coresight: funnel: let runtime PM handle core clock
authorLinus Walleij <linus.walleij@linaro.org>
Tue, 19 May 2015 16:55:12 +0000 (10:55 -0600)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 24 May 2015 18:12:08 +0000 (11:12 -0700)
commite2d08f96d48dcca844ec1d50188c7a975bed1ded
treed32b4abc0444b1eeed6342983dadb950be5aa736
parent1b19f59dca70d802cee8a7d324c2340fdf0bd258
coresight: funnel: let runtime PM handle core clock

This uses runtime PM to manage the PCLK ("amba_pclk") instead
of screwing around with the framework by going in and taking
a copy from the amba device. The amba bus core will unprepare
and disable the clock when the device is unused when
CONFIG_PM is selected, else the clock will be always on.

Prior to this patch, as the AMBA primecell bus code enables
the PCLK, it would be left on after probe as
clk_disable_unprepare() was not called. Now the runtime PM
callbacks will make sure the PCLK is properly disabled
after probe.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/hwtracing/coresight/coresight-funnel.c