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I2C: adding new "i2c bus" Command to the I2C Subsystem.

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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>
This commit is contained in:
Heiko Schocher
2008-10-15 09:39:47 +02:00
committed by Wolfgang Denk
parent c24853644d
commit 67b23a3228
7 changed files with 367 additions and 2 deletions
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23
include/i2c.h
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@@ -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.