diff options
| author | Rafael Beims <rafael.beims@toradex.com> | 2025-12-23 12:02:54 -0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-01-14 21:44:39 +0530 |
| commit | f2ec4723defbc66a50e0abafa830ae9f8bceb0d7 (patch) | |
| tree | 2b9c9f65994eb8ab06bf7dc1dee566156451dc05 | |
| parent | e07dea3de508cd6950c937cec42de7603190e1ca (diff) | |
phy: freescale: imx8m-pcie: assert phy reset during power on
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>
| -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 68fcc8114d75..7f5600103a00 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; } |