From 67b23a322848d828a5e45c0567b72762bfde7abf Mon Sep 17 00:00:00 2001 From: Heiko Schocher Date: Wed, 15 Oct 2008 09:39:47 +0200 Subject: 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 --- drivers/i2c/soft_i2c.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) (limited to 'drivers/i2c') 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; } -- cgit v1.2.3