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- From eb860f6a2dee9a4c94a7101c1d43194b95fdbc8d Mon Sep 17 00:00:00 2001
- From: Phil Elwell <[email protected]>
- Date: Wed, 22 Sep 2021 15:38:13 +0100
- Subject: [PATCH] net: phy: lan87xx: Allow more time for link detect
- With EDPWRDOWN set in idle, it must be cleared before checking for
- ENERGYON going high, indicating that a link is being established.
- The existing code allows 640ms for ENERGYON to go high, but on
- Raspberry Pis that appears not to be enough, causing link detection
- to fail.
- Increase the polling timeout to 1500ms - with a polling interval of
- 10ms it shouldn't cause unnecessary delays.
- See: https://github.com/raspberrypi/linux/issues/4393
- Signed-off-by: Phil Elwell <[email protected]>
- ---
- drivers/net/phy/smsc.c | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
- --- a/drivers/net/phy/smsc.c
- +++ b/drivers/net/phy/smsc.c
- @@ -220,12 +220,12 @@ static int lan87xx_read_status(struct ph
- if (rc < 0)
- return rc;
-
- - /* Wait max 640 ms to detect energy and the timeout is not
- + /* Wait max 1500 ms to detect energy and the timeout is not
- * an actual error.
- */
- read_poll_timeout(phy_read, rc,
- rc & MII_LAN83C185_ENERGYON || rc < 0,
- - 10000, 640000, true, phydev,
- + 10000, 1500000, true, phydev,
- MII_LAN83C185_CTRL_STATUS);
- if (rc < 0)
- return rc;
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