linux-kernel - [PATCH v4 0/4] Add RTC support for the Renesas RZ/V2H SoC

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Message-ID: <20251107210706.45044-1-ovidiu.panait.rb@renesas.com>
Date: Fri,  7 Nov 2025 21:07:02 +0000
From: Ovidiu Panait <ovidiu.panait.rb@...esas.com>
To: claudiu.beznea.uj@...renesas.com,
	alexandre.belloni@...tlin.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	geert+renesas@...der.be,
	magnus.damm@...il.com,
	p.zabel@...gutronix.de
Cc: linux-rtc@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v4 0/4] Add RTC support for the Renesas RZ/V2H SoC

Hi,

This series adds RTC support for the Renesas RZ/V2H SoC.

The Renesas RZ/V2H RTC IP is based on the same RTCA3 IP as RZ/G3S
(r9a08g045), with the following differences:
- it lacks the time capture functionality
- the maximum supported periodic interrupt frequency is 128Hz instead
  of 256Hz
- it requires two reset lines instead of one

Best regards,
Ovidiu

v4:
- Renamed reset "rtc_rtest" -> "rtest".
- Added "vbattb" reset name to example node.

v3:
- Dropped all changes related to "max_user_freq", as it was removed from
  all drivers by:
  https://lore.kernel.org/all/20251101-max_user_freq-v1-0-c9a274fd6883@bootlin.com/

v2:
- Updated bindings and RTC dts node with "reset-names" property.

Ovidiu Panait (4):
  dt-bindings: rtc: renesas,rz-rtca3: Add RZ/V2H support
  rtc: renesas-rtca3: Add support for multiple reset lines
  arm64: dts: renesas: r9a09g057: Add RTC node
  arm64: dts: renesas: r9a09g057h44-rzv2h-evk: Enable RTC

 .../bindings/rtc/renesas,rz-rtca3.yaml        | 46 +++++++++++++++++--
 arch/arm64/boot/dts/renesas/r9a09g057.dtsi    | 15 ++++++
 .../dts/renesas/r9a09g057h44-rzv2h-evk.dts    |  4 ++
 drivers/rtc/rtc-renesas-rtca3.c               |  2 +-
 4 files changed, 61 insertions(+), 6 deletions(-)

-- 
2.51.0