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Message-ID: <CAMhs-H_SryQqCZ3mB_VsO20ZSvKCMR5V9E7wrt+a-kbcqQxsWQ@mail.gmail.com>
Date: Mon, 6 Mar 2023 15:07:31 +0100
From: Sergio Paracuellos <sergio.paracuellos@...il.com>
To: Arınç ÜNAL <arinc.unal@...nc9.com>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
linux-mediatek@...ts.infradead.org, linux-mips@...r.kernel.org,
linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
Matthias Brugger <matthias.bgg@...il.com>,
Sean Wang <sean.wang@...nel.org>,
William Dean <williamsukatube@...il.com>,
Daniel Golle <daniel@...rotopia.org>,
Daniel Santos <daniel.santos@...ox.com>,
Luiz Angelo Daros de Luca <luizluca@...il.com>,
Frank Wunderlich <frank-w@...lic-files.de>,
Landen Chao <Landen.Chao@...iatek.com>,
DENG Qingfang <dqfext@...il.com>,
Sean Wang <sean.wang@...iatek.com>, erkin.bozoglu@...ont.com
Subject: Re: [PATCH 05/20] pinctrl: ralink: move to mediatek as mtmips
On Fri, Mar 3, 2023 at 3:18 PM Arınç ÜNAL <arinc.unal@...nc9.com> wrote:
>
> Heyo,
>
> On 3.03.2023 13:57, Sergio Paracuellos wrote:
> > Hi Arınç,
> >
> > On Fri, Mar 3, 2023 at 9:16 AM Arınç ÜNAL <arinc.unal@...nc9.com> wrote:
> >>
> >> Hey Sergio,
> >>
> >> On 3.03.2023 09:34, Sergio Paracuellos wrote:
> >>> On Fri, Mar 3, 2023 at 7:17 AM Sergio Paracuellos
> >>> <sergio.paracuellos@...il.com> wrote:
> >>>>
> >>>> Hi Arınç,
> >>>>
> >>>> On Fri, Mar 3, 2023 at 1:30 AM <arinc9.unal@...il.com> wrote:
> >>>>>
> >>>>> From: Arınç ÜNAL <arinc.unal@...nc9.com>
> >>>>>
> >>>>> This platform from Ralink was acquired by MediaTek in 2011. Then, MediaTek
> >>>>> introduced new SoCs which utilise this platform. Move the driver to
> >>>>> mediatek pinctrl directory. Rename the ralink core driver to mtmips.
> >>>>>
> >>>>> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>
> >>>>> ---
> >>>>> drivers/pinctrl/Kconfig | 1 -
> >>>>> drivers/pinctrl/Makefile | 1 -
> >>>>> drivers/pinctrl/mediatek/Kconfig | 51 ++++++++++-
> >>>>> drivers/pinctrl/mediatek/Makefile | 63 +++++++------
> >>>>> .../{ralink => mediatek}/pinctrl-mt7620.c | 34 +++----
> >>>>> .../{ralink => mediatek}/pinctrl-mt7621.c | 30 +++----
> >>>>> .../{ralink => mediatek}/pinctrl-mt76x8.c | 60 ++++++-------
> >>>>> .../pinctrl-mtmips.c} | 90 +++++++++----------
> >>>>> .../pinctrl-mtmips.h} | 16 ++--
> >>>>> .../{ralink => mediatek}/pinctrl-rt2880.c | 20 ++---
> >>>>> .../{ralink => mediatek}/pinctrl-rt305x.c | 44 ++++-----
> >>>>> .../{ralink => mediatek}/pinctrl-rt3883.c | 28 +++---
> >>>>> drivers/pinctrl/ralink/Kconfig | 40 ---------
> >>>>> drivers/pinctrl/ralink/Makefile | 9 --
> >>>>> 14 files changed, 246 insertions(+), 241 deletions(-)
> >>>>> rename drivers/pinctrl/{ralink => mediatek}/pinctrl-mt7620.c (81%)
> >>>>> rename drivers/pinctrl/{ralink => mediatek}/pinctrl-mt7621.c (80%)
> >>>>> rename drivers/pinctrl/{ralink => mediatek}/pinctrl-mt76x8.c (81%)
> >>>>> rename drivers/pinctrl/{ralink/pinctrl-ralink.c => mediatek/pinctrl-mtmips.c} (74%)
> >>>>> rename drivers/pinctrl/{ralink/pinctrl-ralink.h => mediatek/pinctrl-mtmips.h} (75%)
> >>>>> rename drivers/pinctrl/{ralink => mediatek}/pinctrl-rt2880.c (71%)
> >>>>> rename drivers/pinctrl/{ralink => mediatek}/pinctrl-rt305x.c (75%)
