• Martin Blumenstingl's avatar
    ARM: dts: meson: switch to the generic Ethernet PHY reset bindings · a2c6e82e
    Martin Blumenstingl authored
    The snps,reset-gpio bindings are deprecated in favour of the generic
    "Ethernet PHY reset" bindings.
    
    Replace snps,reset-gpio from the &ethmac node with reset-gpios in the
    ethernet-phy node. The old snps,reset-active-low property is now encoded
    directly as GPIO flag inside the reset-gpios property.
    
    snps,reset-delays-us is converted to reset-assert-us and
    reset-deassert-us. reset-assert-us is the second cell from
    snps,reset-delays-us while reset-deassert-us was the third cell.
    Instead of blindly copying the old values (which seems strange since
    they gave the PHY one second to come out of reset) over this also
    updates the delays based on the datasheets:
    - RTL8211F PHY on the Odroid-C1 and MXIII-Plus needs a 10ms assert
      delay (the datasheet mentions: "For a complete PHY reset, this pin
      must be asserted low for at least 10ms") and a 30ms deassert delay
      (the datasheet mentions: "Wait for a further 30ms (for internal
      circuits settling time) before accessing the PHY register"). The
      old settings used 10ms for assert and 1000ms for deassert.
    - IP101GR PHY on the EC-100 and MXQ needs a 10ms assert delay (the
      datasheet mentions: "Trst | Reset period | 10ms") and a 10ms deassert
      delay as well (the datasheet mentions: "Tclk_MII_rdy | MII/RMII clock
      output ready after reset released | 10ms")). The old settings used
      10ms for assert and 1000ms for deassert.
    
    No functional changes intended.
    Reviewed-by: default avatarNeil Armstrong <narmstrong@baylibre.com>
    Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
    Signed-off-by: default avatarKevin Hilman <khilman@baylibre.com>
    a2c6e82e
meson8b-mxq.dts 2.73 KB