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2022-05-17Revert "clk: sunxi-ng: sun6i-rtc: Add support for H6"Jernej Skrabec1-0/+17
This reverts commit 1738890a3165ccd0da98ebd3e2d5f9b230d5afa8. Commit 1738890a3165 ("clk: sunxi-ng: sun6i-rtc: Add support for H6") breaks HDMI output on Tanix TX6 mini board. Exact reason isn't known, but because that commit doesn't actually improve anything, let's just revert it. Cc: stable@vger.kernel.org Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com> Link: https://lore.kernel.org/r/20220511200206.2458274-1-jernej.skrabec@gmail.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2022-04-01Merge tag 'rtc-5.18' of ↵Linus Torvalds25-202/+617
git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux Pull RTC updates from Alexandre Belloni: "The bulk of the patches are about replacing the uie_unsupported struct rtc_device member by a feature bit. Subsystem: - remove uie_unsupported, all users have been converted to clear RTC_FEATURE_UPDATE_INTERRUPT and provide a reason - RTCs with an alarm with a resolution of a minute are now letting the core handle rounding down the alarm time - fix use-after-free on device removal New driver: - OP-TEE RTC PTA Drivers: - sun6i: Add H616 support - cmos: Fix the AltCentury for AMD platforms - spear: set range" * tag 'rtc-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (56 commits) rtc: check if __rtc_read_time was successful rtc: gamecube: Fix refcount leak in gamecube_rtc_read_offset_from_sram rtc: mc146818-lib: Fix the AltCentury for AMD platforms rtc: optee: add RTC driver for OP-TEE RTC PTA rtc: pm8xxx: Return -ENODEV if set_time disallowed rtc: pm8xxx: Attach wake irq to device clk: sunxi-ng: sun6i-rtc: include clk/sunxi-ng.h rtc: remove uie_unsupported rtc: xgene: stop using uie_unsupported rtc: hym8563: switch to RTC_FEATURE_UPDATE_INTERRUPT rtc: hym8563: let the core handle the alarm resolution rtc: hym8563: switch to devm_rtc_allocate_device rtc: efi: switch to RTC_FEATURE_UPDATE_INTERRUPT rtc: efi: switch to devm_rtc_allocate_device rtc: add new RTC_FEATURE_ALARM_WAKEUP_ONLY feature rtc: spear: fix spear_rtc_read_time rtc: spear: drop uie_unsupported rtc: spear: set range rtc: spear: switch to devm_rtc_allocate_device rtc: pcf8563: switch to RTC_FEATURE_UPDATE_INTERRUPT ...
2022-03-29rtc: check if __rtc_read_time was successfulTom Rix1-2/+5
Clang static analysis reports this issue interface.c:810:8: warning: Passed-by-value struct argument contains uninitialized data now = rtc_tm_to_ktime(tm); ^~~~~~~~~~~~~~~~~~~ tm is set by a successful call to __rtc_read_time() but its return status is not checked. Check if it was successful before setting the enabled flag. Move the decl of err to function scope. Fixes: 2b2f5ff00f63 ("rtc: interface: ignore expired timers when enqueuing new timers") Signed-off-by: Tom Rix <trix@redhat.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220326194236.2916310-1-trix@redhat.com
2022-03-29rtc: gamecube: Fix refcount leak in gamecube_rtc_read_offset_from_sramMiaoqian Lin1-0/+1
The of_find_compatible_node() function returns a node pointer with refcount incremented, We should use of_node_put() on it when done Add the missing of_node_put() to release the refcount. Fixes: 86559400b3ef ("rtc: gamecube: Add a RTC driver for the GameCube, Wii and Wii U") Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309092225.6930-1-linmq006@gmail.com
2022-03-29rtc: mc146818-lib: Fix the AltCentury for AMD platformsMario Limonciello1-1/+15
