linux-kernel - Re: [PATCH v4] regulator: new drivers for AD5398 and AD5821

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Message-ID: <20100603170254.GG2762@rakim.wolfsonmicro.main>
Date:	Thu, 3 Jun 2010 18:02:54 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	sonic zhang <sonic.adi@...il.com>
Cc:	Liam Girdwood <lrg@...mlogic.co.uk>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	uclinux-dist-devel <uclinux-dist-devel@...ckfin.uclinux.org>
Subject: Re: [PATCH v4] regulator: new drivers for AD5398 and AD5821

On Thu, Jun 03, 2010 at 11:27:20AM +0800, sonic zhang wrote:

> The AD5398 and AD5821 are single 10-bit DAC with 120 mA output current
> sink capability. They feature an internal reference and operates from
> a single 2.7 V to 5.5 V supply.

> This driver supports both the AD5398 and the AD5821.  It adapts into the
> voltage and current framework.

Looks good, just a few fairly small things.

> +	if (chip->min_uA < init_data->constraints.min_uA)
> +		chip->user_min_uA = init_data->constraints.min_uA;
> +	else
> +		chip->user_min_uA = chip->min_uA;
> +	if (chip->max_uA > init_data->constraints.max_uA)
> +		chip->user_max_uA = init_data->constraints.max_uA;
> +	else
> +		chip->user_max_uA = chip->max_uA;

Your driver should not be worrying about the constraints, the regulator
core will take care of enforcing them.

> +MODULE_DESCRIPTION("AD5398 and AD5821 current regulator driver");
> +MODULE_AUTHOR("Sonic Zhang");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:ad5398-regulator");

This is an I2C device, not a platform device.
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