Re: [PATCH v3 6/7] PM / devfreq: rockchip: add devfreq driver for rk3399 dmc

hl
2016-07-24T07:54:09Z

Hi Paul,

On 2016年07月23日 04:24, Paul Gortmaker wrote:
> On Fri, Jul 22, 2016 at 5:07 AM, Lin Huang <hl@rock-chips.com> wrote:
>> base on dfi result, we do ddr frequency scaling, register
>> dmc driver to devfreq framework, and use simple-ondemand
>> policy.
>>
>> Signed-off-by: Lin Huang <hl@rock-chips.com>
>> ---
>> Changes in v3:
>> - operate dram setting through sip call
>> - imporve set rate flow
>>
>> Changes in v2:
>> - None
>>
>> Changes in v1:
>> - move dfi controller to event
>> - fix set voltage sequence when set rate fail
>> - change Kconfig type from tristate to bool
>> - move unuse EXPORT_SYMBOL_GPL()
>>
>> drivers/devfreq/Kconfig | 1 +
>> drivers/devfreq/Makefile | 1 +
>> drivers/devfreq/rockchip/Kconfig | 15 +
>> drivers/devfreq/rockchip/Makefile | 2 +
>> drivers/devfreq/rockchip/rk3399_dmc.c | 482 ++++++++++++++++++++++++++++++++
>> drivers/devfreq/rockchip/rockchip_dmc.c | 143 ++++++++++
>> include/soc/rockchip/rockchip_dmc.h | 45 +++
>> 7 files changed, 689 insertions(+)
>> create mode 100644 drivers/devfreq/rockchip/Kconfig
>> create mode 100644 drivers/devfreq/rockchip/Makefile
>> create mode 100644 drivers/devfreq/rockchip/rk3399_dmc.c
>> create mode 100644 drivers/devfreq/rockchip/rockchip_dmc.c
>> create mode 100644 include/soc/rockchip/rockchip_dmc.h
>>
>> diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
>> index a5be56e..cb67246 100644
>> --- a/drivers/devfreq/Kconfig
>> +++ b/drivers/devfreq/Kconfig
>> @@ -101,5 +101,6 @@ config ARM_TEGRA_DEVFREQ
>> operating frequencies and voltages with OPP support.
>>
>> source "drivers/devfreq/event/Kconfig"
>> +source "drivers/devfreq/rockchip/Kconfig"
>>
>> endif # PM_DEVFREQ
>> diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile
>> index 09f11d9..48e2ae6 100644
>> --- a/drivers/devfreq/Makefile
>> +++ b/drivers/devfreq/Makefile
>> @@ -9,6 +9,7 @@ obj-$(CONFIG_DEVFREQ_GOV_PASSIVE) += governor_passive.o
>> # DEVFREQ Drivers
>> obj-$(CONFIG_ARM_EXYNOS_BUS_DEVFREQ) += exynos-bus.o
>> obj-$(CONFIG_ARM_TEGRA_DEVFREQ) += tegra-devfreq.o
>> +obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
>>
>> # DEVFREQ Event Drivers
>> obj-$(CONFIG_PM_DEVFREQ_EVENT) += event/
>> diff --git a/drivers/devfreq/rockchip/Kconfig b/drivers/devfreq/rockchip/Kconfig
>> new file mode 100644
>> index 0000000..7fb1cff
>> --- /dev/null
>> +++ b/drivers/devfreq/rockchip/Kconfig
>> @@ -0,0 +1,15 @@
>> +config ARM_ROCKCHIP_DMC_DEVFREQ
>> + bool "ARM ROCKCHIP DMC DEVFREQ Driver"
>> + depends on ARCH_ROCKCHIP
>> + help
>> + This adds the DEVFREQ driver framework for the rockchip dmc.
>> +
>> +config ARM_RK3399_DMC_DEVFREQ
>> + bool "ARM RK3399 DMC DEVFREQ Driver"
> Since you are using bool Kconfigs for your driver, please do not use
> module.h or MODULE_<xyz> tags in your driver, and use the builtin
> register function.
>
> Alternatively if there really is a use case for it to be a modular driver
> then use a tristate Kconfig.
Thanks for pointing it, will fix it next version.
> THanks,
> Paul.
> --
>
>> + depends on ARM_ROCKCHIP_DMC_DEVFREQ
>> + select PM_OPP
>> + select DEVFREQ_GOV_SIMPLE_ONDEMAND
>> + help
>> + This adds the DEVFREQ driver for the RK3399 dmc. It sets the frequency
>> + for the memory controller and reads the usage counts from hardware.
>> +
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>
>

--
Lin Huang