dt-bindings: power: rpmpd: Add MSM8939 RPM power domains

MSM8939 has three RPM power domains: VDDCX and VDDMX and VDDMDCX.
Add the device tree bindings to manage them through rpmpd.
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Link: https://lore.kernel.org/r/20200930100145.9457-2-jun.nie@linaro.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Documentation/devicetree/bindings/power/qcom,rpmpd.yaml

@@ -16,6 +16,7 @@ description:
 properties:
   compatible:
     enum:
+      - qcom,msm8939-rpmpd
       - qcom,msm8976-rpmpd
       - qcom,msm8996-rpmpd
       - qcom,msm8998-rpmpd

include/dt-bindings/power/qcom-rpmpd.h

@@ -64,6 +64,16 @@
 #define RPMH_REGULATOR_LEVEL_TURBO	384
 #define RPMH_REGULATOR_LEVEL_TURBO_L1	416
 
+/* MSM8939 Power Domains */
+#define MSM8939_VDDMDCX		0
+#define MSM8939_VDDMDCX_AO	1
+#define MSM8939_VDDMDCX_VFC	2
+#define MSM8939_VDDCX		3
+#define MSM8939_VDDCX_AO	4
+#define MSM8939_VDDCX_VFC	5
+#define MSM8939_VDDMX		6
+#define MSM8939_VDDMX_AO	7
+
 /* MSM8976 Power Domain Indexes */
 #define MSM8976_VDDCX		0
 #define MSM8976_VDDCX_AO	1