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phy: apple: atc: Reset USB2 PHY during probe as well

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Now that the upstream Type-C PHY code is getting broader test coverage we
got reports of USB devices plugged in during boot or those plugged in for
the first time after boot occasionally not working correctly.
This is partially caused by the USB2 parts of the PHY being left in an
unknown state by the previous boot stages. We reset all other parts during
probe but forgot about the USB2 PHY so let's fix that and actually reset
and power off the USB2 PHY as well.

Reported-by: James Calligeros <jcalligeros99@gmail.com>
Reported-by: Janne Grunau <j@jannau.net>
Fixes: 8e98ca1e74 ("phy: apple: Add Apple Type-C PHY")
Signed-off-by: Sven Peter <sven@kernel.org>
Reviewed-by: Janne Grunau <j@jannau.net>
Tested-by: Janne Grunau <j@jannau.net>
Link: https://patch.msgid.link/20260108-atcphy-coldboot-fix-v1-1-01c41c6e84f2@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sven Peter 2026-01-08 20:12:06 +01:00 • committed by Vinod Koul
parent 7d55b44e2b
commit bc148def89
1 changed files with 1 additions and 0 deletions
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drivers/phy/apple/atc.c
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@ -2227,6 +2227,7 @@ static int atcphy_probe_finalize(struct apple_atcphy *atcphy)
_atcphy_dwc3_reset_assert(atcphy);
/* Reset atcphy to clear any state potentially left by the bootloader */
atcphy_usb2_power_off(atcphy);
atcphy_power_off(atcphy);
atcphy_setup_pipehandler(atcphy);