DP_AUX_MAX_PAYLOAD_BYTES
uint8_t buf[DP_AUX_MAX_PAYLOAD_BYTES];
uint8_t buf[DP_AUX_MAX_PAYLOAD_BYTES];
static int dp_aux_i2c_transfer_size __read_mostly = DP_AUX_MAX_PAYLOAD_BYTES;
dp_aux_i2c_transfer_size = clamp(dp_aux_i2c_transfer_size, 1, DP_AUX_MAX_PAYLOAD_BYTES);