From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-renesas-soc@vger.kernel.org
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
linux-rtc@vger.kernel.org, devicetree@vger.kernel.org
Subject: [RFC PATCH 1/4] dt-bindings: rtc: rzn1: add optional second clock
Date: Thu, 13 Mar 2025 11:25:42 +0100 [thread overview]
Message-ID: <20250313102546.27335-2-wsa+renesas@sang-engineering.com> (raw)
In-Reply-To: <20250313102546.27335-1-wsa+renesas@sang-engineering.com>
The external crystal can be a second clock input. It is needed for the
SCMP counting method which allows using crystals different than 32768Hz.
It is also needed for an upcoming SoC which only supports the SCMP
method.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
.../devicetree/bindings/rtc/renesas,rzn1-rtc.yaml | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/rtc/renesas,rzn1-rtc.yaml b/Documentation/devicetree/bindings/rtc/renesas,rzn1-rtc.yaml
index f6e0c613af67..f6fdcc7090b6 100644
--- a/Documentation/devicetree/bindings/rtc/renesas,rzn1-rtc.yaml
+++ b/Documentation/devicetree/bindings/rtc/renesas,rzn1-rtc.yaml
@@ -33,10 +33,14 @@ properties:
- const: pps
clocks:
- maxItems: 1
+ minItems: 1
+ maxItems: 2
clock-names:
- const: hclk
+ minItems: 1
+ items:
+ - const: hclk
+ - const: xtal
power-domains:
maxItems: 1
--
2.47.2
next prev parent reply other threads:[~2025-03-13 10:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-13 10:25 [RFC PATCH 0/4] rtc: rzn1: support XTAL clk and SCMP method Wolfram Sang
2025-03-13 10:25 ` Wolfram Sang [this message]
2025-03-14 8:41 ` [RFC PATCH 1/4] dt-bindings: rtc: rzn1: add optional second clock Krzysztof Kozlowski
2025-03-14 8:54 ` Wolfram Sang
2025-03-13 10:25 ` [RFC PATCH 2/4] ARM: dts: renesas: r9a06g032: add second clock input to RTC Wolfram Sang
2025-04-10 15:32 ` Geert Uytterhoeven
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