From: Rajendra Nayak <rnayak@codeaurora.org>
To: viresh.kumar@linaro.org, sboyd@kernel.org, andy.gross@linaro.org,
ulf.hansson@linaro.org
Cc: devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org,
linux-kernel@vger.kernel.org,
Rajendra Nayak <rnayak@codeaurora.org>
Subject: [PATCH 3/7] dt-bindings: opp: Introduce qcom-opp bindings
Date: Fri, 16 Mar 2018 09:38:20 +0530 [thread overview]
Message-ID: <20180316040824.21472-4-rnayak@codeaurora.org> (raw)
In-Reply-To: <20180316040824.21472-1-rnayak@codeaurora.org>
On Qualcomm platforms, an OPP node needs to describe an
additional level/corner value that is then communicated to
a remote microprocessor by the CPU, which then takes some
actions (like adjusting voltage values across various rails)
based on the value passed.
Describe these bindings in the qcom-opp bindings document.
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
---
Documentation/devicetree/bindings/opp/qcom-opp.txt | 25 ++++++++++++++++++++++
1 file changed, 25 insertions(+)
create mode 100644 Documentation/devicetree/bindings/opp/qcom-opp.txt
diff --git a/Documentation/devicetree/bindings/opp/qcom-opp.txt b/Documentation/devicetree/bindings/opp/qcom-opp.txt
new file mode 100644
index 000000000000..56fe87751881
--- /dev/null
+++ b/Documentation/devicetree/bindings/opp/qcom-opp.txt
@@ -0,0 +1,25 @@
+Qualcomm OPP bindings to descibe OPP nodes with corner/level values
+
+OPP tables for devices on qualcomm platforms require an additional
+platform specific corner/level value to be specified.
+This value is passed on to the RPM (Resource Power Manager) by
+the CPU, which then takes the necessary actions to set a voltage
+rail to a appropriate voltage based on the value passed.
+
+The bindings are based on top of the operating-points-v2 bindings
+described in Documentation/devicetree/bindings/opp/opp.txt
+Additional properties are described below.
+
+* OPP Table Node
+
+Required properties:
+- compatible: Allow OPPs to express their compatibility. It should be:
+ "operating-points-v2-qcom"
+
+* OPP Node
+
+Required properties:
+- qcom,level: On Qualcomm platforms an OPP node can describe a positive value
+representing a corner/level thats comminicated with a remote microprocessor
+(Usually called the RPM) which then translates it into a certain voltage on
+a voltage rail.
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2018-03-16 4:08 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-16 4:08 [PATCH 0/7] Add powerdomain driver for corners on msm8996 Rajendra Nayak
2018-03-16 4:08 ` [PATCH 1/7] PM / OPP: Add dev_pm_opp_get_of_node() Rajendra Nayak
2018-04-07 13:00 ` Stephen Boyd
2018-04-09 3:22 ` Viresh Kumar
2018-04-09 15:17 ` Jordan Crouse
2018-03-16 4:08 ` [PATCH 2/7] soc: qcom: rpmpd: Add a powerdomain driver to model corners Rajendra Nayak
2018-03-18 12:52 ` Rob Herring
2018-03-16 4:08 ` Rajendra Nayak [this message]
2018-03-16 4:33 ` [PATCH 3/7] dt-bindings: opp: Introduce qcom-opp bindings Viresh Kumar
2018-03-26 22:22 ` Rob Herring
2018-04-07 13:05 ` Stephen Boyd
2018-03-16 4:08 ` [PATCH 4/7] soc: qcom: rpmpd: Add support for get/set performance state Rajendra Nayak
2018-03-16 4:35 ` Viresh Kumar
2018-03-16 5:52 ` Rajendra Nayak
2018-03-16 4:08 ` [PATCH 5/7] arm64: dts: msm8996: Add rpmpd device node Rajendra Nayak
2018-03-16 4:38 ` Viresh Kumar
2018-04-09 16:03 ` Stephen Boyd
2018-04-10 3:40 ` Viresh Kumar
2018-04-10 4:19 ` Rajendra Nayak
2018-03-16 4:08 ` [PATCH 6/7] mmc: sdhci-msm: Adapt the driver to use OPPs to set clocks/performance state Rajendra Nayak
2018-03-16 4:41 ` Viresh Kumar
2018-03-16 4:08 ` [PATCH 7/7] soc: qcom: rpmpd: Add a max vote on all corners at init Rajendra Nayak
2018-03-16 4:41 ` Viresh Kumar
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