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From: mgross@linux.intel.com
To: markgross@kernel.org, mgross@linux.intel.com, arnd@arndb.de,
	bp@suse.de, damien.lemoal@wdc.com, dragan.cvetic@xilinx.com,
	gregkh@linuxfoundation.org, corbet@lwn.net,
	leonard.crestez@nxp.com, palmerdabbelt@google.com,
	paul.walmsley@sifive.com, peng.fan@nxp.com, robh+dt@kernel.org,
	shawnguo@kernel.org, jassisinghbrar@gmail.com
Cc: linux-kernel@vger.kernel.org,
	Daniele Alessandrelli <daniele.alessandrelli@intel.com>
Subject: [PATCH v2 02/34] dt-bindings: mailbox: Add Intel VPU IPC mailbox bindings
Date: Fri,  8 Jan 2021 13:25:28 -0800
Message-ID: <20210108212600.36850-3-mgross@linux.intel.com> (raw)
In-Reply-To: <20210108212600.36850-1-mgross@linux.intel.com>

From: Daniele Alessandrelli <daniele.alessandrelli@intel.com>

Add bindings for the Intel VPU IPC mailbox driver.

Signed-off-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
---
 .../mailbox/intel,vpu-ipc-mailbox.yaml        | 69 +++++++++++++++++++
 MAINTAINERS                                   |  6 ++
 2 files changed, 75 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mailbox/intel,vpu-ipc-mailbox.yaml

diff --git a/Documentation/devicetree/bindings/mailbox/intel,vpu-ipc-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/intel,vpu-ipc-mailbox.yaml
new file mode 100644
index 000000000000..923a6d619a64
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/intel,vpu-ipc-mailbox.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2020 Intel Corporation
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/mailbox/intel,vpu-ipc-mailbox.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Intel VPU IPC mailbox
+
+maintainers:
+  - Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+
+description: |
+  Intel VPU SoCs like Keem Bay have hardware FIFOs to enable Inter-Processor
+  Communication (IPC) between the CPU and the VPU.
+
+  Specifically, there is one HW FIFO for the CPU (aka Application Processor -
+  AP) and one for the VPU. Each FIFO can hold 128 entries of 32 bits each. A
+  "FIFO-not-empty" interrupt is raised every time there is at least a message
+  in the FIFO. The CPU FIFO raises interrupts to the CPU, while the VPU FIFO
+  raises interrupts to VPU. When the CPU wants to send a message to the VPU it
+  writes to the VPU FIFO, similarly, when the VPU want to send a message to the
+  CPU, it writes to the CPU FIFO.
+
+  Refer to ./mailbox.txt for generic information about mailbox device-tree
+  bindings.
+
+properties:
+  compatible:
+    const: intel,vpu-ipc-mailbox
+
+  reg:
+    items:
+      - description: The CPU FIFO registers
+      - description: The VPU FIFO registers
+
+  reg-names:
+    items:
+      - const: cpu_fifo
+      - const: vpu_fifo
+
+  interrupts:
+    items:
+      - description: CPU FIFO-not-empty interrupt
+
+  "#mbox-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - "#mbox-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    vpu_ipc_mailbox@203300f0 {
+        compatible = "intel,vpu-ipc-mailbox";
+        #mbox-cells = <1>;
+        reg = <0x203300f0 0x310>,
+              <0x208200f0 0x310>;
+        reg-names = "cpu_fifo", "vpu_fifo";
+        interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 6eff4f720c72..c0fb04969916 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9183,6 +9183,12 @@ L:	platform-driver-x86@vger.kernel.org
 S:	Maintained
 F:	drivers/platform/x86/intel-vbtn.c
 
+INTEL VPU IPC MAILBOX
+M:	Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+M:	Mark Gross <mgross@linux.intel.com>
+S:	Supported
+F:	Documentation/devicetree/bindings/mailbox/intel,vpu-ipc-mailbox.yaml
+
 INTEL WIRELESS 3945ABG/BG, 4965AGN (iwlegacy)
 M:	Stanislaw Gruszka <stf_xl@wp.pl>
 L:	linux-wireless@vger.kernel.org
-- 
2.17.1


