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linux-zen-desktop/Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie-ep.yaml

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2023-08-30 17:31:07 +02:00
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pci/nvidia,tegra194-pcie-ep.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: NVIDIA Tegra194 (and later) PCIe Endpoint controller (Synopsys DesignWare Core based)
maintainers:
- Thierry Reding <thierry.reding@gmail.com>
- Jon Hunter <jonathanh@nvidia.com>
- Vidya Sagar <vidyas@nvidia.com>
description: |
This PCIe controller is based on the Synopsys DesignWare PCIe IP and thus
inherits all the common properties defined in snps,dw-pcie-ep.yaml. Some
of the controller instances are dual mode; they can work either in Root
Port mode or Endpoint mode but one at a time.
On Tegra194, controllers C0, C4 and C5 support Endpoint mode.
On Tegra234, controllers C5, C6, C7 and C10 support Endpoint mode.
Note: On Tegra194's P2972-0000 platform, only C5 controller can be enabled to
operate in the Endpoint mode because of the way the platform is designed.
properties:
compatible:
enum:
- nvidia,tegra194-pcie-ep
- nvidia,tegra234-pcie-ep
reg:
items:
- description: controller's application logic registers
- description: iATU and DMA registers. This is where the iATU (internal
Address Translation Unit) registers of the PCIe core are made
available for software access.
- description: aperture where the Root Port's own configuration
registers are available.
- description: aperture used to map the remote Root Complex address space
reg-names:
items:
- const: appl
- const: atu_dma
- const: dbi
- const: addr_space
interrupts:
items:
- description: controller interrupt
interrupt-names:
items:
- const: intr
clocks:
items:
- description: module clock
clock-names:
items:
- const: core
resets:
items:
- description: APB bus interface reset
- description: module reset
reset-names:
items:
- const: apb
- const: core
reset-gpios:
description: Must contain a phandle to a GPIO controller followed by GPIO
that is being used as PERST input signal. Please refer to pci.txt.
phys:
minItems: 1
maxItems: 8
phy-names:
minItems: 1
items:
- const: p2u-0
- const: p2u-1
- const: p2u-2
- const: p2u-3
- const: p2u-4
- const: p2u-5
- const: p2u-6
- const: p2u-7
power-domains:
maxItems: 1
description: |
A phandle to the node that controls power to the respective PCIe
controller and a specifier name for the PCIe controller.
Tegra194 specifiers are defined in "include/dt-bindings/power/tegra194-powergate.h"
Tegra234 specifiers are defined in "include/dt-bindings/power/tegra234-powergate.h"
interconnects:
items:
- description: memory read client
- description: memory write client
interconnect-names:
items:
- const: dma-mem # read
- const: write
dma-coherent: true
nvidia,bpmp:
$ref: /schemas/types.yaml#/definitions/phandle-array
description: |
Must contain a pair of phandles to BPMP controller node followed by
controller ID. Following are the controller IDs for each controller:
Tegra194
0: C0
1: C1
2: C2
3: C3
4: C4
5: C5
Tegra234
0 : C0
1 : C1
2 : C2
3 : C3
4 : C4
5 : C5
6 : C6
7 : C7
8 : C8
9 : C9
10: C10
items:
- items:
- description: phandle to BPMP controller node
- description: PCIe controller ID
maximum: 10
nvidia,aspm-cmrt-us:
description: Common Mode Restore Time for proper operation of ASPM to be
specified in microseconds
nvidia,aspm-pwr-on-t-us:
description: Power On time for proper operation of ASPM to be specified in
microseconds
nvidia,aspm-l0s-entrance-latency-us:
description: ASPM L0s entrance latency to be specified in microseconds
vddio-pex-ctl-supply:
description: A phandle to the regulator supply for PCIe side band signals
nvidia,refclk-select-gpios:
maxItems: 1
description: GPIO used to enable REFCLK to controller from the host
nvidia,enable-ext-refclk:
description: |
This boolean property needs to be present if the controller is configured
to receive Reference Clock from the host.
NOTE: This is applicable only for Tegra234.
$ref: /schemas/types.yaml#/definitions/flag
nvidia,enable-srns:
description: |
This boolean property needs to be present if the controller is
configured to operate in SRNS (Separate Reference Clocks with No
Spread-Spectrum Clocking). NOTE: This is applicable only for
Tegra234.
