linux-kernel - [PATCH v2 0/5] rtc: Enhance RTC driver with BBPU bit definitions and shutdown handling

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Message-ID: <20251120121805.6775-1-ot_shunxi.zhang@mediatek.com>
Date: Thu, 20 Nov 2025 20:17:56 +0800
From: <ot_shunxi.zhang@...iatek.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Matthias Brugger
	<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>, Eddie Huang
	<eddie.huang@...iatek.com>, Sean Wang <sean.wang@...iatek.com>, Alexandre
 Belloni <alexandre.belloni@...tlin.com>, Lee Jones <lee@...nel.org>, Shunxi
 Zhang <ot_shunxi.zhang@...iatek.com>, <Vince-WL.Liu@...iatek.com>,
	<sirius.wang@...iatek.com>, <Jh.Hsu@...iatek.com>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>
Subject: [PATCH v2 0/5] rtc: Enhance RTC driver with BBPU bit definitions and shutdown handling

From: Shunxi Zhang <ot_shunxi.zhang@...iatek.com>

(1) Add new bits definitions for RTC_BBPU register.
(2) Add new functions to reset the BBPU alarm status in mt6397 RTC driver
(3) Add mtk_rtc_shutdown function to handle RTC shutdown events.
(4) For the V1 version comments, the following modifications are made: 
(4.1)the formatting changes are separated into a distinct patch. 
(4.2)Since the rtc-mt6397.c file is a fusion of multiple RTC drivers 
for the mt6358, mt6359, and mt6357 RTCs, the definitions of certain bits 
in the RTC_BBPU register differ among these RTCs. The mt6359 supports 
the alarm status bit, while both mt6358 and mt6357 do not. Therefore, 
the alarm-sta-supported property is added in the mt6359.dtsi file to 
differentiate between the different RTCs. 
(4.3)Additionally, the operation to disable IRQ in the shutdown function 
is removed.

Shunxi Zhang (5):
  mfd: mt6397: Fix formatting of RTC_BBPU_KEY definition
  mfd: mt6397: Add bit definitions and struct members to support alarm
    status
  rtc: mt6397: Fix formatting of platform driver structure
  rtc: mt6397: Add BBPU alarm status reset and shutdown handling
  arm64: dts: mediatek: mt6359: Add alarm-sta-supported property to RTC
    node

 arch/arm64/boot/dts/mediatek/mt6359.dtsi |  1 +
 drivers/rtc/rtc-mt6397.c                 | 32 +++++++++++++++++++++++-
 include/linux/mfd/mt6397/rtc.h           |  5 +++-
 3 files changed, 36 insertions(+), 2 deletions(-)

-- 
2.45.2