mirror of https://gitee.com/openkylin/linux.git
38 lines
1.1 KiB
C
38 lines
1.1 KiB
C
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/*
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* Copyright (C) 2009 ST-Ericsson
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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 __PLAT_I2C_H
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#define __PLAT_I2C_H
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enum i2c_freq_mode {
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I2C_FREQ_MODE_STANDARD, /* up to 100 Kb/s */
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I2C_FREQ_MODE_FAST, /* up to 400 Kb/s */
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I2C_FREQ_MODE_FAST_PLUS, /* up to 1 Mb/s */
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I2C_FREQ_MODE_HIGH_SPEED /* up to 3.4 Mb/s */
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};
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/**
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* struct nmk_i2c_controller - client specific controller configuration
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* @clk_freq: clock frequency for the operation mode
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* @slsu: Slave data setup time in ns.
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* The needed setup time for three modes of operation
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* are 250ns, 100ns and 10ns respectively thus leading
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* to the values of 14, 6, 2 for a 48 MHz i2c clk
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* @tft: Tx FIFO Threshold in bytes
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* @rft: Rx FIFO Threshold in bytes
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* @sm: speed mode
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*/
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struct nmk_i2c_controller {
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unsigned long clk_freq;
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unsigned short slsu;
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unsigned char tft;
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unsigned char rft;
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enum i2c_freq_mode sm;
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};
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#endif /* __PLAT_I2C_H */
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