Setting the century forward has been failing on AMD platforms. There was a previous attempt at fixing this for family 0x17 as part of commit 7ad295d5196a ("rtc: Fix the AltCentury value on AMD/Hygon platform") but this was later reverted due to some problems reported that appeared to stem from an FW bug on a family 0x17 desktop system. The same comments mentioned in the previous commit continue to apply to the newer platforms as well. ``` MC146818 driver use function mc146818_set_time() to set register RTC_FREQ_SELECT(RTC_REG_A)'s bit4-bit6 field which means divider stage reset value on Intel platform to 0x7. While AMD/Hygon RTC_REG_A(0Ah)'s bit4 is defined as DV0 [Reference]: DV0 = 0 selects Bank 0, DV0 = 1 selects Bank 1. Bit5-bit6 is defined as reserved. DV0 is set to 1, it will select Bank 1, which will disable AltCentury register(0x32) access. As UEFI pass acpi_gbl_FADT.century 0x32 (AltCentury), the CMOS write will be failed on code: CMOS_WRITE(century, acpi_gbl_FADT.century). Correct RTC_REG_A bank select bit(DV0) to 0 on AMD/Hygon CPUs, it will enable AltCentury(0x32) register writing and finally setup century as expected. ``` However in closer examination the change previously submitted was also modifying bits 5 & 6 which are declared reserved in the AMD documentation. So instead modify just the DV0 bank selection bit. Being cognizant that there was a failure reported before, split the code change out to a static function that can also be used for exclusions if any regressions such as Mikhail's pop up again. Cc: Jinke Fan <fanjinke@hygon.cn> Cc: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com> Link: https://lore.kernel.org/all/CABXGCsMLob0DC25JS8wwAYydnDoHBSoMh2_YLPfqm3TTvDE-Zw@mail.gmail.com/ Link: https://www.amd.com/system/files/TechDocs/51192_Bolton_FCH_RRG.pdf Signed-off-by: Raul E Rangel <rrangel@chromium.org> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220111225750.1699-1-mario.limonciello@amd.com
2022-03-25Merge tag 'mfd-next-5.18' of ↵Linus Torvalds2-31/+46
git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull MFD updates from Lee Jones: "New Drivers: - Add support for Maxim MAX77714 PMIC Removed Drivers: - Remove support for ST-Ericsson AB8500 DebugFS New Device Support: - Add support for Silergy SY7636A to Simple MFD I2C - Add support for MediaTek MT6366 PMIC to MT6358 IRQ - Add support for Charger to Intel PMIC CRC - Add support for Raptor Lake to Intel LPSS PCI New Functionality: - Add support for Reboot to Rockchip RK808 Fix-ups: - Device Tree changes (includcing YAML conversion) for silergy,sy7636a, maxim,max77843, google,cros-ec, maxim,max14577, maxim,max77802, maxim,max77714, qcom,tcsr, qcom,spmi-pmic, stericsson,ab8500, stericsson,db8500-prcmu, samsung,exynos5433-lpass, mt6397, syscon, brcm,cru - Visible to menuconfig; simple-mfd-i2c - Clean-up or clarify code; max77686, intel_soc_pmic_crc - Improve error handling; mc13xxx-core, stmfx, asic3 - Pass device information to child devices; iqs62x, intel-lpss-acpi - Individually identify IRQ domains; intel_soc_pmic_core - Remove superfluous code; dbx500-prcmu, exynos-lpass - Staticify and constify; arizona-i2c - Mark sometimes used data as __maybe_unused; atmel-flexcom - Account for different ACPI tables on AOSP/Windows platforms; arizona-spi - Use provided (platform) APIs; ab8500-core - Trivial (whitespace, spelling); rohm-bd9576" * tag 'mfd-next-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (50 commits) dt-bindings: mfd: syscon: Add microchip,lan966x-cpu-syscon compatible mfd: bd9576: fix typos in comments mfd: Use platform_get_irq() to get the interrupt mfd: db8500-prcmu: Remove unused inline function mfd: arizona-spi: Add Android board ACPI table handling mfd: arizona-spi: Split Windows ACPI init code into its own function mfd: asic3: Add missing iounmap() on error asic3_mfd_probe MAINTAINERS: Rectify entry for ROHM MULTIFUNCTION BD9571MWV-M PMIC DEVICE DRIVERS mfd: intel-lpss: Provide an SSP type to the driver dt-bindings: mfd: brcm,cru: Rename pinctrl node dt-bindings: Add compatibles for undocumented trivial syscons mfd: atmel-flexcom: Fix compilation warning dt-bindings: mfd: Add compatible for the MediaTek MT6366 PMIC dt-bindings: mfd: samsung,exynos5433-lpass: Convert to dtschema mfd: exynos-lpass: Drop unneeded syscon.h include mfd: intel-lpss: Add Intel Raptor Lake PCH-S PCI IDs mfd: ab8500: Drop debugfs module mfd: sta2x11: Use GFP_KERNEL instead of GFP_ATOMIC mfd: ab8500: Rewrite bindings in YAML mfd: qcom-spmi-pmic: Add pm8953 compatible ...
