mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
f65444187a
This driver is a replacement for a MAX3107 driver with a lot of improvements and new features. The main differences from the old version: - Using the regmap. - Using devm_XXX-related functions. - The use of threaded IRQ with IRQF_ONESHOT flag allows the driver to the hardware that supports only level IRQ. - Improved error handling of serial port, improved FIFO handling, improved hardware & software flow control. - Advanced flags allows turn on RS-485 mode (Auto direction control). - Ability to load multiple instances of drivers. - Added support for MAX3108. - GPIO support. - Driver is quite ready for adding I2C support and support other ICs with compatible registers set (MAX3109, MAX14830). Signed-off-by: Alexander Shiyan <shc_work@mail.ru> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
|
|
* Maxim (Dallas) MAX3107/8 serial driver
|
|
*
|
|
* Copyright (C) 2012 Alexander Shiyan <shc_work@mail.ru>
|
|
*
|
|
* Based on max3100.c, by Christian Pellegrin <chripell@evolware.org>
|
|
* Based on max3110.c, by Feng Tang <feng.tang@intel.com>
|
|
* Based on max3107.c, by Aavamobile
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _MAX310X_H_
|
|
#define _MAX310X_H_
|
|
|
|
/*
|
|
* Example board initialization data:
|
|
*
|
|
* static struct max310x_pdata max3107_pdata = {
|
|
* .driver_flags = MAX310X_EXT_CLK,
|
|
* .uart_flags[0] = MAX310X_ECHO_SUPRESS | MAX310X_AUTO_DIR_CTRL,
|
|
* .frequency = 3686400,
|
|
* .gpio_base = -1,
|
|
* };
|
|
*
|
|
* static struct spi_board_info spi_device_max3107[] = {
|
|
* {
|
|
* .modalias = "max3107",
|
|
* .irq = IRQ_EINT3,
|
|
* .bus_num = 1,
|
|
* .chip_select = 1,
|
|
* .platform_data = &max3107_pdata,
|
|
* },
|
|
* };
|
|
*/
|
|
|
|
#define MAX310X_MAX_UARTS 1
|
|
|
|
/* MAX310X platform data structure */
|
|
struct max310x_pdata {
|
|
/* Flags global to driver */
|
|
const u8 driver_flags:2;
|
|
#define MAX310X_EXT_CLK (0x00000001) /* External clock enable */
|
|
#define MAX310X_AUTOSLEEP (0x00000002) /* Enable AutoSleep mode */
|
|
/* Flags global to UART port */
|
|
const u8 uart_flags[MAX310X_MAX_UARTS];
|
|
#define MAX310X_LOOPBACK (0x00000001) /* Loopback mode enable */
|
|
#define MAX310X_ECHO_SUPRESS (0x00000002) /* Enable echo supress */
|
|
#define MAX310X_AUTO_DIR_CTRL (0x00000004) /* Enable Auto direction
|
|
* control (RS-485)
|
|
*/
|
|
/* Frequency (extrenal clock or crystal) */
|
|
const int frequency;
|
|
/* GPIO base number (can be negative) */
|
|
const int gpio_base;
|
|
/* Called during startup */
|
|
void (*init)(void);
|
|
/* Called before finish */
|
|
void (*exit)(void);
|
|
/* Suspend callback */
|
|
void (*suspend)(int do_suspend);
|
|
};
|
|
|
|
#endif
|