linux-kernel - Re: [PATCHv2 7/7] basic_mmio_gpio: support direction registers

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Date:	Fri, 8 Apr 2011 18:38:22 +0400
From:	Anton Vorontsov <cbouatmailru@...il.com>
To:	Jamie Iles <jamie@...ieiles.com>
Cc:	linux-kernel@...r.kernel.org, linux@....linux.org.uk,
	tglx@...utronix.de, grant.likely@...retlab.ca, arnd@...db.de,
	nico@...xnic.net
Subject: Re: [PATCHv2 7/7] basic_mmio_gpio: support direction registers

On Fri, Apr 08, 2011 at 03:16:51PM +0100, Jamie Iles wrote:
[...]
>  static int bgpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
>  {
> +	struct bgpio_chip *bgc = to_bgpio_chip(gc);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&bgc->lock, flags);

For readability, I would still add an empty line here.

> +	bgc->dir &= ~bgc->pin2mask(bgc, gpio);
> +	bgc->write_reg(bgc->reg_dir, bgc->dir);

And here.

> +	spin_unlock_irqrestore(&bgc->lock, flags);
> +
>  	return 0;
>  }
>  
>  static int bgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
>  {
> +	struct bgpio_chip *bgc = to_bgpio_chip(gc);
> +	unsigned long flags;
> +
> +	gc->set(gc, gpio, val);
> +
> +	spin_lock_irqsave(&bgc->lock, flags);

Ditto.

> +	bgc->dir |= bgc->pin2mask(bgc, gpio);
> +	bgc->write_reg(bgc->reg_dir, bgc->dir);

Ditto.

> +	spin_unlock_irqrestore(&bgc->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int bgpio_dir_in_inv(struct gpio_chip *gc, unsigned int gpio)
> +{
> +	struct bgpio_chip *bgc = to_bgpio_chip(gc);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&bgc->lock, flags);

etc...

Thanks,

-- 
Anton Vorontsov
Email: cbouatmailru@...il.com
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