> >>>>> rename drivers/pinctrl/{ralink => mediatek}/pinctrl-rt3883.c (80%)
> >>>>> delete mode 100644 drivers/pinctrl/ralink/Kconfig
> >>>>> delete mode 100644 drivers/pinctrl/ralink/Makefile
> >>>>>
> >>>>> diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
> >>>>> index dcb53c4a9584..8a6012770640 100644
> >>>>> --- a/drivers/pinctrl/Kconfig
> >>>>> +++ b/drivers/pinctrl/Kconfig
> >>>>> @@ -537,7 +537,6 @@ source "drivers/pinctrl/nomadik/Kconfig"
> >>>>> source "drivers/pinctrl/nuvoton/Kconfig"
> >>>>> source "drivers/pinctrl/pxa/Kconfig"
> >>>>> source "drivers/pinctrl/qcom/Kconfig"
> >>>>> -source "drivers/pinctrl/ralink/Kconfig"
> >>>>> source "drivers/pinctrl/renesas/Kconfig"
> >>>>> source "drivers/pinctrl/samsung/Kconfig"
> >>>>> source "drivers/pinctrl/spear/Kconfig"
> >>>>> diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
> >>>>> index d5939840bb2a..ada6ed1d4e91 100644
> >>>>> --- a/drivers/pinctrl/Makefile
> >>>>> +++ b/drivers/pinctrl/Makefile
> >>>>> @@ -66,7 +66,6 @@ obj-y += nomadik/
> >>>>> obj-y += nuvoton/
> >>>>> obj-$(CONFIG_PINCTRL_PXA) += pxa/
> >>>>> obj-$(CONFIG_ARCH_QCOM) += qcom/
> >>>>> -obj-$(CONFIG_PINCTRL_RALINK) += ralink/
> >>>>> obj-$(CONFIG_PINCTRL_RENESAS) += renesas/
> >>>>> obj-$(CONFIG_PINCTRL_SAMSUNG) += samsung/
> >>>>> obj-$(CONFIG_PINCTRL_SPEAR) += spear/
> >>>>> diff --git a/drivers/pinctrl/mediatek/Kconfig b/drivers/pinctrl/mediatek/Kconfig
> >>>>> index a71874fed3d6..2eeb55010563 100644
> >>>>> --- a/drivers/pinctrl/mediatek/Kconfig
> >>>>> +++ b/drivers/pinctrl/mediatek/Kconfig
> >>>>> @@ -1,6 +1,6 @@
> >>>>> # SPDX-License-Identifier: GPL-2.0-only
> >>>>> menu "MediaTek pinctrl drivers"
> >>>>> - depends on ARCH_MEDIATEK || COMPILE_TEST
> >>>>> + depends on ARCH_MEDIATEK || RALINK || COMPILE_TEST
> >>>>>
> >>>>> config EINT_MTK
> >>>>> tristate "MediaTek External Interrupt Support"
> >>>>> @@ -22,6 +22,12 @@ config PINCTRL_MTK
> >>>>> config PINCTRL_MTK_V2
> >>>>> tristate
> >>>>>
> >>>>> +config PINCTRL_MTK_MTMIPS
> >>>>> + bool
> >>>>> + depends on RALINK
> >>>>> + select PINMUX
> >>>>> + select GENERIC_PINCONF
> >>>>> +
> >>>>> config PINCTRL_MTK_MOORE
> >>>>> bool
> >>>>> depends on OF
> >>>>> @@ -43,6 +49,49 @@ config PINCTRL_MTK_PARIS
> >>>>> select OF_GPIO
> >>>>> select PINCTRL_MTK_V2
> >>>>>
> >>>>> +# For MIPS SoCs
> >>>>> +config PINCTRL_MT7620
> >>>>> + bool "MediaTek MT7620 pin control"
> >>>>> + depends on SOC_MT7620 || COMPILE_TEST
> >>>>> + depends on RALINK
> >>>>> + default SOC_MT7620
> >>>>> + select PINCTRL_MTK_MTMIPS
> >>>>> +
> >>>>> +config PINCTRL_MT7621
> >>>>> + bool "MediaTek MT7621 pin control"
> >>>>> + depends on SOC_MT7621 || COMPILE_TEST
> >>>>> + depends on RALINK
> >>>>> + default SOC_MT7621
> >>>>> + select PINCTRL_MTK_MTMIPS
> >>>>> +
> >>>>> +config PINCTRL_MT76X8
> >>>>> + bool "MediaTek MT76X8 pin control"
> >>>>> + depends on SOC_MT7620 || COMPILE_TEST
> >>>>> + depends on RALINK
> >>>>> + default SOC_MT7620
> >>>>> + select PINCTRL_MTK_MTMIPS
> >>>>> +
> >>>>> +config PINCTRL_RT2880
> >>>>> + bool "Ralink RT2880 pin control"
> >>>>> + depends on SOC_RT288X || COMPILE_TEST
> >>>>> + depends on RALINK
> >>>>> + default SOC_RT288X
> >>>>> + select PINCTRL_MTK_MTMIPS
> >>>>> +
> >>>>> +config PINCTRL_RT305X
> >>>>> + bool "Ralink RT305X pin control"
