[PATCH 2/2] arm64: dts: ti: k3-am642-tqma64xxl-mbax4xxl: add PRU Ethernet support

[Matthias Schiffer]

Add PRU Ethernet controller and PHY nodes, as it was previously done for
the AM64x EVM Device Trees.

Differing from the EVM, we add the virtual ethernet controller device
below &icssg1 instead of the top level. Besides being slighly more
accurate, this has the advantage that the node is implicitly disabled
when &icssg1 has status = "disabled" (which the TQMa64xxL bootloader
adds as a fixup when running on an AM64x variant without ICSSG support),
thus avoiding leaving the ethernet device in EPROBE_DEFER limbo forever.

Signed-off-by: Matthias Schiffer <matthias.schiffer at ew.tq-group.com>
---

k3-am642-evm.dts uses "ti-pruss/am64x-sr2-*" filenames instead of
"ti-pruss/am65x-sr2-*", however it is not clear to me where these would
come from - I'm not aware of any firmwares named like that.

So far, these firmwares are not in mainline linux-firmware; TI's
reference BSPs include firmware from ti-linux-firmware [1], and the same
"am65x-sr2" firmwares are used on AM65x and AM64x SoCs.

[1] https://git.ti.com/gitweb?p=processor-firmware/ti-linux-firmware.git;a=tree;f=ti-pruss;h=a220bdc6dce5e11845b5c6337ff9b2d329aee196;hb=refs/heads/ti-linux-firmware

 .../dts/ti/k3-am642-tqma64xxl-mbax4xxl.dts    | 100 ++++++++++++++++++
 1 file changed, 100 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl-mbax4xxl.dts b/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl-mbax4xxl.dts
index 1f4dc5ad1696a..0eff392a29b00 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl-mbax4xxl.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-tqma64xxl-mbax4xxl.dts
@@ -24,6 +24,8 @@ / {
 
 	aliases {
 		ethernet0 = &cpsw_port1;
+		ethernet1 = &icssg1_emac0;
+		ethernet2 = &icssg1_emac1;
 		i2c1 = &mcu_i2c0;
 		mmc1 = &sdhci1;
 		serial0 = &mcu_uart0;
@@ -154,6 +156,104 @@ &epwm5 {
 	status = "okay";
 };
 
+&icssg1 {
+	icssg1_eth: ethernet {
+		compatible = "ti,am642-icssg-prueth";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pru_icssg1_rgmii1_pins>, <&pru_icssg1_rgmii2_pins>;
+		interrupt-parent = <&icssg1_intc>;
+		interrupts = <24 0 2>, <25 1 3>;
+		interrupt-names = "tx_ts0", "tx_ts1";
+		dmas = <&main_pktdma 0xc200 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc201 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc202 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc203 15>, /* egress slice 0 */
+		       <&main_pktdma 0xc204 15>, /* egress slice 1 */
+		       <&main_pktdma 0xc205 15>, /* egress slice 1 */
+		       <&main_pktdma 0xc206 15>, /* egress slice 1 */
+		       <&main_pktdma 0xc207 15>, /* egress slice 1 */
+		       <&main_pktdma 0x4200 15>, /* ingress slice 0 */
+		       <&main_pktdma 0x4201 15>; /* ingress slice 1 */
+		dma-names = "tx0-0", "tx0-1", "tx0-2", "tx0-3",
+			    "tx1-0", "tx1-1", "tx1-2", "tx1-3",
+			    "rx0", "rx1";
+		sram = <&oc_sram>;
+		firmware-name = "ti-pruss/am65x-sr2-pru0-prueth-fw.elf",
+				"ti-pruss/am65x-sr2-rtu0-prueth-fw.elf",
+				"ti-pruss/am65x-sr2-txpru0-prueth-fw.elf",
+				"ti-pruss/am65x-sr2-pru1-prueth-fw.elf",
+				"ti-pruss/am65x-sr2-rtu1-prueth-fw.elf",
+				"ti-pruss/am65x-sr2-txpru1-prueth-fw.elf";
+		ti,prus = <&pru1_0>, <&rtu1_0>, <&tx_pru1_0>, <&pru1_1>, <&rtu1_1>, <&tx_pru1_1>;
+		ti,pruss-gp-mux-sel = <2>,	/* MII mode */
+				      <2>,
+				      <2>,
+				      <2>,	/* MII mode */
+				      <2>,
+				      <2>;
+		ti,mii-g-rt = <&icssg1_mii_g_rt>;
+		ti,mii-rt = <&icssg1_mii_rt>;
+		ti,iep = <&icssg1_iep0>,  <&icssg1_iep1>;
+
+		ethernet-ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			icssg1_emac0: port at 0 {
+				reg = <0>;
+				phy-handle = <&icssg1_phy0c>;
+				phy-mode = "rgmii-id";
+				/* Filled in by bootloader */
+				local-mac-address = [00 00 00 00 00 00];
+			};
+
+			icssg1_emac1: port at 1 {
+				reg = <1>;
+				phy-handle = <&icssg1_phy03>;
+				phy-mode = "rgmii-id";
+				/* Filled in by bootloader */
+				local-mac-address = [00 00 00 00 00 00];
+			};
+		};
+	};
+};
+
+&icssg1_mdio {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pru_icssg1_mdio_pins>;
+	status = "okay";
+
+	/* phy-mode is fixed up to rgmii-rxid by prueth driver to account for
+	 * the SoC integration, so the only rx-internal-delay and no
+	 * tx-internal-delay is set for the PHYs.
+	 */
+
+	icssg1_phy03: ethernet-phy at 3 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0x3>;
+		reset-gpios = <&main_gpio1 47 GPIO_ACTIVE_LOW>;
+		reset-assert-us = <1000>;
+		reset-deassert-us = <1000>;
+		ti,rx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+		ti,tx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
+		ti,clk-output-sel = <DP83867_CLK_O_SEL_OFF>;
+	};
+
+	icssg1_phy0c: ethernet-phy at c {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <0xc>;
+		reset-gpios = <&main_gpio1 51 GPIO_ACTIVE_LOW>;
+		reset-assert-us = <1000>;
+		reset-deassert-us = <1000>;
+		ti,rx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+		ti,tx-fifo-depth = <DP83867_PHYCR_FIFO_DEPTH_4_B_NIB>;
+		ti,rx-internal-delay = <DP83867_RGMIIDCTL_2_00_NS>;
+		ti,clk-output-sel = <DP83867_CLK_O_SEL_OFF>;
+	};
+};
+
+
 &main_gpio0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&main_gpio0_digital_pins>,
-- 
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