  parent reply index

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-08 21:25 [PATCH v2 00/34] Intel Vision Processing base enabling mgross
2021-01-08 21:25 ` [PATCH v2 01/34] Add Vision Processing Unit (VPU) documentation mgross
2021-01-08 21:25 ` mgross [this message]
2021-01-08 21:25 ` [PATCH v2 03/34] mailbox: vpu-ipc-mailbox: Add support for Intel VPU IPC mailbox mgross
2021-01-08 21:25 ` [PATCH v2 04/34] dt-bindings: Add bindings for Keem Bay IPC driver mgross
2021-01-08 21:25 ` [PATCH v2 05/34] keembay-ipc: Add Keem Bay IPC module mgross
2021-01-08 21:25 ` [PATCH v2 06/34] dt-bindings: Add bindings for Keem Bay VPU IPC driver mgross
2021-01-10 17:18   ` Rob Herring
2021-01-11 19:24   ` Rob Herring
2021-01-19 14:32     ` Alessandrelli, Daniele
2021-01-08 21:25 ` [PATCH v2 07/34] keembay-vpu-ipc: Add Keem Bay VPU IPC module mgross
2021-01-08 21:25 ` [PATCH v2 08/34] misc: xlink-pcie: Add documentation for XLink PCIe driver mgross
2021-01-19 19:36   ` Randy Dunlap
2021-01-24 18:27     ` Thokala, Srikanth
2021-01-08 21:25 ` [PATCH v2 09/34] misc: xlink-pcie: lh: Add PCIe EPF driver for Local Host mgross
2021-01-20 17:57   ` Greg KH
2021-01-24 11:48     ` Thokala, Srikanth
2021-01-24 11:56       ` Greg KH
2021-01-24 18:18         ` Thokala, Srikanth
2021-01-08 21:25 ` [PATCH v2 10/34] misc: xlink-pcie: lh: Add PCIe EP DMA functionality mgross
2021-01-08 21:25 ` [PATCH v2 11/34] misc: xlink-pcie: lh: Add core communication logic mgross
2021-01-08 21:25 ` [PATCH v2 12/34] misc: xlink-pcie: lh: Prepare changes for adding remote host driver mgross
2021-01-08 21:25 ` [PATCH v2 13/34] misc: xlink-pcie: rh: Add PCIe EP driver for Remote Host mgross
2021-01-08 21:25 ` [PATCH v2 14/34] misc: xlink-pcie: rh: Add core communication logic mgross
2021-01-08 21:25 ` [PATCH v2 15/34] misc: xlink-pcie: Add XLink API interface mgross
2021-01-20 17:59   ` Greg KH
2021-01-21 23:20     ` mark gross
2021-01-24 11:46     ` Thokala, Srikanth
2021-01-08 21:25 ` [PATCH v2 16/34] misc: xlink-pcie: Add asynchronous event notification support for XLink mgross
2021-01-08 21:25 ` [PATCH v2 17/34] xlink-ipc: Add xlink ipc device tree bindings mgross
2021-01-10 17:18   ` Rob Herring
2021-01-08 21:25 ` [PATCH v2 18/34] xlink-ipc: Add xlink ipc driver mgross
2021-01-08 21:25 ` [PATCH v2 19/34] xlink-core: Add xlink core device tree bindings mgross
2021-01-10 17:18   ` Rob Herring
2021-01-11 19:27   ` Rob Herring
2021-01-08 21:25 ` [PATCH v2 20/34] xlink-core: Add xlink core driver xLink mgross
2021-01-19 19:58   ` Randy Dunlap
2021-01-08 21:25 ` [PATCH v2 21/34] xlink-core: Enable xlink protocol over pcie mgross
2021-01-08 21:25 ` [PATCH v2 22/34] xlink-core: Enable VPU IP management and runtime control mgross
2021-01-08 21:25 ` [PATCH v2 23/34] xlink-core: add async channel and events mgross
2021-01-08 21:25 ` [PATCH v2 24/34] dt-bindings: misc: Add Keem Bay vpumgr mgross
2021-01-08 21:25 ` [PATCH v2 25/34] misc: Add Keem Bay VPU manager mgross
2021-01-08 21:25 ` [PATCH v2 26/34] dt-bindings: misc: intel_tsens: Add tsens thermal bindings documentation mgross
2021-01-08 21:25 ` [PATCH v2 27/34] misc: Tsens ARM host thermal driver mgross
2021-01-08 21:25 ` [PATCH v2 28/34] misc: Intel tsens IA host driver mgross
2021-01-08 21:25 ` [PATCH v2 29/34] Intel tsens i2c slave driver mgross
2021-01-12  7:15   ` Randy Dunlap
2021-01-25 23:39     ` mark gross
2021-01-26  7:45       ` Arnd Bergmann
2021-01-26 14:56         ` Gross, Mark
2021-01-27  4:45         ` C, Udhayakumar
2021-01-27  4:44       ` C, Udhayakumar
2021-01-08 21:25 ` [PATCH v2 30/34] misc:intel_tsens: Intel Keem Bay tsens driver mgross
2021-01-08 21:25 ` [PATCH v2 31/34] Intel Keem Bay XLink SMBus driver mgross
2021-01-08 21:25 ` [PATCH v2 32/34] dt-bindings: misc: hddl_dev: Add hddl device management documentation mgross
2021-01-08 21:25 ` [PATCH v2 33/34] misc: Hddl device management for local host mgross
2021-01-08 21:26 ` [PATCH v2 34/34] misc: HDDL device management for IA host mgross

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