diff options
author | Alexander Shiyan <shc_work@mail.ru> | 2012-08-06 19:42:32 +0400 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-08-16 12:12:25 -0700 |
commit | f65444187a66bf54af32a10902877dd0326456d1 (patch) | |
tree | 9458139d0c7dd538d68cf6fa02e5ad4542162d83 /include/linux/platform_data/max310x.h | |
parent | 9574f36fb801035f6ab0fbb1b53ce2c12c17d100 (diff) |
serial: New serial driver MAX310X
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>
Diffstat (limited to 'include/linux/platform_data/max310x.h')
-rw-r--r-- | include/linux/platform_data/max310x.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/include/linux/platform_data/max310x.h b/include/linux/platform_data/max310x.h new file mode 100644 index 00000000000..91648bf5fc5 --- /dev/null +++ b/include/linux/platform_data/max310x.h @@ -0,0 +1,67 @@ +/* + * 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 |