dt-bindings: leds: leds-qcom-lpg: Add support for LPG PPG

Update leds-qcom-lpg binding to support LPG PPG.
Signed-off-by: Anjelique Melendez <quic_amelende@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231221185838.28440-3-quic_amelende@quicinc.comSigned-off-by: Lee Jones <lee@kernel.org>

Documentation/devicetree/bindings/leds/leds-qcom-lpg.yaml

@@ -11,7 +11,7 @@ maintainers:
 
 description: >
   The Qualcomm Light Pulse Generator consists of three different hardware blocks;
-  a ramp generator with lookup table, the light pulse generator and a three
+  a ramp generator with lookup table (LUT), the light pulse generator and a three
   channel current sink. These blocks are found in a wide range of Qualcomm PMICs.
 
 properties:
@@ -63,6 +63,29 @@ properties:
         - description: dtest line to attach
         - description: flags for the attachment
 
+  nvmem:
+    description: >
+      This property is required for PMICs that supports PPG, which is when a
+      PMIC stores LPG per-channel data and pattern LUT in SDAM modules instead
+      of in a LUT peripheral. For PMICs, such as PM8350C, per-channel data
+      and pattern LUT is separated into 2 SDAM modules. In that case, phandles
+      to both SDAM modules need to be specified.
+    minItems: 1
+    maxItems: 2
+
+  nvmem-names:
+    minItems: 1
+    items:
+      - const: lpg_chan_sdam
+      - const: lut_sdam
+
+  qcom,pbs:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: >
+      Phandle of the Qualcomm Programmable Boot Sequencer node (PBS).
+      PBS node is used to trigger LPG pattern sequences for PMICs that support
+      single SDAM PPG.
+
   multi-led:
     type: object
     $ref: leds-class-multicolor.yaml#
@@ -106,6 +129,32 @@ required:
 
 additionalProperties: false
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,pmi632-lpg
+    then:
+      properties:
+        nvmem:
+          maxItems: 1
+        nvmem-names:
+          maxItems: 1
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,pm8350c-pwm
+              - qcom,pm8550-pwm
+    then:
+      properties:
+        nvmem:
+          minItems: 2
+        nvmem-names:
+          minItems: 2
+
 examples:
   - |
     #include <dt-bindings/leds/common.h>
@@ -191,4 +240,35 @@ examples:
       compatible = "qcom,pm8916-pwm";
       #pwm-cells = <2>;
     };
+  - |
+    #include <dt-bindings/leds/common.h>
+
+    led-controller {
+      compatible = "qcom,pmi632-lpg";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      #pwm-cells = <2>;
+      nvmem-names = "lpg_chan_sdam";
+      nvmem = <&pmi632_sdam_7>;
+      qcom,pbs = <&pmi632_pbs_client3>;
+
+      led@1 {
+        reg = <1>;
+        color = <LED_COLOR_ID_RED>;
+        label = "red";
+      };
+
+      led@2 {
+        reg = <2>;
+        color = <LED_COLOR_ID_GREEN>;
+        label = "green";
+      };
+
+      led@3 {
+        reg = <3>;
+        color = <LED_COLOR_ID_BLUE>;
+        label = "blue";
+      };
+    };
+
 ...