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linux-vybrid_pu...
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arch
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arm
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plat-nomadik
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include
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plat
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i2c.h

i2c.h 1.1 KB
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  1. /*
    2. 

  2.  * Copyright (C) 2009 ST-Ericsson
    3. 

  3.  *
    4. 

  4.  * This program is free software; you can redistribute it and/or modify
    5. 

  5.  * it under the terms of the GNU General Public License version 2, as
    6. 

  6.  * published by the Free Software Foundation.
    7. 

  7.  */
    8. 

  8. #ifndef __PLAT_I2C_H
    9. 

  9. #define __PLAT_I2C_H
    10. 

  10. 

  11. enum i2c_freq_mode {
    12. 

  12. 	I2C_FREQ_MODE_STANDARD,		/* up to 100 Kb/s */
    13. 

  13. 	I2C_FREQ_MODE_FAST,		/* up to 400 Kb/s */
    14. 

  14. 	I2C_FREQ_MODE_FAST_PLUS,	/* up to 1 Mb/s */
    15. 

  15. 	I2C_FREQ_MODE_HIGH_SPEED	/* up to 3.4 Mb/s */
    16. 

  16. };
    17. 

  17. 

  18. /**
    19. 

  19.  * struct nmk_i2c_controller - client specific controller configuration
    20. 

  20.  * @clk_freq:	clock frequency for the operation mode
    21. 

  21.  * @slsu:	Slave data setup time in ns.
    22. 

  22.  *		The needed setup time for three modes of operation
    23. 

  23.  *		are 250ns, 100ns and 10ns respectively thus leading
    24. 

  24.  *		to the values of 14, 6, 2 for a 48 MHz i2c clk
    25. 

  25.  * @tft:	Tx FIFO Threshold in bytes
    26. 

  26.  * @rft:	Rx FIFO Threshold in bytes
    27. 

  27.  * @sm:		speed mode
    28. 

  28.  */
    29. 

  29. struct nmk_i2c_controller {
    30. 

  30. 	unsigned long	clk_freq;
    31. 

  31. 	unsigned short	slsu;
    32. 

  32. 	unsigned char 	tft;
    33. 

  33. 	unsigned char 	rft;
    34. 

  34. 	enum i2c_freq_mode	sm;
    35. 

  35. };
    36. 

  36. 

  37. #endif	/* __PLAT_I2C_H */
    38.