The PCF8525 is an NXP I2C real-time clock with integrated crystal
oscillator, dual timestamp capture inputs, backup battery switch-over,
a windowed watchdog, and an on-chip temperature sensor.

This series adds:
  - DT binding (YAML schema)
  - Core RTC driver: timekeeping, alarms, dual timestamps, crystal
    configuration, backup switch-over, and clock offset correction
  - Watchdog support via the Linux watchdog framework
  - Temperature sensor support via the hwmon framework

Changes in v3:
- patch 2: protect the Write-0-to-Clear (W0C) status flags in the
  CTRL2/CTRL3 read-modify-write cycles so concurrently asserted
  interrupt events are not silently cleared
- patch 2: replace the timestamp spinlock with a mutex and re-read
  CTRL4 under it, closing the TOCTOU race between the threaded IRQ
  handler and the sysfs timestamp store
- patch 3: configure the nINTB/CLKOUT pin (CLKOE=0) before requesting
  the watchdog IRQ to avoid a spurious interrupt storm
- patch 3: add suspend/resume PM ops to stop and re-ping the watchdog
  across system sleep
- patch 3: add WDIOF_PRETIMEOUT so the watchdog core attaches a
  pretimeout governor
- patch 3: re-mask INTA/INTB interrupts on driver unbind via devm
  cleanup actions
- patch 4: enable TEMP_RD_EN before registering the hwmon device and
  add a devm cleanup to disable it on unbind

Changes in v2:
- Fix include: use <linux/pm_wakeirq.h> instead of <pm_wakeup.h>
- Add spinlock_t ts_lock to protect ts[]/ts_valid[] from IRQ/sysfs race
- Fix W0C ordering: clear AF/TSF flags before acting on alarm/timestamp
  events
- Use dev_pm_set_wake_irq() for suspend wakeup wiring
- Clear stale WDTF before unmasking watchdog interrupt on INTB to prevent
  boot loop when battery-backed flag persists across resets
- Add watchdog_notify_pretimeout() call in INTB IRQ handler
- Set WDOG_HW_RUNNING if bootloader left watchdog running at probe time
- Register hwmon device first, then enable PCF8525_CTRL5_TEMP_RD_EN only
  after successful registration

Shiv Prakash Gupta (4):
  dt-bindings: rtc: Add NXP PCF8525 RTC
  rtc: pcf8525: Add NXP PCF8525 RTC driver
  rtc: pcf8525: Add watchdog support
  rtc: pcf8525: Add temperature sensor support via hwmon

 .../devicetree/bindings/rtc/nxp,pcf8525.yaml  |   86 +
 drivers/rtc/Kconfig                           |   26 +
 drivers/rtc/Makefile                          |    1 +
 drivers/rtc/rtc-pcf8525.c                     | 1600 +++++++++++++++++
 4 files changed, 1713 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rtc/nxp,pcf8525.yaml
 create mode 100644 drivers/rtc/rtc-pcf8525.c

-- 
2.34.1