kernel/linux.git/drivers/rtc/Kconfig, branch v6.19.11

rtc: nvvrs: Add ARCH_TEGRA to the NV VRS RTC driver

2026-03-04T12:19:24+00:00

[ Upstream commit f9ecfd9bfedba9fd9d4b015b33b847571f7fdd42 ] The NV VRS RTC driver currently is only supported on the Tegra platform so add a dep for ARCH_TEGRA and compile test so it doesn't show up universally across all arches/platforms. Fixes: 9d6d6b06933c8 ("rtc: nvvrs: add NVIDIA VRS RTC device driver") Cc: Shubhi Garg Cc: Jon Hunter Signed-off-by: Peter Robinson Acked-by: Jon Hunter Link: https://patch.msgid.link/20251222035651.433603-1-pbrobinson@gmail.com Signed-off-by: Alexandre Belloni Signed-off-by: Sasha Levin

rtc: spacemit: MFD_SPACEMIT_P1 as dependencies

2025-12-08T22:02:10+00:00

RTC_DRV_SPACEMIT_P1 is a subdevice of P1 and should depend on MFD_SPACEMIT_P1 rather than selecting it directly. Using 'select' does not always respect the parent's dependencies, so 'depends on' is the safer and more correct choice. Additionally, the default value depends on MFD_SPACEMIT_P1 rather than ARCH_SPACEMIT. Signed-off-by: Troy Mitchell Acked-by: Alex Elder Link: https://patch.msgid.link/20251118-p1-kconfig-fix-v3-2-8839c5ac5db3@linux.spacemit.com Signed-off-by: Alexandre Belloni

rtc: Add new rtc-macsmc driver for Apple Silicon Macs

2025-12-08T21:41:59+00:00

Apple Silicon Macs (M1, etc.) have an RTC that is part of the PMU IC, but most of the PMU functionality is abstracted out by the SMC. On T600x machines, the RTC counter must be accessed via the SMC to get full functionality, and it seems likely that future machines will move towards making SMC handle all RTC functionality. The SMC RTC counter access is implemented on all current machines as of the time of this writing, on firmware 12.x. However, the RTC offset (needed to set the time) is still only accessible via direct PMU access. To handle this, we expose the RTC offset as an NVMEM cell from the SPMI PMU device node, and this driver consumes that cell and uses it to compute/set the current time. Reviewed-by: Neal Gompa Signed-off-by: Hector Martin Signed-off-by: Sven Peter Signed-off-by: James Calligeros Link: https://patch.msgid.link/20251112-macsmc-subdevs-v5-3-728e4b91fe81@gmail.com Signed-off-by: Alexandre Belloni

rtc: Kconfig: add MC34708 to mc13xxx help text

2025-12-08T21:26:06+00:00

MC34708 is one of the three mfd devices supported by DRV_MC13XXX. Update Kconfig accordingly. Signed-off-by: Alexander Kurz Link: https://patch.msgid.link/20251011062605.13591-1-akurz@blala.de Signed-off-by: Alexandre Belloni

rtc: nvvrs: add NVIDIA VRS RTC device driver

2025-11-06T22:50:08+00:00

Add support for NVIDIA VRS (Voltage Regulator Specification) RTC device driver. NVIDIA VRS is a Power Management IC (PMIC) that implements a power sequencing solution with I2C interface. The device includes RTC which provides functionality to get/set system time, retain system time across boot, wake system from suspend and shutdown state. Supported platforms: - NVIDIA Jetson AGX Orin Developer Kit - NVIDIA IGX Orin Development Kit - NVIDIA Jetson Orin NX Developer Kit - NVIDIA Jetson Orin Nano Developer Kit Signed-off-by: Shubhi Garg Reviewed-by: Jon Hunter Tested-by: Jon Hunter Link: https://patch.msgid.link/20251007135738.487694-4-shgarg@nvidia.com Signed-off-by: Alexandre Belloni

rtc: atcrtc100: Add ATCRTC100 RTC driver

2025-11-06T22:16:13+00:00

RTC driver for Andes ATCRTC100 Real-Time Clock. Signed-off-by: CL Wang Link: https://patch.msgid.link/20250915031439.2680364-4-cl634@andestech.com Signed-off-by: Alexandre Belloni

Merge tag 'rtc-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux

2025-10-11T18:56:47+00:00

Pull RTC updates from Alexandre Belloni: "This cycle, we have a new RTC driver, for the SpacemiT P1. The optee driver gets alarm support. We also get a fix for a race condition that was fairly rare unless while stress testing the alarms. Subsystem: - Fix race when setting alarm - Ensure alarm irq is enabled when UIE is enabled - remove unneeded 'fast_io' parameter in regmap_config New driver: - SpacemiT P1 RTC Drivers: - efi: Remove wakeup functionality - optee: add alarms support - s3c: Drop support for S3C2410 - zynqmp: Restore alarm functionality after kexec transition" * tag 'rtc-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (29 commits) rtc: interface: Ensure alarm irq is enabled when UIE is enabled rtc: tps6586x: Fix initial enable_irq/disable_irq balance rtc: cpcap: Fix initial enable_irq/disable_irq balance rtc: isl12022: Fix initial enable_irq/disable_irq balance rtc: interface: Fix long-standing race when setting alarm rtc: pcf2127: fix watchdog interrupt mask on pcf2131 rtc: zynqmp: Restore alarm functionality after kexec transition rtc: amlogic-a4: Optimize global variables rtc: sd2405al: Add I2C address. rtc: Kconfig: move symbols to proper section rtc: optee: make optee_rtc_pm_ops static rtc: optee: Fix error code in optee_rtc_read_alarm() rtc: optee: fix error code in probe() dt-bindings: rtc: Convert apm,xgene-rtc to DT schema rtc: spacemit: support the SpacemiT P1 RTC rtc: optee: add alarm related rtc ops to optee rtc driver rtc: optee: remove unnecessary memory operations rtc: optee: fix memory leak on driver removal rtc: x1205: Fix Xicor X1205 vendor prefix dt-bindings: rtc: Fix Xicor X1205 vendor prefix ...

rtc: Kconfig: move symbols to proper section

2025-10-05T20:44:51+00:00

There is only one HID RTC, the following symbols are for on-SoC RTCs Link: https://lore.kernel.org/r/20251005203048.3759240-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni

rtc: spacemit: support the SpacemiT P1 RTC

2025-09-16T15:38:21+00:00

Add support for the RTC found in the SpacemiT P1 PMIC. Initially only setting and reading the time are supported. The PMIC is implemented as a multi-function device. This RTC is probed based on this driver being named in a MFD cell in the simple MFD I2C driver. Signed-off-by: Alex Elder Acked-by: Alexandre Belloni Link: https://lore.kernel.org/r/20250825172057.163883-5-elder@riscstar.com Signed-off-by: Alexandre Belloni

rtc: Add Nuvoton NCT6694 RTC support

2025-09-16T13:41:58+00:00

This driver supports RTC functionality for NCT6694 MFD device based on USB interface. Acked-by: Alexandre Belloni Signed-off-by: Ming Yu Link: https://lore.kernel.org/r/20250912091952.1169369-8-a0282524688@gmail.com Signed-off-by: Lee Jones