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| author | Heiko Schocher <hs@denx.de> | 2008-10-15 09:39:47 +0200 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-10-18 21:54:02 +0200 |
| commit | 67b23a322848d828a5e45c0567b72762bfde7abf (patch) | |
| tree | 8dc26375504482eaa0e9600a6a52a6bb047dccf3 /include | |
| parent | c24853644ddd2dd2e4246b5854a93e6254a14092 (diff) | |
| download | u-boot-imx-67b23a322848d828a5e45c0567b72762bfde7abf.zip u-boot-imx-67b23a322848d828a5e45c0567b72762bfde7abf.tar.gz u-boot-imx-67b23a322848d828a5e45c0567b72762bfde7abf.tar.bz2 | |
I2C: adding new "i2c bus" Command to the I2C Subsystem.
With this Command it is possible to add new I2C Busses,
which are behind 1 .. n I2C Muxes. Details see README.
Signed-off-by: Heiko Schocher <hs@denx.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/configs/mgcoge.h | 1 | ||||
| -rw-r--r-- | include/configs/mgsuvd.h | 1 | ||||
| -rw-r--r-- | include/i2c.h | 23 |
3 files changed, 25 insertions, 0 deletions
diff --git a/include/configs/mgcoge.h b/include/configs/mgcoge.h index 398e092..6564c15 100644 --- a/include/configs/mgcoge.h +++ b/include/configs/mgcoge.h @@ -203,6 +203,7 @@ #define CONFIG_I2C_CMD_TREE 1 #define CFG_MAX_I2C_BUS 2 #define CFG_I2C_INIT_BOARD 1 +#define CONFIG_I2C_MUX 1 /* EEprom support */ #define CFG_I2C_EEPROM_ADDR_LEN 1 diff --git a/include/configs/mgsuvd.h b/include/configs/mgsuvd.h index 2048575..e2a7c07 100644 --- a/include/configs/mgsuvd.h +++ b/include/configs/mgsuvd.h @@ -374,6 +374,7 @@ #define CONFIG_I2C_CMD_TREE 1 #define CFG_MAX_I2C_BUS 2 #define CFG_I2C_INIT_BOARD 1 +#define CONFIG_I2C_MUX 1 /* EEprom support */ #define CFG_I2C_EEPROM_ADDR_LEN 1 diff --git a/include/i2c.h b/include/i2c.h index a6e797a..9f771dd 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -85,6 +85,29 @@ void i2c_init(int speed, int slaveaddr); void i2c_init_board(void); #endif +#if defined(CONFIG_I2C_MUX) + +typedef struct _mux { + uchar chip; + uchar channel; + char *name; + struct _mux *next; +} I2C_MUX; + +typedef struct _mux_device { + int busid; + I2C_MUX *mux; /* List of muxes, to reach the device */ + struct _mux_device *next; +} I2C_MUX_DEVICE; + +int i2c_mux_add_device(I2C_MUX_DEVICE *dev); + +I2C_MUX_DEVICE *i2c_mux_search_device(int id); +I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf); +int i2x_mux_select_mux(int bus); +int i2c_mux_ident_muxstring_f (uchar *buf); +#endif + /* * Probe the given I2C chip address. Returns 0 if a chip responded, * not 0 on failure. |