This patch series adds support for the RTC module found on various
Loongson systems with the Loongson-2K SoC or the LS7A bridge chip.
The driver is rewritten from an out-of-tree version to meet mainline
standards. I write kernel code as a hobby, though, so there might still
be overlooked issues. Any suggestions are welcome.
This series is based on next-20210628, but should apply cleanly on rtc-next
too.
v5:
- Minor changes per Nobuhiro-san's review
- Simplified one register-write-and-return
- Explicitly depend on OF, remove of_match_ptr usage for now
- Tested on Loongson-3A4000; 2K should work too because there's no
functional change either
v4:
- Rebased on top of next-20210628
- Added Jiaxun's Tested-by tag for Loongson-2K; no functional changes
- Addressed all review comments from v3
- Rewritten field operations with FIELD_GET/FIELD_PREP
- Removed all error logs
- Removed unnecessary spinlocking (RTC core already protects against
concurrent device file operations)
v3:
- Fixed compile error not discovered after rebase (blame sleep
deprivation)
- Tested on Loongson-3A4000 and Loongson-2K
v2:
- Rebased on top of latest linux-next
- Updated Huacai's e-mail address to the kernel.org one
- Added collected tags
- Added adaptation for newly upstreamed Loongson-2K platforms
WANG Xuerui (6):
rtc: ls2x: Add support for the Loongson-2K/LS7A RTC
dt-bindings: rtc: Add bindings for LS2X RTC
MIPS: Loongson64: DTS: Add RTC support to LS7A
MIPS: Loongson: Enable LS2X RTC in loongson3_defconfig
MIPS: Loongson64: DTS: Add RTC support to Loongson-2K
MIPS: Loongson: Enable LS2X RTC in loongson2k_defconfig
.../devicetree/bindings/rtc/trivial-rtc.yaml | 2 +
.../boot/dts/loongson/loongson64-2k1000.dtsi | 5 +
arch/mips/boot/dts/loongson/ls7a-pch.dtsi | 5 +
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 | 180 ++++++++++++++++++
8 files changed, 206 insertions(+)
create mode 100644 drivers/rtc/rtc-ls2x.c
base-commit: 3579aa488520feeda433ceca23ef4704bf8cd280
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2.30.1
