Le 07/12/2014 19:35, Wenyou Yang a écrit :
> Appearance: On some boards, after power up, the Ethernet doesn't work.
>
> Reason: On the SAMA5D4EK, the PIOE2 pin is connected to the NAND_Tree# of
> KSZ8081,
> But it outputs LOW during the reset period, which cause the NAND_Tree#
> enabled.
>
> Workaround: In the .config_init(), add code to disable NAND_Tree#
> by operating Operation Mode Strap Override(i.e. Register 16h).
Your patch won't apply cleanly to the net-next tree where the PHY
drivers development is happening, especially not after Johan's recent
changes.
Is not what you are looking for a phy_fixup() rather than clearing this
bit for all Micrel PHYs?
>
> Signed-off-by: Wenyou Yang <wenyou.y...@atmel.com>
> ---
> drivers/net/phy/micrel.c | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c
> index 8c2a29a..11d72cb 100644
> --- a/drivers/net/phy/micrel.c
> +++ b/drivers/net/phy/micrel.c
> @@ -31,6 +31,7 @@
> /* Operation Mode Strap Override */
> #define MII_KSZPHY_OMSO 0x16
> #define KSZPHY_OMSO_B_CAST_OFF (1 << 9)
> +#define KSZPHY_OMSO_NAND_TREE_OVERRIDE (1 << 5)
> #define KSZPHY_OMSO_RMII_OVERRIDE (1 << 1)
> #define KSZPHY_OMSO_MII_OVERRIDE (1 << 0)
>
> @@ -180,7 +181,12 @@ static int kszphy_setup_led(struct phy_device *phydev,
>
> static int kszphy_config_init(struct phy_device *phydev)
> {
> - return 0;
> + int rc;
> +
> + phy_write(phydev, MII_KSZPHY_OMSO, phy_read(phydev, MII_KSZPHY_OMSO)
> + & (~KSZPHY_OMSO_NAND_TREE_OVERRIDE));
> + rc = ksz_config_flags(phydev);
> + return rc < 0 ? rc : 0;
> }
>
> static int kszphy_config_init_led8041(struct phy_device *phydev)
>
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