linux-kernel - Re: [PATCH] w1-gpio: Add GPIO w1 bus master driver

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Date:	Fri, 21 Dec 2007 13:41:28 +0300
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Ville Syrjala <syrjala@....fi>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] w1-gpio: Add GPIO w1 bus master driver

Hi Ville.

On Fri, Dec 21, 2007 at 09:34:01AM +0200, Ville Syrjala (syrjala@....fi) wrote:
> Add a GPIO 1-wire bus master driver. The driver used the GPIO API to
> control the wire and the GPIO pin can be specified using platform data
> similar to i2c-gpio. The driver was tested with AT91SAM9260 + DS2401.

This looks ok, only a minor nit about codying style below.

> Signed-off-by: Ville Syrjala <syrjala@....fi>

ACK.

> +static int __init w1_gpio_probe(struct platform_device *pdev)
> +{
> +	struct w1_bus_master *master;
> +	struct w1_gpio_platform_data *pdata;
> +	int err;
> +
> +	pdata = pdev->dev.platform_data;
> +	if (!pdata)
> +		return -ENXIO;
> +
> +	master = kzalloc(sizeof *master, GFP_KERNEL);
> +	if (!master)
> +		return -ENOMEM;

I think sizeof(struct w1_bus_master) is a better way.

> new file mode 100644
> index 0000000..3b80bb2
> --- /dev/null
> +++ b/include/linux/w1-gpio.h

Does anyone use this file except driver itself?

-- 
	Evgeniy Polyakov
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