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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/soc/fsl/cpm_qe/fsl,cpm1-scc-qmc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: PowerQUICC CPM QUICC Multichannel Controller (QMC)
maintainers:
- Herve Codina <herve.codina@bootlin.com>
description:
The QMC (QUICC Multichannel Controller) emulates up to 64 channels within one
serial controller using the same TDM physical interface routed from TSA.
properties:
compatible:
items:
- enum:
- fsl,mpc885-scc-qmc
- fsl,mpc866-scc-qmc
- const: fsl,cpm1-scc-qmc
reg:
items:
- description: SCC (Serial communication controller) register base
- description: SCC parameter ram base
- description: Dual port ram base
reg-names:
items:
- const: scc_regs
- const: scc_pram
- const: dpram
interrupts:
maxItems: 1
description: SCC interrupt line in the CPM interrupt controller
fsl,tsa-serial:
$ref: /schemas/types.yaml#/definitions/phandle-array
items:
- items:
- description: phandle to TSA node
- enum: [1, 2, 3]
description: |
TSA serial interface (dt-bindings/soc/cpm1-fsl,tsa.h defines these
values)
- 1: SCC2
- 2: SCC3
- 3: SCC4
description:
Should be a phandle/number pair. The phandle to TSA node and the TSA
serial interface to use.
'#address-cells':
const: 1
'#size-cells':
const: 0
patternProperties:
'^channel@([0-9]|[1-5][0-9]|6[0-3])$':
description:
A channel managed by this controller
type: object
additionalProperties: false
properties:
reg:
minimum: 0
maximum: 63
description:
The channel number
fsl,operational-mode:
$ref: /schemas/types.yaml#/definitions/string
enum: [transparent, hdlc]
default: transparent
description: |
The channel operational mode
- hdlc: The channel handles HDLC frames
- transparent: The channel handles raw data without any processing
fsl,reverse-data:
$ref: /schemas/types.yaml#/definitions/flag
description:
The bit order as seen on the channels is reversed,
transmitting/receiving the MSB of each octet first.
This flag is used only in 'transparent' mode.
fsl,tx-ts-mask:
$ref: /schemas/types.yaml#/definitions/uint64
description:
Channel assigned Tx time-slots within the Tx time-slots routed by the
TSA to this cell.
fsl,rx-ts-mask:
$ref: /schemas/types.yaml#/definitions/uint64
description:
Channel assigned Rx time-slots within the Rx time-slots routed by the
TSA to this cell.
compatible:
items:
- enum:
- fsl,mpc885-scc-qmc-hdlc
- fsl,mpc866-scc-qmc-hdlc
- const: fsl,cpm1-scc-qmc-hdlc
- const: fsl,qmc-hdlc
fsl,framer:
$ref: /schemas/types.yaml#/definitions/phandle
description:
phandle to the framer node. The framer is in charge of an E1/T1 line
interface connected to the TDM bus. It can be used to get the E1/T1 line
status such as link up/down.
allOf:
- if:
properties:
compatible:
not:
contains:
const: fsl,qmc-hdlc
then:
properties:
fsl,framer: false
required:
- reg
- fsl,tx-ts-mask
- fsl,rx-ts-mask
required:
- compatible
- reg
- reg-names
- interrupts
- fsl,tsa-serial
- '#address-cells'
- '#size-cells'
additionalProperties: false
examples:
- |
#include <dt-bindings/soc/cpm1-fsl,tsa.h>
qmc@a60 {
compatible = "fsl,mpc885-scc-qmc", "fsl,cpm1-scc-qmc";
reg = <0xa60 0x20>,
<0x3f00 0xc0>,
<0x2000 0x1000>;
reg-names = "scc_regs", "scc_pram", "dpram";
interrupts = <27>;
interrupt-parent = <&CPM_PIC>;
#address-cells = <1>;
#size-cells = <0>;
fsl,tsa-serial = <&tsa FSL_CPM_TSA_SCC4>;
channel@16 {
/* Ch16 : First 4 even TS from all routed from TSA */
reg = <16>;
fsl,operational-mode = "transparent";
fsl,reverse-data;
fsl,tx-ts-mask = <0x00000000 0x000000aa>;
fsl,rx-ts-mask = <0x00000000 0x000000aa>;
};
channel@17 {
/* Ch17 : First 4 odd TS from all routed from TSA */
reg = <17>;
fsl,operational-mode = "transparent";
fsl,reverse-data;
fsl,tx-ts-mask = <0x00000000 0x00000055>;
fsl,rx-ts-mask = <0x00000000 0x00000055>;
};
channel@19 {
/* Ch19 : 8 TS (TS 8..15) from all routed from TSA */
compatible = "fsl,mpc885-scc-qmc-hdlc",
"fsl,cpm1-scc-qmc-hdlc",
"fsl,qmc-hdlc";
reg = <19>;
fsl,operational-mode = "hdlc";
fsl,tx-ts-mask = <0x00000000 0x0000ff00>;
fsl,rx-ts-mask = <0x00000000 0x0000ff00>;
fsl,framer = <&framer>;
};
};
|
