serial: sh-sci: Drop the interface clock

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As no platform defines an interface clock the SCI driver always falls
back to a clock named "peripheral_clk".
  - On SH platforms that clock is the base clock for the SCI functional
    clock and has the same frequency,
  - On ARM platforms that clock doesn't exist, and clk_get() will return
    the default clock for the device.
We can thus make the functional clock mandatory and drop the interface
clock.

EPROBE_DEFER is handled for clocks that may be referenced from DT (i.e.
"fck", and the deprecated "sci_ick").

Cc: devicetree@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
[geert: Handle EPROBE_DEFER, reformat description, break long comment line]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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This commit is contained in:

Laurent Pinchart 2015-09-14 15:14:23 +03:00 • committed by Geert Uytterhoeven

parent 8005c49d9a

commit a9ec81f4ed

2 changed files with 43 additions and 25 deletions

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4

Documentation/devicetree/bindings/serial/renesas,sci-serial.txt

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64

drivers/tty/serial/sh-sci.c

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