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| author | Rafael Beims <rafael.beims@toradex.com> | 2025-12-23 18:02:54 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-30 12:27:27 +0300 |
| commit | 16a6a73087fb49b8aaeb5771806d95f05b8a31d3 (patch) | |
| tree | c0b1116899211466f4b5a66b953931aa67e1bad1 /drivers/phy | |
| parent | 942381794fc31e567e360fe7125728619002da9a (diff) | |
| download | linux-16a6a73087fb49b8aaeb5771806d95f05b8a31d3.tar.xz | |
phy: freescale: imx8m-pcie: assert phy reset during power on
commit f2ec4723defbc66a50e0abafa830ae9f8bceb0d7 upstream.
After U-Boot initializes PCIe with "pcie enum", Linux fails to detect
an NVMe disk on some boot cycles with:
phy phy-32f00000.pcie-phy.0: phy poweron failed --> -110
Discussion with NXP identified that the iMX8MP PCIe PHY PLL may fail to
lock when re-initialized without a reset cycle [1].
The issue reproduces on 7% of tested hardware platforms, with a 30-40%
failure rate per affected device across boot cycles.
Insert a reset cycle in the power-on routine to ensure the PHY is
initialized from a known state.
[1] https://community.nxp.com/t5/i-MX-Processors/iMX8MP-PCIe-initialization-in-U-Boot/m-p/2248437#M242401
Signed-off-by: Rafael Beims <rafael.beims@toradex.com>
Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20251223150254.1075221-1-rafael@beims.me
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/freescale/phy-fsl-imx8m-pcie.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c index afd52392cd53..7bdf7aba41ff 100644 --- a/drivers/phy/freescale/phy-fsl-imx8m-pcie.c +++ b/drivers/phy/freescale/phy-fsl-imx8m-pcie.c @@ -89,7 +89,8 @@ static int imx8_pcie_phy_power_on(struct phy *phy) writel(imx8_phy->tx_deemph_gen2, imx8_phy->base + PCIE_PHY_TRSV_REG6); break; - case IMX8MP: /* Do nothing. */ + case IMX8MP: + reset_control_assert(imx8_phy->reset); break; } |