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From:   Bartosz Golaszewski <bgolaszewski@baylibre.com>
Date:   Fri, 23 Jul 2021 09:30:56 +0200
Message-ID: <CAMpxmJU4jN-hpNYPLHLbjx4uZ6vDqcyuMVQXhHg1BWXOqyS22A@mail.gmail.com>
Subject: Re: [PATCH v6 0/9] ASPEED sgpio driver enhancement.
To:     Steven Lee <steven_lee@aspeedtech.com>,
        Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>
Cc:     Linus Walleij <linus.walleij@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        "moderated list:ARM/ASPEED MACHINE SUPPORT" 
        <linux-arm-kernel@lists.infradead.org>,
        "moderated list:ARM/ASPEED MACHINE SUPPORT" 
        <linux-aspeed@lists.ozlabs.org>,
        open list <linux-kernel@vger.kernel.org>,
        Hongwei Zhang <Hongweiz@ami.com>,
        Ryan Chen <ryan_chen@aspeedtech.com>,
        Billy Tsai <billy_tsai@aspeedtech.com>
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On Fri, Jul 23, 2021 at 5:16 AM Steven Lee <steven_lee@aspeedtech.com> wrote:
>
> The 07/21/2021 21:27, Bartosz Golaszewski wrote:
> > On Mon, Jul 12, 2021 at 12:03 PM Steven Lee <steven_lee@aspeedtech.com> wrote:
> > >
> > > AST2600 SoC has 2 SGPIO master interfaces one with 128 pins another one
> > > with 80 pins, AST2500/AST2400 SoC has 1 SGPIO master interface that
> > > supports up to 80 pins.
> > > In the current driver design, the max number of sgpio pins is hardcoded
> > > in macro MAX_NR_HW_SGPIO and the value is 80.
> > >
> > > For supporting sgpio master interfaces of AST2600 SoC, the patch series
> > > contains the following enhancement:
> > > - Convert txt dt-bindings to yaml.
> > > - Update aspeed-g6 dtsi to support the enhanced sgpio.
> > > - Support muiltiple SGPIO master interfaces.
> > > - Support up to 128 pins by dts ngpios property.
> > > - Pair input/output GPIOs instead of using 0 as GPIO input pin base and
> > >   MAX_NR_HW_SGPIO as GPIO output pin base.
> > > - Support wdt reset tolerance.
> > > - Fix irq_chip issues which causes multiple sgpio devices use the same
> > >   irq_chip data.
> > > - Replace all of_*() APIs with device_*().
> > >
> > > Changes from v5:
> > > * Squash v5 patch-05 and patch-06 to one patch.
> > > * Remove MAX_NR_HW_SGPIO and corresponding design to make the gpio
> > >   input/output pin base are determined by ngpios.
> > >   For example, if MAX_NR_HW_SGPIO is 80 and ngpios is 10, the original
> > >   pin order is as follows:
> > >     Input:
> > >     0 1 2 3 ... 9
> > >     Output:
> > >     80 81 82 ... 89
> > >
> > >   With the new design, pin order is changed as follows:
> > >     Input:
> > >     0 2 4 6 ... 18(ngpios * 2 - 2)
> > >     Output:
> > >     1 3 5 7 ... 19(ngpios * 2 - 1)
> > > * Replace ast2600-sgpiom-128 and ast2600-sgpiom-80 compatibles by
> > >   ast2600-sgpiom.
> > > * Fix coding style issues.
> > >
> > > Changes from v4:
> > > * Remove ngpios from dtsi
> > > * Add ast2400 and ast2500 platform data.
> > > * Remove unused macros.
> > > * Add ngpios check in a separate patch.
> > > * Fix coding style issues.
> > >
> > > Changes from v3:
> > > * Split dt-bindings patch to 2 patches
> > > * Rename ast2600-sgpiom1 compatible with ast2600-sgiom-128
> > > * Rename ast2600-sgpiom2 compatible with ast2600-sgiom-80
> > > * Correct the typo in commit messages.
> > > * Fix coding style issues.
> > > * Replace all of_*() APIs with device_*().
> > >
> > > Changes from v2:
> > > * Remove maximum/minimum of ngpios from bindings.
> > > * Remove max-ngpios from bindings and dtsi.
> > > * Remove ast2400-sgpiom and ast2500-sgpiom compatibles from dts and
> > >   driver.
> > > * Add ast2600-sgpiom1 and ast2600-sgpiom2 compatibles as their max
> > >   number of available gpio pins are different.
> > > * Modify functions to pass aspeed_sgpio struct instead of passing
> > >   max_ngpios.
> > > * Split sgpio driver patch to 3 patches
> > >
> > > Changes from v1:
> > > * Fix yaml format issues.
> > > * Fix issues reported by kernel test robot.
> > >
> > > Please help to review.
> > >
> > > Thanks,
> > > Steven
> > >
> > > Steven Lee (9):
> > >   dt-bindings: aspeed-sgpio: Convert txt bindings to yaml.
> > >   dt-bindings: aspeed-sgpio: Add ast2600 sgpio
> > >   ARM: dts: aspeed-g6: Add SGPIO node.
> > >   ARM: dts: aspeed-g5: Remove ngpios from sgpio node.
> > >   gpio: gpio-aspeed-sgpio: Add AST2600 sgpio support
> > >   gpio: gpio-aspeed-sgpio: Add set_config function
> > >   gpio: gpio-aspeed-sgpio: Move irq_chip to aspeed-sgpio struct
> > >   gpio: gpio-aspeed-sgpio: Use generic device property APIs
> > >   gpio: gpio-aspeed-sgpio: Return error if ngpios is not multiple of 8.
> > >
> > >  .../bindings/gpio/aspeed,sgpio.yaml           |  77 ++++++++
> > >  .../devicetree/bindings/gpio/sgpio-aspeed.txt |  46 -----
> > >  arch/arm/boot/dts/aspeed-g5.dtsi              |   1 -
> > >  arch/arm/boot/dts/aspeed-g6.dtsi              |  28 +++
> > >  drivers/gpio/gpio-aspeed-sgpio.c              | 178 +++++++++++-------
> > >  5 files changed, 215 insertions(+), 115 deletions(-)
> > >  create mode 100644 Documentation/devicetree/bindings/gpio/aspeed,sgpio.yaml
> > >  delete mode 100644 Documentation/devicetree/bindings/gpio/sgpio-aspeed.txt
> > >
> > > --
> > > 2.17.1
> > >
> >
> > The series looks good to me. Can the DTS and GPIO patches go into
> > v5.15 separately?
> >
>
> Hi Bart,
>
> Thanks for the review.
> Shall we do anything to make the patches go into v5.15 or wait for picking-up?
>
> Steven
>
> > Bart

It's more of a question to the relevant SoC maintainers.

Joel, Andrew: can I take the GPIO patches through the GPIO tree and
you'll take the ARM patches separately into v5.15?

Bartosz