Re: [PATCH v4 03/22] usb: ulpi: Support device discovery via DT

[Stephen Boyd <stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>]

Quoting Stephen Boyd (2016-09-07 14:35:00)
> @@ -174,6 +219,21 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi)
>         ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);
>         ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;
>  
> +       /* Some ULPI devices don't have a vendor id so rely on OF match */
> +       if (ulpi->id.vendor == 0)
> +               goto err;
> +
> +       request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
> +
> +       return 0;
> +err:
> +       return of_device_request_module(&ulpi->dev);

This can't return the value of of_device_request_module() because that
returns an error if the module is builtin or if module loading is
disabled. I'll have to ignore the error here and just return success all
the time.
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