linux-vybrid_public/arch/arm/plat-s3c/include/plat/iic.h

/* arch/arm/mach-s3c2410/include/mach/iic.h
 *
 * Copyright (c) 2004 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * S3C2410 - I2C Controller platfrom_device info
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#ifndef __ASM_ARCH_IIC_H
#define __ASM_ARCH_IIC_H __FILE__

#define S3C_IICFLG_FILTER	(1<<0)	/* enable s3c2440 filter */

/* Notes:
 *	1) All frequencies are expressed in Hz
 *	2) A value of zero is `do not care`
*/

struct s3c2410_platform_i2c {
	int		bus_num;	/* bus number to use */
	unsigned int	flags;
	unsigned int	slave_addr;	/* slave address for controller */
	unsigned long	bus_freq;	/* standard bus frequency */
	unsigned long	max_freq;	/* max frequency for the bus */
	unsigned long	min_freq;	/* min frequency for the bus */
	unsigned int	sda_delay;	/* pclks (s3c2440 only) */

	void	(*cfg_gpio)(struct platform_device *dev);
};

/**
 * s3c_i2c0_set_platdata - set platform data for i2c0 device
 * @i2c: The platform data to set, or NULL for default data.
 *
 * Register the given platform data for use with the i2c0 device. This
 * call copies the platform data, so the caller can use __initdata for
 * their copy.
 *
 * This call will set cfg_gpio if is null to the default platform
 * implementation.
 *
 * Any user of s3c_device_i2c0 should call this, even if it is with
 * NULL to ensure that the device is given the default platform data
 * as the driver will no longer carry defaults.
 */
extern void s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *i2c);
extern void s3c_i2c1_set_platdata(struct s3c2410_platform_i2c *i2c);

/* defined by architecture to configure gpio */
extern void s3c_i2c0_cfg_gpio(struct platform_device *dev);
extern void s3c_i2c1_cfg_gpio(struct platform_device *dev);

#endif /* __ASM_ARCH_IIC_H */