Re: [PATCH v2 1/5] mfd: Add S5M core driver

[Mark Brown <broonie@opensource.wolfsonmicro.com>]

On Fri, Dec 23, 2011 at 05:28:08PM +0900, Sangbeom Kim wrote:
> S5M series are pmic including mutiple functional devices.
> It can support PMIC, RTC, Battery charger, codec.
> This patch implement core driver for s5m series.

Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Looking good - a few nits that could be fixed incrementally unless
there's some reason to resend.

> +static struct regmap_config s5m_regmap_config = {
> +	.reg_bits = 8,
> +	.val_bits = 8,
> +};

It would be worth considering turning on the register cache support - it
can provide a nice performance win for read/modify/write operations by
cutting out the read from hardware.  You don't need to provide any
defaults.

> +	s5m87xx = kzalloc(sizeof(struct s5m87xx_dev), GFP_KERNEL);
> +	if (s5m87xx == NULL)
> +		return -ENOMEM;

devm_kzalloc() saves error handling and cleanup code.