linux-kernel - [PATCH 1/4] dt-bindings: reset: IMX8MQ VPU reset

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Message-Id: <20210211115003.249367-2-benjamin.gaignard@collabora.com>
Date:   Thu, 11 Feb 2021 12:50:00 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     p.zabel@...gutronix.de, robh+dt@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, festevam@...il.com, ezequiel@...labora.com,
        mchehab@...nel.org, gregkh@...uxfoundation.org
Cc:     kernel@...gutronix.de, linux-imx@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, devel@...verdev.osuosl.org,
        kernel@...labora.com, benjamin.gaignard@...labora.com
Subject: [PATCH 1/4] dt-bindings: reset: IMX8MQ VPU reset

Document bindings for IMX8MQ VPU reset hardware block

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
---
 .../bindings/reset/fsl,imx8mq-vpu-reset.yaml  | 54 +++++++++++++++++++
 include/dt-bindings/reset/imx8mq-vpu-reset.h  | 16 ++++++
 2 files changed, 70 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml
 create mode 100644 include/dt-bindings/reset/imx8mq-vpu-reset.h

diff --git a/Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml b/Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml
new file mode 100644
index 000000000000..00020421c0e3
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/fsl,imx8mq-vpu-reset.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/fsl,imx8mq-vpu-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX8MQ VPU Reset Controller
+
+maintainers:
+  - Benjamin Gaignard <benjamin.gaignard@...labora.com>
+
+description: |
+  The VPU reset controller is used to reset the video processor
+  unit peripherals. Device nodes that need access to reset lines should
+  specify them as a reset phandle in their corresponding node as
+  specified in reset.txt.
+
+  For list of all valid reset indices see
+    <dt-bindings/reset/imx8mq-vpu-reset.h> for i.MX8MQ.
+
+properties:
+  compatible:
+    items:
+      - const: fsl,imx8mq-vpu-reset
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 3
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - '#reset-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mq-clock.h>
+
+    vpu-reset@...20000 {
+        compatible = "fsl,imx8mq-vpu-reset", "syscon";
+        reg = <0x38320000 0x10000>;
+        clocks = <&clk IMX8MQ_CLK_VPU_DEC_ROOT>;
+        #reset-cells = <1>;
+    };
diff --git a/include/dt-bindings/reset/imx8mq-vpu-reset.h b/include/dt-bindings/reset/imx8mq-vpu-reset.h
new file mode 100644
index 000000000000..efcbe18177fe
--- /dev/null
+++ b/include/dt-bindings/reset/imx8mq-vpu-reset.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2021, Collabora
+ *
+ * i.MX7 System Reset Controller (SRC) driver
+ *
+ * Author: Benjamin Gaignard <benjamin.gaignard@...labora.com>
+ */
+
+#ifndef DT_BINDINGS_VPU_RESET_IMX8MQ
+#define DT_BINDINGS_VPU_RESET_IMX8MQ
+
+#define IMX8MQ_RESET_VPU_RESET_G1	0
+#define IMX8MQ_RESET_VPU_RESET_G2	1
+
+#endif
-- 
2.25.1