linux-kernel - [PATCH v2 0/3] On-chip RTC support for ExynosAutov9

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Message-Id: <20250710083434.1821671-1-dev.tailor@samsung.com>
Date: Thu, 10 Jul 2025 14:04:31 +0530
From: Devang Tailor <dev.tailor@...sung.com>
To: robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	alim.akhtar@...sung.com, alexandre.belloni@...tlin.com,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-rtc@...r.kernel.org, faraz.ata@...sung.com
Cc: Devang Tailor <dev.tailor@...sung.com>
Subject: [PATCH v2 0/3] On-chip RTC support for ExynosAutov9

Enable on-chip RTC support. The on-chip RTC of this SoC is similar
to the previous versions of Samsung SoC. So re-use the existing
RTC driver with applicable call-backs for initialization and IRQ handling.
Add a separate call-back for disabling RTC since existing '.disable'
call-backs updates additional bit not valid for RTC of ExynosAutov9.

Setting and getting hardware clock has been tested using 'hwclock'
and 'date' utilities.

Alarm interrupt has been checked with incrementing interrupt
count via "cat /proc/interrupts | grep rtc" for 10sec
wakeup time via "echo +10 > /sys/class/rtc/rtc0/wakealarm"

changelog
---
Changes in v2:
- Fixed the review comment of v1 for mis-aligmnent & asymmetry bit logic.
- link for v1 : https://lore.kernel.org/linux-rtc/20250702052426.2404256-1-dev.tailor@samsung.com/


Devang Tailor (3):
  dt-bindings: rtc: s3c-rtc: add compatible for exynosautov9
  rtc: s3c: support for exynosautov9 on-chip RTC
  arm64: dts: exynosautov9: add RTC DT node

 .../devicetree/bindings/rtc/s3c-rtc.yaml       |  1 +
 .../boot/dts/exynos/exynosautov9-sadk.dts      |  4 ++++
 arch/arm64/boot/dts/exynos/exynosautov9.dtsi   | 10 ++++++++++
 drivers/rtc/rtc-s3c.c                          | 18 ++++++++++++++++++
 4 files changed, 33 insertions(+)


base-commit: 58ba80c4740212c29a1cf9b48f588e60a7612209
-- 
2.34.1