linux-kernel - [PATCH v4 2/6] dt-bindings: mips: Add bindings for Microsemi SoCs

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Message-Id: <20180302224811.26840-3-alexandre.belloni@bootlin.com>
Date:   Fri,  2 Mar 2018 23:48:07 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     James Hogan <jhogan@...nel.org>, Ralf Baechle <ralf@...ux-mips.org>
Cc:     Allan Nielsen <Allan.Nielsen@...rosemi.com>,
        linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
        Alexandre Belloni <alexandre.belloni@...tlin.com>
Subject: [PATCH v4 2/6] dt-bindings: mips: Add bindings for Microsemi SoCs

Add bindings for Microsemi SoCs. Currently only Ocelot is supported.

Reviewed-by: Rob Herring <robh+dt@...nel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 Documentation/devicetree/bindings/mips/mscc.txt | 44 +++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mips/mscc.txt

diff --git a/Documentation/devicetree/bindings/mips/mscc.txt b/Documentation/devicetree/bindings/mips/mscc.txt
new file mode 100644
index 000000000000..f4514c274510
--- /dev/null
+++ b/Documentation/devicetree/bindings/mips/mscc.txt
@@ -0,0 +1,44 @@
+* Microsemi MIPS CPUs
+
+Boards with a SoC of the Microsemi MIPS family shall have the following
+properties:
+
+Required properties:
+- compatible: "mscc,ocelot"
+- mips-hpt-frequency: CPU counter frequency.
+
+
+* Other peripherals:
+
+o CPU chip regs:
+
+The SoC has a few registers (DEVCPU_GCB:CHIP_REGS) handling miscellaneous
+functionalities: chip ID, general purpose register for software use, reset
+controller, hardware status and configuration, efuses.
+
+Required properties:
+- compatible: Should be "mscc,ocelot-chip-regs", "simple-mfd", "syscon"
+- reg : Should contain registers location and length
+
+Example:
+	syscon@...70000 {
+		compatible = "mscc,ocelot-chip-regs", "simple-mfd", "syscon";
+		reg = <0x71070000 0x1c>;
+	};
+
+
+o CPU system control:
+
+The SoC has a few registers (ICPU_CFG:CPU_SYSTEM_CTRL) handling configuration of
+the CPU: 8 general purpose registers, reset control, CPU en/disabling, CPU
+endianness, CPU bus control, CPU status.
+
+Required properties:
+- compatible: Should be "mscc,ocelot-cpu-syscon", "syscon"
+- reg : Should contain registers location and length
+
+Example:
+	syscon@...00000 {
+		compatible = "mscc,ocelot-cpu-syscon", "syscon";
+		reg = <0x70000000 0x2c>;
+	};
-- 
2.16.2