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Date: Wed, 19 Jun 2024 13:24:06 +0200
From: Matthias Schiffer <matthias.schiffer@...tq-group.com>
To: Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Nishanth Menon <nm@...com>,
Vignesh Raghavendra <vigneshr@...com>,
Tero Kristo <kristo@...nel.org>,
Suman Anna <s-anna@...com>
Cc: devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux@...tq-group.com,
Matthias Schiffer <matthias.schiffer@...tq-group.com>
Subject: [PATCH 2/2] arm64: dts: ti: k3-am642-tqma64xxl-mbax4xxl: add PRU Ethernet support
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@...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@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@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@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@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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