[PATCH v5 2/3] arm: dts: ti: Add device tree support for PRU-ICSS on AM437x
From: Parvathi Pudi <parvathi@couthit.com>
Date: 2026-03-07 12:28:25
Also in:
linux-devicetree, linux-omap, lkml
Subsystem:
omap device tree support, the rest · Maintainers:
Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
From: Roger Quadros <redacted> The TI Sitara AM437x series of devices consists of 2 PRU-ICSS instances (PRU-ICSS0 and PRU-ICSS1). This patch adds the device tree nodes for the PRU-ICSS1 instance to support DUAL-MAC mode of operation. Support for Ethernet over PRU is available only for ICSS1 instance. PRU-ICSS instance consists of two PRU cores along with various peripherals such as the Interrupt Controller (PRU_INTC), the Industrial Ethernet Peripheral(IEP), the Real Time Media Independent Interface controller (MII_RT), and the Enhanced Capture (eCAP) event module. am4372.dtsi - Adds IEP and eCAP peripheral as child nodes of the PRUSS subsystem node. am437x-idk-evm.dts - Adds PRU-ICSS instance node along with PRU eth port information and corresponding port configuration. It includes interrupt mapping for packet reception, HW timestamp collection, and PRU Ethernet ports in MII mode, GPIO configuration, boot strapping along with delay configuration for individual PRU Ethernet port and other required nodes. Signed-off-by: Roger Quadros <redacted> Signed-off-by: Andrew F. Davis <redacted> Signed-off-by: Murali Karicheri <redacted> Signed-off-by: Basharath Hussain Khaja <redacted> Signed-off-by: Parvathi Pudi <parvathi@couthit.com> --- arch/arm/boot/dts/ti/omap/am4372.dtsi | 11 ++ arch/arm/boot/dts/ti/omap/am437x-idk-evm.dts | 103 ++++++++++++++++++- 2 files changed, 113 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/ti/omap/am4372.dtsi b/arch/arm/boot/dts/ti/omap/am4372.dtsi
index 504fa6b57d39..494f251c8e6a 100644
--- a/arch/arm/boot/dts/ti/omap/am4372.dtsi
+++ b/arch/arm/boot/dts/ti/omap/am4372.dtsi@@ -476,6 +476,17 @@ pruss1_mii_rt: mii-rt@32000 { reg = <0x32000 0x58>; }; + pruss1_iep: iep@2e000 { + compatible = "ti,am4376-icss-iep"; + reg = <0x2e000 0x31c>; + clocks = <&pruss1_iepclk_mux>; + }; + + pruss1_ecap: ecap@30000 { + compatible = "ti,pruss-ecap"; + reg = <0x30000 0x60>; + }; + pruss1_intc: interrupt-controller@20000 { compatible = "ti,pruss-intc"; reg = <0x20000 0x2000>;
diff --git a/arch/arm/boot/dts/ti/omap/am437x-idk-evm.dts b/arch/arm/boot/dts/ti/omap/am437x-idk-evm.dts
