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

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Date:   Sat, 06 Jan 2018 12:14:28 +0100
From:   Stefan Agner <stefan@...er.ch>
To:     Linus Walleij <linus.walleij@...aro.org>
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,
        Bai Ping <ping.bai@....com>
Subject: Re: [PATCH] pinctrl: imx6ul: add IOMUXC SNVS pinctrl driver for i.MX
 6ULL

On 2018-01-03 09:09, Linus Walleij wrote:
> 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.

Hehe, yeah definitely. At least they use proper type suffixes ;-)

> 
>>  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>

Ok. We use the same code in pinmux-imx7d.c, will send a patch to
simplify that too.

--
Stefan