| Srinidhi Kasagar | e208c44 | 2010-02-01 14:58:22 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 ST-Ericsson |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2, as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | #ifndef __PLAT_I2C_H |
| 9 | #define __PLAT_I2C_H |
| 10 | |
| 11 | enum i2c_freq_mode { |
| 12 | I2C_FREQ_MODE_STANDARD, /* up to 100 Kb/s */ |
| 13 | I2C_FREQ_MODE_FAST, /* up to 400 Kb/s */ |
| 14 | I2C_FREQ_MODE_FAST_PLUS, /* up to 1 Mb/s */ |
| 15 | I2C_FREQ_MODE_HIGH_SPEED /* up to 3.4 Mb/s */ |
| 16 | }; |
| 17 | |
| 18 | /** |
| 19 | * struct nmk_i2c_controller - client specific controller configuration |
| 20 | * @clk_freq: clock frequency for the operation mode |
| 21 | * @slsu: Slave data setup time in ns. |
| 22 | * The needed setup time for three modes of operation |
| 23 | * are 250ns, 100ns and 10ns respectively thus leading |
| 24 | * to the values of 14, 6, 2 for a 48 MHz i2c clk |
| 25 | * @tft: Tx FIFO Threshold in bytes |
| 26 | * @rft: Rx FIFO Threshold in bytes |
| 27 | * @sm: speed mode |
| 28 | */ |
| 29 | struct nmk_i2c_controller { |
| 30 | unsigned long clk_freq; |
| 31 | unsigned short slsu; |
| 32 | unsigned char tft; |
| 33 | unsigned char rft; |
| 34 | enum i2c_freq_mode sm; |
| 35 | }; |
| 36 | |
| 37 | #endif /* __PLAT_I2C_H */ |