1 /* 2 * Copyright (C) 2008 Google, Inc. 3 * Author: Nick Pelly <npelly@google.com> 4 * 5 * This software is licensed under the terms of the GNU General Public 6 * License version 2, as published by the Free Software Foundation, and 7 * may be copied, distributed, and modified under those terms. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 */ 14 15 #ifndef __ASM_ARCH_MSM_SERIAL_HS_H 16 #define __ASM_ARCH_MSM_SERIAL_HS_H 17 18 #include <linux/serial_core.h> 19 20 /* API to request the uart clock off or on for low power management 21 * Clients should call request_clock_off() when no uart data is expected, 22 * and must call request_clock_on() before any further uart data can be 23 * received. */ 24 extern void msm_hs_request_clock_off(struct uart_port *uport); 25 extern void msm_hs_request_clock_on(struct uart_port *uport); 26 27 /** 28 * struct msm_serial_hs_platform_data 29 * @rx_wakeup_irq: Rx activity irq 30 * @rx_to_inject: extra character to be inserted to Rx tty on wakeup 31 * @inject_rx: 1 = insert rx_to_inject. 0 = do not insert extra character 32 * @exit_lpm_cb: function called before every Tx transaction 33 * 34 * This is an optional structure required for UART Rx GPIO IRQ based 35 * wakeup from low power state. UART wakeup can be triggered by RX activity 36 * (using a wakeup GPIO on the UART RX pin). This should only be used if 37 * there is not a wakeup GPIO on the UART CTS, and the first RX byte is 38 * known (eg., with the Bluetooth Texas Instruments HCILL protocol), 39 * since the first RX byte will always be lost. RTS will be asserted even 40 * while the UART is clocked off in this mode of operation. 41 */ 42 struct msm_serial_hs_platform_data { 43 int rx_wakeup_irq; 44 unsigned char inject_rx_on_wakeup; 45 char rx_to_inject; 46 void (*exit_lpm_cb)(struct uart_port *); 47 }; 48 49 #endif 50