# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/remoteproc/ti,pru-rproc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: TI Programmable Realtime Unit (PRU) cores
maintainers:
- Suman Anna <s-anna@ti.com>
description: |
Each Programmable Real-Time Unit and Industrial Communication Subsystem
(PRU-ICSS or PRUSS) has two 32-bit load/store RISC CPU cores called
Programmable Real-Time Units (PRUs), each represented by a node. Each PRU
core has a dedicated Instruction RAM, Control and Debug register sets, and
use the Data RAMs present within the PRU-ICSS for code execution.
The K3 SoCs containing ICSSG v1.0 (eg: AM65x SR1.0) also have two Auxiliary
PRU cores called RTUs with slightly different IP integration. The K3 SoCs
containing the revised ICSSG v1.1 (eg: J721E, AM65x SR2.0) have an extra two
auxiliary Transmit PRU cores called Tx_PRUs that augment the PRUs. Each RTU
or Tx_PRU core can also be used independently like a PRU, or alongside a
corresponding PRU core to provide/implement auxiliary functionality/support.
Each PRU, RTU or Tx_PRU core node should be defined as a child node of the
corresponding PRU-ICSS node. Each node can optionally be rendered inactive by
using the standard DT string property, "status".
Please see the overall PRU-ICSS bindings document for additional details
including a complete example,
Documentation/devicetree/bindings/soc/ti/ti,pruss.yaml
properties:
compatible:
enum:
- ti,am3356-pru # for AM335x SoC family (AM3356+ SoCs only)
- ti,am4376-pru # for AM437x SoC family (AM4376+ SoCs only)
- ti,am5728-pru # for AM57xx SoC family
- ti,am625-pru # for PRUs in K3 AM62x SoC family
- ti,am642-pru # for PRUs in K3 AM64x SoC family
- ti,am642-rtu # for RTUs in K3 AM64x SoC family
- ti,am642-tx-pru # for Tx_PRUs in K3 AM64x SoC family
- ti,am654-pru # for PRUs in K3 AM65x SoC family
- ti,am654-rtu # for RTUs in K3 AM65x SoC family
- ti,am654-tx-pru # for Tx_PRUs in K3 AM65x SR2.0 SoCs
- ti,j721e-pru # for PRUs in K3 J721E SoC family
- ti,j721e-rtu # for RTUs in K3 J721E SoC family
- ti,j721e-tx-pru # for Tx_PRUs in K3 J721E SoC family
- ti,k2g-pru # for 66AK2G SoC family
reg:
items:
- description: Address and Size of the PRU Instruction RAM
- description: Address and Size of the PRU CTRL sub-module registers
- description: Address and Size of the PRU Debug sub-module registers
reg-names:
items:
- const: iram
- const: control
- const: debug
firmware-name:
description: |
Should contain the name of the default firmware image
file located on the firmware search path.
if:
properties:
compatible:
enum:
- ti,am654-rtu
- ti,j721e-rtu
- ti,am642-rtu
then:
properties:
$nodename:
pattern: "^rtu@[0-9a-f]+$"
else:
if:
properties:
compatible:
enum:
- ti,am654-tx-pru
- ti,j721e-tx-pru
- ti,am642-tx-pru
then:
properties:
$nodename:
pattern: "^txpru@[0-9a-f]+"
else:
properties:
$nodename:
pattern: "^pru@[0-9a-f]+$"
required:
- compatible
- reg
- reg-names
- firmware-name
additionalProperties: false
examples:
- |
/* AM33xx PRU-ICSS */
pruss_tm: target-module@300000 { /* 0x4a300000, ap 9 04.0 */
compatible = "ti,sysc-pruss", "ti,sysc";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x300000 0x80000>;
pruss: pruss@0 {
compatible = "ti,am3356-pruss";
reg = <0x0 0x80000>;
#address-cells = <1>;
#size-cells = <1>;
ranges;
pruss_mem: memories@0 {
reg = <0x0 0x2000>,
<0x2000 0x2000>,
<0x10000 0x3000>;
reg-names = "dram0", "dram1", "shrdram2";
};
pru0: pru@34000 {
compatible = "ti,am3356-pru";
reg = <0x34000 0x2000>,
<0x22000 0x400>,
<0x22400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am335x-pru0-fw";
};
pru1: pru@38000 {
compatible = "ti,am3356-pru";
reg = <0x38000 0x2000>,
<0x24000 0x400>,
<0x24400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am335x-pru1-fw";
};
};
};
- |
/* AM65x SR2.0 ICSSG */
#include <dt-bindings/soc/ti,sci_pm_domain.h>
icssg0: icssg@b000000 {
compatible = "ti,am654-icssg";
reg = <0xb000000 0x80000>;
power-domains = <&k3_pds 62 TI_SCI_PD_EXCLUSIVE>;
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0xb000000 0x80000>;
icssg0_mem: memories@0 {
reg = <0x0 0x2000>,
<0x2000 0x2000>,
<0x10000 0x10000>;
reg-names = "dram0", "dram1", "shrdram2";
};
pru0_0: pru@34000 {
compatible = "ti,am654-pru";
reg = <0x34000 0x4000>,
<0x22000 0x100>,
<0x22400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am65x-pru0_0-fw";
};
rtu0_0: rtu@4000 {
compatible = "ti,am654-rtu";
reg = <0x4000 0x2000>,
<0x23000 0x100>,
<0x23400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am65x-rtu0_0-fw";
};
tx_pru0_0: txpru@a000 {
compatible = "ti,am654-tx-pru";
reg = <0xa000 0x1800>,
<0x25000 0x100>,
<0x25400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am65x-txpru0_0-fw";
};
pru0_1: pru@38000 {
compatible = "ti,am654-pru";
reg = <0x38000 0x4000>,
<0x24000 0x100>,
<0x24400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am65x-pru0_1-fw";
};
rtu0_1: rtu@6000 {
compatible = "ti,am654-rtu";
reg = <0x6000 0x2000>,
<0x23800 0x100>,
<0x23c00 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am65x-rtu0_1-fw";
};
tx_pru0_1: txpru@c000 {
compatible = "ti,am654-tx-pru";
reg = <0xc000 0x1800>,
<0x25800 0x100>,
<0x25c00 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am65x-txpru0_1-fw";
};
};