Re: [PATCH v3 3/3] arm64: dts: ti: k3-am642-evm: add overlay for icssg1 2nd port

From: MD Danish Anwar
Date: Mon Feb 12 2024 - 03:07:23 EST

Hi Roger,

On 02/02/24 5:56 pm, Roger Quadros wrote:
>
>
> On 22/01/2024 13:30, MD Danish Anwar wrote:
>> The am642-evm doesn't allow to enable 2 x CPSW3g ports and 2 x ICSSG1 ports
>> all together, so base k3-am642-evm.dts enables by default 2 x CPSW3g ports
>> and 1 x ICSSG1 ports, but it also possible to support 1 x CPSW3g ports and
>> 2 x ICSSG1 ports configuration.
>
> "it is also possible"
>
> OK so there can only be 3 ethernet ports on this board. There is no "ethernet3" alias.
>
>>
>> This patch adds overlay to support 1 x CPSW3g ports and 2 x ICSSG1 ports
>> configuration:
>> - Add label name 'mdio_mux_1' for 'mdio-mux-1' node so that the node
>> 'mdio-mux-1' can be disabled in the overlay using the label name.
>> - disable 2nd CPSW3g port
>> - update CPSW3g pinmuxes to not use RGMII2
>> - disable mdio-mux-1 and define mdio-mux-2 to route ICSSG1 MDIO to the
>> shared DP83869 PHY
>> - add and enable ICSSG1 RGMII2 pinmuxes
>> - enable ICSSG1 MII1 port
>>
>> Signed-off-by: MD Danish Anwar <danishanwar@xxxxxx>
>> ---
>> arch/arm64/boot/dts/ti/Makefile | 5 ++
>> .../dts/ti/k3-am642-evm-icssg1-dualemac.dtso | 75 +++++++++++++++++++
>> arch/arm64/boot/dts/ti/k3-am642-evm.dts | 2 +-
>> 3 files changed, 81 insertions(+), 1 deletion(-)
>> create mode 100644 arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
>>
>> diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
>> index 52c1dc910308..320b2fae5730 100644
>> --- a/arch/arm64/boot/dts/ti/Makefile
>> +++ b/arch/arm64/boot/dts/ti/Makefile
>> @@ -43,6 +43,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
>> dtb-$(CONFIG_ARCH_K3) += k3-am642-tqma64xxl-mbax4xxl.dtb
>> dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-sdcard.dtbo
>> dtb-$(CONFIG_ARCH_K3) += k3-am64-tqma64xxl-mbax4xxl-wlan.dtbo
>> +dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg1-dualemac.dtbo
>>
>> # Boards with AM65x SoC
>> k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb k3-am654-base-board-rocktech-rk101-panel.dtbo
>> @@ -105,6 +106,8 @@ k3-am642-tqma64xxl-mbax4xxl-sdcard-dtbs := \
>> k3-am642-tqma64xxl-mbax4xxl.dtb k3-am64-tqma64xxl-mbax4xxl-sdcard.dtbo
>> k3-am642-tqma64xxl-mbax4xxl-wlan-dtbs := \
>> k3-am642-tqma64xxl-mbax4xxl.dtb k3-am64-tqma64xxl-mbax4xxl-wlan.dtbo
>> +k3-am642-evm-icssg1-dualemac-dtbs := \
>> + k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac.dtbo
>> k3-j721e-evm-pcie0-ep-dtbs := k3-j721e-common-proc-board.dtb \
>> k3-j721e-evm-pcie0-ep.dtbo
>> k3-j721s2-evm-pcie1-ep-dtbs := k3-j721s2-common-proc-board.dtb \
>> @@ -120,6 +123,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
>> k3-am62a7-sk-csi2-ov5640.dtb \
>> k3-am642-tqma64xxl-mbax4xxl-sdcard.dtb \
>> k3-am642-tqma64xxl-mbax4xxl-wlan.dtb \
>> + k3-am642-evm-icssg1-dualemac.dtb \
>> k3-j721e-evm-pcie0-ep.dtb \
>> k3-j721s2-evm-pcie1-ep.dtb
>>
>> @@ -129,6 +133,7 @@ DTC_FLAGS_k3-am625-sk += -@
>> DTC_FLAGS_k3-am62-lp-sk += -@
>> DTC_FLAGS_k3-am62a7-sk += -@
>> DTC_FLAGS_k3-am642-tqma64xxl-mbax4xxl += -@
>> +DTC_FLAGS_k3-am642-evm += -@
>> DTC_FLAGS_k3-am6548-iot2050-advanced-m2 += -@
>> DTC_FLAGS_k3-j721e-common-proc-board += -@
>> DTC_FLAGS_k3-j721s2-common-proc-board += -@
>> diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
>> new file mode 100644
>> index 000000000000..b2b1a6252e73
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
>> @@ -0,0 +1,75 @@
>> +// SPDX-License-Identifier: GPL-2.0
>
> Don't you need to use updated licensing header like in the series [1]
>
> [1] https://lore.kernel.org/all/20240110140903.4090946-1-nm@xxxxxx/
>
>> +/**
>> + * DT overlay for enabling 2nd ICSSG1 port on AM642 EVM
>> + *
>> + * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com/
>> + */
>> +
>> +/dts-v1/;
>> +/plugin/;
>> +
>> +#include <dt-bindings/gpio/gpio.h>
>> +#include "k3-pinctrl.h"
>> +
>> +&{/} {
>
> You need to fixup alias for ethernet1 to icssg1_emac1?
>
>> + mdio-mux-2 {
>
> this should be mdio-mux@0 ?
>
>> + compatible = "mdio-mux-multiplexer";
>> + mux-controls = <&mdio_mux>;
>> + mdio-parent-bus = <&icssg1_mdio>;
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + mdio@0 {
>> + reg = <0x0>;
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + icssg1_phy2: ethernet-phy@3 {
>> + reg = <3>;
>> + tx-internal-delay-ps = <250>;
>> + rx-internal-delay-ps = <2000>;
>> + };
>> + };
>> + };
>> +};
>> +

