On 3/30/21 3:54 PM, Oleksij Rempel wrote:
> PHY loopback is needed for the ethernet controller self test support.
> This PHY was tested with the FEC sefltest.
>
> Signed-off-by: Oleksij Rempel <o.rem...@pengutronix.de>
> ---
> drivers/net/phy/at803x.c | 25 +++++++++++++++++++++++++
> 1 file changed, 25 insertions(+)
>
> diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
> index d7799beb811c..8679738cf2ab 100644
> --- a/drivers/net/phy/at803x.c
> +++ b/drivers/net/phy/at803x.c
> @@ -326,6 +326,30 @@ static int at803x_resume(struct phy_device *phydev)
> return phy_modify(phydev, MII_BMCR, BMCR_PDOWN | BMCR_ISOLATE, 0);
> }
>
> +static int at803x_loopback(struct phy_device *phydev, bool enable)
> +{
> + int ret;
> +
> + if (enable)
> + ret = phy_clear_bits(phydev, MII_BMCR, BMCR_ANENABLE);
> + else
> + ret = phy_set_bits(phydev, MII_BMCR, BMCR_ANENABLE);
> +
> + if (ret)
> + return ret;
> +
> + ret = genphy_loopback(phydev, enable);
> +
> + /*
> + * Loop back needs some time to start transmitting packets in the loop.
> + * Documentation says nothing about it, so I take time which seems to
> + * work on AR8085.
> + *//* Keep in mind the net multi line comment * style. */ Marc -- Pengutronix e.K. | Marc Kleine-Budde | Embedded Linux | https://www.pengutronix.de | Vertretung West/Dortmund | Phone: +49-231-2826-924 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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