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From: Jingbao Qiu <>
Subject: [PATCH v7 0/3] riscv: rtc: sophgo: add rtc support for CV1800
Date: Mon, 22 Jan 2024 16:04:57 +0800	[thread overview]
Message-ID: <> (raw)

Real Time Clock (RTC) is an independently powered module
within the chip, which includes a 32KHz oscillator and
a Power On Reset/POR submodule. It can be used for time
display and timed alarm generation.

Power On Reset/POR submodule only using register resources
so it should be empty. The 32KHz oscillator only provides
pulses for RTC in hardware.

Changes since v6:
- completely delete POR dt node
- remove syscon tag
- use devm_regmap_init_mmio() replace


Changes since v5:
- remove unnecessary lock
- fix cv1800_rtc_alarm_irq_enable()
- remove duplicate checks
- using alrm->enabled instead of unconditionally
- remove disable alarms on probe
- using rtc_update_irq() replace mess of alarm
- remove leak clk
- useing devm_rtc_allocate_device() and
  devm_rtc_register_device() instead old way
- add judgment for rtc_enable_sec_counter()
- add POR nodes in DTS. This POR device shares
  the register region with the RTC device


Changes since v4:
- remove POR dt-bindings because it empty
- remove MFD dt-bindings because SoC does
  not have MFDs
- add syscon attribute to share registers
  with POR


Changes since v3:
- temporarily not submitting RTC driver code
  waiting for communication with IC designer
- add MFD dt-bindings
- add POR dt-bindings


Changes since v2:
- add mfd support for CV1800
- add rtc to mfd
- using regmap replace iomap
- merge register address in dts


Changes since v1
- fix duplicate names in subject
- using RTC replace RTC controller
- improve the properties of dt-bindings
- using `unevaluatedProperties` replace `additionalProperties`
- dt-bindings passed the test
- using `devm_platform_ioremap_resource()` replace
  `platform_get_resource()` and `devm_ioremap_resource()`
- fix random order of the code
- fix wrong wrapping of the `devm_request_irq()` and map the flag with dts
- using devm_clk_get_enabled replace `devm_clk_get()` and
- fix return style
- add rtc clock calibration function
- use spinlock when write register on read/set time


Jingbao Qiu (3):
  dt-bindings: rtc: sophgo: add RTC support for Sophgo CV1800 series SoC
  rtc: sophgo: add rtc support for Sophgo CV1800 SoC
  riscv: dts: sophgo: add rtc dt node for CV1800

 .../bindings/rtc/sophgo,cv1800-rtc.yaml       |  53 +++
 arch/riscv/boot/dts/sophgo/cv1800b.dtsi       |   7 +
 drivers/rtc/Kconfig                           |   7 +
 drivers/rtc/Makefile                          |   1 +
 drivers/rtc/rtc-cv1800.c                      | 406 ++++++++++++++++++
 5 files changed, 474 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/sophgo,cv1800-rtc.yaml
 create mode 100644 drivers/rtc/rtc-cv1800.c

base-commit: e3d3fe7e7bf08820a83c9d9a4c38c7b29a2927f1

             reply	other threads:[~2024-01-22  8:05 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-22  8:04 Jingbao Qiu [this message]
2024-01-22  8:04 ` [PATCH v7 1/3] dt-bindings: rtc: sophgo: add RTC support for Sophgo CV1800 series SoC Jingbao Qiu

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