release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/plat-samsung/include/plat/iic.h

   1 /* arch/arm/plat-s3c/include/plat/iic.h
   2  *
   3  * Copyright 2004-2009 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *
   6  * S3C - I2C Controller platform_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 /**
  19  *      struct s3c2410_platform_i2c - Platform data for s3c I2C.
  20  *      @bus_num: The bus number to use (if possible).
  21  *      @flags: Any flags for the I2C bus (E.g. S3C_IICFLK_FILTER).
  22  *      @slave_addr: The I2C address for the slave device (if enabled).
  23  *      @frequency: The desired frequency in Hz of the bus.  This is
  24  *                  guaranteed to not be exceeded.  If the caller does
  25  *                  not care, use zero and the driver will select a
  26  *                  useful default.
  27  *      @sda_delay: The delay (in ns) applied to SDA edges.
  28  *      @cfg_gpio: A callback to configure the pins for I2C operation.
  29  */
  30 struct s3c2410_platform_i2c {
  31         int             bus_num;
  32         unsigned int    flags;
  33         unsigned int    slave_addr;
  34         unsigned long   frequency;
  35         unsigned int    sda_delay;
  36
  37         void    (*cfg_gpio)(struct platform_device *dev);
  38 };
  39
  40 /**
  41  * s3c_i2c0_set_platdata - set platform data for i2c0 device
  42  * @i2c: The platform data to set, or NULL for default data.
  43  *
  44  * Register the given platform data for use with the i2c0 device. This
  45  * call copies the platform data, so the caller can use __initdata for
  46  * their copy.
  47  *
  48  * This call will set cfg_gpio if is null to the default platform
  49  * implementation.
  50  *
  51  * Any user of s3c_device_i2c0 should call this, even if it is with
  52  * NULL to ensure that the device is given the default platform data
  53  * as the driver will no longer carry defaults.
  54  */
  55 extern void s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *i2c);
  56 extern void s3c_i2c1_set_platdata(struct s3c2410_platform_i2c *i2c);
  57 extern void s3c_i2c2_set_platdata(struct s3c2410_platform_i2c *i2c);
  58
  59 /* defined by architecture to configure gpio */
  60 extern void s3c_i2c0_cfg_gpio(struct platform_device *dev);
  61 extern void s3c_i2c1_cfg_gpio(struct platform_device *dev);
  62 extern void s3c_i2c2_cfg_gpio(struct platform_device *dev);
  63
  64 #endif /* __ASM_ARCH_IIC_H */