Re: [PATCH 2/3] soc: amazon: al-pos: Introduce Amazon's Annapurna Labs POS driver

[Arnd Bergmann]

On Mon, Sep 9, 2019 at 11:14 AM Talel Shenhar <talel@xxxxxxxxxx> wrote:
>
> The Amazon's Annapurna Labs SoCs includes Point Of Serialization error
> logging unit that reports an error in case write error (e.g. attempt to
> write to a read only register).
> This patch introduces the support for this unit.
>
> Signed-off-by: Talel Shenhar <talel@xxxxxxxxxx>

Looks ok overall, juts a few minor comments:

> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Talel Shenhar");
> +MODULE_DESCRIPTION("Amazon's Annapurna Labs POS driver");

These usually go to the end of the file.

> +       log1 = readl_relaxed(pos->mmio_base + AL_POS_ERROR_LOG_1);
> +       if (!FIELD_GET(AL_POS_ERROR_LOG_1_VALID, log1))
> +               return IRQ_NONE;
> +
> +       log0 = readl_relaxed(pos->mmio_base + AL_POS_ERROR_LOG_0);
> +       writel_relaxed(0, pos->mmio_base + AL_POS_ERROR_LOG_1);

Why do you require _relaxed() accessors here? Please add a comment
explaining that, or use the regular readl()/writel().

> +       resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       pos->mmio_base = devm_ioremap_resource(&pdev->dev, resource);

This can be simplified to devm_platform_ioremap_resource().

> +       pos->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);

And this is usually written as platform_get_irq()

       Arnd