linux-kernel - Re: [PATCH v4 0/5] gpio: add suspend/resume support for i.mx8x SoCs

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Message-ID: <CAMRc=McPXjixgSJNDfFLRzR=OM2Q9SuAuCumqEpjb_s2fdYa-w@mail.gmail.com>
Date:   Mon, 7 Nov 2022 11:29:35 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Shenwei Wang <shenwei.wang@....com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Aisheng Dong <aisheng.dong@....com>,
        Jacky Bai <ping.bai@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        dl-linux-imx <linux-imx@....com>, Peng Fan <peng.fan@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "imx@...ts.linux.dev" <imx@...ts.linux.dev>
Subject: Re: [PATCH v4 0/5] gpio: add suspend/resume support for i.mx8x SoCs

On Thu, Nov 3, 2022 at 11:01 PM Shenwei Wang <shenwei.wang@....com> wrote:
>
>
>
> > -----Original Message-----
> > Subject: [PATCH v4 0/5] gpio: add suspend/resume support for i.mx8x SoCs
> >
> > On i.MX8QM/QXP/DXL SoCs, even a GPIO is selected as the wakeup source, the
> > GPIO block will be powered off when system enters into suspend state. This can
> > greatly reduce the power consumption of suspend state because the whole
> > partition can be shutdown. This is called PAD wakeup feature on i.MX8x
> > platform.
> >
> > This series of patches enable this wakeup feature on i.MX8QM/QXP/DXL
> > platforms.
> >
> > Changes in v4:
> >  - fixed the format issues reported by Peng Fan.
> >  - change the return type of mxc_gpio_generic_config, and limit the
> >    suspend/resume behavior changes only on i.MX8QM/QXP/DXL platform.
> >
>
> A soft ping. 😊
>
> Regards,
> Shenwei
>
> > Changes in v3:
> >  - According to the feedback from Linus Walleij, the wakeup feature is
> >    moved to pinctrl driver, and the array of gpio-pin mapping is moved
> >    to gpio device node and initialized via gpio-ranges property.
> >
> > Shenwei Wang (5):
> >   arm64: dts: imx8dxl-ss-lsio: add gpio-ranges property
> >   arm64: dts: imx8qm-ss-lsio: add gpio-ranges property
> >   arm64: dts: imx8qxp-ss-lsio: add gpio-ranges property
> >   pinctrl: freescale: add pad wakeup config
> >   gpio: mxc: enable pad wakeup on i.MX8x platforms
> >
> >  .../boot/dts/freescale/imx8dxl-ss-lsio.dtsi   | 41 +++++++++
> >  .../boot/dts/freescale/imx8qm-ss-lsio.dtsi    | 38 ++++++++
> >  .../boot/dts/freescale/imx8qxp-ss-lsio.dtsi   | 25 +++++
> >  drivers/gpio/gpio-mxc.c                       | 92 ++++++++++++++++++-
> >  drivers/pinctrl/freescale/pinctrl-scu.c       | 30 ++++++
> >  5 files changed, 225 insertions(+), 1 deletion(-)
> >
> > --
> > 2.34.1
>

GPIO part looks good to me.

Acked-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>