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| author | Richard Leitner <richard.leitner@skidata.com> | 2017-12-11 13:16:57 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-13 11:22:53 -0500 |
| commit | 3a30ae6ef3cba29c83ca791bde0d06f182d5678d (patch) | |
| tree | f2da147aeebdf7292a3e1b46e657ca623382310a /Documentation | |
| parent | 9cca5d2f1be941c2fbe0ac192a139fe1b93d2c3c (diff) | |
| download | linux-3a30ae6ef3cba29c83ca791bde0d06f182d5678d.tar.bz2 | |
phylib: Add device reset delay support
Some PHYs need a minimum time after the reset gpio was asserted and/or
deasserted. To ensure we meet these timing requirements add two new
optional devicetree parameters for the phy: reset-delay-us and
reset-post-delay-us.
Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/net/phy.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/phy.txt b/Documentation/devicetree/bindings/net/phy.txt index c05479f5ac7c..72860ce7f610 100644 --- a/Documentation/devicetree/bindings/net/phy.txt +++ b/Documentation/devicetree/bindings/net/phy.txt @@ -55,6 +55,12 @@ Optional Properties: - reset-gpios: The GPIO phandle and specifier for the PHY reset signal. +- reset-delay-us: Delay after the reset was asserted in microseconds. + If this property is missing the delay will be skipped. + +- reset-post-delay-us: Delay after the reset was deasserted in microseconds. + If this property is missing the delay will be skipped. + Example: ethernet-phy@0 { @@ -62,4 +68,8 @@ ethernet-phy@0 { interrupt-parent = <&PIC>; interrupts = <35 IRQ_TYPE_EDGE_RISING>; reg = <0>; + + reset-gpios = <&gpio1 4 GPIO_ACTIVE_LOW>; + reset-delay-us = <1000>; + reset-post-delay-us = <2000>; }; |