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usb: xhci-mtk: make the reference clock optional
authorChunfeng Yun <chunfeng.yun@mediatek.com>
Tue, 7 Feb 2017 06:13:33 +0000 (14:13 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 8 Feb 2017 06:44:52 +0000 (07:44 +0100)
commitf3c4c73704b2e1a66c74504721e0af403174fdd3
tree9eee969b41de846df2fb80dee42241e0b8aaaf27
parentca12cb7cb06d08e54e3ac23b1ebe5ed81d68dbf0
usb: xhci-mtk: make the reference clock optional

Make the reference clock optional for DTS backward compatibility
and ignore the error if it does not exist.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/xhci-mtk.c