On Fri, Sep 21, 2018 at 12:55:09PM +0100, Fabrizio Castro wrote:
> Add SH_PFC_PIN_CFG_IO_VOLTAGE definition for the SDHI2 pins
> capable of switching voltage. Please note that with the
> RZ/G1C only 1 bit of the POC Control Register is used to
> control each interface.
> 
> Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
> Reviewed-by: Biju Das <biju.das@bp.renesas.com>

In general:

Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

> +	if (_bank == 4 && _pin >= 14 && _pin <= 19)
> +		return 1;
> +
> +	return -EINVAL;

I'd like a tad better to bail out on the error case and have the main
path returning on the good case, but no strong opinion...