regulator: PM8350B LDO support

Esteban Urrutia <esteuwu@proton.me> says:

The PM8350B PMIC has an LDO regulator which seems to be mostly used for
powering display driver ICs.
On my device's schematics, vdd-l1-supply is represented as VIN_DDIC, and
vdd-l1 is represented as VREG_DDIC.
Downstream this LDO is of type pmic5-ldo and I assume it should be of
type pmic5_nldo upstream, since this is the type of regulator with the
least margin error for the reference voltage, which is 1250-1296mV for
my device.

Link: https://patch.msgid.link/20260723-pm8350b-ldo-v1-0-42b5428a0d3f@proton.me

Documentation/devicetree/bindings/regulator/qcom,rpmh-regulator.yaml

@@ -47,6 +47,7 @@ description: |
       For PM8150, smps1 - smps10, ldo1 - ldo18
       For PM8150L, smps1 - smps8, ldo1 - ldo11, bob, flash, rgb
       For PM8350, smps1 - smps12, ldo1 - ldo10
+      For PM8350B, ldo1
       For PM8350C, smps1 - smps10, ldo1 - ldo13, bob
       For PM8450, smps1 - smps6, ldo1 - ldo4
       For PM8550, smps1 - smps6, ldo1 - ldo17, bob1 - bob2
@@ -82,6 +83,7 @@ properties:
       - qcom,pm8150-rpmh-regulators
       - qcom,pm8150l-rpmh-regulators
       - qcom,pm8350-rpmh-regulators
+      - qcom,pm8350b-rpmh-regulators
       - qcom,pm8350c-rpmh-regulators
       - qcom,pm8450-rpmh-regulators
       - qcom,pm8550-rpmh-regulators
@@ -337,6 +339,15 @@ allOf:
       patternProperties:
         "^vdd-s([1-9]|1[0-2])-supply$": true
 
+  - if:
+      properties:
+        compatible:
+          enum:
+            - qcom,pm8350b-rpmh-regulators
+    then:
+      properties:
+        vdd-l1-supply: true
+
   - if:
       properties:
         compatible:

drivers/regulator/qcom-rpmh-regulator.c

@@ -1269,6 +1269,11 @@ static const struct rpmh_vreg_init_data pm8350_vreg_data[] = {
 	{}
 };
 
+static const struct rpmh_vreg_init_data pm8350b_vreg_data[] = {
+	RPMH_VREG("ldo1",   LDO,  1,  &pmic5_nldo,      "vdd-l1"),
+	{}
+};
+
 static const struct rpmh_vreg_init_data pm8350c_vreg_data[] = {
 	RPMH_VREG("smps1",  SMPS, 1,  &pmic5_hfsmps515, "vdd-s1"),
 	RPMH_VREG("smps2",  SMPS, 2,  &pmic5_ftsmps510, "vdd-s2"),
@@ -1868,6 +1873,10 @@ static const struct of_device_id __maybe_unused rpmh_regulator_match_table[] = {
 		.compatible = "qcom,pm8350-rpmh-regulators",
 		.data = pm8350_vreg_data,
 	},
+	{
+		.compatible = "qcom,pm8350b-rpmh-regulators",
+		.data = pm8350b_vreg_data,
+	},
 	{
 		.compatible = "qcom,pm8350c-rpmh-regulators",
 		.data = pm8350c_vreg_data,