> >>>>> + depends on SOC_RT305X || COMPILE_TEST
> >>>>> + depends on RALINK
> >>>>> + default SOC_RT305X
> >>>>> + select PINCTRL_MTK_MTMIPS
> >>>>> +
> >>>>> +config PINCTRL_RT3883
> >>>>> + bool "Ralink RT3883 pin control"
> >>>>> + depends on SOC_RT3883 || COMPILE_TEST
> >>>>> + depends on RALINK
> >>>>> + default SOC_RT3883
> >>>>> + select PINCTRL_MTK_MTMIPS
> >>>>> +
> >>>>
> >>>> I am not a Kconfig expert at all but...
> >>>>
> >>>> Should not all of these be depends on SOC_XXX || (COMPILE_TEST &&
> >>>> RALINK) and avoid the " depends on RALINK" next line in all of them?
> >>
> >> This seems to do the same thing but I'm following the "either change
> >> them all or fit into the crowd" ideology.
> >>
> >>>>
> >>>> Just asking since we have yet arch read and write register operations
> >>>> in pinctrl common ralink code. Having in this way, when we address
> >>>> this arch thing in the next series just removing the "&& RALINK" part
> >>>> makes the review pretty obvious.
> >>
> >> You'd have to change RALINK with OF since we're still depending on that.
> >> RALINK selects OF by default so it's currently a hidden dependency.
> >>
> >>>>
> >>>> Other than that, changes look good to me.
> >>>
> >>> I think "depends on SOC_XXX || (COMPILE_TEST && MIPS)" would work also
> >>> and might be more accurate for compile testing targets.
> >
> > Are you sure? SOC_XXX here is already being enabled only if RALINK is
> > already enabled, right? [0]
>
> I'm not sure who's your reply to, or what it's about here.
Bad insertion between lines, sorry :). I was just trying to explain to
you that SOC_RTXX ralink stuff is only available when RALINK is
already selected.
>
> >
> >>
> >> This is not OK in both cases. If the driver is dependent on Ralink
> >> architecture code, choosing any other MIPS platform will make the driver
> >> available to compile, which will fail.
> >
> > SOC_XXX is already dependent on RALINK for real uses but the driver is
> > going to be selected for other MIPS platforms only for COMPILE_TEST
> > targets. Ideally drivers should be arch agnostic so can be selected
> > for any single arch build. Now we have arch dependent read and write
> > calls in the code, so you need the right headers to be properly found
> > to be able to compile testing. I think MIPS is enough dependency here
> > to properly find them. But if not, this should be (COMPILE_TEST &&
> > RALINK)
>
> I expect below to work without requiring the MIPS option.
>
> ifeq ($(CONFIG_COMPILE_TEST),y)
> CFLAGS_pinctrl-mtmips.o += -I$(srctree)/arch/mips/include
> endif
Yes, this will work but won't be necessary at all when we get rid of
ralink arch dependent code in the next series.
>
> >
> >>
> >> If the driver is independent of Ralink architecture code, you're
> >> limiting the driver to be compiled only when a MIPS platform is selected.
> >
> > So... how are you planning to allow compile testing of the driver in
> > any single arch when we get rid of all the arch dependent code? If you
> > make everything dependent on RALINK you cannot.
>
> I intend to make it dependent on OF, not RALINK.
Ok, I see, thanks for clarification.
>
> Arınç
Best regards,
Sergio Paracuellos
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