Re: [PATCH v2 4/6] gpio: dwapb: Use optional-clocks interface for APB ref-clock

[Andy Shevchenko]

On Mon, Mar 23, 2020 at 09:06:30PM +0300, Sergey.Semin@xxxxxxxxxxxxxxxxxxxx wrote:
> From: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx>
> 
> The common clocks kernel framework provides a generic way to use
> an optional reference clock sources. If it's utilized there is no
> need in checking whether the clock descriptor pointer is actually a
> negative error at the moment of the prepare/unprepare clocks method
> calling. So if the corresponding clock source is provided, then
> getting an error shall actually terminate the device probe procedure.
> If it isn't specified then the driver shall proceed with further
> initializations.
> 
> We'll use the optional clocks getting method to handle the APB reference
> clock, which can be provided for instance in the device of-node with
> "bus" clock-name.

> -	if (!IS_ERR(gpio->clk))
> -		clk_prepare_enable(gpio->clk);
> +	clk_prepare_enable(gpio->clk);

Perhaps it makes sense now to consider error code returned by above.
Maybe it's material for a separate patch (up to you).

The rest looks good.

-- 
With Best Regards,
Andy Shevchenko