linux-toradex.git/drivers/rtc, branch v6.19 Linux kernel for Apalis and Colibri modules Merge tag 'rtc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux 2025-12-13T05:09:06+00:00 Linus Torvalds torvalds@linux-foundation.org 2025-12-13T05:09:06+00:00 d324e9a91502184e0ac201293a6ec0fbe10458ed Pull RTC updates from Alexandre Belloni: "Subsystem: - stop setting max_user_freq from the individual drivers as this has not been hardware related for a while New drivers: - Andes ATCRTC100 - Apple SMC - Nvidia VRS Drivers: - renesas-rtca3: add RZ/V2H support - tegra: add ACPI support" * tag 'rtc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (34 commits) rtc: spacemit: MFD_SPACEMIT_P1 as dependencies rtc: atcrtc100: Fix signedness bug in probe() rtc: max31335: Fix ignored return value in set_alarm rtc: gamecube: Check the return value of ioremap() Documentation: ABI: testing: Fix "upto" typo in rtc-cdev rtc: Add new rtc-macsmc driver for Apple Silicon Macs dt-bindings: rtc: Add Apple SMC RTC MAINTAINERS: drop unneeded file entry in NVIDIA VRS RTC DRIVER rtc: isl12026: Add id_table rtc: renesas-rtca3: Add support for multiple reset lines dt-bindings: rtc: renesas,rz-rtca3: Add RZ/V2H support rtc: tegra: Replace deprecated SIMPLE_DEV_PM_OPS rtc: tegra: Add ACPI support rtc: tegra: Use devm_clk_get_enabled() in probe rtc: Kconfig: add MC34708 to mc13xxx help text rtc: s35390a: use u8 instead of char for register buffer rtc: nvvrs: add NVIDIA VRS RTC device driver dt-bindings: rtc: Document NVIDIA VRS RTC rtc: atcrtc100: Add ATCRTC100 RTC driver MAINTAINERS: Add entry for ATCRTC100 RTC driver ... 
Pull RTC updates from Alexandre Belloni:
 "Subsystem:
   - stop setting max_user_freq from the individual drivers as this has
     not been hardware related for a while

  New drivers:
   - Andes ATCRTC100
   - Apple SMC
   - Nvidia VRS

  Drivers:
   - renesas-rtca3: add RZ/V2H support
   - tegra: add ACPI support"

* tag 'rtc-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (34 commits)
  rtc: spacemit: MFD_SPACEMIT_P1 as dependencies
  rtc: atcrtc100: Fix signedness bug in probe()
  rtc: max31335: Fix ignored return value in set_alarm
  rtc: gamecube: Check the return value of ioremap()
  Documentation: ABI: testing: Fix "upto" typo in rtc-cdev
  rtc: Add new rtc-macsmc driver for Apple Silicon Macs
  dt-bindings: rtc: Add Apple SMC RTC
  MAINTAINERS: drop unneeded file entry in NVIDIA VRS RTC DRIVER
  rtc: isl12026: Add id_table
  rtc: renesas-rtca3: Add support for multiple reset lines
  dt-bindings: rtc: renesas,rz-rtca3: Add RZ/V2H support
  rtc: tegra: Replace deprecated SIMPLE_DEV_PM_OPS
  rtc: tegra: Add ACPI support
  rtc: tegra: Use devm_clk_get_enabled() in probe
  rtc: Kconfig: add MC34708 to mc13xxx help text
  rtc: s35390a: use u8 instead of char for register buffer
  rtc: nvvrs: add NVIDIA VRS RTC device driver
  dt-bindings: rtc: Document NVIDIA VRS RTC
  rtc: atcrtc100: Add ATCRTC100 RTC driver
  MAINTAINERS: Add entry for ATCRTC100 RTC driver
  ...
rtc: spacemit: MFD_SPACEMIT_P1 as dependencies 2025-12-08T22:02:10+00:00 Troy Mitchell troy.mitchell@linux.spacemit.com 2025-11-18T06:08:06+00:00 16bd954c93360145bc77cc601e350913fc28182d 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 <troy.mitchell@linux.spacemit.com> Acked-by: Alex Elder <elder@riscstar.com> Link: https://patch.msgid.link/20251118-p1-kconfig-fix-v3-2-8839c5ac5db3@linux.spacemit.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
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 <troy.mitchell@linux.spacemit.com>
Acked-by: Alex Elder <elder@riscstar.com>
Link: https://patch.msgid.link/20251118-p1-kconfig-fix-v3-2-8839c5ac5db3@linux.spacemit.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: atcrtc100: Fix signedness bug in probe() 2025-12-08T21:59:58+00:00 Dan Carpenter dan.carpenter@linaro.org 2025-11-18T10:48:56+00:00 159a740c768e4e8fe3c63d20055bf54de29c0c02 The "atcrtc_dev->alarm_irq" variable is an unsigned int but it needs to be signed for the error handling to work. Use the "ret" variable instead. Fixes: 7adca706fe16 ("rtc: atcrtc100: Add ATCRTC100 RTC driver") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Link: https://patch.msgid.link/aRxPGBEX8hbY6sjV@stanley.mountain Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
The "atcrtc_dev->alarm_irq" variable is an unsigned int but it needs to
be signed for the error handling to work.  Use the "ret" variable
instead.

