From: Thierry Reding treding@nvidia.com
This is useful to retrieve the U-Boot bus number of an I2C controller given a device tree node.
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/i2c/tegra_i2c.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/i2c/tegra_i2c.c b/drivers/i2c/tegra_i2c.c index 257b72f0f7cd..94453765369d 100644 --- a/drivers/i2c/tegra_i2c.c +++ b/drivers/i2c/tegra_i2c.c @@ -21,6 +21,7 @@ DECLARE_GLOBAL_DATA_PTR;
/* Information about i2c controller */ struct i2c_bus { + int node; int id; enum periph_id periph_id; int speed; @@ -400,6 +401,7 @@ static int process_nodes(const void *blob, int node_list[], int count, continue;
i2c_bus = &i2c_controllers[i]; + i2c_bus->node = node; i2c_bus->id = i;
if (i2c_get_config(blob, node, i2c_bus)) { @@ -624,6 +626,17 @@ int tegra_i2c_get_dvc_bus_num(void) return -1; }
+int i2c_get_bus_num_fdt(int node) +{ + unsigned int i; + + for (i = 0; i < TEGRA_I2C_NUM_CONTROLLERS; i++) + if (node == i2c_controllers[i].node) + return i; + + return -1; +} + /* * Register soft i2c adapters */