• Leonard Crestez's avatar
    ARM: dts: imx6sx-sdb: Fix enet phy regulator · 1ad9fb75
    Leonard Crestez authored
    Bindings for "fixed-regulator" only explicitly support "gpio" property,
    not "gpios". Fix by correcting the property name.
    
    The enet PHYs on imx6sx-sdb needs to be explicitly reset after a power
    cycle, this can be handled by the phy-reset-gpios property. Sadly this
    is not handled on suspend: the fec driver turns phy-supply off but
    doesn't assert phy-reset-gpios again on resume.
    
    Since additional phy-level work is required to support powering off the
    phy in suspend fix the problem by just marking the regulator as
    "boot-on" "always-on" so that it's never turned off. This behavior is
    equivalent to older releases.
    
    Keep the phy-reset-gpios property on fec anyway because it is a correct
    description of board design.
    
    This issue was exposed by commit efdfeb07 ("regulator: fixed:
    Convert to use GPIO descriptor only") which causes the "gpios" property
    to also be parsed. Before that commit the "gpios" property had no
    effect, PHY reset was only handled in the the bootloader.
    
    This fixes linux-next boot failures previously reported here:
     https://lore.kernel.org/patchwork/patch/982437/#1177900
     https://lore.kernel.org/patchwork/patch/994091/#1178304Signed-off-by: default avatarLeonard Crestez <leonard.crestez@nxp.com>
    Signed-off-by: default avatarShawn Guo <shawnguo@kernel.org>
    1ad9fb75
imx6sx-sdb.dtsi 15.7 KB