| From: |
| Fredrik M Olsson <fredrik.m.olsson-AT-axis.com> |
| To: |
| Alexandre Belloni <alexandre.belloni-AT-bootlin.com>, Rob Herring <robh-AT-kernel.org>, Krzysztof Kozlowski <krzk+dt-AT-kernel.org>, Conor Dooley <conor+dt-AT-kernel.org>, Nobuhiro Iwamatsu <nobuhiro.iwamatsu.x90-AT-mail.toshiba> |
| Subject: |
| [PATCH v2 0/3] rtc: ds1307: Add support for Epson RX8901CE |
| Date: |
| Wed, 20 May 2026 16:48:52 +0200 |
| Message-ID: |
| <20260520-ds1307-rx8901-add-v2-0-e069ea32e1db@axis.com> |
| Cc: |
| <linux-rtc-AT-vger.kernel.org>, <devicetree-AT-vger.kernel.org>, <linux-kernel-AT-vger.kernel.org>, Fredrik M Olsson <fredrik.m.olsson-AT-axis.com>, <kernel-AT-axis.com>, Krzysztof Kozlowski <krzysztof.kozlowski-AT-oss.qualcomm.com>, Nobuhiro Iwamatsu <nobuhiro1.iwamatsu-AT-mail.toshiba> |
| Archive-link: |
| Article |
Add basic support for the Epson RX8901CE RTC.
Datasheet: https://download.epsondevice.com/td/pdf/app/RX8901CE_en.pdf
Also includes a bug fix for an issue with reading the weekday from the
RTC which affects both the existing rx8130 and this rx8901 driver.
Signed-off-by: Fredrik M Olsson <fredrik.m.olsson@axis.com>
---
Changes in v2:
- Squashed the Voltage Low status patch into the driver patch
- Switch from dev_err to dev_dbg
- Implement Backup Switch Mode (BSM) ioctl instead of hard coding
switching mode.
- Change the prototype for the do_trickle_setup function pointer in
order to make it possible to propagate error codes from the added
PWSW_CFG register read operation. This read operation is added so not
to override previously set register fields.
- Link to v1: https://lore.kernel.org/r/20251219-ds1307-rx8901-add-v1-0...
---
Fredrik M Olsson (3):
dt-bindings: rtc: ds1307: Add epson,rx8901
rtc: ds1307: Fix off-by-one issue with wday for rx8130
rtc: ds1307: Add driver for Epson RX8901CE
.../devicetree/bindings/rtc/rtc-ds1307.yaml | 1 +
drivers/rtc/rtc-ds1307.c | 218 ++++++++++++++++++++-
2 files changed, 209 insertions(+), 10 deletions(-)
---
base-commit: 27fa82620cbaa89a7fc11ac3057701d598813e87
change-id: 20251126-ds1307-rx8901-add-a0fe173093e3
Best regards,
--
Fredrik M Olsson <fredrik.m.olsson@axis.com>
