50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
/*
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* Copyright (C) 2008 Google, Inc.
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* Author: Nick Pelly <npelly@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __ASM_ARCH_MSM_SERIAL_HS_H
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#define __ASM_ARCH_MSM_SERIAL_HS_H
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#include <linux/serial_core.h>
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/* API to request the uart clock off or on for low power management
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* Clients should call request_clock_off() when no uart data is expected,
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* and must call request_clock_on() before any further uart data can be
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* received. */
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extern void msm_hs_request_clock_off(struct uart_port *uport);
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extern void msm_hs_request_clock_on(struct uart_port *uport);
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/**
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* struct msm_serial_hs_platform_data
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* @rx_wakeup_irq: Rx activity irq
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* @rx_to_inject: extra character to be inserted to Rx tty on wakeup
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* @inject_rx: 1 = insert rx_to_inject. 0 = do not insert extra character
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* @exit_lpm_cb: function called before every Tx transaction
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*
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* This is an optional structure required for UART Rx GPIO IRQ based
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* wakeup from low power state. UART wakeup can be triggered by RX activity
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* (using a wakeup GPIO on the UART RX pin). This should only be used if
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* there is not a wakeup GPIO on the UART CTS, and the first RX byte is
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* known (eg., with the Bluetooth Texas Instruments HCILL protocol),
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* since the first RX byte will always be lost. RTS will be asserted even
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* while the UART is clocked off in this mode of operation.
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*/
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struct msm_serial_hs_platform_data {
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int rx_wakeup_irq;
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unsigned char inject_rx_on_wakeup;
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char rx_to_inject;
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void (*exit_lpm_cb)(struct uart_port *);
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};
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#endif
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