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mb/google/bluey: Allow charger behind DAM

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To support chargers connected through a Debug Accessory Mode (DAM)
cable, the PMIC must be configured to allow legacy charging paths even
when a debug accessory is detected.

Update the charging initialization to clear the suspend bit in the
SCHG_TYPE_C_SUSPEND_LEGACY_CHARGERS register. This ensures the SMB2360
can correctly negotiate and draw power when a DAM cable is in use.

BUG=none
TEST=Verify SMB2360 charging configuration on Google/Quartz.

Change-Id: I8d22abf92f4e8967efbe2ee3320c4a1461d6ef88
Signed-off-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/91832
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jayvik Desai <jayvik@google.com>
This commit is contained in:
Kapil Porwal 2026-03-24 14:41:58 +05:30 • committed by Subrata Banik
commit 1c6f4618b6
1 changed files with 5 additions and 0 deletions
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5
src/mainboard/google/bluey/charging.c
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@ -25,6 +25,9 @@
#define SCHG_TYPE_C_TYPE_C_DEBUG_ACCESS_SRC_CFG 0x2B4C
#define SMB1_SCHG_TYPE_C_TYPE_C_DEBUG_ACCESS_SRC_CFG \
((SMB1_SLAVE_ID << 16) | SCHG_TYPE_C_TYPE_C_DEBUG_ACCESS_SRC_CFG)
#define SCHG_TYPE_C_SUSPEND_LEGACY_CHARGERS 0x2B90
#define SMB1_SCHG_TYPE_C_SUSPEND_LEGACY_CHARGERS \
((SMB1_SLAVE_ID << 16) | SCHG_TYPE_C_SUSPEND_LEGACY_CHARGERS)
#define SCHG_CHGR_CHARGING_FCC 0x260A
#define SMB1_CHGR_CHARGING_FCC ((SMB1_SLAVE_ID << 16) | SCHG_CHGR_CHARGING_FCC)
#define SMB2_CHGR_CHARGING_FCC ((SMB2_SLAVE_ID << 16) | SCHG_CHGR_CHARGING_FCC)
@ -33,6 +36,7 @@
#define FCC_DISABLE 0x8c
#define EN_DEBUG_ACCESS_SNK 0x1B
#define EN_DEBUG_ACCESS_SRC 0x01
#define EN_SWITCHER_DAM_500 0x05
#define PMC8380F_SLAVE_ID 0x05
#define GPIO07_MODE_CTL 0x8E40
@ -234,6 +238,7 @@ void configure_debug_access_port(void)
printk(BIOS_INFO, "Enable support of source and sink modes for debug access port\n");
spmi_write8(SMB1_SCHG_TYPE_C_TYPE_C_DEBUG_ACCESS_SRC_CFG, EN_DEBUG_ACCESS_SRC);
spmi_write8(SMB1_SCHG_TYPE_C_TYPE_C_DEBUG_ACCESS_SNK_CFG, EN_DEBUG_ACCESS_SNK);
spmi_write8(SMB1_SCHG_TYPE_C_SUSPEND_LEGACY_CHARGERS, EN_SWITCHER_DAM_500);
}
/*