kernel/2.6.29.6-aldebaran-rt/arch/arm/plat-s3c/include/plat/iic.h

   1 /* arch/arm/mach-s3c2410/include/mach/iic.h
   2  *
   3  * Copyright (c) 2004 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * S3C2410 - I2C Controller platfrom_device info
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #ifndef __ASM_ARCH_IIC_H
  14 #define __ASM_ARCH_IIC_H __FILE__
  15
  16 #define S3C_IICFLG_FILTER       (1<<0)  /* enable s3c2440 filter */
  17
  18 /* Notes:
  19  *      1) All frequencies are expressed in Hz
  20  *      2) A value of zero is `do not care`
  21 */
  22
  23 struct s3c2410_platform_i2c {
  24         int             bus_num;        /* bus number to use */
  25         unsigned int    flags;
  26         unsigned int    slave_addr;     /* slave address for controller */
  27         unsigned long   bus_freq;       /* standard bus frequency */
  28         unsigned long   max_freq;       /* max frequency for the bus */
  29         unsigned long   min_freq;       /* min frequency for the bus */
  30         unsigned int    sda_delay;      /* pclks (s3c2440 only) */
  31
  32         void    (*cfg_gpio)(struct platform_device *dev);
  33 };
  34
  35 /**
  36  * s3c_i2c0_set_platdata - set platform data for i2c0 device
  37  * @i2c: The platform data to set, or NULL for default data.
  38  *
  39  * Register the given platform data for use with the i2c0 device. This
  40  * call copies the platform data, so the caller can use __initdata for
  41  * their copy.
  42  *
  43  * This call will set cfg_gpio if is null to the default platform
  44  * implementation.
  45  *
  46  * Any user of s3c_device_i2c0 should call this, even if it is with
  47  * NULL to ensure that the device is given the default platform data
  48  * as the driver will no longer carry defaults.
  49  */
  50 extern void s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *i2c);
  51 extern void s3c_i2c1_set_platdata(struct s3c2410_platform_i2c *i2c);
  52
  53 /* defined by architecture to configure gpio */
  54 extern void s3c_i2c0_cfg_gpio(struct platform_device *dev);
  55 extern void s3c_i2c1_cfg_gpio(struct platform_device *dev);
  56
  57 #endif /* __ASM_ARCH_IIC_H */