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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-04 20:11:25 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-04 20:11:25 -0700 |
commit | 571d54ed91c0fae174d933683c0c2e11c84843d9 (patch) | |
tree | fedc4c05816f9adff472889fca5ba13039683121 /Documentation/devicetree/bindings/mailbox/fsl,mu.yaml | |
parent | 9d71d3cd9ef040c284506648285915e9ba4d08c4 (diff) | |
parent | 8211d1e83aded34631aa87fa37f97d7bb712e925 (diff) |
Merge tag 'devicetree-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree updates from Rob Herring:
- Convert various DT (non-binding) doc files to ReST
- Various improvements to device link code
- Fix __of_attach_node_sysfs refcounting bug
- Add support for 'memory-region-names' with reserved-memory binding
- Vendor prefixes for Protonic Holland, BeagleBoard.org, Alps, Check
Point, Würth Elektronik, U-Boot, Vaisala, Baikal Electronics,
Shanghai Awinic Technology Co., MikroTik, Silex Insight
- A bunch more binding conversions to DT schema. Only 3K to go.
- Add a minimum version check for schema tools
- Treewide dropping of 'allOf' usage with schema references. Not needed
in new json-schema spec.
- Some formatting clean-ups of schemas
* tag 'devicetree-for-5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (194 commits)
dt-bindings: clock: Add documentation for X1830 bindings.
dt-bindings: mailbox: Convert imx mu to json-schema
dt-bindings: power: Convert imx gpcv2 to json-schema
dt-bindings: power: Convert imx gpc to json-schema
dt-bindings: Merge gpio-usb-b-connector with usb-connector
dt-bindings: timer: renesas: cmt: Convert to json-schema
dt-bindings: clock: Convert i.MX8QXP LPCG to json-schema
dt-bindings: timer: Convert i.MX GPT to json-schema
dt-bindings: thermal: rcar-thermal: Add device tree support for r8a7742
dt-bindings: serial: Add binding for UART pin swap
dt-bindings: geni-se: Add interconnect binding for GENI QUP
dt-bindings: geni-se: Convert QUP geni-se bindings to YAML
dt-bindings: vendor-prefixes: Add Silex Insight vendor prefix
dt-bindings: input: touchscreen: edt-ft5x06: change reg property
dt-bindings: usb: qcom,dwc3: Introduce interconnect properties for Qualcomm DWC3 driver
dt-bindings: timer: renesas: mtu2: Convert to json-schema
of/fdt: Remove redundant kbasename function call
dt-bindings: clock: Convert i.MX1 clock to json-schema
dt-bindings: clock: Convert i.MX21 clock to json-schema
dt-bindings: clock: Convert i.MX25 clock to json-schema
...
Diffstat (limited to 'Documentation/devicetree/bindings/mailbox/fsl,mu.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/mailbox/fsl,mu.yaml | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml new file mode 100644 index 000000000000..3b35eb5ac3f9 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mailbox/fsl,mu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP i.MX Messaging Unit (MU) + +maintainers: + - Dong Aisheng <aisheng.dong@nxp.com> + +description: | + The Messaging Unit module enables two processors within the SoC to + communicate and coordinate by passing messages (e.g. data, status + and control) through the MU interface. The MU also provides the ability + for one processor to signal the other processor using interrupts. + + Because the MU manages the messaging between processors, the MU uses + different clocks (from each side of the different peripheral buses). + Therefore, the MU must synchronize the accesses from one side to the + other. The MU accomplishes synchronization using two sets of matching + registers (Processor A-facing, Processor B-facing). + +properties: + compatible: + oneOf: + - const: fsl,imx6sx-mu + - const: fsl,imx7ulp-mu + - const: fsl,imx8-mu-scu + - items: + - enum: + - fsl,imx7s-mu + - fsl,imx8mq-mu + - fsl,imx8mm-mu + - fsl,imx8mn-mu + - fsl,imx8mp-mu + - fsl,imx8qxp-mu + - const: fsl,imx6sx-mu + - description: To communicate with i.MX8 SCU with fast IPC + items: + - const: fsl,imx8qxp-mu + - const: fsl,imx8-mu-scu + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + "#mbox-cells": + description: | + <&phandle type channel> + phandle : Label name of controller + type : Channel type + channel : Channel number + + This MU support 4 type of unidirectional channels, each type + has 4 channels. A total of 16 channels. Following types are + supported: + 0 - TX channel with 32bit transmit register and IRQ transmit + acknowledgment support. + 1 - RX channel with 32bit receive register and IRQ support + 2 - TX doorbell channel. Without own register and no ACK support. + 3 - RX doorbell channel. + const: 2 + + clocks: + maxItems: 1 + + fsl,mu-side-b: + description: boolean, if present, means it is for side B MU. + type: boolean + +required: + - compatible + - reg + - interrupts + - "#mbox-cells" + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + mailbox@5d1b0000 { + compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu"; + reg = <0x5d1b0000 0x10000>; + interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>; + #mbox-cells = <2>; + }; |