Fixes: 7adca706fe16 ("rtc: atcrtc100: Add ATCRTC100 RTC driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://patch.msgid.link/aRxPGBEX8hbY6sjV@stanley.mountain
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: max31335: Fix ignored return value in set_alarm 2025-12-08T21:55:39+00:00 Nuno Sá nuno.sa@analog.com 2025-11-28T16:36:38+00:00 f07640f9fb8df2158199da1da1f8282948385a84 Return the result from regmap_update_bits() instead of ignoring it and always returning 0. Fixes: dedaf03b99d6 ("rtc: max31335: add driver support") Signed-off-by: Nuno Sá <nuno.sa@analog.com> Link: https://patch.msgid.link/20251128-max31335-handler-error-v1-1-6b6f7f78dbda@analog.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
Return the result from regmap_update_bits() instead of ignoring it
and always returning 0.

Fixes: dedaf03b99d6 ("rtc: max31335: add driver support")
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20251128-max31335-handler-error-v1-1-6b6f7f78dbda@analog.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: gamecube: Check the return value of ioremap() 2025-12-08T21:54:17+00:00 Haotian Zhang vulab@iscas.ac.cn 2025-11-26T08:06:25+00:00 d1220e47e4bd2be8b84bc158f4dea44f2f88b226 The function ioremap() in gamecube_rtc_read_offset_from_sram() can fail and return NULL, which is dereferenced without checking, leading to a NULL pointer dereference. Add a check for the return value of ioremap() and return -ENOMEM on failure. Fixes: 86559400b3ef ("rtc: gamecube: Add a RTC driver for the GameCube, Wii and Wii U") Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn> Reviewed-by: Link Mauve <kernel@linkmauve.fr> Link: https://patch.msgid.link/20251126080625.1752-1-vulab@iscas.ac.cn Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
The function ioremap() in gamecube_rtc_read_offset_from_sram() can fail
and return NULL, which is dereferenced without checking, leading to a
NULL pointer dereference.

Add a check for the return value of ioremap() and return -ENOMEM on
failure.

Fixes: 86559400b3ef ("rtc: gamecube: Add a RTC driver for the GameCube, Wii and Wii U")
Signed-off-by: Haotian Zhang <vulab@iscas.ac.cn>
Reviewed-by: Link Mauve <kernel@linkmauve.fr>
Link: https://patch.msgid.link/20251126080625.1752-1-vulab@iscas.ac.cn
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: Add new rtc-macsmc driver for Apple Silicon Macs 2025-12-08T21:41:59+00:00 Hector Martin marcan@marcan.st 2025-11-12T11:16:49+00:00 49a51df427dbb5bab9b3341a3a59c248bab79d50 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 <neal@gompa.dev> Signed-off-by: Hector Martin <marcan@marcan.st> Signed-off-by: Sven Peter <sven@kernel.org> Signed-off-by: James Calligeros <jcalligeros99@gmail.com> Link: https://patch.msgid.link/20251112-macsmc-subdevs-v5-3-728e4b91fe81@gmail.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
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 <neal@gompa.dev>
Signed-off-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Sven Peter <sven@kernel.org>
Signed-off-by: James Calligeros <jcalligeros99@gmail.com>
Link: https://patch.msgid.link/20251112-macsmc-subdevs-v5-3-728e4b91fe81@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: isl12026: Add id_table 2025-12-08T21:31:12+00:00 Akhilesh Patil akhilesh@ee.iitb.ac.in 2025-11-09T05:48:59+00:00 e0784949c65b1d961d101325b11e43eb306ad04b Add i2c id_table for isl12026 rtc. Signed-off-by: Akhilesh Patil <akhilesh@ee.iitb.ac.in> Link: https://patch.msgid.link/2025119-54859-2010914@bhairav-test.ee.iitb.ac.in Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
Add i2c id_table for isl12026 rtc.