<snip>

>> +};
>> diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
>> index c08b0223be52..6ae43c12419f 100644
>> --- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
>> +++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
>> @@ -200,7 +200,7 @@ mdio_mux: mux-controller {
>> mux-gpios = <&exp1 12 GPIO_ACTIVE_HIGH>;
>> };
>>
>> - mdio-mux-1 {
>> + mdio_mux_1: mdio-mux-1 {
>
> mdio_mux_1: mdio-mux@1
>

Changing this from mdio-mux-1 to mdio-mux@1 is giving me erorr in DTBS_CHECK

/home/danish/workspace/linux-next/arch/arm64/boot/dts/ti/k3-am642-evm.dtb:
/: mdio-mux@1: 'anyOf' conditional failed, one must be fixed:
'reg' is a required property
'ranges' is a required property
from schema $id: http://devicetree.org/schemas/root-node.yaml#

The documentation of mdio-mux-multiplexer [1] also has example section
with node name as -1 instead of @1. I don't think node should be renamed
to mdio-mux@1.

I hadn't done DTBS_CHECK earlier have already made this change in v4
[2]. I will revert back this change and keep the nodes as mdio-mux-1 and
mdio-mux-2 in v5. Let me know if it's OK with you.

[1]
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/Documentation/devicetree/bindings/net/mdio-mux-multiplexer.yaml#n34
[2] https://lore.kernel.org/all/20240205090546.4000446-4-danishanwar@xxxxxx/

>> compatible = "mdio-mux-multiplexer";
>> mux-controls = <&mdio_mux>;
>> mdio-parent-bus = <&cpsw3g_mdio>;
>

--
Thanks and Regards,
Danish