2022-05-16 21:40:32 +00:00
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From eb860f6a2dee9a4c94a7101c1d43194b95fdbc8d Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 22 Sep 2021 15:38:13 +0100
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Subject: [PATCH] net: phy: lan87xx: Allow more time for link detect
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With EDPWRDOWN set in idle, it must be cleared before checking for
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ENERGYON going high, indicating that a link is being established.
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The existing code allows 640ms for ENERGYON to go high, but on
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Raspberry Pis that appears not to be enough, causing link detection
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to fail.
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Increase the polling timeout to 1500ms - with a polling interval of
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10ms it shouldn't cause unnecessary delays.
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See: https://github.com/raspberrypi/linux/issues/4393
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/net/phy/smsc.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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--- a/drivers/net/phy/smsc.c
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+++ b/drivers/net/phy/smsc.c
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2022-08-22 12:02:36 +00:00
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@@ -230,12 +230,12 @@ static int lan87xx_read_status(struct ph
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2022-05-16 21:40:32 +00:00
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if (rc < 0)
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return rc;
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- /* Wait max 640 ms to detect energy and the timeout is not
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+ /* Wait max 1500 ms to detect energy and the timeout is not
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* an actual error.
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*/
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read_poll_timeout(phy_read, rc,
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rc & MII_LAN83C185_ENERGYON || rc < 0,
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- 10000, 640000, true, phydev,
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+ 10000, 1500000, true, phydev,
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MII_LAN83C185_CTRL_STATUS);
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if (rc < 0)
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return rc;
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