This patch adds I2C mux support for the fsl_i2c driver. This
allows you to add "new" i2c busses, which are reached over
i2c muxes. For more infos, please look in the README and
search for CONFIG_I2C_MUX.
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
#define CONFIG_SYS_SPD_BUS_NUM 0
#endif
static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = CONFIG_SYS_SPD_BUS_NUM;
#define CONFIG_SYS_SPD_BUS_NUM 0
#endif
static unsigned int i2c_bus_num __attribute__ ((section (".data"))) = CONFIG_SYS_SPD_BUS_NUM;
+#if defined(CONFIG_I2C_MUX)
+static unsigned int i2c_bus_num_mux __attribute__ ((section ("data"))) = 0;
+#endif
static unsigned int i2c_bus_speed[2] = {CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SPEED};
static unsigned int i2c_bus_speed[2] = {CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SPEED};
int i2c_set_bus_num(unsigned int bus)
{
int i2c_set_bus_num(unsigned int bus)
{
+#if defined(CONFIG_I2C_MUX)
+ if (bus < CONFIG_SYS_MAX_I2C_BUS) {
+ i2c_bus_num = bus;
+ } else {
+ int ret;
+
+ ret = i2x_mux_select_mux(bus);
+ if (ret)
+ return ret;
+ i2c_bus_num = 0;
+ }
+ i2c_bus_num_mux = bus;
+#else
#ifdef CONFIG_SYS_I2C2_OFFSET
if (bus > 1) {
#else
#ifdef CONFIG_SYS_I2C2_OFFSET
if (bus > 1) {
#else
unsigned int i2c_get_bus_num(void)
{
unsigned int i2c_get_bus_num(void)
{
+#if defined(CONFIG_I2C_MUX)
+ return i2c_bus_num_mux;
+#else
}
unsigned int i2c_get_bus_speed(void)
}
unsigned int i2c_get_bus_speed(void)