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authorSivaprakash Murugesan <sivaprak@codeaurora.org>2020-06-08 15:07:24 +0530
committerJassi Brar <jaswinder.singh@linaro.org>2020-06-08 09:35:34 -0500
commitf3a1381ec84ec1fdc8091f9935f97e836792b6a7 (patch)
tree715eeadc8f434e101d9886505b67d04af9add694 /Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt
parentb7b2796b9b31e3dcbd563bcf8f983a79bb81163d (diff)
dt-bindings: mailbox: Add YAML schemas for QCOM APCS global block
Qualcomm APCS global block provides a bunch of generic properties which are required in a device tree. Add YAML schema for these properties. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
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-Binding for the Qualcomm APCS global block
-==========================================
-
-This binding describes the APCS "global" block found in various Qualcomm
-platforms.
-
-- compatible:
- Usage: required
- Value type: <string>
- Definition: must be one of:
- "qcom,msm8916-apcs-kpss-global",
- "qcom,msm8996-apcs-hmss-global"
- "qcom,msm8998-apcs-hmss-global"
- "qcom,qcs404-apcs-apps-global"
- "qcom,sc7180-apss-shared"
- "qcom,sdm845-apss-shared"
- "qcom,sm8150-apss-shared"
- "qcom,ipq8074-apcs-apps-global"
-
-- reg:
- Usage: required
- Value type: <prop-encoded-array>
- Definition: must specify the base address and size of the global block
-
-- clocks:
- Usage: required if #clock-names property is present
- Value type: <phandle array>
- Definition: phandles to the two parent clocks of the clock driver.
-
-- #mbox-cells:
- Usage: required
- Value type: <u32>
- Definition: as described in mailbox.txt, must be 1
-
-- #clock-cells:
- Usage: optional
- Value type: <u32>
- Definition: as described in clock.txt, must be 0
-
-- clock-names:
- Usage: required if the platform data based clock driver needs to
- retrieve the parent clock names from device tree.
- This will requires two mandatory clocks to be defined.
- Value type: <string-array>
- Definition: must be "pll" and "aux"
-
-= EXAMPLE
-The following example describes the APCS HMSS found in MSM8996 and part of the
-GLINK RPM referencing the "rpm_hlos" doorbell therein.
-
- apcs_glb: mailbox@9820000 {
- compatible = "qcom,msm8996-apcs-hmss-global";
- reg = <0x9820000 0x1000>;
-
- #mbox-cells = <1>;
- };
-
- rpm-glink {
- compatible = "qcom,glink-rpm";
-
- interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
-
- qcom,rpm-msg-ram = <&rpm_msg_ram>;
-
- mboxes = <&apcs_glb 0>;
- 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>;
- };
-
-Below is another example of the APCS binding on QCS404 platforms:
-
- apcs_glb: mailbox@b011000 {
- compatible = "qcom,qcs404-apcs-apps-global", "syscon";
- reg = <0x0b011000 0x1000>;
- #mbox-cells = <1>;
- clocks = <&apcs_hfpll>, <&gcc GCC_GPLL0_AO_OUT_MAIN>;
- clock-names = "pll", "aux";
- #clock-cells = <0>;
- };