diff options
| 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 /drivers | |
| parent | c24853644ddd2dd2e4246b5854a93e6254a14092 (diff) | |
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 'drivers')
| -rw-r--r-- | drivers/i2c/soft_i2c.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/i2c/soft_i2c.c b/drivers/i2c/soft_i2c.c index 63e6a7b0d..0a9feb67c 100644 --- a/drivers/i2c/soft_i2c.c +++ b/drivers/i2c/soft_i2c.c @@ -223,10 +223,23 @@ unsigned int i2c_get_bus_num(void) int i2c_set_bus_num(unsigned int bus) { +#if defined(CONFIG_I2C_MUX) + if (bus < CFG_MAX_I2C_BUS) { + i2c_bus_num = bus; + } else { + int ret; + + ret = i2x_mux_select_mux(bus); + if (ret == 0) + i2c_bus_num = bus; + else + return ret; + } +#else if (bus >= CFG_MAX_I2C_BUS) return -1; i2c_bus_num = bus; - +#endif return 0; } |