Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0590340f authored by Amir Vajid's avatar Amir Vajid
Browse files

ARM: dts: qcom: devfreq: add support for memory latency QoS voting 

Add documentation for the new memory latency QoS voting device
which is supported on some chipsets.

Change-Id: I89b4242b4fd91923031447338e379d2add162038
parent ceb29d1a

bindings/devfreq/devfreq-qcom-qoslat.txt

0 → 100644
+37 −0
Original line number Diff line number Diff line 
QCOM Devfreq memory latency QoS voting device



Some Qualcomm Technologies, Inc. (QTI) chipsets have an interface to vote for

a memory latency QoS level. The qcom,devfreq-qoslat represents a device that

votes on this interface to request a particular memory latency QoS level.



Required properties:

- compatible:		Must be "qcom,devfreq-qoslat"

- operating-points-v2:	A phandle to the OPP v2 table that holds the supported

			QoS levels for the particular chipset. Currently, only

			OPP values of 0 and 1 are supported.

- mboxes:		A phandle to the mailbox used by this device to send

			requests to adjust the memory latency QoS level.

Optional properties:

- governor:		Initial governor to use for the device.

			Default: "powersave"



Example:



	qoslat_opp_table: qoslat-opp-table {

		compatible = "operating-points-v2";

		opp-0  {

			opp-hz = /bits/ 64 < 0 >;

		};



		opp-1 {

			opp-hz = /bits/ 64 < 1 >;

		};

	};



	qcom,devfreq-qoslat {

		compatible = "qcom,devfreq-qoslat";

		governor = "powersave";

		operating-points-v2 = <&qoslat_opp_table>;

		mboxes = <&qmp_aop 0>;

	};