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SubjectRe: [PATCH v3 1/3] cpufreq: mediatek: Add support of cpufreq to MT2701/MT7623 SoC
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On Fri, 2017-07-07 at 09:30 +0200, Jean Delvare wrote:
> Hi Sean,
>
> On ven., 2017-07-07 at 11:56 +0800, sean.wang@mediatek.com wrote:
> > From: Sean Wang <sean.wang@mediatek.com>
> >
> > MT2701/MT7623 is a 32-bit ARMv7 based quad-core (4 * Cortex-A7) with
> > single cluster and this hardware is also compatible with the existing
> > driver through enabling CPU frequency feature with operating-points-v2
> > bindings. Also, this driver actually supports all MediaTek SoCs, the
> > Kconfig menu entry and file name itself should be updated with more
> > generic name to drop "MT8173"
> >
> > Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> > Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
> > ---
> > drivers/cpufreq/Kconfig.arm | 8 ++++----
> > drivers/cpufreq/Makefile | 2 +-
> > drivers/cpufreq/{mt8173-cpufreq.c => mtk-cpufreq.c} | 2 ++
> > 3 files changed, 7 insertions(+), 5 deletions(-)
> > rename drivers/cpufreq/{mt8173-cpufreq.c => mtk-cpufreq.c} (99%)
> >
> > diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
> > index 74ed7e9..79aece7 100644
> > --- a/drivers/cpufreq/Kconfig.arm
> > +++ b/drivers/cpufreq/Kconfig.arm
> > @@ -87,14 +87,14 @@ config ARM_KIRKWOOD_CPUFREQ
> > This adds the CPUFreq driver for Marvell Kirkwood
> > SoCs.
> >
> > -config ARM_MT8173_CPUFREQ
> > - tristate "Mediatek MT8173 CPUFreq support"
> > +config ARM_MEDIATEK_CPUFREQ
> > + tristate "CPU Frequency scaling support for MediaTek SoCs"
> > depends on ARCH_MEDIATEK && REGULATOR
> > - depends on ARM64 || (ARM_CPU_TOPOLOGY && COMPILE_TEST)
> > + depends on ARM || ARM64 || COMPILE_TEST
>
> This statement no longer serves any purpose. The whole Kconfig.arm file
> depends on ARM || ARM64, so you can drop it. As a matter of fact no
> other entry in this file has the dependency.
>

Okay, the whole line seemed redundant for that's always true.
I will drop it in the next version.

> > depends on !CPU_THERMAL || THERMAL
> > select PM_OPP
> > help
> > - This adds the CPUFreq driver support for Mediatek MT8173 SoC.
> > + This adds the CPUFreq driver support for MediaTek SoCs.
> >
> > config ARM_OMAP2PLUS_CPUFREQ
> > bool "TI OMAP2+"
> > diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
> > index b7e78f0..4956f5d 100644
> > --- a/drivers/cpufreq/Makefile
> > +++ b/drivers/cpufreq/Makefile
> > @@ -58,7 +58,7 @@ obj-$(CONFIG_ARM_EXYNOS5440_CPUFREQ) += exynos5440-cpufreq.o
> > obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o
> > obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o
> > obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o
> > -obj-$(CONFIG_ARM_MT8173_CPUFREQ) += mt8173-cpufreq.o
> > +obj-$(CONFIG_ARM_MEDIATEK_CPUFREQ) += mtk-cpufreq.o
>
> I would have preferred mediatek-cpufreq. 3-letter abbreviations are
> likely to collide and cause confusion at some point in time. However it
> seems I am late to the party, I see that there are already many files
> named mtk-* or *-mtk.*... So, so be it.
>
> Also the file describing the bindings is named cpufreq-mediatek.txt,
> which is inconsistent... But the situation is the same for a few other
> cpufreq drivers already, so I suppose this is acceptable.
>

Agreed. I also prefer using whole name with mediatek as the
prefix than just abbreviation used. I will update it also in the
next version.

As for the file naming for other drivers, i feel it's okay for me
changing into mediatek as file prefix, but it still depends on
maintainers or original authors if they likes this.


Sean

> > obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o
> > obj-$(CONFIG_ARM_PXA2xx_CPUFREQ) += pxa2xx-cpufreq.o
> > obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o
> > diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mtk-cpufreq.c
> > similarity index 99%
> > rename from drivers/cpufreq/mt8173-cpufreq.c
> > rename to drivers/cpufreq/mtk-cpufreq.c
> > index fd1886f..481ec77 100644
> > --- a/drivers/cpufreq/mt8173-cpufreq.c
> > +++ b/drivers/cpufreq/mtk-cpufreq.c
> > @@ -575,6 +575,8 @@ static struct platform_driver mt8173_cpufreq_platdrv = {
> >
> > /* List of machines supported by this driver */
> > static const struct of_device_id mt8173_cpufreq_machines[] __initconst = {
> > + { .compatible = "mediatek,mt2701", },
> > + { .compatible = "mediatek,mt7623", },
> > { .compatible = "mediatek,mt817x", },
> > { .compatible = "mediatek,mt8173", },
> > { .compatible = "mediatek,mt8176", },
>
> Reviewed-by: Jean Delvare <jdelvare@suse.de>
>


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