[RFC PATCH 1/7] dt-bindings: rtc: sun6i: Add H616 and R329 compatibles

[Samuel Holland]

For these new SoCs, start requiring a complete list of input clocks.

For H616, this means bus, hosc, and pll-32k. For R329, this means ahb,
bus, and hosc; and optionally ext-osc32k.

I'm not sure how to best represent this in the binding...

Signed-off-by: Samuel Holland <samuel@xxxxxxxxxxxx>
---
 .../bindings/rtc/allwinner,sun6i-a31-rtc.yaml | 55 +++++++++++++++++--
 include/dt-bindings/clock/sun50i-rtc.h        | 12 ++++
 2 files changed, 61 insertions(+), 6 deletions(-)
 create mode 100644 include/dt-bindings/clock/sun50i-rtc.h

diff --git a/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml b/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
index beeb90e55727..3e085db1294f 100644
--- a/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
@@ -26,6 +26,8 @@ properties:
           - const: allwinner,sun50i-a64-rtc
           - const: allwinner,sun8i-h3-rtc
       - const: allwinner,sun50i-h6-rtc
+      - const: allwinner,sun50i-h616-rtc
+      - const: allwinner,sun50i-r329-rtc
 
   reg:
     maxItems: 1
@@ -37,7 +39,24 @@ properties:
       - description: RTC Alarm 1
 
   clocks:
-    maxItems: 1
+    minItems: 1
+    maxItems: 4
+
+  clock-names:
+    minItems: 1
+    maxItems: 4
+    items:
+      - anyOf:
+          - const: ahb
+            description: AHB parent for SPI bus clock
+          - const: bus
+            description: AHB/APB bus clock for register access
+          - const: ext-osc32k
+            description: External 32768 Hz oscillator input
+          - const: hosc
+            description: 24 MHz oscillator input
+          - const: pll-32k
+            description: 32 kHz clock divided from a PLL
 
   clock-output-names:
     minItems: 1
@@ -85,6 +104,9 @@ allOf:
             enum:
               - allwinner,sun8i-h3-rtc
               - allwinner,sun50i-h5-rtc
+              - allwinner,sun50i-h6-rtc
+              - allwinner,sun50i-h616-rtc
+              - allwinner,sun50i-r329-rtc
 
     then:
       properties:
@@ -96,13 +118,35 @@ allOf:
       properties:
         compatible:
           contains:
-            const: allwinner,sun50i-h6-rtc
+            enum:
+              - allwinner,sun50i-h616-rtc
+              - allwinner,sun50i-r329-rtc
 
     then:
+      clocks:
+        minItems: 3 # bus, hosc, and (pll-32k [H616] or ahb [R329])
+
+      clock-names:
+        minItems: 3
+
+      required:
+        - clock-names
+
+    else:
+      required:
+        - clock-output-names
+
+  - if:
+      properties: clock-names
+
+    then:
+      required:
+        - clocks # hosc is required
+
+    else:
       properties:
-        clock-output-names:
-          minItems: 3
-          maxItems: 3
+        clocks:
+          maxItems: 1 # only ext-osc32k is allowed
 
   - if:
       properties:
@@ -127,7 +171,6 @@ required:
   - compatible
   - reg
   - interrupts
-  - clock-output-names
 
 additionalProperties: false
 
diff --git a/include/dt-bindings/clock/sun50i-rtc.h b/include/dt-bindings/clock/sun50i-rtc.h
new file mode 100644
index 000000000000..d45e3ff4e105
--- /dev/null
+++ b/include/dt-bindings/clock/sun50i-rtc.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _DT_BINDINGS_CLK_SUN50I_RTC_CCU_H_
+#define _DT_BINDINGS_CLK_SUN50I_RTC_CCU_H_
+
+#define CLK_OSC32K		0
+#define CLK_OSC32K_FANOUT	1
+#define CLK_IOSC		2
+
+#define CLK_RTC_SPI		8
+
+#endif /* _DT_BINDINGS_CLK_SUN50I_RTC_CCU_H_ */
-- 
2.31.1