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Date: Mon, 24 Feb 2020 09:52:30 -0800
From: Ben Levinsky <ben.levinsky@...inx.com>
To: ohad@...ery.com, bjorn.andersson@...aro.org,
michal.simek@...inx.com, jollys@...inx.com, rajan.vaja@...inx.com,
robh+dt@...nel.org, mark.rutland@....com
Cc: linux-remoteproc@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Jason Wu <j.wu@...inx.com>,
Wendy Liang <jliang@...inx.com>
Subject: [PATCH 4/5] dt-bindings: remoteproc: Add documentation for ZynqMP R5 rproc bindings
From: Jason Wu <j.wu@...inx.com>
Add binding for ZynqMP R5 OpenAMP.
Represent the RPU domain resources in one device node. Each RPU
processor is a subnode of the top RPU domain node.
Signed-off-by: Jason Wu <j.wu@...inx.com>
Signed-off-by: Wendy Liang <jliang@...inx.com>
Signed-off-by: Michal Simek <michal.simek@...inx.com>
---
.../remoteproc/xilinx,zynqmp-r5-remoteproc.txt | 135 +++++++++++++++++++++
1 file changed, 135 insertions(+)
create mode 100644 Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.txt
diff --git a/Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.txt b/Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.txt
new file mode 100644
index 0000000..ee7a515
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.txt
@@ -0,0 +1,135 @@
+Xilinx ARM Cortex A53-R5 remoteproc driver
+==========================================
+
+ZynqMP family of devices use two Cortex R5 processors to help with various
+low power / real time tasks.
+
+This driver requires specific ZynqMP hardware design.
+
+ZynqMP R5 Device Node:
+=================================
+A ZynqMP R5 device node is used to represent RPU domain
+within ZynqMP SoC. This device node contains RPU processor
+subnodes.
+
+Required Properties:
+--------------------
+ - compatible : Should be "xlnx,zynqmp-r5-remoteproc-1.0"
+ - core_conf : R5 core configuration (valid string - split or lock-step)
+ - interrupts : Interrupt mapping for remoteproc IPI. It is required if the
+ user uses the remoteproc driver with the RPMsg kernel driver.
+ - interrupt-parent : Phandle for the interrupt controller. It is required if
+ the user uses the remoteproc driver with the RPMsg kernel
+ kernel driver.
+
+ZynqMP R5 Remoteproc Device Node:
+=================================
+A ZynqMP R5 Remoteproc device node is used to represent a RPU processor.
+It is a subnode to the ZynqMP R5 device node. It also contains tightly
+coupled memory subnodes.
+
+Required Properties:
+--------------------
+ - pnode-id: ZynqMP R5 processor power domain ID which will be used by
+ ZynqMP power management unit to idetify the processor.
+
+Optional Properties:
+--------------------
+ - memory-region: reserved memory which will be used by R5 processor
+
+
+ZynqMP R5 Remoteproc Device Node:
+=================================
+A ZynqMP R5 Remoteproc device node is used to represent a RPU processor.
+It is a subnode to the ZynqMP R5 device node.
+
+Required Properties:
+--------------------
+ - pnode-id: ZynqMP R5 processor power domain ID which will be used by
+ ZynqMP power management unit to idetify the processor.
+
+Optional Properties:
+--------------------
+ - memory-region: reserved memory which will be used by R5 processor
+ - mboxes: Specify tx and rx mailboxes
+ - mbox-names: List of identifier strings for tx/rx mailbox channel.
+
+ZynqMP R5 TCM Device Node:
+=================================
+The ZynqMP R5 TCM device node is used to represent the TCM memory.
+It is a subnode to the ZynqMP R5 processor.
+
+Required Properties:
+--------------------
+ - reg: TCM address range
+ - pnode-id: TCM power domain ID
+
+
+Example:
+--------
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ /* R5 0 firmware memory in DDR */
+ rproc_0_fw_reserved: rproc@...000000 {
+ no-map;
+ reg = <0x0 0x3ed00000 0x0 0x40000>;
+ };
+ /* DMA shared memory between APU and RPU */
+ rpu0vdev0buffer: rpu0vdev0buffer@...400000 {
+ compatible = "shared-dma-pool";
+ no-map;
+ reg = <0x0 0x3ed40000 0x0 0x100000>;
+ };
+ };
+
+ zynqmp-r5-remoteproc@0 {
+ compatible = "xlnx,zynqmp-r5-remoteproc-1.0";
+ core_conf = "split";
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ r5-0: r5@0 {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ memory-region = <&rproc_0_fw_reserved>,
+ <&rpu0vdev0buffer>;
+ pnode-id = <0x7>;
+ mboxes = <&ipi_mailbox_rpu0 0>, <&ipi_mailbox_rpu0 1>;
+ mbox-names = "tx", "rx";
+ tcm-a: tcm@0 {
+ reg = <0x0 0xFFE00000 0x0 0x10000>,
+ pnode-id = <0xf>;
+ };
+ tcm-b: tcm@1 {
+ reg = <0x0 0xFFE20000 0x0 0x10000>,
+ pnode-id = <0x10>;
+ };
+ };
+ } ;
+
+ zynqmp_ipi {
+ compatible = "xlnx,zynqmp-ipi-mailbox";
+ interrupt-parent = <&gic>;
+ interrupts = <0 29 4>;
+ xlnx,ipi-id = <7>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ /* APU<->RPU0 IPI mailbox controller */
+ ipi_mailbox_rpu0: mailbox@...0600 {
+ reg = <0xff990600 0x20>,
+ <0xff990620 0x20>,
+ <0xff9900c0 0x20>,
+ <0xff9900e0 0x20>;
+ reg-names = "local_request_region",
+ "local_response_region",
+ "remote_request_region",
+ "remote_response_region";
+ #mbox-cells = <1>;
+ xlnx,ipi-id = <1>;
+ };
+ };
--
2.7.4
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