board input power: reduce SMBus transfer size from 32 to 16 bits

Omit the fractional part from board input power and send it from BMC FW to SMC
FW as a SMBus word write rather than a block write.

Signed-off-by: Petra Alexson <[email protected]>

Author: kikkiakki

app/dmc/src/main.c

@@ -134,10 +134,11 @@ void ina228_power_update(void)
 	sensor_sample_fetch_chan(ina228, SENSOR_CHAN_POWER);
 	sensor_channel_get(ina228, SENSOR_CHAN_POWER, &sensor_val);
 
-	int32_t power = (sensor_val.val1 << 16) + (sensor_val.val2 * 65536ULL) / 1000000ULL;
+	/* Only use integer part of sensor value */
+	int16_t power = sensor_val.val1 & 0xFFFF;
 
 	ARRAY_FOR_EACH_PTR(BH_CHIPS, chip) {
-		bh_chip_set_input_power(chip, &power);
+		bh_chip_set_input_power(chip, power);
 	}
 }
 

include/tenstorrent/bh_chip.h

@@ -116,8 +116,7 @@ void bh_chip_cancel_bus_transfer_clear(struct bh_chip *chip);
 
 cm2dmMessageRet bh_chip_get_cm2dm_message(struct bh_chip *chip);
 int bh_chip_set_static_info(struct bh_chip *chip, dmStaticInfo *info);
-int bh_chip_set_input_current(struct bh_chip *chip, int32_t *current);
-int bh_chip_set_input_power(struct bh_chip *chip, uint32_t *power);
+int bh_chip_set_input_power(struct bh_chip *chip, uint16_t power);
 int bh_chip_set_input_power_lim(struct bh_chip *chip, uint16_t max_power);
 int bh_chip_set_fan_rpm(struct bh_chip *chip, uint16_t rpm);