linux-kernel - Re: [PATCH v3 3/3] gpio: pxa: request pinmux function for gpio

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Message-ID: <CACRpkda_0ECowDhg2wWx9wLHgVVcRKycLYR=AgNrHVBum2ibLw@mail.gmail.com>
Date:	Sun, 1 Jan 2012 15:22:07 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Haojian Zhuang <haojian.zhuang@...vell.com>
Cc:	swarren@...dia.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, eric.y.miao@...il.com,
	linux@....linux.org.uk, arnd@...db.de
Subject: Re: [PATCH v3 3/3] gpio: pxa: request pinmux function for gpio

On Thu, Dec 22, 2011 at 9:17 AM, Haojian Zhuang
<haojian.zhuang@...vell.com> wrote:

> While gpio is requested for pxa, gpio driver will request function ready
> on pin.
(...)

> +#ifdef CONFIG_PINMUX
> +static int pxa_gpio_request(struct gpio_chip *chip, unsigned offset)
> +{
> +       return pinmux_request_gpio(chip->base + offset);
> +}
> +
> +static void pxa_gpio_free(struct gpio_chip *chip, unsigned offset)
> +{
> +       pinmux_free_gpio(chip->base + offset);
> +}
> +#else
> +static int pxa_gpio_request(struct gpio_chip *chip, unsigned offset) {return 0;}
> +static void pxa_gpio_free(struct gpio_chip *chip, unsigned offset) {}
> +#endif
> +

Skip the #ifdef, the pinmux portion of pinctrl already provides stubs if
CONFIG_PINMUX is not selected. See <linux/pinctrl/pinmux.h>

Yours,
Linus Walleij
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