linux-kernel - Re: [PATCH v9 11/15] spi: dw: Add support for AMD Pensando Elba SoC

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Date:   Thu, 19 Jan 2023 11:58:26 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Brad Larson <blarson@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-spi@...r.kernel.org,
        adrian.hunter@...el.com, alcooperx@...il.com, arnd@...db.de,
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        devicetree@...r.kernel.org
Subject: Re: [PATCH v9 11/15] spi: dw: Add support for AMD Pensando Elba SoC

On Thu, Jan 19, 2023 at 5:52 AM Brad Larson <blarson@....com> wrote:
>
> The AMD Pensando Elba SoC includes a DW apb_ssi v4 controller
> with device specific chip-select control.  The Elba SoC
> provides four chip-selects where the native DW IP supports
> two chip-selects.  The Elba DW_SPI instance has two native
> CS signals that are always overridden.

...

> +struct dw_spi_elba {
> +       struct regmap *syscon;
> +};

Why can't struct regmap be used directly?

...

> +static void dw_spi_elba_override_cs(struct dw_spi_elba *dwselba, int cs, int enable)
> +{
> +       regmap_update_bits(dwselba->syscon, ELBA_SPICS_REG, ELBA_SPICS_MASK(cs),
> +                          ELBA_SPICS_SET(cs, enable));

> +

Redundant blank line.

> +}

...

> +               dev_err(&pdev->dev, "failed to find %s\n", syscon_name);
> +               return -ENODEV;

return dev_err_probe();

...

> +               dev_err(&pdev->dev, "syscon regmap lookup failed\n");
> +               return PTR_ERR(regmap);

Ditto.

-- 
With Best Regards,
Andy Shevchenko