From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rajendra Nayak Subject: [PATCH 3/7] dt-bindings: opp: Introduce qcom-opp bindings Date: Fri, 16 Mar 2018 09:38:20 +0530 Message-ID: <20180316040824.21472-4-rnayak@codeaurora.org> References: <20180316040824.21472-1-rnayak@codeaurora.org> Return-path: In-Reply-To: <20180316040824.21472-1-rnayak@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.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 List-Id: linux-arm-msm@vger.kernel.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 --- 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