From mboxrd@z Thu Jan 1 00:00:00 1970 From: Moritz Fischer Date: Thu, 29 Dec 2016 14:50:10 -0800 Subject: [U-Boot] [PATCH] i2c: mux: Allow muxes to work as children of i2c bus without i2c-parent Message-ID: <1483051810-12511-1-git-send-email-moritz.fischer@ettus.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 Cc: Heiko Schocher Cc: Bin Meng Cc: Simon Glass Cc: Michal Simek Cc: u-boot at 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