[PATCH 1/3] i2c: uniphier: add UniPhier FIFO-less I2C driver

[Wolfram Sang]

On Thu, Jul 30, 2015 at 05:12:20PM +0900, Masahiro Yamada wrote:
> Add support for on-chip I2C controller used on old UniPhier SoCs
> such as PH1-LD4, PH1-sLD8, etc..  This adapter is so simple that
> it has no FIFO in it.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>

Finally! Mostly looking good.

> +static u32 uniphier_i2c_functionality(struct i2c_adapter *adap)
> +{
> +	return I2C_FUNC_I2C;
> +}

No I2C_FUNC_SMBUS_EMUL? But check if SMBUS_QUICK is supported by your
adapter.

> +	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!regs) {
> +		dev_err(dev, "failed to get memory resource");
> +		return -EINVAL;
> +	}

This 'if'-block can go. devm_ioremap_resource will check it for you.

Thanks,

   Wolfram

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