linux-kernel - Re: [PATCH v2 03/10] pinctrl: sunxi: add A20 support to A10 driver

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Message-ID: <20170504140220.26kguf3trz7ocylv@lukather>
Date:   Thu, 4 May 2017 16:02:20 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-doc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v2 03/10] pinctrl: sunxi: add A20 support to A10 driver

On Thu, May 04, 2017 at 09:49:59PM +0800, Icenowy Zheng wrote:
>  static const struct of_device_id sun4i_a10_pinctrl_match[] = {
> -	{ .compatible = "allwinner,sun4i-a10-pinctrl", },
> +	{
> +		.compatible = "allwinner,sun4i-a10-pinctrl",
> +		.data = (void *)PINCTRL_SUN4I_A10
> +	},
> +	{
> +		.compatible = "allwinner,sun7i-a20-pinctrl",
> +		.data = (void *)PINCTRL_SUN7I_A20
> +	},
>  	{}
>  };

This means you're going to have two drivers probing for the same
device: this driver, and the old one. This is not ok, and probably
introduces some corner cases.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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