2022-03-25rtc: optee: add RTC driver for OP-TEE RTC PTAClément Léger3-0/+373
This drivers allows to communicate with a RTC PTA handled by OP-TEE [1]. This PTA allows to query RTC information, set/get time and set/get offset depending on the supported features. [1] https://github.com/OP-TEE/optee_os/pull/5179 Signed-off-by: Clément Léger <clement.leger@bootlin.com> Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220308133505.471601-1-clement.leger@bootlin.com
2022-03-25rtc: pm8xxx: Return -ENODEV if set_time disallowedLoic Poulain1-1/+1
Having !allow_set_time is equivalent to non-implemented set_time function, which is normally represented with -ENODEV error in RTC subsystem. Today we are returning -EACCES error code, which is not considered by RTC clients as a 'non implemented' feature, and which causes NTP to retry hw clk sync (update_rtc) indefinitely. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1645090578-20734-1-git-send-email-loic.poulain@linaro.org
2022-03-25rtc: pm8xxx: Attach wake irq to deviceLoic Poulain1-21/+10
Attach the interrupt as a wake-irq to the device, so that: - A corresponding wakeup source is created (and reported in e.g /sys/kernel/debug/wakeup_sources). - The power subsystem take cares of arming/disarming irq-wake automatically on suspend/resume. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/1645025082-6138-1-git-send-email-loic.poulain@linaro.org
2022-03-23rtc: remove uie_unsupportedAlexandre Belloni1-3/+0
uie_unsupported is not used by any drivers anymore, remove it. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-29-alexandre.belloni@bootlin.com
2022-03-23rtc: xgene: stop using uie_unsupportedAlexandre Belloni1-2/+0
Remove bogus use of uie_unsupported. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-28-alexandre.belloni@bootlin.com
2022-03-23rtc: hym8563: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-2/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-27-alexandre.belloni@bootlin.com
2022-03-23rtc: hym8563: let the core handle the alarm resolutionAlexandre Belloni1-18/+1
Set RTC_FEATURE_ALARM_RES_MINUTE, so the core knows alarms have a resolution of a minute. Also, the core will properly round down the alarm instead of up. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-26-alexandre.belloni@bootlin.com
2022-03-23rtc: hym8563: switch to devm_rtc_allocate_deviceAlexandre Belloni1-6/+6
Switch to devm_rtc_allocate_device/devm_rtc_register_device, this allows for further improvement of the driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-25-alexandre.belloni@bootlin.com
2022-03-23rtc: efi: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+2
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Also the driver doesn't supports UIE because it doesn't handle interrupts so set RTC_FEATURE_ALARM_WAKEUP_ONLY,. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-24-alexandre.belloni@bootlin.com
2022-03-23rtc: efi: switch to devm_rtc_allocate_deviceAlexandre Belloni1-4/+5
Switch to devm_rtc_allocate_device/devm_rtc_register_device, this allows for further improvement of the driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-23-alexandre.belloni@bootlin.com
2022-03-23rtc: spear: fix spear_rtc_read_timeAlexandre Belloni1-2/+4
The reference manual doesn't specify whether the registers are latched and they probably aren't, ensure the read time and date are consistent. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20220309162301.61679-21-alexandre.belloni@bootlin.com
2022-03-23rtc: spear: drop uie_unsupportedAlexandre Belloni1-1/+0
Since commitc9f5c7e7a84f ("rtc: rtc-spear: Provide flag for no support of UIE mode") which was in 2012, the core changed a lot and UIE are now supported using regular alarms. Drop uie_unsupported now to reflect that. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20220309162301.61679-20-alexandre.belloni@bootlin.com
2022-03-23rtc: spear: set rangeAlexandre Belloni1-0/+2
While the RTC can store dates from year 0000 to 9999, leap years where not tested fro 2100. The driver currently stores tm_year directly which will probably fail at that time or more probably in 2300. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20220309162301.61679-19-alexandre.belloni@bootlin.com
2022-03-23rtc: spear: switch to devm_rtc_allocate_deviceAlexandre Belloni1-9/+9
Switch to devm_rtc_allocate_device/devm_rtc_register_device, this allows for further improvement of the driver. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Link: https://lore.kernel.org/r/20220309162301.61679-18-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf8563: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-17-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf8563: let the core handle the alarm resolutionAlexandre Belloni1-13/+1
Set RTC_FEATURE_ALARM_RES_MINUTE, so the core knows alarms have a resolution of a minute. Also, the core will properly round down the alarm instead of up. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-16-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf8523: let the core handle the alarm resolutionAlexandre Belloni1-8/+1
