On 22.07.2020 14:38, Codrin Ciubotariu - M19940 wrote:
> On 22.07.2020 13:32, Claudiu Beznea - M18063 wrote:
>>
>>
>> On 21.07.2020 20:13, Codrin Ciubotariu wrote:
>>> Adding the PHY nodes directly under the Ethernet node became deprecated,
>>> so the aim of this patch series is to make MACB use an MDIO node as
>>> container for MDIO devices.
>>> This patch series starts with a small patch to use the device-managed
>>> devm_mdiobus_alloc(). In the next two patches we update the bindings and
>>> adapt macb driver to parse the device-tree PHY nodes from under an MDIO
>>> node. The last patches add the MDIO node in the device-trees of sama5d2,
>>> sama5d3, samad4 and sam9x60 boards.
>>>
>>
>> Tested this series on sama5d2_xplained in the following scenarios:
>>
>> 1/ PHY bindings from patch 4/7:
>> mdio {
>> #address-cells = <1>;
>> #size-cells = <0>;
>> ethernet-phy@1 {
>> reg = <0x1>;
>> interrupt-parent = <&pioA>;
>> interrupts = <PIN_PC9 IRQ_TYPE_LEVEL_LOW>;
>> };
>>
>> 2/ PHY bindings before this series:
>> ethernet-phy@1 {
>> reg = <0x1>;
>> interrupt-parent = <&pioA>;
>> interrupts = <PIN_PC9 IRQ_TYPE_LEVEL_LOW>;
>> };
>>
>> 3/ No PHY bindings at all.
>>
>> All 3 cases went OK.
>>
>> You can add:
>> Tested-by: Claudiu Beznea <claudiu.bez...@microchip.com>
>> Acked-by: Claudiu Beznea <claudiu.bez...@microchip.com>
>
> Thank you very much Claudiu!
> There is still one more case in my mind. macb could be a fixed-link with
> an MDIO DSA switch. While the macb would have a fixed connection with a
> port from the DSA switch, the switch could be configured using macb's
> MDIO. The dt would be something like:
>
> macb {
> fixed-link {
> ...
> };
> mdio {
> switch@0 {
> ...
> };
> };
> };
Do you have a setup for testing this? At the moment I don't know a
configuration like this that macb is working with.
>
> To support this, in patch 3/7 I should first check for the mdio node to
> return of_mdiobus_register() and then check if it's a fixed-link to
> return simple mdiobus_register(). I will address this in v3...>
> Thanks and best regards,
> Codrin
>
>>
>> Thank you,
>> Claudiu Beznea
>>
>>> Changes in v2:
>>> - renamed patch 2/7 from "macb: bindings doc: use an MDIO node as a
>>> container for PHY nodes" to "dt-bindings: net: macb: use an MDIO
>>> node as a container for PHY nodes"
>>> - added back a newline removed by mistake in patch 3/7
>>>
>>> Codrin Ciubotariu (7):
>>> net: macb: use device-managed devm_mdiobus_alloc()
>>> dt-bindings: net: macb: use an MDIO node as a container for PHY nodes
>>> net: macb: parse PHY nodes found under an MDIO node
>>> ARM: dts: at91: sama5d2: add an mdio sub-node to macb
>>> ARM: dts: at91: sama5d3: add an mdio sub-node to macb
>>> ARM: dts: at91: sama5d4: add an mdio sub-node to macb
>>> ARM: dts: at91: sam9x60: add an mdio sub-node to macb
>>>
>>> Documentation/devicetree/bindings/net/macb.txt | 15 ++++++++++++---
>>> arch/arm/boot/dts/at91-sam9x60ek.dts | 8 ++++++--
>>> arch/arm/boot/dts/at91-sama5d27_som1.dtsi | 16 ++++++++++------
>>> arch/arm/boot/dts/at91-sama5d27_wlsom1.dtsi | 17 ++++++++++-------
>>> arch/arm/boot/dts/at91-sama5d2_ptc_ek.dts | 13 ++++++++-----
>>> arch/arm/boot/dts/at91-sama5d2_xplained.dts | 12 ++++++++----
>>> arch/arm/boot/dts/at91-sama5d3_xplained.dts | 16 ++++++++++++----
>>> arch/arm/boot/dts/at91-sama5d4_xplained.dts | 12 ++++++++----
>>> drivers/net/ethernet/cadence/macb_main.c | 18 ++++++++++++------
>>> 9 files changed, 86 insertions(+), 41 deletions(-)
>
