linux-kernel - [PATCH v2 2/9] dt-bindings: rtc: sun6i: Add H616, R329, and D1 support

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Message-Id: <20210928080335.36706-3-samuel@sholland.org>
Date:   Tue, 28 Sep 2021 03:03:28 -0500
From:   Samuel Holland <samuel@...lland.org>
To:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-rtc@...r.kernel.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Samuel Holland <samuel@...lland.org>
Subject: [PATCH v2 2/9] dt-bindings: rtc: sun6i: Add H616, R329, and D1 support

These new RTC variants all have a single alarm, like the R40 variant.

For the new SoCs, start requiring a complete list of input clocks. The
H616 has three required clocks. The R329 also has three required clocks
(but one is different), plus an optional crystal oscillator input. The
D1 RTC is identical to the one in the R329.

And since these new SoCs will have a well-defined output clock order as
well, they do not need the clock-output-names property.

Signed-off-by: Samuel Holland <samuel@...lland.org>
---
Changes since v1:
  - Properly update the DT binding clocks and clock-names properties.

 .../bindings/rtc/allwinner,sun6i-a31-rtc.yaml | 72 ++++++++++++++++++-
 include/dt-bindings/clock/sun6i-rtc.h         | 10 +++
 2 files changed, 79 insertions(+), 3 deletions(-)
 create mode 100644 include/dt-bindings/clock/sun6i-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 a88d46ffb457..b971510a5ae7 100644
--- a/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
@@ -24,9 +24,14 @@ properties:
           - allwinner,sun8i-v3-rtc
           - allwinner,sun50i-h5-rtc
           - allwinner,sun50i-h6-rtc
+          - allwinner,sun50i-h616-rtc
+          - allwinner,sun50i-r329-rtc
       - items:
           - const: allwinner,sun50i-a64-rtc
           - const: allwinner,sun8i-h3-rtc
+      - items:
+          - const: allwinner,sun20i-d1-rtc
+          - const: allwinner,sun50i-r329-rtc
 
   reg:
     maxItems: 1
@@ -38,7 +43,10 @@ properties:
       - description: RTC Alarm 1
 
   clocks:
-    maxItems: 1
+    minItems: 1
+
+  clock-names:
+    minItems: 1
 
   clock-output-names:
     minItems: 1
@@ -98,7 +106,66 @@ allOf:
       properties:
         compatible:
           contains:
-            const: allwinner,sun8i-r40-rtc
+            const: allwinner,sun50i-h616-rtc
+
+    then:
+      clocks:
+        minItems: 3
+        maxItems: 3
+        items:
+          - description: Bus clock for register access
+          - description: 24 MHz oscillator
+          - description: 32 kHz clock derived from a PLL
+
+      clock-names:
+        minItems: 3
+        minItems: 3
+        items:
+          - const: bus
+          - const: hosc
+          - const: pll-32k
+
+      required:
+        - clocks
+        - clock-names
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,sun50i-r329-rtc
+
+    then:
+      clocks:
+        minItems: 3
+        maxItems: 4
+        items:
+          - description: AHB parent for internal SPI clock
+          - description: Bus clock for register access
+          - description: 24 MHz oscillator
+          - description: External 32768 Hz oscillator
+
+      clock-names:
+        minItems: 3
+        minItems: 4
+        items:
+          - const: ahb
+          - const: bus
+          - const: hosc
+          - const: ext-osc32k
+
+      required:
+        - clocks
+        - clock-names
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - allwinner,sun8i-r40-rtc
+              - allwinner,sun50i-h616-rtc
+              - allwinner,sun50i-r329-rtc
 
     then:
       properties:
@@ -117,7 +184,6 @@ required:
   - compatible
   - reg
   - interrupts
-  - clock-output-names
 
 additionalProperties: false
 
diff --git a/include/dt-bindings/clock/sun6i-rtc.h b/include/dt-bindings/clock/sun6i-rtc.h
new file mode 100644
index 000000000000..c845493e4d37
--- /dev/null
+++ b/include/dt-bindings/clock/sun6i-rtc.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: (GPL-2.0+ or MIT) */
+
+#ifndef _DT_BINDINGS_CLK_SUN6I_RTC_H_
+#define _DT_BINDINGS_CLK_SUN6I_RTC_H_
+
+#define CLK_OSC32K		0
+#define CLK_OSC32K_FANOUT	1
+#define CLK_IOSC		2
+
+#endif /* _DT_BINDINGS_CLK_SUN6I_RTC_H_ */
-- 
2.31.1