diff options
| author | Moritz Fischer | 2017-01-16 09:46:06 -0800 |
|---|---|---|
| committer | Heiko Schocher | 2017-01-18 06:37:57 +0100 |
| commit | 12e8d5841540ff3522db2596670be8996f07131a (patch) | |
| tree | 262f8e98fa70723d5d8c861dc97cfbb22f42800d /drivers/i2c | |
| parent | bfd07670a48d9fbf22646c93e07dcd8cbc8d0864 (diff) | |
i2c: mux: Allow muxes to work as children of i2c bus without i2c-parent
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.fischer@ettus.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: u-boot@lists.denx.de
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/muxes/i2c-mux-uclass.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/i2c/muxes/i2c-mux-uclass.c b/drivers/i2c/muxes/i2c-mux-uclass.c index 7a698b62b5a..db086efe612 100644 --- a/drivers/i2c/muxes/i2c-mux-uclass.c +++ b/drivers/i2c/muxes/i2c-mux-uclass.c @@ -86,6 +86,16 @@ 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) |