[PATCH 1/4] dt-bindings: phy: qcom,qusb2: Straighten out SM6125 and MSM8996

[Konrad Dybcio]

From: Konrad Dybcio <konrad.dybcio at oss.qualcomm.com>

SM6125 DT currently uses just the MSM8996 compatible (without a primary
SM6125-specific one). This is not only wrong for the reasons of
violating guidelines, but also happens to not be valid.

The MSM8996 PHY is quite similar, although it requies a different init
sequence (for arch reasons). MSM8996 also needs different power
plumbing, as the VDD supply is fed through VDD_MX (which we define as
a power domain rather than a regulator), unlike on SM6125.

The init sequence seems to have been "good enough", but now that the
bindings clearly diverge, add a new compatible for SM6125 with a SM6115
fallback (as they seem to be an exact match from the SW interface POV).

Signed-off-by: Konrad Dybcio <konrad.dybcio at oss.qualcomm.com>
---
 .../devicetree/bindings/phy/qcom,qusb2-phy.yaml    | 31 ++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
index 39851ba9de43..807d64aee547 100644
--- a/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
@@ -30,6 +30,9 @@ properties:
               - qcom,sdm660-qusb2-phy
               - qcom,sm4250-qusb2-phy
               - qcom,sm6115-qusb2-phy
+      - items:
+          - const: qcom,sm6125-qusb2-phy
+          - const: qcom,sm6115-qusb2-phy
       - items:
           - enum:
               - qcom,sc7180-qusb2-phy
@@ -57,6 +60,12 @@ properties:
       - const: ref
       - const: iface
 
+  power-domains:
+    maxItems: 1
+
+  required-opps:
+    maxItems: 1
+
   vdd-supply:
     description:
       Phandle to 0.9V regulator supply to PHY digital circuit.
@@ -160,7 +169,6 @@ required:
   - "#phy-cells"
   - clocks
   - clock-names
-  - vdd-supply
   - vdda-pll-supply
   - vdda-phy-dpdm-supply
   - resets
@@ -182,6 +190,22 @@ allOf:
         qcom,preemphasis-width: false
         qcom,hsdisc-trim-value: false
 
+  # On MSM8996, VDD is supplied via the MX power domain
+  - if:
+      properties:
+        compatible:
+          const: qcom,msm8996-qusb2-phy
+    then:
+      required:
+        - power-domains
+        - required-opps
+    else:
+      properties:
+        power-domains: false
+        required-opps: false
+      required:
+        - vdd-supply
+
 additionalProperties: false
 
 examples:
@@ -196,10 +220,13 @@ examples:
                  <&gcc GCC_RX1_USB2_CLKREF_CLK>;
         clock-names = "cfg_ahb", "ref";
 
-        vdd-supply = <&pm8994_l28>;
         vdda-pll-supply = <&pm8994_l12>;
         vdda-phy-dpdm-supply = <&pm8994_l24>;
 
         resets = <&gcc GCC_QUSB2PHY_PRIM_BCR>;
+
+        power-domains = <&rpmpd_mx>;
+        required-opps = <&rpmpd_opp4>;
+
         nvmem-cells = <&qusb2p_hstx_trim>;
     };

-- 
2.54.0