6.17-stable review patch. If anyone has any objections, please let me know.

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From: Wei Fang wei.fang@nxp.com

[ Upstream commit c0a1f3d7e128e8d1b6c0fe09c68eac5ebcf677c8 ]

In the current driver, PPS and PEROUT use the same channel to generate the events, so they cannot be enabled at the same time. Otherwise, the later configuration will overwrite the earlier configuration. Therefore, when configuring PPS, the driver will check whether PEROUT is enabled. Similarly, when configuring PEROUT, the driver will check whether PPS is enabled.

Fixes: 350749b909bf ("net: fec: Add support for periodic output signal of PPS") Signed-off-by: Wei Fang wei.fang@nxp.com Link: https://patch.msgid.link/20251125085210.1094306-4-wei.fang@nxp.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/freescale/fec_ptp.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c index f31b1626c12f7..ed5d59abeb537 100644 --- a/drivers/net/ethernet/freescale/fec_ptp.c +++ b/drivers/net/ethernet/freescale/fec_ptp.c @@ -128,6 +128,12 @@ static int fec_ptp_enable_pps(struct fec_enet_private *fep, uint enable)

spin_lock_irqsave(&fep->tmreg_lock, flags);

+ if (fep->perout_enable) { + spin_unlock_irqrestore(&fep->tmreg_lock, flags); + dev_err(&fep->pdev->dev, "PEROUT is running"); + return -EBUSY; + } + if (fep->pps_enable == enable) { spin_unlock_irqrestore(&fep->tmreg_lock, flags); return 0; @@ -571,6 +577,12 @@ static int fec_ptp_enable(struct ptp_clock_info *ptp, } spin_lock_irqsave(&fep->tmreg_lock, flags);

+ if (fep->pps_enable) { + dev_err(&fep->pdev->dev, "PPS is running"); + ret = -EBUSY; + goto unlock; + } + if (fep->perout_enable) { dev_err(&fep->pdev->dev, "PEROUT has been enabled\n");