PMU_I2C_CMD
len = pmu_send(sc, PMU_I2C_CMD, 7, command, 16, resp);
len = pmu_send(sc, PMU_I2C_CMD, 1, command, 16, resp);
len = pmu_send(sc, PMU_I2C_CMD, send_len + 7, command, 16, resp);
len = pmu_send(sc, PMU_I2C_CMD, 7, command, 16, resp);
len = pmu_send(sc, PMU_I2C_CMD, 1, command, 16, resp);
len = pmu_send(sc, PMU_I2C_CMD, len, command, 16, resp);