93 lines
2.4 KiB
YAML
93 lines
2.4 KiB
YAML
|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
|
||
|
|
%YAML 1.2
|
||
|
|
---
|
||
|
|
$id: http://devicetree.org/schemas/net/qcom,bam-dmux.yaml#
|
||
|
|
$schema: http://devicetree.org/meta-schemas/core.yaml#
|
||
|
|
|
||
|
|
title: Qualcomm BAM Data Multiplexer
|
||
|
|
|
||
|
|
maintainers:
|
||
|
|
- Stephan Gerhold <stephan@gerhold.net>
|
||
|
|
|
||
|
|
description: |
|
||
|
|
The BAM Data Multiplexer provides access to the network data channels
|
||
|
|
of modems integrated into many older Qualcomm SoCs, e.g. Qualcomm MSM8916
|
||
|
|
or MSM8974. It is built using a simple protocol layer on top of a DMA engine
|
||
|
|
(Qualcomm BAM DMA) and bidirectional interrupts to coordinate power control.
|
||
|
|
|
||
|
|
Note that this schema does not directly describe a hardware block but rather
|
||
|
|
a firmware convention that combines several other hardware blocks (such as the
|
||
|
|
DMA engine). As such it is specific to a firmware version, not a particular
|
||
|
|
SoC or hardware version.
|
||
|
|
|
||
|
|
properties:
|
||
|
|
compatible:
|
||
|
|
const: qcom,bam-dmux
|
||
|
|
|
||
|
|
interrupts:
|
||
|
|
description:
|
||
|
|
Interrupts used by the modem to signal the AP.
|
||
|
|
Both interrupts must be declared as IRQ_TYPE_EDGE_BOTH.
|
||
|
|
items:
|
||
|
|
- description: Power control
|
||
|
|
- description: Power control acknowledgment
|
||
|
|
|
||
|
|
interrupt-names:
|
||
|
|
items:
|
||
|
|
- const: pc
|
||
|
|
- const: pc-ack
|
||
|
|
|
||
|
|
qcom,smem-states:
|
||
|
|
$ref: /schemas/types.yaml#/definitions/phandle-array
|
||
|
|
description: State bits used by the AP to signal the modem.
|
||
|
|
items:
|
||
|
|
- description: Power control
|
||
|
|
- description: Power control acknowledgment
|
||
|
|
|
||
|
|
qcom,smem-state-names:
|
||
|
|
description: Names for the state bits used by the AP to signal the modem.
|
||
|
|
items:
|
||
|
|
- const: pc
|
||
|
|
- const: pc-ack
|
||
|
|
|
||
|
|
dmas:
|
||
|
|
items:
|
||
|
|
- description: TX DMA channel phandle
|
||
|
|
- description: RX DMA channel phandle
|
||
|
|
|
||
|
|
dma-names:
|
||
|
|
items:
|
||
|
|
- const: tx
|
||
|
|
- const: rx
|
||
|
|
|
||
|
|
required:
|
||
|
|
- compatible
|
||
|
|
- interrupts
|
||
|
|
- interrupt-names
|
||
|
|
- qcom,smem-states
|
||
|
|
- qcom,smem-state-names
|
||
|
|
- dmas
|
||
|
|
- dma-names
|
||
|
|
|
||
|
|
additionalProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
#include <dt-bindings/interrupt-controller/irq.h>
|
||
|
|
|
||
|
|
mpss: remoteproc {
|
||
|
|
bam-dmux {
|
||
|
|
compatible = "qcom,bam-dmux";
|
||
|
|
|
||
|
|
interrupt-parent = <&modem_smsm>;
|
||
|
|
interrupts = <1 IRQ_TYPE_EDGE_BOTH>, <11 IRQ_TYPE_EDGE_BOTH>;
|
||
|
|
interrupt-names = "pc", "pc-ack";
|
||
|
|
|
||
|
|
qcom,smem-states = <&apps_smsm 1>, <&apps_smsm 11>;
|
||
|
|
qcom,smem-state-names = "pc", "pc-ack";
|
||
|
|
|
||
|
|
dmas = <&bam_dmux_dma 4>, <&bam_dmux_dma 5>;
|
||
|
|
dma-names = "tx", "rx";
|
||
|
|
};
|
||
|
|
};
|