Re: [PATCH v5 9/9] drivers: soc: Add support for Exynos PMU driver

[Pankaj Dubey]

On 13 November 2015 at 15:58, Krzysztof Kozlowski
<k.kozlowski@xxxxxxxxxxx> wrote:
>
> On 13.11.2015 18:29, Pankaj Dubey wrote:
> > This patch moves Exynos PMU driver implementation from "arm/mach-exynos"
> > to "drivers/soc/samsung". This driver is mainly used for setting misc
> > bits of register from PMU IP of Exynos SoC which will be required to
> > configure before Suspend/Resume. Currently all these settings are done
> > in "arch/arm/mach-exynos/pmu.c" but moving ahead for ARM64 based SoC
> > support, there is a need of this PMU driver in driver/* folder.
> >
> > This driver uses existing DT binding information and there should
> > be no functionality change in the supported platforms.
> >
> > Signed-off-by: Amit Daniel Kachhap <amitdanielk@xxxxxxxxx>
> > Signed-off-by: Pankaj Dubey <pankaj.dubey@xxxxxxxxxxx>
> > ---
> >  arch/arm/mach-exynos/Kconfig                                   | 1 +
> >  arch/arm/mach-exynos/Makefile                                  | 4 +---
> >  drivers/soc/samsung/Kconfig                                    | 4 ++++
> >  drivers/soc/samsung/Makefile                                   | 4 ++++
> >  arch/arm/mach-exynos/pmu.c => drivers/soc/samsung/exynos-pmu.c | 0
> >  {arch/arm/mach-exynos => drivers/soc/samsung}/exynos-pmu.h     | 0
> >  {arch/arm/mach-exynos => drivers/soc/samsung}/exynos3250-pmu.c | 0
> >  {arch/arm/mach-exynos => drivers/soc/samsung}/exynos4-pmu.c    | 0
> >  {arch/arm/mach-exynos => drivers/soc/samsung}/exynos5250-pmu.c | 0
> >  {arch/arm/mach-exynos => drivers/soc/samsung}/exynos5420-pmu.c | 0
> >  10 files changed, 10 insertions(+), 3 deletions(-)
> >  rename arch/arm/mach-exynos/pmu.c => drivers/soc/samsung/exynos-pmu.c (100%)
> >  rename {arch/arm/mach-exynos => drivers/soc/samsung}/exynos-pmu.h (100%)
> >  rename {arch/arm/mach-exynos => drivers/soc/samsung}/exynos3250-pmu.c (100%)
> >  rename {arch/arm/mach-exynos => drivers/soc/samsung}/exynos4-pmu.c (100%)
> >  rename {arch/arm/mach-exynos => drivers/soc/samsung}/exynos5250-pmu.c (100%)
> >  rename {arch/arm/mach-exynos => drivers/soc/samsung}/exynos5420-pmu.c (100%)
> >
> > diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
> > index 83c85f5..874cb38 100644
> > --- a/arch/arm/mach-exynos/Kconfig
> > +++ b/arch/arm/mach-exynos/Kconfig
> > @@ -16,6 +16,7 @@ menuconfig ARCH_EXYNOS
> >       select ARM_GIC
> >       select COMMON_CLK_SAMSUNG
> >       select EXYNOS_THERMAL
> > +     select EXYNOS_PMU
> >       select EXYNOS_SROM if PM
> >       select HAVE_ARM_SCU if SMP
> >       select HAVE_S3C2410_I2C if I2C
> > diff --git a/arch/arm/mach-exynos/Makefile b/arch/arm/mach-exynos/Makefile
> > index 2d58063..34d29df 100644
> > --- a/arch/arm/mach-exynos/Makefile
> > +++ b/arch/arm/mach-exynos/Makefile
> > @@ -9,9 +9,7 @@ ccflags-$(CONFIG_ARCH_MULTIPLATFORM) += -I$(srctree)/$(src)/include -I$(srctree)
> >
> >  # Core
> >
> > -obj-$(CONFIG_ARCH_EXYNOS)    += exynos.o pmu.o exynos-smc.o firmware.o \
> > -                                     exynos3250-pmu.o exynos4-pmu.o \
> > -                                     exynos5250-pmu.o exynos5420-pmu.o
> > +obj-$(CONFIG_ARCH_EXYNOS)    += exynos.o exynos-smc.o firmware.o
> >
> >  obj-$(CONFIG_EXYNOS_CPU_SUSPEND) += pm.o sleep.o
> >  obj-$(CONFIG_PM_SLEEP)               += suspend.o
> > diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig
> > index 2833b5b..f545d6c 100644
> > --- a/drivers/soc/samsung/Kconfig
> > +++ b/drivers/soc/samsung/Kconfig
> > @@ -10,4 +10,8 @@ config EXYNOS_SROM
> >       bool
> >       depends on ARM && ARCH_EXYNOS && PM
> >
> > +config EXYNOS_PMU
> > +     bool
> > +     depends on ARCH_EXYNOS
> > +
> >  endmenu
> > diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile
> > index 9c554d5..26fb489 100644
> > --- a/drivers/soc/samsung/Makefile
> > +++ b/drivers/soc/samsung/Makefile
> > @@ -1 +1,5 @@
> >  obj-$(CONFIG_EXYNOS_SROM)    += exynos-srom.o
> > +ifdef CONFIG_ARM
> > +obj-$(CONFIG_EXYNOS_PMU)     += exynos-pmu.o exynos3250-pmu.o exynos4-pmu.o \
> > +                                     exynos5250-pmu.o exynos5420-pmu.o
> > +endif
>
> Why ifdef CONFIG_ARM? This already depends on ARCH_EXYNOS. If you want
> to limit to ARMv7 then add the dependency to Kconfig (just like
> EXYNOS_SROM).
>

This is required, so that 32-bit based Exynos SoC's PMU should not get
compiled when we are compiling for ARM64 and vice-versa.

For example: In future, I have plan to add exynos7 PMU support as -

ifdef CONFIG_ARM64
obj-$(CONFIG_EXYNOS_PMU) += exynos-pmu.o exynos7-pmu.o
endif

Thus preventing compilation of ARM64 based SoCs PMU data files when we
are compiling for ARM.

Only exynos-pmu.c will be shared and compiled in both cases.

Thanks,
Pankaj Dubey

>
> Rest looks ok - nice renames.
>
> Best regards,
> Krzysztof
>
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