From 0ae7d327a64b262443b7d3ebee5831e4dde47b89 Mon Sep 17 00:00:00 2001 From: Georgi Djakov Date: Tue, 5 Dec 2017 17:47:00 +0200 Subject: [PATCH] dt-bindings: mailbox: qcom: Document the APCS clock binding Update the binding documentation for APCS to mention that the APCS hardware block also expose a clock controller functionality. The APCS clock controller is a mux and half-integer divider. It has the main CPU PLL as an input and provides the clock for the application CPU. Signed-off-by: Georgi Djakov Reviewed-by: Rob Herring Acked-by: Bjorn Andersson Signed-off-by: Jassi Brar --- .../bindings/mailbox/qcom,apcs-kpss-global.txt | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt index fb961c310f44..16964f0c1773 100644 --- a/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt +++ b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt @@ -15,12 +15,21 @@ platforms. Usage: required Value type: Definition: must specify the base address and size of the global block +- clocks: + Usage: required if #clocks-cells property is present + Value type: + Definition: phandle to the input PLL, which feeds the APCS mux/divider - #mbox-cells: Usage: required Value type: Definition: as described in mailbox.txt, must be 1 +- #clock-cells: + Usage: optional + Value type: + Definition: as described in clock.txt, must be 0 + = EXAMPLE The following example describes the APCS HMSS found in MSM8996 and part of the @@ -44,3 +53,12 @@ GLINK RPM referencing the "rpm_hlos" doorbell therein. mbox-names = "rpm_hlos"; }; +Below is another example of the APCS binding on MSM8916 platforms: + + apcs: mailbox@b011000 { + compatible = "qcom,msm8916-apcs-kpss-global"; + reg = <0xb011000 0x1000>; + #mbox-cells = <1>; + clocks = <&a53pll>; + #clock-cells = <0>; + };