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2022-08-08rtc: rtc-cmos: Do not check ACPI_FADT_LOW_POWER_S0Rafael J. Wysocki1-3/+0
The ACPI_FADT_LOW_POWER_S0 flag merely means that it is better to use low-power S0 idle on the given platform than S3 (provided that the latter is supported) and it doesn't preclude using either of them (which of them will be used depends on the choices made by user space). For this reason, there is no benefit from checking that flag in use_acpi_alarm_quirks(). First off, it cannot be a bug to do S3 with use_acpi_alarm set, because S3 can be used on systems with ACPI_FADT_LOW_POWER_S0 and it must work if really supported, so the ACPI_FADT_LOW_POWER_S0 check is not needed to protect the S3-capable systems from failing. Second, suspend-to-idle can be carried out on a system with ACPI_FADT_LOW_POWER_S0 unset and it is expected to work, so if setting use_acpi_alarm is needed to handle that case correctly, it should be set regardless of the ACPI_FADT_LOW_POWER_S0 value. Accordingly, drop the ACPI_FADT_LOW_POWER_S0 check from use_acpi_alarm_quirks(). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/12054246.O9o76ZdvQC@kreacher
2022-08-08rtc: zynqmp: initialize fract_tickAlexandre Belloni1-1/+1
fract_tick is used uninitialized when fract_offset is 0 Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Michal Simek <michal.simek@amd.com> Link: https://lore.kernel.org/r/20220727100018.3301470-1-alexandre.belloni@bootlin.com
2022-07-26rtc: Add NCT3018Y real time clock driverMia Lin4-0/+565
Add real time clock support for NCT3018Y. Signed-off-by: Mia Lin <mimi05633@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220713090647.8028-4-mimi05633@gmail.com
2022-07-26dt-bindings: rtc: nuvoton: add NCT3018Y Real Time ClockMia Lin2-0/+46
Document devicetree bindings for the Nuvoton NCT3018Y Real Time Clock. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Mia Lin <mimi05633@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220713090647.8028-2-mimi05633@gmail.com
2022-07-26dt-bindings: rtc: nxp,pcf85063: Convert to DT schemaAlexander Stein2-32/+92
Convert the NXP PCF85063 RTC binding to DT schema format. Add 'interrupts' and 'wakeup-source' as this device has an interrupt which was not documented, but is in use. 'clock-output-names' and '#clock-cells' are added as well, those were probably missed when adding clkout support in commit 8c229ab6048b ("rtc: pcf85063: Add pcf85063 clkout control to common clock framework") Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220725071919.25342-1-alexander.stein@ew.tq-group.com
2022-07-26dt-bindings: rtc: microcrystal,rv3032: Add missing type to 'trickle-voltage-millivolt'Rob Herring1-0/+1
'trickle-voltage-millivolt' is missing a type definition. '-millivolt' is not a standard unit (should be '-microvolt'). As the property is already in use, add a type reference. Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220719215143.1877566-1-robh@kernel.org
2022-07-26rtc: rx8025: fix 12/24 hour mode detection on RX-8035Mathew McBride1-4/+18
The 12/24hr flag in the RX-8035 can be found in the hour register, instead of the CTRL1 on the RX-8025. This was overlooked when support for the RX-8035 was added, and was causing read errors when the hour register 'overflowed'. To deal with the relevant register not always being visible in the relevant functions, determine the 12/24 mode at startup and store it in the driver state. Signed-off-by: Mathew McBride <matt@traverse.com.au> Fixes: f120e2e33ac8 ("rtc: rx8025: implement RX-8035 support") Cc: stable@vger.kernel.org Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220706074236.24011-1-matt@traverse.com.au
2022-07-26rtc: cros-ec: Only warn once in .remove() about notifier_chain problemsUwe Kleine-König1-3/+1
When a remove platform device callback returns an error code, the driver core emits an error message ("remove callback returned a non-zero value. This will be ignored.\n") and still removes the device. As the driver already emits a more specific error message, return 0 to suppress the core's error message. This is a preparation for making platform remove callbacks return void. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Tzung-Bi Shih <tzungbi@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220707153156.214841-1-u.kleine-koenig@pengutronix.de
