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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/can/ti,tcan4x5x.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Texas Instruments TCAN4x5x CAN Controller
maintainers:
- Marc Kleine-Budde <mkl@pengutronix.de>
properties:
compatible:
oneOf:
- items:
- enum:
- ti,tcan4552
- ti,tcan4553
- const: ti,tcan4x5x
- const: ti,tcan4x5x
reg:
maxItems: 1
interrupts:
maxItems: 1
description: The GPIO parent interrupt.
clocks:
maxItems: 1
clock-names:
items:
- const: cclk
reset-gpios:
description: Hardwired output GPIO. If not defined then software reset.
maxItems: 1
device-state-gpios:
description:
Input GPIO that indicates if the device is in a sleep state or if the
device is active. Not available with tcan4552/4553.
maxItems: 1
device-wake-gpios:
description:
Wake up GPIO to wake up the TCAN device.
Not available with tcan4552/4553.
maxItems: 1
bosch,mram-cfg:
description: |
Message RAM configuration data.
Multiple M_CAN instances can share the same Message RAM
and each element(e.g Rx FIFO or Tx Buffer and etc) number
in Message RAM is also configurable, so this property is
telling driver how the shared or private Message RAM are
used by this M_CAN controller.
The format should be as follows:
<offset sidf_elems xidf_elems rxf0_elems rxf1_elems rxb_elems txe_elems txb_elems>
The 'offset' is an address offset of the Message RAM where
the following elements start from. This is usually set to
0x0 if you're using a private Message RAM. The remain cells
are used to specify how many elements are used for each FIFO/Buffer.
M_CAN includes the following elements according to user manual:
11-bit Filter 0-128 elements / 0-128 words
29-bit Filter 0-64 elements / 0-128 words
Rx FIFO 0 0-64 elements / 0-1152 words
Rx FIFO 1 0-64 elements / 0-1152 words
Rx Buffers 0-64 elements / 0-1152 words
Tx Event FIFO 0-32 elements / 0-64 words
Tx Buffers 0-32 elements / 0-576 words
Please refer to 2.4.1 Message RAM Configuration in Bosch
M_CAN user manual for details.
$ref: /schemas/types.yaml#/definitions/int32-array
items:
- description: The 'offset' is an address offset of the Message RAM where
the following elements start from. This is usually set to 0x0 if
you're using a private Message RAM.
default: 0
- description: 11-bit Filter 0-128 elements / 0-128 words
minimum: 0
maximum: 128
- description: 29-bit Filter 0-64 elements / 0-128 words
minimum: 0
maximum: 64
- description: Rx FIFO 0 0-64 elements / 0-1152 words
minimum: 0
maximum: 64
- description: Rx FIFO 1 0-64 elements / 0-1152 words
minimum: 0
maximum: 64
- description: Rx Buffers 0-64 elements / 0-1152 words
minimum: 0
maximum: 64
- description: Tx Event FIFO 0-32 elements / 0-64 words
minimum: 0
maximum: 32
- description: Tx Buffers 0-32 elements / 0-576 words
minimum: 0
maximum: 32
minItems: 1
spi-max-frequency:
description:
Must be half or less of "clocks" frequency.
maximum: 18000000
ti,nwkrq-voltage-vio:
type: boolean
description:
nWKRQ Pin GPO buffer voltage configuration.
Set nWKRQ to use VIO voltage rail.
When not set nWKRQ will use internal voltage rail.
wakeup-source:
$ref: /schemas/types.yaml#/definitions/flag
description:
Enable CAN remote wakeup.
allOf:
- $ref: can-controller.yaml#
- $ref: /schemas/spi/spi-peripheral-props.yaml#
- if:
properties:
compatible:
contains:
enum:
- ti,tcan4552
- ti,tcan4553
then:
properties:
device-state-gpios: false
device-wake-gpios: false
required:
- compatible
- reg
- interrupts
- clocks
- clock-names
- bosch,mram-cfg
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
can@0 {
compatible = "ti,tcan4x5x";
reg = <0>;
clocks = <&can0_osc>;
clock-names = "cclk";
pinctrl-names = "default";
pinctrl-0 = <&can0_pins>;
spi-max-frequency = <10000000>;
bosch,mram-cfg = <0x0 0 0 16 0 0 1 1>;
interrupt-parent = <&gpio1>;
interrupts = <14 IRQ_TYPE_LEVEL_LOW>;
device-state-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
device-wake-gpios = <&gpio1 15 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
ti,nwkrq-voltage-vio;
wakeup-source;
};
};
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
can@0 {
compatible = "ti,tcan4552", "ti,tcan4x5x";
reg = <0>;
clocks = <&can0_osc>;
clock-names = "cclk";
pinctrl-names = "default";
pinctrl-0 = <&can0_pins>;
spi-max-frequency = <10000000>;
bosch,mram-cfg = <0x0 0 0 16 0 0 1 1>;
interrupt-parent = <&gpio1>;
interrupts = <14 IRQ_TYPE_LEVEL_LOW>;
reset-gpios = <&gpio1 27 GPIO_ACTIVE_HIGH>;
wakeup-source;
};
};
|
