include/linux/m41t00.h

   1 /*
   2  * Definitions for the ST M41T00 family of i2c rtc chips.
   3  *
   4  * Author: Mark A. Greer <mgreer@mvista.com>
   5  *
   6  * 2005, 2006 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 #ifndef _M41T00_H
  13 #define _M41T00_H
  14
  15 #define M41T00_DRV_NAME         "m41t00"
  16 #define M41T00_I2C_ADDR         0x68
  17
  18 #define M41T00_TYPE_M41T00      0
  19 #define M41T00_TYPE_M41T81      81
  20 #define M41T00_TYPE_M41T85      85
  21
  22 struct m41t00_platform_data {
  23         u8      type;
  24         u8      i2c_addr;
  25         u8      sqw_freq;
  26 };
  27
  28 /* SQW output disabled, this is default value by power on */
  29 #define M41T00_SQW_DISABLE      (0)
  30
  31 #define M41T00_SQW_32KHZ        (1<<4)          /* 32.768 KHz */
  32 #define M41T00_SQW_8KHZ         (2<<4)          /* 8.192 KHz */
  33 #define M41T00_SQW_4KHZ         (3<<4)          /* 4.096 KHz */
  34 #define M41T00_SQW_2KHZ         (4<<4)          /* 2.048 KHz */
  35 #define M41T00_SQW_1KHZ         (5<<4)          /* 1.024 KHz */
  36 #define M41T00_SQW_512HZ        (6<<4)          /* 512 Hz */
  37 #define M41T00_SQW_256HZ        (7<<4)          /* 256 Hz */
  38 #define M41T00_SQW_128HZ        (8<<4)          /* 128 Hz */
  39 #define M41T00_SQW_64HZ         (9<<4)          /* 64 Hz */
  40 #define M41T00_SQW_32HZ         (10<<4)         /* 32 Hz */
  41 #define M41T00_SQW_16HZ         (11<<4)         /* 16 Hz */
  42 #define M41T00_SQW_8HZ          (12<<4)         /* 8 Hz */
  43 #define M41T00_SQW_4HZ          (13<<4)         /* 4 Hz */
  44 #define M41T00_SQW_2HZ          (14<<4)         /* 2 Hz */
  45 #define M41T00_SQW_1HZ          (15<<4)         /* 1 Hz */
  46
  47 extern ulong m41t00_get_rtc_time(void);
  48 extern int m41t00_set_rtc_time(ulong nowtime);
  49
  50 #endif /* _M41T00_H */