linux-kernel - [PATCH 1/7] dt-bindings: rtc: sun6i: Add Allwinner A733 support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20260121-a733-rtc-v1-1-d359437f23a7@pigmoral.tech>
Date: Wed, 21 Jan 2026 18:59:07 +0800
From: Junhui Liu <junhui.liu@...moral.tech>
To: Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Chen-Yu Tsai <wens@...nel.org>, 
 Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Maxime Ripard <mripard@...nel.org>
Cc: linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 linux-rtc@...r.kernel.org, devicetree@...r.kernel.org, 
 Junhui Liu <junhui.liu@...moral.tech>
Subject: [PATCH 1/7] dt-bindings: rtc: sun6i: Add Allwinner A733 support

The RTC module in the Allwinner A733 SoC is functionally compatible with
the sun6i RTC, but its internal Clock Control Unit (CCU) has significant
changes.

The A733 supports selecting the oscillator between three frequencies:
19.2MHz, 24MHz, and 26MHz. The RTC CCU relies on hardware to detect
which frequency is actually used on the board. By defining all three
frequencies as fixed-clocks in the device tree, the driver can identify
the hardware-detected frequency and expose it to the rest of the system.

Additionally, the A733 RTC CCU provides several new DCXO gate clocks for
specific modules, including SerDes, HDMI, and UFS.

Signed-off-by: Junhui Liu <junhui.liu@...moral.tech>
---
 .../bindings/rtc/allwinner,sun6i-a31-rtc.yaml      | 38 ++++++++++++++++++++--
 include/dt-bindings/clock/sun60i-a733-rtc.h        | 16 +++++++++
 2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml b/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
index 9df5cdb6f63f..b18431955783 100644
--- a/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/allwinner,sun6i-a31-rtc.yaml
@@ -26,6 +26,7 @@ properties:
           - allwinner,sun50i-h6-rtc
           - allwinner,sun50i-h616-rtc
           - allwinner,sun50i-r329-rtc
+          - allwinner,sun60i-a733-rtc
       - items:
           - const: allwinner,sun50i-a64-rtc
           - const: allwinner,sun8i-h3-rtc
@@ -46,11 +47,11 @@ properties:
 
   clocks:
     minItems: 1
-    maxItems: 4
+    maxItems: 6
 
   clock-names:
     minItems: 1
-    maxItems: 4
+    maxItems: 6
 
   clock-output-names:
     minItems: 1
@@ -156,6 +157,38 @@ allOf:
         - clocks
         - clock-names
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: allwinner,sun60i-a733-rtc
+
+    then:
+      properties:
+        clocks:
+          minItems: 5
+          items:
+            - description: Bus clock for register access
+            - description: 19.2 MHz oscillator
+            - description: 24 MHz oscillator
+            - description: 26 MHz oscillator
+            - description: AHB parent for internal SPI clock
+            - description: External 32768 Hz oscillator
+
+        clock-names:
+          minItems: 5
+          items:
+            - const: bus
+            - const: osc19M
+            - const: osc24M
+            - const: osc26M
+            - const: ahb
+            - const: ext-osc32k
+
+      required:
+        - clocks
+        - clock-names
+
   - if:
       properties:
         compatible:
@@ -164,6 +197,7 @@ allOf:
               - allwinner,sun8i-r40-rtc
               - allwinner,sun50i-h616-rtc
               - allwinner,sun50i-r329-rtc
+              - allwinner,sun60i-a733-rtc
 
     then:
       properties:
diff --git a/include/dt-bindings/clock/sun60i-a733-rtc.h b/include/dt-bindings/clock/sun60i-a733-rtc.h
new file mode 100644
index 000000000000..8a2b5facad73
--- /dev/null
+++ b/include/dt-bindings/clock/sun60i-a733-rtc.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
+
+#ifndef _DT_BINDINGS_CLK_SUN60I_A733_RTC_H_
+#define _DT_BINDINGS_CLK_SUN60I_A733_RTC_H_
+
+#define CLK_IOSC		0
+#define CLK_OSC32K		1
+#define CLK_HOSC		2
+#define CLK_RTC_32K		3
+#define CLK_OSC32K_FANOUT	4
+#define CLK_HOSC_SERDES1	5
+#define CLK_HOSC_SERDES0	6
+#define CLK_HOSC_HDMI		7
+#define CLK_HOSC_UFS		8
+
+#endif /* _DT_BINDINGS_CLK_SUN60I_A733_RTC_H_ */

-- 
2.52.0