[PATCH v10 1/9] dt-bindings: mfd: mt6397: Add MT6392 PMIC

[Luca Leonardo Scorcia <l.scorcia@gmail.com>]

Describe the MT6392 PMIC and its RTC and regulator devices. This device
is mostly based on MT6323 with some similarities to MT6397 and is usually
found on boards using the MT8516/MT8167 SoC.

Signed-off-by: Luca Leonardo Scorcia <l.scorcia@gmail.com>
---
Previous version of this patch had the PMIC device declared with a
fallback compatible to "mediatek,mt6323". Sashiko pointed out in [1]
that it would have been wrong as the fallback device is not really
compatible with the new PMIC.

Since the change is significant I have not included the Reviewed-by tag
that Krzysztof Kozlowski kindly provided in v9 of this patch, I hope
this is the right thing. I really want to get the bindings right as they
are harder to fix in later commits if the need arises.

[1] https://sashiko.dev/#/message/20260820125850.3B34D1F000E9%40smtp.kernel.org

 .../bindings/mfd/mediatek,mt6397.yaml         | 72 +++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/mediatek,mt6397.yaml b/Documentation/devicetree/bindings/mfd/mediatek,mt6397.yaml
index 3cbc0dc12c31..06e93c545e3b 100644
--- a/Documentation/devicetree/bindings/mfd/mediatek,mt6397.yaml
+++ b/Documentation/devicetree/bindings/mfd/mediatek,mt6397.yaml
@@ -39,6 +39,7 @@ properties:
           - mediatek,mt6328
           - mediatek,mt6358
           - mediatek,mt6359
+          - mediatek,mt6392
           - mediatek,mt6397
       - items:
           - enum:
@@ -72,6 +73,10 @@ properties:
               - mediatek,mt6331-rtc
               - mediatek,mt6358-rtc
               - mediatek,mt6397-rtc
+          - items:
+              - enum:
+                  - mediatek,mt6392-rtc
+              - const: mediatek,mt6323-rtc
           - items:
               - enum:
                   - mediatek,mt6359-rtc
@@ -99,6 +104,7 @@ properties:
               - mediatek,mt6331-regulator
               - mediatek,mt6358-regulator
               - mediatek,mt6359-regulator
+              - mediatek,mt6392-regulator
               - mediatek,mt6397-regulator
           - items:
               - enum:
@@ -663,3 +669,69 @@ examples:
             compatible = "mediatek,mt6397-rtc";
         };
     };
+
+  - |
+    #include <dt-bindings/input/input.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    pmic {
+        compatible = "mediatek,mt6392";
+
+        interrupts-extended = <&pio 28 IRQ_TYPE_LEVEL_HIGH>;
+        interrupt-controller;
+        #interrupt-cells = <2>;
+
+        keys {
+          compatible = "mediatek,mt6392-keys";
+
+          key-power {
+            linux,keycodes = <KEY_POWER>;
+            wakeup-source;
+          };
+
+          key-home {
+            linux,keycodes = <KEY_HOME>;
+            wakeup-source;
+          };
+        };
+
+        pinctrl {
+          compatible = "mediatek,mt6392-pinctrl";
+
+          gpio-controller;
+          #gpio-cells = <2>;
+        };
+
+        regulators {
+          compatible = "mediatek,mt6392-regulator";
+
+          vproc {
+            regulator-allowed-modes = <0 1>;
+            regulator-initial-mode = <0>;
+            regulator-min-microvolt = < 700000>;
+            regulator-max-microvolt = <1350000>;
+            regulator-always-on;
+            regulator-boot-on;
+          };
+
+          // ...
+
+          vadc18 {
+            regulator-allowed-modes = <0 2>;
+            regulator-initial-mode = <0>;
+            regulator-min-microvolt = <1800000>;
+            regulator-max-microvolt = <1800000>;
+            regulator-boot-on;
+            regulator-always-on;
+          };
+
+          vefuse {
+            regulator-min-microvolt = <1800000>;
+            regulator-max-microvolt = <2000000>;
+          };
+        };
+
+        rtc {
+          compatible = "mediatek,mt6392-rtc", "mediatek,mt6323-rtc";
+        };
+    };
-- 
2.43.0