> -----Original Message----- > From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> > Sent: Sunday, October 23, 2022 9:12 PM > To: Gaddam, Sarath Babu Naidu <sarath.babu.naidu.gaddam@xxxxxxx>; > davem@xxxxxxxxxxxxx; edumazet@xxxxxxxxxx; kuba@xxxxxxxxxx; > pabeni@xxxxxxxxxx; robh+dt@xxxxxxxxxx; richardcochran@xxxxxxxxx > Cc: krzysztof.kozlowski+dt@xxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; > devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > yangbo.lu@xxxxxxx; Pandey, Radhey Shyam > <radhey.shyam.pandey@xxxxxxx>; Sarangi, Anirudha > <anirudha.sarangi@xxxxxxx>; Katakam, Harini > <harini.katakam@xxxxxxx>; git (AMD-Xilinx) <git@xxxxxxx> > Subject: Re: [PATCH net-next V2] dt-bindings: net: ethernet-controller: Add > ptp-hardware-clock > > On 21/10/2022 01:41, Sarath Babu Naidu Gaddam wrote: > > There is currently no standard property to pass PTP device index > > information to ethernet driver when they are independent. > > > > ptp-hardware-clock property will contain phandle to PTP clock node. > > > > Freescale driver currently has this implementation but it will be good > > to agree on a generic (optional) property name to link to PTP phandle > > to Ethernet node. In future or any current ethernet driver wants to > > use this method of reading the PHC index,they can simply use this > > generic name and point their own PTP clock node, instead of creating > > separate property names in each ethernet driver DT node. > > > > axiethernet driver uses this method when PTP support is integrated. > > > > Example: > > fman0: fman@1a00000 { > > ptp-hardware-clock = <&ptp_timer0>; > > } > > > > ptp_timer0: ptp-timer@1afe000 { > > compatible = "fsl,fman-ptp-timer"; > > reg = <0x0 0x1afe000 0x0 0x1000>; > > } > > > > Signed-off-by: Sarath Babu Naidu Gaddam > > <sarath.babu.naidu.gaddam@xxxxxxx> > > --- > > We want binding to be reviewed/accepted and then make changes in > > freescale binding documentation to use this generic binding. > > No, send entire set. We need to see the users of it. > > > > > DT information: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ > > tree/arch/arm64/boot/dts/freescale/qoriq-fman3-0.dtsi#n23 > > Don't wrap links. It's not possible to click them... > > > > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ > > tree/Documentation/devicetree/bindings/net/fsl-fman.txt#n320 > > > > Freescale driver: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ > > tree/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c#n467 > > > > Changes in V2: > > 1) Changed the ptimer-handle to ptp-hardware-clock based on > > Richard Cochran's comment. > > 2) Updated commit description. > > --- > > .../devicetree/bindings/net/ethernet-controller.yaml | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git > > a/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > b/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > index 3aef506fa158..d2863c1dd585 100644 > > --- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > +++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml > > @@ -161,6 +161,11 @@ properties: > > - auto > > - in-band-status > > > > + ptp-hardware-clock: > > + $ref: /schemas/types.yaml#/definitions/phandle > > + description: > > + Specifies a reference to a node representing a IEEE1588 timer. > > Drop "Specifies a reference to". It's obvious from the schema. > > Aren't you expecting here some specific Devicetree node of IEEE1588 timer? > IOW, you expect to point to timer, but what this timer must provide? How is > this generic? Thanks for review comments. Format can be as documented by users Documentation/devicetree/bindings/ptp/ members. The node should be accessible to derive the index but the format of the PTP clock node is upto the vendor. > > In your commit msg you use multiple times "driver", so are you adding it only > to satisfy Linux driver requirements? What about other drivers, e.g. on BSD > or U-Boot? AFAIK this is for Linux. It is not relevant to uboot as there's no PTP support there. Thanks, Sarath