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c8d833bf58
This patch adds I2C platform helpers required by s3c2440-i2c driver. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* arch/arm/plat-s3c/include/plat/iic.h
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*
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* Copyright 2004-2009 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C - I2C Controller platform_device info
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_ARCH_IIC_H
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#define __ASM_ARCH_IIC_H __FILE__
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#define S3C_IICFLG_FILTER (1<<0) /* enable s3c2440 filter */
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/**
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* struct s3c2410_platform_i2c - Platform data for s3c I2C.
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* @bus_num: The bus number to use (if possible).
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* @flags: Any flags for the I2C bus (E.g. S3C_IICFLK_FILTER).
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* @slave_addr: The I2C address for the slave device (if enabled).
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* @frequency: The desired frequency in Hz of the bus. This is
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* guaranteed to not be exceeded. If the caller does
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* not care, use zero and the driver will select a
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* useful default.
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* @sda_delay: The delay (in ns) applied to SDA edges.
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* @cfg_gpio: A callback to configure the pins for I2C operation.
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*/
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struct s3c2410_platform_i2c {
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int bus_num;
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unsigned int flags;
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unsigned int slave_addr;
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unsigned long frequency;
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unsigned int sda_delay;
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void (*cfg_gpio)(struct platform_device *dev);
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};
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/**
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* s3c_i2c0_set_platdata - set platform data for i2c0 device
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* @i2c: The platform data to set, or NULL for default data.
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*
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* Register the given platform data for use with the i2c0 device. This
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* call copies the platform data, so the caller can use __initdata for
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* their copy.
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*
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* This call will set cfg_gpio if is null to the default platform
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* implementation.
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*
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* Any user of s3c_device_i2c0 should call this, even if it is with
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* NULL to ensure that the device is given the default platform data
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* as the driver will no longer carry defaults.
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*/
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extern void s3c_i2c0_set_platdata(struct s3c2410_platform_i2c *i2c);
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extern void s3c_i2c1_set_platdata(struct s3c2410_platform_i2c *i2c);
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extern void s3c_i2c2_set_platdata(struct s3c2410_platform_i2c *i2c);
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/* defined by architecture to configure gpio */
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extern void s3c_i2c0_cfg_gpio(struct platform_device *dev);
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extern void s3c_i2c1_cfg_gpio(struct platform_device *dev);
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extern void s3c_i2c2_cfg_gpio(struct platform_device *dev);
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#endif /* __ASM_ARCH_IIC_H */
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