Add description for optional interrupt lines. It provides a new operation
mode, which uses internal performance counters interrupt when overflow.
This is more reliable than using default polling mode implemented in
devfreq.
Signed-off-by: Lukasz Luba <l.luba@xxxxxxxxxxxxxxxxxxx>
---
.../bindings/memory-controllers/exynos5422-dmc.txt | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt b/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt
index 02aeb3b5a820..e2434cac4858 100644
--- a/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/exynos5422-dmc.txt
@@ -31,6 +31,14 @@ Required properties for DMC device for Exynos5422:
The register offsets are in the driver code and specyfic for this SoC
type.
+Optional properties for DMC device for Exynos5422:
+- interrupt-parent : The parent interrupt controller.
+- interrupts : Contains the IRQ line numbers for the DMC internal performance
+ event counters in DREX0 and DREX1 channels. Align with specification of the
+ interrupt line(s) in the interrupt-parent controller.
+- interrupt-names : IRQ names "drex_0" and "drex_1", the order should be the
+ same as in the 'interrupts' list above.
+
Example:
ppmu_dmc0_0: ppmu@10d00000 {
@@ -70,4 +78,7 @@ Example:
device-handle = <&samsung_K3QF2F20DB>;
vdd-supply = <&buck1_reg>;
samsung,syscon-clk = <&clock>;
+ interrupt-parent = <&combiner>;
+ interrupts = <16 0>, <16 1>;
+ interrupt-names = "drex_0", "drex_1";
};
--
2.17.1
