linux-kernel - Re: [PATCH] pinctrl: imx6ul: add IOMUXC SNVS pinctrl driver for i.MX 6ULL

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Date:   Wed, 3 Jan 2018 09:09:28 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Stefan Agner <stefan@...er.ch>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Bai Ping <ping.bai@....com>
Subject: Re: [PATCH] pinctrl: imx6ul: add IOMUXC SNVS pinctrl driver for i.MX 6ULL

On Tue, Jan 2, 2018 at 5:40 PM, Stefan Agner <stefan@...er.ch> wrote:

> From: Bai Ping <ping.bai@....com>
>
> On i.MX 6ULL, the BOOT_MODEx and TAMPERx pin MUX and CTRL registers
> are available in a separate IOMUXC_SNVS module. Add support for the
> IOMUXC_SNVS module to the i.MX 6UL pinctrl driver.
>
> Signed-off-by: Bai Ping <ping.bai@....com>
> Signed-off-by: Stefan Agner <stefan@...er.ch>

So 6 unsigned long 32 bit is succeeded by 6 unsigned long long, 64 bit?

Someone is having fun naming these platforms I see.

>  Required properties:
> -- compatible: "fsl,imx6ul-iomuxc"
> +- compatible: "fsl,imx6ul-iomuxc" for main IOMUX controller or
> +  "fsl,imx6ull-iomuxc-snvs" for i.MX 6ULL's SNVS IOMUX controller.

Pretty uncontroversial change but still nice to give the DT people a chance
to ACK it.

>  static int imx6ul_pinctrl_probe(struct platform_device *pdev)
>  {
> -       return imx_pinctrl_probe(pdev, &imx6ul_pinctrl_info);
> +       const struct of_device_id *match;
> +       struct imx_pinctrl_soc_info *pinctrl_info;
> +
> +       match = of_match_device(imx6ul_pinctrl_of_match, &pdev->dev);
> +
> +       if (!match)
> +               return -ENODEV;
> +
> +       pinctrl_info = (struct imx_pinctrl_soc_info *) match->data;

1. Do not use a cast on void * pointers.

2. Use this function:
extern const void *of_device_get_match_data(const struct device *dev);

>From <linux/of_device.h>

Yours,
Linus Walleij