Set RTC_FEATURE_ALARM_RES_MINUTE, so the core knows alarms have a resolution of a minute. Also, the core will properly round down the alarm instead of up. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-15-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf8523: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-14-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf85063: set RTC_FEATURE_ALARM_RES_2SAlexandre Belloni1-0/+1
The PCF85063 doesn't support UIE because setting an alarm to fire every second confuses the chip and the fastest we can go is an alarm every 2 seconds. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-13-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf85063: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-12-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf2127: set RTC_FEATURE_ALARM_RES_2SAlexandre Belloni1-0/+1
The PCF2127 doesn't support UIE because setting an alarm to fire every second confuses the chip and the fastest we can go is an alarm every 2 seconds. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-11-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf2127: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-10-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf2123: set RTC_FEATURE_ALARM_RES_MINUTEAlexandre Belloni1-0/+1
Alarms have a resolution of a minute. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-9-alexandre.belloni@bootlin.com
2022-03-23rtc: pcf2123: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-8-alexandre.belloni@bootlin.com
2022-03-23rtc: opal: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-7-alexandre.belloni@bootlin.com
2022-03-23rtc: m41t80: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-4/+2
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-6-alexandre.belloni@bootlin.com
2022-03-23rtc: mpc5121: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-5-alexandre.belloni@bootlin.com
2022-03-23rtc: mpc5121: let the core handle the alarm resolutionAlexandre Belloni1-14/+1
Set RTC_FEATURE_ALARM_RES_MINUTE, so the core knows alarms have a resolution of a minute. Also, the core will properly round down the alarm instead of up. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-4-alexandre.belloni@bootlin.com
2022-03-23rtc: ds1307: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-3-alexandre.belloni@bootlin.com
2022-03-23rtc: ds1685: drop no_irqAlexandre Belloni1-9/+5
No platforms are currently setting no_irq. Anyway, letting platform_get_irq fail is fine as this means that there is no IRQ. In that case, clear RTC_FEATURE_ALARM so the core knows there are no alarms. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-2-alexandre.belloni@bootlin.com
2022-03-23rtc: ds1685: switch to RTC_FEATURE_UPDATE_INTERRUPTAlexandre Belloni1-1/+1
Stop using uie_unsupported and clear RTC_FEATURE_UPDATE_INTERRUPT instead. There is currently a missing information as to why this is not supported on ioc3. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-1-alexandre.belloni@bootlin.com
2022-03-23clk: sunxi-ng: sun6i-rtc: Add support for H6Samuel Holland1-17/+0
H6 supports IOSC calibration and an ext-osc32k input. Unlike newer SoCs, it has a single parent for its fanout clock. Add support for H6 in the CCU driver, replacing the support in the existing early OF clock provider. Signed-off-by: Samuel Holland <samuel@sholland.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220203021736.13434-7-samuel@sholland.org
2022-03-23clk: sunxi-ng: Add support for the sun6i RTC clocksSamuel Holland1-0/+7
The RTC power domain in sun6i and newer SoCs manages the 16 MHz RC oscillator (called "IOSC" or "osc16M") and the optional 32 kHz crystal oscillator (called "LOSC" or "osc32k"). Starting with the H6, this power domain also handles the 24 MHz DCXO (called variously "HOSC", "dcxo24M", or "osc24M") as well. The H6 also adds a calibration circuit for IOSC. Later SoCs introduce further variations on the design: - H616 adds an additional mux for the 32 kHz fanout source. - R329 adds an additional mux for the RTC timekeeping clock, a clock for the SPI bus between power domains inside the RTC, and removes the IOSC calibration functionality. Take advantage of the CCU framework to handle this increased complexity. This driver is intended to be a drop-in replacement for the existing RTC clock provider. So some runtime adjustment of the clock parents is needed, both to handle hardware differences, and to support the old binding which omitted some of the input clocks. Signed-off-by: Samuel Holland <samuel@sholland.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220203021736.13434-6-samuel@sholland.org
2022-03-23rtc: wm8350: Handle error for wm8350_register_irqJiasheng Jiang1-2/+9
As the potential failure of the wm8350_register_irq(), it should be better to check it and return error if fails. Also, it need not free 'wm_rtc->rtc' since it will be freed automatically. Fixes: 077eaf5b40ec ("rtc: rtc-wm8350: add support for WM8350 RTC") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220303085030.291793-1-jiasheng@iscas.ac.cn
