linux-kernel - Re: [PATCH v2 02/10] pinctrl: axp209: add pinctrl features

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20170926130009.r5isgrjvkwmm44nn@flea>
Date:   Tue, 26 Sep 2017 15:00:09 +0200
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Quentin Schulz <quentin.schulz@...e-electrons.com>
Cc:     linus.walleij@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        wens@...e.org, linux@...linux.org.uk, lee.jones@...aro.org,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...glegroups.com, thomas.petazzoni@...e-electrons.com
Subject: Re: [PATCH v2 02/10] pinctrl: axp209: add pinctrl features

On Tue, Sep 26, 2017 at 12:17:12PM +0000, Quentin Schulz wrote:
> +static const struct axp20x_desc_pin axp209_pins[] = {
> +	AXP20X_PIN(AXP20X_PINCTRL_PIN(0, "GPIO0"),
> +		   AXP20X_FUNCTION(0x0, "gpio_out"),
> +		   AXP20X_FUNCTION(0x2, "gpio_in"),
> +		   AXP20X_FUNCTION(0x3, "ldo"),
> +		   AXP20X_FUNCTION(0x4, "adc")),
> +	AXP20X_PIN(AXP20X_PINCTRL_PIN(1, "GPIO1"),
> +		   AXP20X_FUNCTION(0x0, "gpio_out"),
> +		   AXP20X_FUNCTION(0x2, "gpio_in"),
> +		   AXP20X_FUNCTION(0x3, "ldo"),
> +		   AXP20X_FUNCTION(0x4, "adc")),
> +	AXP20X_PIN(AXP20X_PINCTRL_PIN(2, "GPIO2"),
> +		   AXP20X_FUNCTION(0x0, "gpio_out"),
> +		   AXP20X_FUNCTION(0x2, "gpio_in")),
> +};

If all the functions are the same, and at the same offset, can't we
just hardcode it, instead of having (and duplicate) all the logic
below?

> +	pctrl_desc = devm_kzalloc(&pdev->dev, sizeof(*pctrl_desc), GFP_KERNEL);
> +	if (!pctrl_desc)
> +		return -ENOMEM;
> +
> +	pctrl_desc->name = dev_name(&pdev->dev);
> +	pctrl_desc->owner = THIS_MODULE;
> +	pctrl_desc->pins = pins;
> +	pctrl_desc->npins = gpio->desc->npins;
> +	pctrl_desc->pctlops = &axp20x_pctrl_ops;
> +	pctrl_desc->pmxops = &axp20x_pmx_ops;

The strict flag needs to be set too in order to avoid concurrent uses
of GPIO and other functions.

Maxime

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

Download attachment "signature.asc" of type "application/pgp-signature" (802 bytes)