On 1/22/20 5:20 AM, Madalin Bucur wrote: > This addresses a HW erratum on some QorIQ DPAA devices. > > MDIO reads to internal PCS registers may result in having > the MDIO_CFG[MDIO_RD_ER] bit set, even when there is no > error and read data (MDIO_DATA[MDIO_DATA]) is correct. > Software may get false read error when reading internal > PCS registers through MDIO. As a workaround, all internal > MDIO accesses should ignore the MDIO_CFG[MDIO_RD_ER] bit. > When the issue was present, one could see such errors > during boot: > > mdio_bus ffe4e5000: Error while reading PHY0 reg at 3.3 Did you consider using the standard broken-turn-around property/support and set your mii_bus::phy_ignore_ta_mask to all relevant bits? > > Madalin Bucur (3): > dt-bindings: net: add fsl,erratum-a011043 > powerpc/fsl/dts: add fsl,erratum-a011043 > net/fsl: treat fsl,erratum-a011043 > > Documentation/devicetree/bindings/net/fsl-fman.txt | 13 +++++++++++++ > .../boot/dts/fsl/qoriq-fman3-0-10g-0-best-effort.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-10g-0.dtsi | 1 + > .../boot/dts/fsl/qoriq-fman3-0-10g-1-best-effort.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-10g-1.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-1g-0.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-1g-1.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-1g-2.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-1g-3.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-1g-4.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-0-1g-5.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-10g-0.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-10g-1.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-1g-0.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-1g-1.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-1g-2.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-1g-3.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-1g-4.dtsi | 1 + > arch/powerpc/boot/dts/fsl/qoriq-fman3-1-1g-5.dtsi | 1 + > drivers/net/ethernet/freescale/xgmac_mdio.c | 7 ++++++- > 20 files changed, 37 insertions(+), 1 deletion(-) > -- Florian