index 826f687c368a..aea00b21c68f 100644
--- a/arch/arm/boot/dts/ti/omap/am437x-idk-evm.dts
+++ b/arch/arm/boot/dts/ti/omap/am437x-idk-evm.dts@@ -168,6 +168,48 @@ led-out7 { default-state = "off"; }; }; + + /* Dual-MAC Ethernet application node on PRU-ICSS1 */ + pruss1_eth: pruss1-eth { + compatible = "ti,am4376-prueth"; + ti,prus = <&pru1_0>, <&pru1_1>; + sram = <&ocmcram>; + ti,mii-rt = <&pruss1_mii_rt>; + ti,iep = <&pruss1_iep>; + ti,ecap = <&pruss1_ecap>; + interrupts = <20 2 2>, <21 3 3>; + interrupt-names = "rx_hp", "rx_lp"; + interrupt-parent = <&pruss1_intc>; + + pinctrl-0 = <&pruss1_eth_default>; + pinctrl-names = "default"; + + ethernet-ports { + #address-cells = <1>; + #size-cells = <0>; + pruss1_emac0: ethernet-port@0 { + reg = <0>; + phy-handle = <&pruss1_eth0_phy>; + phy-mode = "mii"; + interrupts = <20 2 2>, <26 6 6>, <23 6 6>; + interrupt-names = "rx", "emac_ptp_tx", + "hsr_ptp_tx"; + /* Filled in by bootloader */ + local-mac-address = [00 00 00 00 00 00]; + }; + + pruss1_emac1: ethernet-port@1 { + reg = <1>; + phy-handle = <&pruss1_eth1_phy>; + phy-mode = "mii"; + interrupts = <21 3 3>, <27 9 5>, <24 9 5>; + interrupt-names = "rx", "emac_ptp_tx", + "hsr_ptp_tx"; + /* Filled in by bootloader */ + local-mac-address = [00 00 00 00 00 00]; + }; + }; + }; }; &am43xx_pinmux {
@@ -303,6 +345,52 @@ AM4372_IOPAD(0x94c, PIN_INPUT_PULLDOWN | MUX_MODE7) >; }; + pruss1_mdio_default: pruss1-mdio-default { + pinctrl-single,pins = < + AM4372_IOPAD(0x88c, PIN_OUTPUT | MUX_MODE5) /* (A12) gpmc_clk.pr1_mdio_mdclk */ + AM4372_IOPAD(0xa70, PIN_INPUT | MUX_MODE8) /* (D24) xdma_event_intr0.pr1_mdio_data */ + AM4372_IOPAD(0xa00, PIN_INPUT_PULLUP | MUX_MODE7) /* (AD23) cam1_data6.gpio4[20] */ + >; + }; + + pruss1_eth_default: pruss1-eth-default { + pinctrl-single,pins = < + AM4372_IOPAD(0x8a0, PIN_INPUT | MUX_MODE2) /* (B22) dss_data0.pr1_mii_mt0_clk */ + AM4372_IOPAD(0x8b4, PIN_OUTPUT | MUX_MODE2) /* (B20) dss_data5.pr1_mii0_txd0 */ + AM4372_IOPAD(0x8b0, PIN_OUTPUT | MUX_MODE2) /* (A20) dss_data4.pr1_mii0_txd1 */ + AM4372_IOPAD(0x8ac, PIN_OUTPUT | MUX_MODE2) /* (C21) dss_data3.pr1_mii0_txd2 */ + AM4372_IOPAD(0x8a8, PIN_OUTPUT | MUX_MODE2) /* (B21) dss_data2.pr1_mii0_txd3 */ + AM4372_IOPAD(0x8cc, PIN_INPUT | MUX_MODE5) /* (B18) dss_data11.pr1_mii0_rxd0 */ + AM4372_IOPAD(0x8c8, PIN_INPUT | MUX_MODE5) /* (A18) dss_data10.pr1_mii0_rxd1 */ + AM4372_IOPAD(0x8c4, PIN_INPUT | MUX_MODE5) /* (B19) dss_data9.pr1_mii0_rxd2 */ + AM4372_IOPAD(0x8c0, PIN_INPUT | MUX_MODE5) /* (A19) dss_data8.pr1_mii0_rxd3 */ + AM4372_IOPAD(0x8a4, PIN_OUTPUT | MUX_MODE2) /* (A21) dss_data1.pr1_mii0_txen */ + AM4372_IOPAD(0x8d8, PIN_INPUT | MUX_MODE5) /* (C17) dss_data14.pr1_mii_mr0_clk */ + AM4372_IOPAD(0x8dc, PIN_INPUT | MUX_MODE5) /* (D17) dss_data15.pr1_mii0_rxdv */ + AM4372_IOPAD(0x8d4, PIN_INPUT | MUX_MODE5) /* (D19) dss_data13.pr1_mii0_rxer */ + AM4372_IOPAD(0x8d0, PIN_INPUT | MUX_MODE5) /* (C19) dss_data12.pr1_mii0_rxlink */ + AM4372_IOPAD(0xa40, PIN_INPUT | MUX_MODE5) /* (G20) gpio5_10.pr1_mii0_crs */ + AM4372_IOPAD(0xa38, PIN_INPUT | MUX_MODE5) /* (D25) gpio5_8.pr1_mii0_col */ + + AM4372_IOPAD(0x858, PIN_INPUT | MUX_MODE5) /* (E8) gpmc_a6.pr1_mii_mt1_clk */ + AM4372_IOPAD(0x854, PIN_OUTPUT | MUX_MODE5) /* (E7) gpmc_a5.pr1_mii1_txd0 */ + AM4372_IOPAD(0x850, PIN_OUTPUT | MUX_MODE5) /* (D7) gpmc_a4.pr1_mii1_txd1 */ + AM4372_IOPAD(0x84c, PIN_OUTPUT | MUX_MODE5) /* (A4) gpmc_a3.pr1_mii1_txd2 */ + AM4372_IOPAD(0x848, PIN_OUTPUT | MUX_MODE5) /* (C6) gpmc_a2.pr1_mii1_txd3 */ + AM4372_IOPAD(0x86c, PIN_INPUT | MUX_MODE5) /* (D8) gpmc_a11.pr1_mii1_rxd0 */ + AM4372_IOPAD(0x868, PIN_INPUT | MUX_MODE5) /* (G8) gpmc_a10.pr1_mii1_rxd1 */ + AM4372_IOPAD(0x864, PIN_INPUT | MUX_MODE5) /* (B4) gpmc_a9.pr1_mii1_rxd2 */ + AM4372_IOPAD(0x860, PIN_INPUT | MUX_MODE5) /* (F7) gpmc_a8.pr1_mii1_rxd3 */ + AM4372_IOPAD(0x840, PIN_OUTPUT | MUX_MODE5) /* (C3) gpmc_a0.pr1_mii1_txen */ + AM4372_IOPAD(0x85c, PIN_INPUT | MUX_MODE5) /* (F6) gpmc_a7.pr1_mii_mr1_clk */ + AM4372_IOPAD(0x844, PIN_INPUT | MUX_MODE5) /* (C5) gpmc_a1.pr1_mii1_rxdv */ + AM4372_IOPAD(0x874, PIN_INPUT | MUX_MODE5) /* (B3) gpmc_wpn.pr1_mii1_rxer */ + AM4372_IOPAD(0xa4c, PIN_INPUT | MUX_MODE5) /* (E24) gpio5_13.pr1_mii1_rxlink */ + AM4372_IOPAD(0xa44, PIN_INPUT | MUX_MODE5) /* (F23) gpio5_11.pr1_mii1_crs */ + AM4372_IOPAD(0x878, PIN_INPUT | MUX_MODE5) /* (A3) gpmc_be1n.pr1_mii1_col */ + >; + }; + qspi_pins_default: qspi-default-pins { pinctrl-single,pins = < AM4372_IOPAD(0x87c, PIN_OUTPUT_PULLUP | MUX_MODE3) /* gpmc_csn0.qspi_csn */
@@ -539,5 +627,18 @@ opp-100-600000000 { }; &pruss1_mdio { - status = "disabled"; + pinctrl-0 = <&pruss1_mdio_default>; + pinctrl-names = "default"; + status = "okay"; + + reset-gpios = <&gpio4 20 GPIO_ACTIVE_LOW>; + reset-delay-us = <2>; /* PHY datasheet states 1uS min */ + + pruss1_eth0_phy: ethernet-phy@0 { + reg = <0>; + }; + + pruss1_eth1_phy: ethernet-phy@1 { + reg = <1>; + }; };
--
2.43.0