dt-bindings: mfd: samsung,s2mpg10-pmic: Link to its regulators

Update the regulators node to link to the correct and expected
samsung,s2mpg10-regulators binding, in order to describe the regulators
available on this PMIC.

Additionally, describe the supply inputs of the regulator rails, with
the supply names matching the datasheet.

While at it, update the description and example slightly.

Note: S2MPG10 is typically used as the main-PMIC together with an
S2MPG11 PMIC in a main/sub configuration, hence the datasheet and the
binding both suffix the supplies with an 'm'.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20260122-s2mpg1x-regulators-v7-5-3b1f9831fffd@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: andred

Documentation/devicetree/bindings/mfd/samsung,s2mpg10-pmic.yaml

@@ -10,12 +10,13 @@ maintainers:
   - André Draszik <andre.draszik@linaro.org>
 
 description: |
-  This is part of the device tree bindings for the S2MPG family of Power
-  Management IC (PMIC).
+  This is part of the device tree bindings for the S2MPG10 Power Management IC
+  (PMIC).
 
   The Samsung S2MPG10 is a Power Management IC for mobile applications with buck
   converters, various LDOs, power meters, RTC, clock outputs, and additional
-  GPIO interfaces.
+  GPIO interfaces and is typically complemented by S2MPG10 PMIC in a main/sub
+  configuration as the main PMIC.
 
 properties:
   compatible:
@@ -31,13 +32,40 @@ properties:
 
   regulators:
     type: object
+    $ref: /schemas/regulator/samsung,s2mpg10-regulator.yaml
     description:
       List of child nodes that specify the regulators.
 
   system-power-controller: true
 
   wakeup-source: true
 
+patternProperties:
+  "^vinb([1-9]|10)m-supply$":
+    description:
+      Phandle to the power supply for each buck rail of this PMIC. There is a
+      1:1 mapping of supply to rail, e.g. vinb1m-supply supplies buck1m.
+
+  "^vinl([1-9]|1[0-5])m-supply$":
+    description: |
+      Phandle to the power supply for one or multiple LDO rails of this PMIC.
+      The mapping of supply to rail(s) is as follows:
+        vinl1m - ldo13m
+        vinl2m - ldo15m
+        vinl3m - ldo1m, ldo5m, ldo7m
+        vinl4m - ldo3m, ldo8m
+        vinl5m - ldo16m
+        vinl6m - ldo17m
+        vinl7m - ldo6m, ldo11m, ldo24m, ldo28m
+        vinl8m - ldo12m
+        vinl9m - ldo2m, ldo4m
+        vinl10m - ldo9m, ldo14m, ldo18m, 19m, ldo20m, ldo25m
+        vinl11m - ldo23m, ldo31m
+        vinl12m - ldo29m
+        vinl13m - ldo30m
+        vinl14m - ldo21m
+        vinl15m - ldo10m, ldo22m, ldo26m, ldo27m
+
 required:
   - compatible
   - interrupts
@@ -49,6 +77,7 @@ examples:
   - |
     #include <dt-bindings/gpio/gpio.h>
     #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/regulator/samsung,s2mpg10-regulator.h>
 
     pmic {
         compatible = "samsung,s2mpg10-pmic";
@@ -58,12 +87,34 @@ examples:
         system-power-controller;
         wakeup-source;
 
+        vinl3m-supply = <&buck8m>;
+
         clocks {
             compatible = "samsung,s2mpg10-clk";
             #clock-cells = <1>;
             clock-output-names = "rtc32k_ap", "peri32k1", "peri32k2";
         };
 
         regulators {
+            buck8m {
+                regulator-name = "vdd_mif";
+                regulator-min-microvolt = <450000>;
+                regulator-max-microvolt = <1300000>;
+                regulator-ramp-delay = <6250>;
+            };
+
+            ldo1m {
+                regulator-name = "vdd_ldo1";
+                regulator-min-microvolt = <700000>;
+                regulator-max-microvolt = <1300000>;
+            };
+
+            ldo20m {
+                regulator-name = "vdd_dmics";
+                regulator-min-microvolt = <700000>;
+                regulator-max-microvolt = <1300000>;
+                regulator-always-on;
+                samsung,ext-control = <S2MPG10_EXTCTRL_LDO20M_EN2>;
+            };
         };
     };