Signed-off-by: Akhilesh Patil <akhilesh@ee.iitb.ac.in>
Link: https://patch.msgid.link/2025119-54859-2010914@bhairav-test.ee.iitb.ac.in
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: renesas-rtca3: Add support for multiple reset lines 2025-12-08T21:28:17+00:00 Ovidiu Panait ovidiu.panait.rb@renesas.com 2025-11-07T21:07:04+00:00 6ada8e24238dd57b38faca503b09757e17819b05 Switch from devm_reset_control_get_shared() to devm_reset_control_array_get_shared() when retrieving resets. The RZ/V2H SoC requires two resets for the RTC block instead of one, so this will allow to handle multiple resets without additional changes. Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com> Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> Link: https://patch.msgid.link/20251107210706.45044-3-ovidiu.panait.rb@renesas.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
Switch from devm_reset_control_get_shared() to
devm_reset_control_array_get_shared() when retrieving resets.

The RZ/V2H SoC requires two resets for the RTC block instead of one,
so this will allow to handle multiple resets without additional changes.

Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20251107210706.45044-3-ovidiu.panait.rb@renesas.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: tegra: Replace deprecated SIMPLE_DEV_PM_OPS 2025-12-08T21:26:42+00:00 Kartik Rajput kkartik@nvidia.com 2025-10-24T06:49:52+00:00 bf5ef3ce42da98c59d820dfdd9513ff210622f32 Replace deprecated SIMPLE_DEV_PM_OPS with DEFINE_SIMPLE_DEV_PM_OPS macro and use pm_sleep_ptr() to initialize pm_ops. This also allows us to drop the checks for CONFIG_PM_SLEEP. Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Kartik Rajput <kkartik@nvidia.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Link: https://patch.msgid.link/20251024064952.775883-3-kkartik@nvidia.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
Replace deprecated SIMPLE_DEV_PM_OPS with DEFINE_SIMPLE_DEV_PM_OPS macro
and use pm_sleep_ptr() to initialize pm_ops. This also allows us to drop
the checks for CONFIG_PM_SLEEP.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Kartik Rajput <kkartik@nvidia.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://patch.msgid.link/20251024064952.775883-3-kkartik@nvidia.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
rtc: tegra: Add ACPI support 2025-12-08T21:26:42+00:00 Kartik Rajput kkartik@nvidia.com 2025-10-24T06:49:51+00:00 0a293451030b4ad69026b77c7d6b6bdf5cafd7e4 Add ACPI support for Tegra RTC, which is available on Tegra241 and Tegra410. Both Tegra241 and Tegra410 use the same ACPI ID 'NVDA0280'. When ACPI boot is used, the RTC clock is configured by UEFI before the kernel boots. On device-tree boot, the probe must fail if clocks are not provided in the device-tree. Signed-off-by: Kartik Rajput <kkartik@nvidia.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Link: https://patch.msgid.link/20251024064952.775883-2-kkartik@nvidia.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 
Add ACPI support for Tegra RTC, which is available on Tegra241 and
Tegra410. Both Tegra241 and Tegra410 use the same ACPI ID 'NVDA0280'.
When ACPI boot is used, the RTC clock is configured by UEFI before
the kernel boots. On device-tree boot, the probe must fail if clocks are
not provided in the device-tree.

Signed-off-by: Kartik Rajput <kkartik@nvidia.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Link: https://patch.msgid.link/20251024064952.775883-2-kkartik@nvidia.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>