diff options
Diffstat (limited to 'zephyr/projects/nissa/src/nereid/usbc.c')
| -rw-r--r-- | zephyr/projects/nissa/src/nereid/usbc.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/zephyr/projects/nissa/src/nereid/usbc.c b/zephyr/projects/nissa/src/nereid/usbc.c index 95bb1a5fdc..5219c252e5 100644 --- a/zephyr/projects/nissa/src/nereid/usbc.c +++ b/zephyr/projects/nissa/src/nereid/usbc.c @@ -4,6 +4,7 @@ */ #include <zephyr/logging/log.h> +#include <ap_power/ap_power.h> #include "charge_state_v2.h" #include "chipset.h" @@ -80,6 +81,52 @@ __override bool pd_check_vbus_level(int port, enum vbus_level level) return false; } +/* + * Putting chargers into LPM when in suspend reduces power draw by about 8mW + * per charger, but also seems critical to correct operation in source mode: + * if chargers are not in LPM when a sink is first connected, VBUS sourcing + * works even if the partner is later removed (causing LPM entry) and + * reconnected (causing LPM exit). If in LPM initially, sourcing VBUS + * consistently causes the charger to report (apparently spurious) overcurrent + * failures. + * + * In short, this is important to making things work correctly but we don't + * understand why. + */ +static void board_chargers_suspend(struct ap_power_ev_callback *const cb, + const struct ap_power_ev_data data) +{ + void (*fn)(int chgnum); + + switch (data.event) { + case AP_POWER_SUSPEND: + fn = sm5803_enable_low_power_mode; + break; + case AP_POWER_RESUME: + fn = sm5803_disable_low_power_mode; + break; + default: + LOG_WRN("%s: power event %d is not recognized", + __func__, data.event); + return; + } + + fn(CHARGER_PRIMARY); + if (board_get_charger_chip_count() > 1) + fn(CHARGER_SECONDARY); +} + +static int board_chargers_suspend_init(const struct device *unused) +{ + static struct ap_power_ev_callback cb = { + .handler = board_chargers_suspend, + .events = AP_POWER_SUSPEND | AP_POWER_RESUME, + }; + ap_power_ev_add_callback(&cb); + return 0; +} +SYS_INIT(board_chargers_suspend_init, APPLICATION, 0); + int board_set_active_charge_port(int port) { int is_real_port = (port >= 0 && port < board_get_usb_pd_port_count()); |