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

[Gerald BAEZA <gerald.baeza@st.com>]

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@st.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@5a007000 {
+		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