Hi,
On Wed, Aug 31, 2016 at 05:40:17PM -0700, Stephen Boyd wrote:
> @@ -174,14 +219,37 @@ 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;
>
> + return 0;
> +}
> +
> +static int ulpi_register(struct device *dev, struct ulpi *ulpi)
> +{
> + int ret;
> +
> ulpi->dev.parent = dev;
> ulpi->dev.bus = &ulpi_bus;
> ulpi->dev.type = &ulpi_dev_type;
> dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));
>
> + if (IS_ENABLED(CONFIG_OF)) {
I don't think you need to check that in this case.
> + ret = ulpi_of_register(ulpi);
> + if (ret)
> + return ret;
> + }
> +
> ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));
ACPI_COMPANION_SET will overwrite the primary fwnode unconditionally,
so just to play it safe, do this before you call ulpi_of_register().
> - request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
> + ret = ulpi_read_id(ulpi);
> + /*
> + * Ignore failure in case of DT node because the device may
> + * not be powered up yet but we can still match by compatible
> + */
> + if (ret && !ulpi->dev.of_node)
> + return ret;
> +
> + if (of_device_request_module(&ulpi->dev))
> + request_module("ulpi:v%04xp%04x", ulpi->id.vendor,
> + ulpi->id.product);
I don't think this works in all cases. If of_device_request_module()
fails and we don't have the id.vendor/product set, we should not
register the device. It also looks a bit messy.
How about just using of_device_request_module() call as fallback in
ulpi_read_id() and moving also request_module() call there:
diff --git a/drivers/usb/common/ulpi.c b/drivers/usb/common/ulpi.c
index 30ea770..667246c 100644
--- a/drivers/usb/common/ulpi.c
+++ b/drivers/usb/common/ulpi.c
@@ -205,14 +205,14 @@ static int ulpi_read_id(struct ulpi *ulpi)
/* Test the interface */
ret = ulpi_write(ulpi, ULPI_SCRATCH, 0xaa);
if (ret < 0)
- return ret;
+ goto err;
ret = ulpi_read(ulpi, ULPI_SCRATCH);
if (ret < 0)
- return ret;
+ goto err;
if (ret != 0xaa)
- return -ENODEV;
+ goto err;
ulpi->id.vendor = ulpi_read(ulpi, ULPI_VENDOR_ID_LOW);
ulpi->id.vendor |= ulpi_read(ulpi, ULPI_VENDOR_ID_HIGH) << 8;
@@ -220,7 +220,11 @@ static int ulpi_read_id(struct ulpi *ulpi)
ulpi->id.product = ulpi_read(ulpi, ULPI_PRODUCT_ID_LOW);
ulpi->id.product |= ulpi_read(ulpi, ULPI_PRODUCT_ID_HIGH) << 8;
+ request_module("ulpi:v%04xp%04x", ulpi->id.vendor, ulpi->id.product);
+
return 0;
+err:
+ return of_device_request_module(&ulpi->dev);
}
static int ulpi_register(struct device *dev, struct ulpi *ulpi)
@@ -232,25 +236,15 @@ static int ulpi_register(struct device *dev, struct ulpi *ulpi)
ulpi->dev.type = &ulpi_dev_type;
dev_set_name(&ulpi->dev, "%s.ulpi", dev_name(dev));
- if (IS_ENABLED(CONFIG_OF)) {
- ret = ulpi_of_register(ulpi);
- if (ret)
- return ret;
- }
-
ACPI_COMPANION_SET(&ulpi->dev, ACPI_COMPANION(dev));
- ret = ulpi_read_id(ulpi);
- /*
- * Ignore failure in case of DT node because the device may
- * not be powered up yet but we can still match by compatible
- */
- if (ret && !ulpi->dev.of_node)
+ ret = ulpi_of_register(ulpi);
+ if (ret)
return ret;
- if (of_device_request_module(&ulpi->dev))
- request_module("ulpi:v%04xp%04x", ulpi->id.vendor,
- ulpi->id.product);
+ ret = ulpi_read_id(ulpi);
+ if (ret)
+ return ret;
ret = device_register(&ulpi->dev);
if (ret)
Cheers,
--
heikki
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