2022-07-26rtc: vr41xx: remove driverThomas Bogendoerfer3-374/+0
Commit d3164e2f3b0a ("MIPS: Remove VR41xx support") removed support for MIPS VR41xx platform, so remove exclusive drivers for this platform, too. Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220715135330.134684-1-tsbogend@alpha.franken.de
2022-07-26rtc: mpfs: remove 'pending' variable from mpfs_rtc_wakeup_irq_handler()Tom Rix1-3/+0
cppcheck reports [drivers/rtc/rtc-mpfs.c:219]: (style) Variable 'pending' is assigned a value that is never used. The fetched CONTROL_REG stored in pending is unused and partially duplicates the functionality of the later call to mpfs_rtc_clear(). This looks like leftover development code, so remove pending. Fixes: 0b31d703598d ("rtc: Add driver for Microchip PolarFire SoC") Signed-off-by: Tom Rix <trix@redhat.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220627205943.2075043-1-trix@redhat.com
2022-07-26rtc: rv8803: fix missing unlock on error in rv8803_set_time()Yang Yingliang1-1/+3
Add the missing unlock before return from function rv8803_set_time() in the error handling case. Fixes: f8176e0bb83f ("rtc: rv8803: initialize registers on post-probe voltage loss") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220627080822.3881072-1-yangyingliang@huawei.com
2022-07-26rtc: zynqmp: Add calibration set and get supportSrinivas Neeli1-19/+94
Zynqmp RTC controller has a calibration feature to compensate time deviation due to input clock inaccuracy. Set and get calibration API's are used for setting and getting calibration value from the controller calibration register. Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220626070817.3780977-3-srinivas.neeli@xilinx.com
2022-07-26rtc: zynqmp: Updated calibration valueSrinivas Neeli1-1/+1
As per RTC spec default calibration value is 0x7FFF. We are in process to update the 0x7FFF as default value in the next version of TRM. Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com> Acked-by: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220626070817.3780977-2-srinivas.neeli@xilinx.com
2022-07-26dt-bindings: rtc: zynqmp: Add clock informationSrinivas Neeli1-1/+11
Added clock information and deprecated calibration support. Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220626070817.3780977-1-srinivas.neeli@xilinx.com
2022-07-26rtc: sun6i: add support for R329 RTCIcenowy Zheng1-0/+2
Allwinner R329 has a RTC with a similar time storage with H616 but a slightly different clock part. As we have already handled the R329 RTC clocks in the CCU driver, add a compatible string to RTC driver to allow probing of the RTC. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Samuel Holland <samuel@sholland.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220626042756.58961-1-samuel@sholland.org
2022-06-24rtc: Directly use ida_alloc()/free()keliu1-3/+3
Use ida_alloc()/ida_free() instead of deprecated ida_simple_get()/ida_simple_remove() . Signed-off-by: keliu <liuke94@huawei.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220527073636.2474546-1-liuke94@huawei.com
2022-06-24rtc: Introduce ti-k3-rtcNishanth Menon3-0/+692
Introduce support for Texas Instruments Real Time Clock controller on newer K3 family of SoCs such as AM62x. The hardware module that is being supported is the "digital only" version which doesn't have capability of external wakeup sources and external power backup. However, for many practical applications, this should suffice as RTC is operational across low power sequences. The hardware block by itself is split into two distinct domains internally to further reduce the power consumption with the actual counter block and comparators clocked off a 32k clock source (which based on SoC integration can be sourced by an external crystal) and an register interface block which is driven by the bus clock. While optimal from power perspective, it does create some complicated synchronizations and sequences that one must be wary of in the driver handling. Acked-by: Andrew Davis <afd@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com> Tested-by: Georgi Vlaev <g-vlaev@ti.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220623170808.20998-3-nm@ti.com