For mux check if the parent is already a device of UCLASS_I2C and if yes
just use that. Otherwise see if someone specified an i2c-parent phandle.
This mimics the behavior found in the Kernel, as it removes the
requirement to explicitly specify a i2c-parent phandle.
Signed-off-by: Moritz Fischer <moritz.fisc...@ettus.com>
Cc: Heiko Schocher <h...@denx.de>
Cc: Bin Meng <bmeng...@gmail.com>
Cc: Simon Glass <s...@chromium.org>
Cc: Michal Simek <michal.si...@xilinx.com>
Cc: u-boot@lists.denx.de
---
drivers/i2c/muxes/i2c-mux-uclass.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/i2c/muxes/i2c-mux-uclass.c
b/drivers/i2c/muxes/i2c-mux-uclass.c
index 7a698b6..e01b773 100644
--- a/drivers/i2c/muxes/i2c-mux-uclass.c
+++ b/drivers/i2c/muxes/i2c-mux-uclass.c
@@ -86,6 +86,15 @@ static int i2c_mux_post_probe(struct udevice *mux)
debug("%s: %s\n", __func__, mux->name);
priv->selected = -1;
+ /* if parent is of i2c uclass already, we'll take that, otherwise
+ * look if we find an i2c-parent phandle */
+ if (UCLASS_I2C == device_get_uclass_id(mux->parent)) {
+ priv->i2c_bus = dev_get_parent(mux);
+ debug("%s: bus=%p/%s\n", __func__, priv->i2c_bus,
+ priv->i2c_bus->name);
+ return 0;
+ }
+
ret = uclass_get_device_by_phandle(UCLASS_I2C, mux, "i2c-parent",
&priv->i2c_bus);
if (ret)
--
2.7.4
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