$ref: /schemas/types.yaml#/definitions/flag
allOf:
- $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
unevaluatedProperties: false
required:
- interrupts
- interrupt-names
- clocks
- clock-names
- resets
- reset-names
- power-domains
- reset-gpios
- vddio-pex-ctl-supply
- num-lanes
- phys
- phy-names
- nvidia,bpmp
examples:
- |
#include <dt-bindings/clock/tegra194-clock.h>
#include <dt-bindings/gpio/tegra194-gpio.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/power/tegra194-powergate.h>
#include <dt-bindings/reset/tegra194-reset.h>
bus@0 {
#address-cells = <2>;
#size-cells = <2>;
ranges = <0x0 0x0 0x0 0x8 0x0>;
pcie-ep@141a0000 {
compatible = "nvidia,tegra194-pcie-ep";
reg = <0x00 0x141a0000 0x0 0x00020000>, /* appl registers (128K) */
<0x00 0x3a040000 0x0 0x00040000>, /* iATU_DMA reg space (256K) */
<0x00 0x3a080000 0x0 0x00040000>, /* DBI reg space (256K) */
<0x1c 0x00000000 0x4 0x00000000>; /* Address Space (16G) */
reg-names = "appl", "atu_dma", "dbi", "addr_space";
interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
interrupt-names = "intr";
clocks = <&bpmp TEGRA194_CLK_PEX1_CORE_5>;
clock-names = "core";
resets = <&bpmp TEGRA194_RESET_PEX1_CORE_5_APB>,
<&bpmp TEGRA194_RESET_PEX1_CORE_5>;
reset-names = "apb", "core";
power-domains = <&bpmp TEGRA194_POWER_DOMAIN_PCIEX8A>;
pinctrl-names = "default";
pinctrl-0 = <&clkreq_c5_bi_dir_state>;
nvidia,bpmp = <&bpmp 5>;
nvidia,aspm-cmrt-us = <60>;
nvidia,aspm-pwr-on-t-us = <20>;
nvidia,aspm-l0s-entrance-latency-us = <3>;
vddio-pex-ctl-supply = <&vdd_1v8ao>;
reset-gpios = <&gpio TEGRA194_MAIN_GPIO(GG, 1) GPIO_ACTIVE_LOW>;
nvidia,refclk-select-gpios = <&gpio_aon TEGRA194_AON_GPIO(AA, 5)
GPIO_ACTIVE_HIGH>;
num-lanes = <8>;
phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>,
<&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>,
<&p2u_nvhs_6>, <&p2u_nvhs_7>;
phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4",
"p2u-5", "p2u-6", "p2u-7";
};
};
- |
#include <dt-bindings/clock/tegra234-clock.h>
#include <dt-bindings/gpio/tegra234-gpio.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/power/tegra234-powergate.h>
#include <dt-bindings/reset/tegra234-reset.h>
bus@0 {
#address-cells = <2>;
#size-cells = <2>;
ranges = <0x0 0x0 0x0 0x8 0x0>;
pcie-ep@141a0000 {
compatible = "nvidia,tegra234-pcie-ep";
power-domains = <&bpmp TEGRA234_POWER_DOMAIN_PCIEX8A>;
reg = <0x00 0x141a0000 0x0 0x00020000>, /* appl registers (128K) */
<0x00 0x3a040000 0x0 0x00040000>, /* iATU_DMA reg space (256K) */
<0x00 0x3a080000 0x0 0x00040000>, /* DBI reg space (256K) */
<0x27 0x40000000 0x4 0x00000000>; /* Address Space (16G) */
reg-names = "appl", "atu_dma", "dbi", "addr_space";
interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>; /* controller interrupt */
interrupt-names = "intr";
clocks = <&bpmp TEGRA234_CLK_PEX1_C5_CORE>;
clock-names = "core";
resets = <&bpmp TEGRA234_RESET_PEX1_CORE_5_APB>,
<&bpmp TEGRA234_RESET_PEX1_CORE_5>;
reset-names = "apb", "core";
nvidia,bpmp = <&bpmp 5>;
nvidia,enable-ext-refclk;
nvidia,aspm-cmrt-us = <60>;
nvidia,aspm-pwr-on-t-us = <20>;
nvidia,aspm-l0s-entrance-latency-us = <3>;
vddio-pex-ctl-supply = <&p3701_vdd_1v8_ls>;
reset-gpios = <&gpio TEGRA234_MAIN_GPIO(AF, 1) GPIO_ACTIVE_LOW>;
nvidia,refclk-select-gpios = <&gpio_aon
TEGRA234_AON_GPIO(AA, 4)
GPIO_ACTIVE_HIGH>;
num-lanes = <8>;
phys = <&p2u_nvhs_0>, <&p2u_nvhs_1>, <&p2u_nvhs_2>,
<&p2u_nvhs_3>, <&p2u_nvhs_4>, <&p2u_nvhs_5>,
<&p2u_nvhs_6>, <&p2u_nvhs_7>;
phy-names = "p2u-0", "p2u-1", "p2u-2", "p2u-3", "p2u-4",
"p2u-5", "p2u-6", "p2u-7";
};
};