enum {
RAM_ID_HIGH_CHANNEL = 3, RAM_ID_HIGH_CHANNEL = 3,
/* SKU ID */ /* SKU ID */
SKU_ID_CHANNEL = 4, SKU_ID_CHANNEL = 4,
/* PANEL ID */
PANEL_ID_CHANNEL = 5,
}; };
static const unsigned int ram_voltages[ADC_LEVELS] = { static const unsigned int ram_voltages[ADC_LEVELS] = {
@ -34,10 +37,27 @@ static const unsigned int ram_voltages[ADC_LEVELS] = {
[11] = 1342600, [11] = 1342600,
}; };
static const unsigned int panel_voltages[ADC_LEVELS] = {
/* ID : Voltage (unit: uV) */
[0] = 0,
[1] = 283000,
[2] = 394000,
[3] = 503000,
[4] = 608000,
[5] = 712000,
[6] = 823000,
[7] = 937000,
[8] = 1046000,
[9] = 1155000,
[10] = 1277000,
[11] = 1434000,
};
static const unsigned int *adc_voltages[] = { static const unsigned int *adc_voltages[] = {
[RAM_ID_LOW_CHANNEL] = ram_voltages, [RAM_ID_LOW_CHANNEL] = ram_voltages,
[RAM_ID_HIGH_CHANNEL] = ram_voltages, [RAM_ID_HIGH_CHANNEL] = ram_voltages,
[SKU_ID_CHANNEL] = ram_voltages, [SKU_ID_CHANNEL] = ram_voltages,
[PANEL_ID_CHANNEL] = panel_voltages,
}; };
static uint32_t get_adc_index(unsigned int channel) static uint32_t get_adc_index(unsigned int channel)
@ -58,6 +78,17 @@ static uint32_t get_adc_index(unsigned int channel)
return id; return id;
} }
/* Returns the ID for LCD module (type of panel). */
uint32_t panel_id(void)
{
static uint32_t cached_panel_id = BOARD_ID_INIT;
if (cached_panel_id == BOARD_ID_INIT)
cached_panel_id = get_adc_index(PANEL_ID_CHANNEL);
return cached_panel_id;
}
uint32_t sku_id(void) uint32_t sku_id(void)
{ {
static uint32_t cached_sku_code = BOARD_ID_INIT; static uint32_t cached_sku_code = BOARD_ID_INIT;

8
src/mainboard/google/geralt/panel.h Normal file
View File

@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __MAINBOARD_GOOGLE_GERALT_PANEL_H__
#define __MAINBOARD_GOOGLE_GERALT_PANEL_H__
uint32_t panel_id(void);
#endif