linux-kernel - Re: [PATCH 1/3 v2] usb: host: fotg2: add device tree probing

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Date:   Fri, 10 Feb 2017 14:12:36 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Hans Ulli Kroll <ulli.kroll@...glemail.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 1/3 v2] usb: host: fotg2: add device tree probing

On Thu, Feb 9, 2017 at 3:20 PM, Hans Ulli Kroll
<ulli.kroll@...glemail.com> wrote:

> Add device tree probe for fotg2 driver
>
> v2:
> fix in wrong MODULE_DEVICE_TABLE
>
> Signed-off-by: Hans Ulli Kroll <ulli.kroll@...glemail.com>

Acked-by: Linus Walleij <linus.walleij@...aro.org>

> +       /* Right now device-tree probed devices don't get dma_mask set.
> +        * Since shared usb code relies on it, set it here for now.
> +        * Once we have dma capability bindings this can go away.
> +        */
> +
> +       retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
> +       if (retval)
> +               goto fail_create_hcd;

Were you able to test this part? I saw the gemini has some DMA engine
but I never saw a driver for it. It looks like a reasonable thing to do to
my untrained DMA eye.

Yours,
Linus Walleij