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[PATCH] PPC4xx: Add support for multiple I2C busses

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This patch adds support for multiple I2C busses on the PPC4xx
platforms. Define CONFIG_I2C_MULTI_BUS in the board config file
to make use of this feature.

It also merges the 405 and 440 i2c header files into one common
file 4xx_i2c.h.

Also the 4xx i2c reset procedure is reworked since I experienced
some problems with the first access on the 440SPe Katmai board.

Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Stefan Roese
2007-02-20 10:27:08 +01:00
parent 7372ca6822
commit 79b2d0bb2e
11 changed files with 381 additions and 361 deletions
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10
include/i2c.h
View File

@ -46,6 +46,16 @@
*/
#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
#if defined(CONFIG_I2C_MULTI_BUS)
#define CFG_MAX_I2C_BUS 2
#define I2C_GET_BUS() i2c_get_bus_num()
#define I2C_SET_BUS(a) i2c_set_bus_num(a)
#else
#define CFG_MAX_I2C_BUS 1
#define I2C_GET_BUS() 0
#define I2C_SET_BUS(a)
#endif
/*
* Initialization, must be called once on start up, may be called
* repeatedly to change the speed and slave addresses.