GET_CMD_LEN
u8 get_brightness[GET_CMD_LEN], resp[GET_RESP_LEN];
get_brightness[0] = DELL_SOF(GET_CMD_LEN);
ret = dell_uart_bl_command(dell_bl, get_brightness, GET_CMD_LEN, resp, GET_RESP_LEN);
u8 get_version[GET_CMD_LEN], resp[MAX_RESP_LEN];
get_version[0] = DELL_SOF(GET_CMD_LEN);
ret = dell_uart_bl_command(dell_bl, get_version, GET_CMD_LEN, resp, MAX_RESP_LEN);