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

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On 12/7/23 8:06 AM, Anwar, Md Danish wrote:
On 12/7/2023 6:57 PM, Nishanth Menon wrote:
On 13:49-20231207, 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.

This patch adds overlay to support 1 x CPSW3g ports and 2 x ICSSG1 ports
configuration:
- 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               |  2 +
  .../dts/ti/k3-am642-evm-icssg1-dualemac.dtso  | 80 +++++++++++++++++++
  arch/arm64/boot/dts/ti/k3-am642-evm.dts       |  2 +-
  3 files changed, 83 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 5ef49b02c71f..99a4dce47f02 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -35,12 +35,14 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-csi2-imx219.dtbo
  dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-hdmi-audio.dtbo
# Boards with AM64x SoC
+k3-am642-evm-icssg1-dtbs := k3-am642-evm.dtb k3-am642-evm-icssg1-dualemac.dtbo

Why not handle this for CONFIG_OF_ALL_DTBS alone? See commit
b0044823a6607e535fdb083c89f487fbf183b171


I'll have to look into this.

I am merging this k3-am642-evm-icssg1-dualemac.dtbo with
k3-am642-evm.dtb because when I had posted patches for AM65x DTS, Andrew
had commented [1] saying we should not leave orphan dtbos and every dtbo
should be applied over some dtb by using `dtb- +=`.


And my comment on not having orphan DTBOs is still true. But that was back
in September, we now have a new way of accomplishing that without needing
to produce a bunch of temporary combined DTB files, which is what Nishanth
is pointing out with CONFIG_OF_ALL_DTBS.

So, no need for `k3-am642-evm-icssg1.dtb`, you can add the overlay target
directly, then create a fake target to test DTBO application by adding to
the `dtb- += ` lines below.

Andrew

Due to this I am applying the overlay on k3-am642-evm.dtb and creating
new dtb k3-am642-evm-icssg1.dtb which can be used when both ICSSG1 ports
are needed to be enabled.

[1] https://lore.kernel.org/all/ca832fe3-d5cf-b075-324b-50da40794bb7@xxxxxx/

  dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
  dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
  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.dtb
# Boards with AM65x SoC
  k3-am654-gp-evm-dtbs := k3-am654-base-board.dtb k3-am654-base-board-rocktech-rk101-panel.dtbo
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..6f33290c1ad6
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm-icssg1-dualemac.dtso
@@ -0,0 +1,80 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * 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"
+
+&{/} {
+	aliases {
+		ethernet1 = "/icssg1-eth/ethernet-ports/port@0";
+		ethernet2 = "/icssg1-eth/ethernet-ports/port@1";

I don't understand what you are overriding here. isn't patch #2 in your
series already introducing this in the base dts?


Sorry, My bad. I will remove this in v2.

+	};
+
+	mdio-mux-2 {
+		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>;
+			};
+		};
+	};
+};
+
+&main_pmx0 {
+	icssg1_rgmii2_pins_default: icssg1-rgmii2-default-pins {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x0108, PIN_INPUT, 2) /* (W11) PRG1_PRU1_GPO0.RGMII2_RD0 */
+			AM64X_IOPAD(0x010c, PIN_INPUT, 2) /* (V11) PRG1_PRU1_GPO1.RGMII2_RD1 */
+			AM64X_IOPAD(0x0110, PIN_INPUT, 2) /* (AA12) PRG1_PRU1_GPO2.RGMII2_RD2 */
+			AM64X_IOPAD(0x0114, PIN_INPUT, 2) /* (Y12) PRG1_PRU1_GPO3.RGMII2_RD3 */
+			AM64X_IOPAD(0x0120, PIN_INPUT, 2) /* (U11) PRG1_PRU1_GPO6.RGMII2_RXC */
+			AM64X_IOPAD(0x0118, PIN_INPUT, 2) /* (W12) PRG1_PRU1_GPO4.RGMII2_RX_CTL */
+			AM64X_IOPAD(0x0134, PIN_OUTPUT, 2) /* (AA10) PRG1_PRU1_GPO11.RGMII2_TD0 */
+			AM64X_IOPAD(0x0138, PIN_OUTPUT, 2) /* (V10) PRG1_PRU1_GPO12.RGMII2_TD1 */
+			AM64X_IOPAD(0x013c, PIN_OUTPUT, 2) /* (U10) PRG1_PRU1_GPO13.RGMII2_TD2 */
+			AM64X_IOPAD(0x0140, PIN_OUTPUT, 2) /* (AA11) PRG1_PRU1_GPO14.RGMII2_TD3 */
+			AM64X_IOPAD(0x0148, PIN_OUTPUT, 2) /* (Y10) PRG1_PRU1_GPO16.RGMII2_TXC */
+			AM64X_IOPAD(0x0144, PIN_OUTPUT, 2) /* (Y11) PRG1_PRU1_GPO15.RGMII2_TX_CTL */
+		>;
+	};
+};
+
+&cpsw3g {
+	pinctrl-0 = <&rgmii1_pins_default>;
+};
+
+&cpsw_port2 {
+	status = "disabled";
+};
+
+&mdio_mux_1 {
+	status = "disabled";
+};
+
+&icssg1_eth {
+	pinctrl-0 = <&icssg1_rgmii1_pins_default &icssg1_rgmii2_pins_default>;

Grrr... No! I have been cleaning up after you folks and you folks should
take notice.

pinctrl-0 = <&icssg1_rgmii1_pins_default>, <&icssg1_rgmii2_pins_default>;


Sorry, I was not aware of this. I will change it in v2.


+};
+
+&icssg1_emac1 {
+	status = "okay";
+	phy-handle = <&icssg1_phy2>;
+	phy-mode = "rgmii-id";
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 04d1c0602d31..90867090e725 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -203,7 +203,7 @@ mdio_mux: mux-controller {
  		mux-gpios = <&exp1 12 GPIO_ACTIVE_HIGH>;
  	};
- mdio-mux-1 {
+	mdio_mux_1: mdio-mux-1 {

Commit message doesn't warn me for this change.

Sure. I will add details of this in commit message saying `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.`

  		compatible = "mdio-mux-multiplexer";
  		mux-controls = <&mdio_mux>;
  		mdio-parent-bus = <&cpsw3g_mdio>;
--
2.34.1







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