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miidev: actually probe the PHY 

Check if the PHY is really accessible (e.g. the
PHY address is correct) during probe.

Signed-off-by: Johannes Stezenbach <js@sig21.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Johannes Stezenbach 2012-06-18 16:47:56 +02:00 committed by Sascha Hauer
parent 467d9d9cee
commit 1b725b9c44
1 changed files with 12 additions and 0 deletions
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12
drivers/net/miidev.c
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@ -224,6 +224,14 @@ static struct file_operations miidev_ops = {
static int miidev_probe(struct device_d *dev)
{
struct mii_device *mdev = dev->priv;
int val;
val = mii_read(mdev, mdev->address, MII_PHYSID1);
if (val < 0 || val == 0xffff)
goto err_out;
val = mii_read(mdev, mdev->address, MII_PHYSID2);
if (val < 0 || val == 0xffff)
goto err_out;
mdev->cdev.name = asprintf("phy%d", dev->id);
mdev->cdev.size = 64;
@ -233,6 +241,10 @@ static int miidev_probe(struct device_d *dev)
devfs_create(&mdev->cdev);
list_add_tail(&mdev->list, &miidev_list);
return 0;
err_out:
dev_err(dev, "cannot read PHY registers (addr %d)\n", mdev->address);
return -ENODEV;
}
static void miidev_remove(struct device_d *dev)