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Message-ID: <20250812181415.66923-1-robh@kernel.org>
Date: Tue, 12 Aug 2025 13:14:13 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Jassi Brar <jassisinghbrar@...il.com>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Ray Jui <rjui@...adcom.com>,
Scott Branden <sbranden@...adcom.com>,
Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Cc: linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] dt-bindings: mailbox: Convert brcm,iproc-flexrm-mbox to DT schema
Convert the Broadcom FlexRM Ring Manager binding to DT schema format.
It's a straightforward conversion.
Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
.../mailbox/brcm,iproc-flexrm-mbox.txt | 59 -----------------
.../mailbox/brcm,iproc-flexrm-mbox.yaml | 63 +++++++++++++++++++
2 files changed, 63 insertions(+), 59 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt
create mode 100644 Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.yaml
diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt b/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt
deleted file mode 100644
index bf0c998b8603..000000000000
--- a/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.txt
+++ /dev/null
@@ -1,59 +0,0 @@
-Broadcom FlexRM Ring Manager
-============================
-The Broadcom FlexRM ring manager provides a set of rings which can be
-used to submit work to offload engines. An SoC may have multiple FlexRM
-hardware blocks. There is one device tree entry per FlexRM block. The
-FlexRM driver will create a mailbox-controller instance for given FlexRM
-hardware block where each mailbox channel is a separate FlexRM ring.
-
-Required properties:
---------------------
-- compatible: Should be "brcm,iproc-flexrm-mbox"
-- reg: Specifies base physical address and size of the FlexRM
- ring registers
-- msi-parent: Phandles (and potential Device IDs) to MSI controllers
- The FlexRM engine will send MSIs (instead of wired
- interrupts) to CPU. There is one MSI for each FlexRM ring.
- Refer devicetree/bindings/interrupt-controller/msi.txt
-- #mbox-cells: Specifies the number of cells needed to encode a mailbox
- channel. This should be 3.
-
- The 1st cell is the mailbox channel number.
-
- The 2nd cell contains MSI completion threshold. This is the
- number of completion messages for which FlexRM will inject
- one MSI interrupt to CPU.
-
- The 3rd cell contains MSI timer value representing time for
- which FlexRM will wait to accumulate N completion messages
- where N is the value specified by 2nd cell above. If FlexRM
- does not get required number of completion messages in time
- specified by this cell then it will inject one MSI interrupt
- to CPU provided at least one completion message is available.
-
-Optional properties:
---------------------
-- dma-coherent: Present if DMA operations made by the FlexRM engine (such
- as DMA descriptor access, access to buffers pointed by DMA
- descriptors and read/write pointer updates to DDR) are
- cache coherent with the CPU.
-
-Example:
---------
-crypto_mbox: mbox@...00000 {
- compatible = "brcm,iproc-flexrm-mbox";
- reg = <0x67000000 0x200000>;
- msi-parent = <&gic_its 0x7f00>;
- #mbox-cells = <3>;
-};
-
-crypto@...c0000 {
- compatible = "brcm,spu2-v2-crypto";
- reg = <0x672c0000 0x1000>;
- mboxes = <&crypto_mbox 0 0x1 0xffff>,
- <&crypto_mbox 1 0x1 0xffff>,
- <&crypto_mbox 16 0x1 0xffff>,
- <&crypto_mbox 17 0x1 0xffff>,
- <&crypto_mbox 30 0x1 0xffff>,
- <&crypto_mbox 31 0x1 0xffff>;
-};
diff --git a/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.yaml b/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.yaml
new file mode 100644
index 000000000000..c801bd2e95f3
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/brcm,iproc-flexrm-mbox.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/brcm,iproc-flexrm-mbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom FlexRM Ring Manager
+
+maintainers:
+ - Ray Jui <rjui@...adcom.com>
+ - Scott Branden <sbranden@...adcom.com>
+
+description:
+ The Broadcom FlexRM ring manager provides a set of rings which can be used to
+ submit work to offload engines. An SoC may have multiple FlexRM hardware
+ blocks. There is one device tree entry per FlexRM block. The FlexRM driver
+ will create a mailbox-controller instance for given FlexRM hardware block
+ where each mailbox channel is a separate FlexRM ring.
+
+properties:
+ compatible:
+ const: brcm,iproc-flexrm-mbox
+
+ reg:
+ maxItems: 1
+
+ msi-parent:
+ maxItems: 1
+
+ '#mbox-cells':
+ description: >
+ The 1st cell is the mailbox channel number.
+
+ The 2nd cell contains MSI completion threshold. This is the number of
+ completion messages for which FlexRM will inject one MSI interrupt to CPU.
+
+ The 3rd cell contains MSI timer value representing time for which FlexRM
+ will wait to accumulate N completion messages where N is the value
+ specified by 2nd cell above. If FlexRM does not get required number of
+ completion messages in time specified by this cell then it will inject one
+ MSI interrupt to CPU provided at least one completion message is
+ available.
+ const: 3
+
+ dma-coherent: true
+
+required:
+ - compatible
+ - reg
+ - msi-parent
+ - '#mbox-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ mailbox@...00000 {
+ compatible = "brcm,iproc-flexrm-mbox";
+ reg = <0x67000000 0x200000>;
+ msi-parent = <&gic_its 0x7f00>;
+ #mbox-cells = <3>;
+ dma-coherent;
+ };
--
2.47.2
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