[PATCH 2/2] arm64: renesas: Enable PM and PM_GENERIC_DOMAINS for SoCs with PM Domains
Simon Horman
horms+renesas at verge.net.au
Thu Feb 25 15:52:56 PST 2016
From: Geert Uytterhoeven <geert+renesas at glider.be>
All supported Renesas ARM64 SoCs have clock and power domains. To ensure
proper operation of on-SoC modules, module clocks must be ungated, and
power domains must be powered up when needed.
Currently the user can choose to build a kernel with power management
enabled or disabled:
- If CONFIG_PM=y, power domains and/or module clocks are handled
dynamically by Runtime PM and the generic power domain.
- If CONFIG_PM=n, power domains are assumed to be powered up by reset
state or by the boot loader, and module clocks are handled by the
legacy clock domain on driver (un)bind.
The latter is implemented using a platform bus notifier, which
applies not only to all on-SoC devices, but to all platform devices
present in the system.
To remove the dependency on implicit assumptions, and to get rid of the
peculiarities of the legacy clock domain, enable CONFIG_PM and
CONFIG_PM_GENERIC_DOMAINS unconditionally.
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
Signed-off-by: Simon Horman <horms+renesas at verge.net.au>
---
arch/arm64/Kconfig.platforms | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index 757220cb1b7f..e011ac0e17a3 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -76,7 +76,8 @@ config ARCH_RENESAS
bool "Renesas SoC Platforms"
select ARCH_SHMOBILE
select PINCTRL
- select PM_GENERIC_DOMAINS if PM
+ select PM
+ select PM_GENERIC_DOMAINS
select RENESAS_IRQC
help
This enables support for the ARMv8 based Renesas SoCs.
--
2.7.0.rc3.207.g0ac5344
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