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net: phy: marvell: add sleep time after enabling the loopback bit 

Sleep time is added to ensure the phy to be ready after loopback
bit was set. This to prevent the phy loopback test from failing.

Fixes: 020a45aff1 ("net: phy: marvell: add Marvell specific PHY loopback")
Cc: <stable@vger.kernel.org> # 5.15.x
Signed-off-by: Muhammad Husaini Zulkifli <muhammad.husaini.zulkifli@intel.com>
Signed-off-by: Aminuddin Jamaluddin <aminuddin.jamaluddin@intel.com>
Link: https://lore.kernel.org/r/20221114065302.10625-1-aminuddin.jamaluddin@intel.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Aminuddin Jamaluddin 2022-11-14 14:53:02 +08:00 committed by Paolo Abeni
parent d349e9be5a
commit 18c532e449
1 changed files with 9 additions and 7 deletions
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16
drivers/net/phy/marvell.c
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@ -2015,14 +2015,16 @@ static int m88e1510_loopback(struct phy_device *phydev, bool enable)
if (err < 0)
return err;
/* FIXME: Based on trial and error test, it seem 1G need to have
* delay between soft reset and loopback enablement.
*/
if (phydev->speed == SPEED_1000)
msleep(1000);
err = phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
BMCR_LOOPBACK);
return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
BMCR_LOOPBACK);
if (!err) {
/* It takes some time for PHY device to switch
* into/out-of loopback mode.
*/
msleep(1000);
}
return err;
} else {
err = phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
if (err < 0)