tx_client 30 drivers/tty/serial/tegra-tcu.c struct mbox_client tx_client, rx_client; tx_client 187 drivers/tty/serial/tegra-tcu.c tcu->tx_client.dev = &pdev->dev; tx_client 191 drivers/tty/serial/tegra-tcu.c tcu->tx = mbox_request_channel_byname(&tcu->tx_client, "tx");