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mb/google/bluey: Implement EC-based off-mode detection

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Update off-mode detection logic to use ChromeEC host events. If
the system is powered on by AC insertion (without power button
or lid open events), identify the boot as off-mode charging.

BUG=b:457566143
TEST=Verify off-mode battery charging on Google/Quenbi.

Change-Id: Ibfbbf9cbeabd229595f625104f94eb814012e2f8
Signed-off-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90511
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Kapil Porwal 2025-12-15 18:42:08 +05:30 • committed by Subrata Banik
commit 42c1947d99
2 changed files with 25 additions and 17 deletions
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16
src/mainboard/google/bluey/charging.c
View file

@ -43,19 +43,3 @@ void disable_slow_battery_charging(void)
spmi_write8(SMB1_CHGR_CHRG_EN_CMD, CHRG_DISABLE);
spmi_write8(SMB2_CHGR_CHRG_EN_CMD, CHRG_DISABLE);
}
/*
* is_off_mode - Check if the system is booting due to an off-mode power event.
*
* This function provides the board-level policy wrapper for detecting if the
* system power-on was triggered by an external charging event (e.g., cable
* insertion). This is typically used to enter LB_BOOT_MODE_OFFMODE_CHARGING.
*
* @return true if the system was triggered by a specific off-mode reason
* (e.g., charging cable insertion).
* @return false otherwise.
*/
bool is_off_mode(void)
{
return is_pon_on_ac();
}

26
src/mainboard/google/bluey/romstage.c
View file

@ -14,6 +14,31 @@
static enum boot_mode_t boot_mode = LB_BOOT_MODE_NORMAL;
/*
* is_off_mode - Check if the system is booting due to an off-mode power event.
*
* This function provides the board-level policy wrapper for detecting if the
* system power-on was triggered by an external charging event (e.g., cable
* insertion). This is typically used to enter LB_BOOT_MODE_OFFMODE_CHARGING.
*
* @return true if the system was triggered by a specific off-mode reason
* (e.g., charging cable insertion).
* @return false otherwise.
*/
bool is_off_mode(void)
{
const uint64_t manual_pwron_event_mask =
(EC_HOST_EVENT_MASK(EC_HOST_EVENT_POWER_BUTTON) |
EC_HOST_EVENT_MASK(EC_HOST_EVENT_LID_OPEN));
uint64_t ec_events = google_chromeec_get_events_b();
if (!(ec_events & manual_pwron_event_mask) &&
(ec_events & EC_HOST_EVENT_MASK(EC_HOST_EVENT_AC_CONNECTED)))
return true;
return false;
}
static void set_boot_mode(void)
{
if (!CONFIG(EC_GOOGLE_CHROMEEC))
@ -35,7 +60,6 @@ void platform_romstage_main(void)
/* QCLib: DDR init & train */
qclib_load_and_run();
/* Underlying PMIC registers are accessible only at this point */
set_boot_mode();
aop_fw_load_reset();