clk: of-provider: look at parent if registered device has no provider info

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It seems to be usual for MFD devices that the created 'clock sub-device'
do not have own DT node. The clock provider information is usually in the
main device node which is owned by the MFD device. Change the devm variant
of clk of-provider registration to check the parent device node if given
device has no own node or if the node does not contain the #clock-cells
property. In such case use the parent node if it contains the #clock-cells.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
[sboyd@kernel.org: Add some comment in the code and pull out logic into
a single function to return the provider device_node pointer]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

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Matti Vaittinen 2018-12-04 13:34:53 +02:00 • committed by Stephen Boyd

parent e45838b52c

commit 05502bf9eb

1 changed files with 27 additions and 4 deletions

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drivers/clk/clk.c

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