summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt
parentInitial commit. (diff)
downloadlinux-upstream/4.19.249.tar.xz
linux-upstream/4.19.249.zip
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt')
-rw-r--r--Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt66
1 files changed, 66 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt
new file mode 100644
index 000000000..6e8a9ab0f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/qcom,apcs-kpss-global.txt
@@ -0,0 +1,66 @@
+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,sdm845-apss-shared"
+
+- reg:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: must specify the base address and size of the global block
+- clocks:
+ Usage: required if #clocks-cells property is present
+ Value type: <phandle>
+ Definition: phandle to the input PLL, which feeds the APCS mux/divider
+
+- #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
+
+
+= 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>;
+ };