[PATCH V2 0/7] rtc: ls2x: Add support for the Loongson-2K/LS7A RTC

From: Binbin Zhou <zhoubinbin@loongson.cn>
To: Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Jiaxun Yang <jiaxun.yang@flygoat.com>,
	Huacai Chen <chenhuacai@loongson.cn>,
	WANG Xuerui <kernel@xen0n.name>
Cc: linux-rtc@vger.kernel.org, linux-mips@vger.kernel.org,
	loongarch@lists.linux.dev, Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	devicetree@vger.kernel.org, Qing Zhang <zhangqing@loongson.cn>,
	Tiezhu Yang <yangtiezhu@loongson.cn>,
	zhaoxiao <zhaoxiao@uniontech.com>,
	Binbin Zhou <zhoubinbin@loongson.cn>
Subject: [PATCH V2 0/7] rtc: ls2x: Add support for the Loongson-2K/LS7A RTC
Date: Mon,  9 Jan 2023 09:35:10 +0800	[thread overview]
Message-ID: <cover.1673227292.git.zhoubinbin@loongson.cn> (raw)

Hi all:

The initial DT-base ls2x rtc driver was written by Wang Xuerui, He has
released five versions of patchset before, and all related mail records
are shown below if you are interested:

https://lore.kernel.org/all/?q=ls2x-rtc

In this series of patches, based on the code above, I have added the
following support:

1. Add ACPI-related support, as Loongson-3A5000 + LS7A is now ACPI-base
   by default under LoongArch architecture;
2. Add rtc alarm/walarm related functions.

I have tested on Loongson-3A5000LA+LS7A1000/LS7A2000, Loongson-2K1000LA
and Loongson-2K0500.

BTW:
There have been discussions about merging the rtc drivers of ls1x and
ls2x, but the following reasons made the merger difficult to achieve:

1. ls1x does not support ACPI, for it is only on MIPS-based system;
2. ls1x does not support alarm function.

Thanks.

-------
Changes since v1:
1. Rebased on top of latest loongarch-next;
2. Add interrupt descriptions to the ls2k and ls7a DTS files to avoid
errors when the driver gets the IRQ number, Thanks to Qing Zhang for
testing;
3. Remove some inexact CONFIG_ACPI.

Binbin Zhou (4):
  rtc: Add support for the Loongson-2K/LS7A RTC
  LoongArch: Enable LS2X RTC in loongson3_defconfig
  MIPS: Loongson64: DTS: Add RTC support to LS7A
  MIPS: Loongson64: DTS: Add RTC support to Loongson-2K

WANG Xuerui (3):
  dt-bindings: rtc: Add Loongson LS2X RTC support
  MIPS: Loongson: Enable LS2X RTC in loongson3_defconfig
  MIPS: Loongson: Enable LS2X RTC in loongson2k_defconfig

 .../devicetree/bindings/rtc/trivial-rtc.yaml  |   2 +
 arch/loongarch/configs/loongson3_defconfig    |   1 +
 .../boot/dts/loongson/loongson64-2k1000.dtsi  |   7 +
 arch/mips/boot/dts/loongson/ls7a-pch.dtsi     |   7 +
 arch/mips/configs/loongson2k_defconfig        |   1 +
 arch/mips/configs/loongson3_defconfig         |   1 +
 drivers/rtc/Kconfig                           |  11 +
 drivers/rtc/Makefile                          |   1 +
 drivers/rtc/rtc-ls2x.c                        | 379 ++++++++++++++++++
 9 files changed, 410 insertions(+)
 create mode 100644 drivers/rtc/rtc-ls2x.c

-- 
2.31.1