diff options
Diffstat (limited to 'board/zinger')
| -rw-r--r-- | board/zinger/usb_pd_policy.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/board/zinger/usb_pd_policy.c b/board/zinger/usb_pd_policy.c index b73b7fbaf0..e4aa2d1f98 100644 --- a/board/zinger/usb_pd_policy.c +++ b/board/zinger/usb_pd_policy.c @@ -82,6 +82,8 @@ static timestamp_t fault_deadline; #define VBUS_MV(mv) ((mv)*ADC_SCALE/VOLT_DIV/VDDA_MV) /* convert VBUS current in raw ADC value */ #define VBUS_MA(ma) ((ma)*ADC_SCALE*R_SENSE/1000*CURR_GAIN/VDDA_MV) +/* convert raw ADC value to mA */ +#define ADC_TO_CURR_MA(vbus) ((vbus)*1000/(ADC_SCALE*R_SENSE)*VDDA_MV/CURR_GAIN) /* Max current : 20% over 3A = 3.6A */ #define MAX_CURRENT VBUS_MA(3600) @@ -133,6 +135,9 @@ static int last_volt_idx; static int down_step; static uint64_t down_step_done_time; +/* output current measurement */ +int vbus_amp; + int pd_request_voltage(uint32_t rdo) { int op_ma = rdo & 0x3FF; @@ -200,7 +205,7 @@ void pd_power_supply_reset(int port) int pd_board_checks(void) { - int vbus_volt, vbus_amp; + int vbus_volt; int ovp_idx; /* Reload the watchdog */ @@ -329,6 +334,11 @@ int pd_custom_vdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload) case VDO_CMD_PING_ENABLE: pd_ping_enable(0, payload[1]); break; + case VDO_CMD_CURRENT: + /* return last measured current */ + payload[1] = ADC_TO_CURR_MA(vbus_amp); + rsize = 2; + break; default: /* Unknown : do not answer */ return 0; |