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ARM: 5908/1: nomadik: add platform specific i2c configuration

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This adds the platform specific i2c configuration
data structures to setup the nomadik/ux500 i2c block.

Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Srinidhi Kasagar 2010-02-01 14:58:22 +01:00 committed by Russell King
parent 8e58ed34d9
commit e208c447bd
1 changed files with 37 additions and 0 deletions
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37
arch/arm/plat-nomadik/include/plat/i2c.h Normal file
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/*
* Copyright (C) 2009 ST-Ericsson
*
* 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 __PLAT_I2C_H
#define __PLAT_I2C_H
enum i2c_freq_mode {
I2C_FREQ_MODE_STANDARD, /* up to 100 Kb/s */
I2C_FREQ_MODE_FAST, /* up to 400 Kb/s */
I2C_FREQ_MODE_FAST_PLUS, /* up to 1 Mb/s */
I2C_FREQ_MODE_HIGH_SPEED /* up to 3.4 Mb/s */
};
/**
* struct nmk_i2c_controller - client specific controller configuration
* @clk_freq: clock frequency for the operation mode
* @slsu: Slave data setup time in ns.
* The needed setup time for three modes of operation
* are 250ns, 100ns and 10ns respectively thus leading
* to the values of 14, 6, 2 for a 48 MHz i2c clk
* @tft: Tx FIFO Threshold in bytes
* @rft: Rx FIFO Threshold in bytes
* @sm: speed mode
*/
struct nmk_i2c_controller {
unsigned long clk_freq;
unsigned short slsu;
unsigned char tft;
unsigned char rft;
enum i2c_freq_mode sm;
};
#endif /* __PLAT_I2C_H */