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

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Date:   Thu, 3 Nov 2022 22:00:58 +0000
From:   Shenwei Wang <shenwei.wang@....com>
To:     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>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Aisheng Dong <aisheng.dong@....com>,
        Jacky Bai <ping.bai@....com>
CC:     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



> -----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