2022-03-23rtc: sun6i: Add Allwinner H616 supportAndre Przywara1-0/+2
The H616 RTC changes its day storage to the newly introduced linear day scheme, so pair the new compatible string with this feature flag. The RTC clock parts are handled in a separate driver now, so we skip the clock parts in this driver completely. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220211122643.1343315-7-andre.przywara@arm.com
2022-03-23rtc: sun6i: Add support for broken-down alarm registersAndre Przywara1-17/+40
Newer versions of the Allwinner RTC, for instance as found in the H616 SoC, not only store the current day as a linear number, but also change the way the alarm is handled: There are now two registers, that explicitly store the wakeup time, in the same format as the current time. Add support for that variant by writing the requested wakeup time directly into the registers, instead of programming the seconds left, as the old SoCs required. Reviewed by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220211122643.1343315-6-andre.przywara@arm.com
2022-03-23rtc: sun6i: Add support for linear day storageAndre Przywara1-23/+46
Newer versions of the Allwinner RTC, as for instance found in the H616 SoC, no longer store a broken-down day/month/year representation in the RTC_DAY_REG, but just a linear day number. The user manual does not give any indication about the expected epoch time of this day count, but the BSP kernel uses the UNIX epoch, which allows easy support due to existing conversion functions in the kernel. Allow tagging a compatible string with a flag, and use that to mark those new RTCs. Then convert between a UNIX day number (converted into seconds) and the broken-down day representation using mktime64() and time64_to_tm() in the set_time/get_time functions. That enables support for the RTC in those new chips. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220211122643.1343315-5-andre.przywara@arm.com
2022-03-23rtc: sun6i: Fix time overflow handlingAndre Przywara1-9/+5
Using "unsigned long" for UNIX timestamps is never a good idea, and comparing the value of such a variable against U32_MAX does not do anything useful on 32-bit systems. Use the proper time64_t type when dealing with timestamps, and avoid cutting down the time range unnecessarily. This also fixes the flawed check for the alarm time being too far into the future. The check for this condition is actually somewhat theoretical, as the RTC counts till 2033 only anyways, and 2^32 seconds from now is not before the year 2157 - at which point I hope nobody will be using this hardware anymore. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220211122643.1343315-4-andre.przywara@arm.com
2022-03-23rtc: pl031: fix rtc features null pointer dereferenceAli Pouladi1-3/+3
When there is no interrupt line, rtc alarm feature is disabled. The clearing of the alarm feature bit was being done prior to allocations of ldata->rtc device, resulting in a null pointer dereference. Clear RTC_FEATURE_ALARM after the rtc device is allocated. Fixes: d9b0dd54a194 ("rtc: pl031: use RTC_FEATURE_ALARM") Cc: stable@vger.kernel.org Signed-off-by: Ali Pouladi <quic_apouladi@quicinc.com> Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220225161924.274141-1-quic_eberman@quicinc.com
2022-03-23rtc: mc146818-lib: fix locking in mc146818_set_timeMateusz Jończyk1-2/+4
In mc146818_set_time(), CMOS_READ(RTC_CONTROL) was performed without the rtc_lock taken, which is required for CMOS accesses. Fix this. Nothing in kernel modifies RTC_DM_BINARY, so a separate critical section is allowed here. Fixes: dcf257e92622 ("rtc: mc146818: Reduce spinlock section in mc146818_set_time()") Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220220090403.153928-1-mat.jonczyk@o2.pl
2022-03-07rtc: max77686: Add MAX77714 supportLuca Ceresoli2-1/+25
The RTC included in the MAX77714 PMIC is very similar to the one in the MAX77686. Reuse the rtc-max77686.c driver with the minimum required changes for the MAX77714 RTC. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2022-03-07rtc: max77686: Remove unused code to read in 12-hour modeLuca Ceresoli1-13/+1
The MAX77714 RTC chip is explicitly set to 24-hour mode in max77686_rtc_probe() -> max77686_rtc_init_reg() and never changed back to 12-hour mode. Accordingly info->rtc_24hr_mode is set to 1 in the same place and never modified later, so it is de facto a constant. Yet there is code to read 12-hour time, which is unreachable. Remove the unused variable, the unreachable code to manage 12-hour mode and the defines that become unused due to the above changes. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2022-03-07rtc: max77686: Rename day-of-month definesLuca Ceresoli1-8/+8
RTC_DATE and REG_RTC_DATE are used for the registers holding the day of month. Rename these constants to mean what they mean. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
2022-03-07rtc: max77686: Convert comments to kernel-doc formatLuca Ceresoli1-9/+12
Convert the comments documenting this struct to kernel-doc format for standardization and readability. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 10:38:36 +0000