| Message ID | 20200730195749.4922-2-bruno.thomsen@gmail.com |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | Improve MDIO Ethernet PHY reset | expand |
On Thu, Jul 30, 2020 at 09:57:46PM +0200, Bruno Thomsen wrote: > Add "reset-post-delay-us" parameter to MDIO bus properties, > so it's possible to add a delay after reset deassert. > This is optional in case external hardware slows down > release of the reset signal. > > Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Andrew
On 7/30/2020 12:57 PM, Bruno Thomsen wrote: > Add "reset-post-delay-us" parameter to MDIO bus properties, > so it's possible to add a delay after reset deassert. > This is optional in case external hardware slows down > release of the reset signal. > > Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> > --- > Documentation/devicetree/bindings/net/mdio.yaml | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/Documentation/devicetree/bindings/net/mdio.yaml b/Documentation/devicetree/bindings/net/mdio.yaml > index d6a3bf8550eb..26afb556dfae 100644 > --- a/Documentation/devicetree/bindings/net/mdio.yaml > +++ b/Documentation/devicetree/bindings/net/mdio.yaml > @@ -39,6 +39,13 @@ properties: > and must therefore be appropriately determined based on all devices > requirements (maximum value of all per-device RESET pulse widths). > > + reset-post-delay-us: > + description: > + Delay after reset deassert in microseconds. It applies to all MDIO > + devices and it's determined by how fast all devices are ready for Uber nit: it is should be spelled out, but that does not warrant a resend.
diff --git a/Documentation/devicetree/bindings/net/mdio.yaml b/Documentation/devicetree/bindings/net/mdio.yaml index d6a3bf8550eb..26afb556dfae 100644 --- a/Documentation/devicetree/bindings/net/mdio.yaml +++ b/Documentation/devicetree/bindings/net/mdio.yaml @@ -39,6 +39,13 @@ properties: and must therefore be appropriately determined based on all devices requirements (maximum value of all per-device RESET pulse widths). + reset-post-delay-us: + description: + Delay after reset deassert in microseconds. It applies to all MDIO + devices and it's determined by how fast all devices are ready for + communication. This delay happens just before e.g. Ethernet PHY + type ID auto detection. + clock-frequency: description: Desired MDIO bus clock frequency in Hz. Values greater than IEEE 802.3
Add "reset-post-delay-us" parameter to MDIO bus properties, so it's possible to add a delay after reset deassert. This is optional in case external hardware slows down release of the reset signal. Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com> --- Documentation/devicetree/bindings/net/mdio.yaml | 7 +++++++ 1 file changed, 7 insertions(+)