soc: renesas: rcar-sysc: Add DT support for SYSC PM domains

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Populate the SYSC PM domains from DT, based on the presence of a device
node for the System Controller. The actual power area hiearchy, and
features of specific areas are obtained from tables in the C code.

The SYSCIER and SYSCIMR register values are derived from the power areas
present, which will help to get rid of the hardcoded values in R-Car H1
and R-Car Gen2 platform code later.

Initialization is done from an early_initcall(), to make sure the PM
Domains are initialized before secondary CPU bringup.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

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Geert Uytterhoeven 2016-04-20 14:02:38 +02:00 • committed by Simon Horman

parent 68667cebfc

commit dcc09fd143

2 changed files with 254 additions and 1 deletions

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202

drivers/soc/renesas/rcar-sysc.c

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53

drivers/soc/renesas/rcar-sysc.h

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