From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Boyd Subject: [PATCH 4/4] devicetree: bindings: qcom,mmcc: Document GDSC binding Date: Fri, 4 Apr 2014 11:45:36 -0700 Message-ID: <1396637136-29974-5-git-send-email-sboyd@codeaurora.org> References: <1396637136-29974-1-git-send-email-sboyd@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1396637136-29974-1-git-send-email-sboyd@codeaurora.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Mike Turquette Cc: devicetree@vger.kernel.org, Saravana Kannan , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mark Brown , linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org Document the GDSC nodes present within the multimedia clock controller. Cc: Signed-off-by: Stephen Boyd --- .../devicetree/bindings/clock/qcom,mmcc.txt | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/Documentation/devicetree/bindings/clock/qcom,mmcc.txt b/Documentation/devicetree/bindings/clock/qcom,mmcc.txt index d572e9964c54..695f86ad94ea 100644 --- a/Documentation/devicetree/bindings/clock/qcom,mmcc.txt +++ b/Documentation/devicetree/bindings/clock/qcom,mmcc.txt @@ -19,3 +19,45 @@ Example: #clock-cells = <1>; #reset-cells = <1>; }; + +Qualcomm Global Distributed Switch Controller (GDSC) Binding +------------------------------------------------------------ + +The GDSC is responsible for safely collapsing and restoring power to +peripheral cores on chipsets like msm8974 for power savings. + +Required properties: + - regulator-name: A string used as a descriptive name for regulator outputs + +Optional properties: + - parent-supply: phandle to the parent supply/regulator node + - qcom,retain-mem: Presence denotes a hardware requirement to leave the + forced core memory retention signals in the core's clock + branch control registers asserted. + - qcom,retain-periph: Presence denotes a hardware requirement to leave the + forced periph memory retention signal in the core's clock + branch control registers asserted. + - qcom,skip-logic-collapse: Presence denotes a requirement to leave power to + the core's logic enabled. + - qcom,support-hw-trigger: Presence denotes a hardware feature to switch + on/off this regulator based on internal HW signals + to save more power. + +Example: + clock-controller@4000000 { + compatible = "qcom,mmcc-msm8974"; + reg = <0x4000000 0x1000>; + #clock-cells = <1>; + #reset-cells = <1>; + + regulators { + gdsc_oxili_gx: gdsc_oxili_gx { + regulator-name = "gdsc_oxili_gx"; + parent-supply = <&pm8841_s4>; + qcom,retain-mem; + qcom,retain-periph; + qcom,skip-logic-collapse; + qcom,support-hw-trigger; + }; + }; + }; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation