Re: [PATCH v2 1/2] dmaengine: Introduce DW AXI DMAC driver

From: Eugeniy Paltsev
Date: Mon Mar 05 2018 - 10:56:56 EST


On Mon, 2018-02-26 at 18:42 +0200, Andy Shevchenko wrote:
> On Mon, Feb 26, 2018 at 4:56 PM, Eugeniy Paltsev
> <Eugeniy.Paltsev@xxxxxxxxxxxx> wrote:
>
> > + chip->core_clk = devm_clk_get(chip->dev, "core-clk");
>
> Does the name come from datasheet?
>
> > + chip->cfgr_clk = devm_clk_get(chip->dev, "cfgr-clk");
>
> Ditto?

Yes, these names came from datasheet.

> > + }
> > + /* Enable clk before accessing to registers */
> > + clk_prepare_enable(chip->cfgr_clk);
> > + clk_prepare_enable(chip->core_clk);
>
> Each of them may fail. Is it okay?

As it is driver remove callback I guess it is okay.

> > +static const struct dev_pm_ops dw_axi_dma_pm_ops = {
> > + SET_RUNTIME_PM_OPS(axi_dma_runtime_suspend, axi_dma_runtime_resume, NULL)
> > +};
>
> No system suspend?

Are you talking about SET_SYSTEM_SLEEP_PM_OPS?
I don't implement these OPS as we don't have any platform which has DW AXI DMAC
and supports sleeping - so I can't test them.

--
Eugeniy Paltsev