[PATCH v6 14/52] dt-bindings: memory: tegra124: emc: Document OPP table and voltage regulator

Dmitry Osipenko
2020-10-25T22:18:34Z

Document new OPP table and voltage regulator properties which are needed
for supporting dynamic voltage-frequency scaling of the memory controller.
Some boards may have a fixed core voltage regulator, hence it's optional
because frequency scaling still may be desired.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
.../memory-controllers/nvidia,tegra124-emc.yaml | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-emc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-emc.yaml
index ac00832ceac1..3f74cd173ba0 100644
--- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-emc.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-emc.yaml
@@ -37,6 +37,15 @@ properties:
description:
phandle of the memory controller node

+ core-supply:
+ description:
+ Phandle of voltage regulator of the SoC "core" power domain.
+
+ operating-points-v2:
+ description:
+ Should contain freqs and voltages and opp-supported-hw property, which
+ is a bitfield indicating SoC speedo ID mask.
+
patternProperties:
"^emc-timings-[0-9]+$":
type: object
@@ -359,6 +368,8 @@ examples:
clock-names = "emc";

nvidia,memory-controller = <&mc>;
+ operating-points-v2 = <&dvfs_opp_table>;
+ core-supply = <&vdd_core>;

#interconnect-cells = <0>;

--
2.27.0