linux-kernel - [PATCH v2 2/5] dt-bindings: perf: stm32: ddrperfm support

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Date:   Mon, 20 May 2019 15:27:16 +0000
From:   Gerald BAEZA <gerald.baeza@...com>
To:     "will.deacon@....com" <will.deacon@....com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        "corbet@....net" <corbet@....net>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "olof@...om.net" <olof@...om.net>,
        "horms+renesas@...ge.net.au" <horms+renesas@...ge.net.au>,
        "arnd@...db.de" <arnd@...db.de>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        Gerald BAEZA <gerald.baeza@...com>
Subject: [PATCH v2 2/5] dt-bindings: perf: stm32: ddrperfm support

The DDRPERFM is the DDR Performance Monitor embedded in STM32MP1 SOC.

This documentation indicates how to enable stm32-ddr-pmu driver on
DDRPERFM peripheral, via the device tree.

Signed-off-by: Gerald Baeza <gerald.baeza@...com>
---
 .../devicetree/bindings/perf/stm32-ddr-pmu.txt       | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt

diff --git a/Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt b/Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt
new file mode 100644
index 0000000..9d36209
--- /dev/null
+++ b/Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt
@@ -0,0 +1,20 @@
+* STM32 DDR Performance Monitor (DDRPERFM)
+
+Required properties:
+- compatible: must be "st,stm32-ddr-pmu".
+- reg: physical address and length of the registers set.
+- clocks: list of phandles and specifiers to all input clocks listed in
+	  clock-names property.
+- clock-names: "bus" corresponds to the DDRPERFM bus clock and "ddr" to
+	       the DDR frequency.
+- resets: phandle to the reset controller and DDRPERFM reset specifier
+
+Example:
+	ddrperfm: perf@...07000 {
+		compatible = "st,stm32-ddr-pmu";
+		reg = <0x5a007000 0x400>;
+		clocks = <&rcc DDRPERFM>, <&rcc PLL2_R>;
+		clock-names = "bus", "ddr";
+		resets = <&rcc DDRPERFM_R>;
+	};
+
-- 
2.7.4