From: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Date: Fri, 16 Nov 2012 00:33:59 +0000 (+0000)
Subject: of/net/mdio-gpio: Fix pdev->id issue when using devicetrees.
X-Git-Tag: v3.7-rc7~22^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3272dd9b0fe4bc09321219ab65dc5eda3e82445c;p=pandora-kernel.git

of/net/mdio-gpio: Fix pdev->id issue when using devicetrees.

When the mdio-gpio driver is probed via device trees, the platform
device id is set as -1, However the pdev->id is re-used as bus-id for
while creating mdio gpio bus.
So
For device tree case the mdio-gpio bus name appears as "gpio-ffffffff"
where as
for non-device tree case the bus name appears as "gpio-<bus-num>"

Which means the bus_id is fixed in device tree case, so we can't have
two mdio gpio buses via device trees. Assigning a logical bus number
via device tree solves the problem and the bus name is much consistent
with non-device tree bus name.

Without this patch
1. we can't support two mdio-gpio buses via device trees.
2. we should always pass gpio-ffffffff as bus name to phy_connect, very
different to non-device tree bus name.

So, setting up the bus_id via aliases from device tree is the right
solution and other drivers do similar thing.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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