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linux-6.14.y
linux/drivers/rtc
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Alexandre Mergnat 57082e0300 rtc: Fix offset calculation for .start_secs < 0 
commit fe9f5f96cf upstream.

The comparison

        rtc->start_secs > rtc->range_max

has a signed left-hand side and an unsigned right-hand side.
So the comparison might become true for negative start_secs which is
interpreted as a (possibly very large) positive value.

As a negative value can never be bigger than an unsigned value
the correct representation of the (mathematical) comparison

        rtc->start_secs > rtc->range_max

in C is:

        rtc->start_secs >= 0 && rtc->start_secs > rtc->range_max

Use that to fix the offset calculation currently used in the
rtc-mt6397 driver.

Fixes: 989515647e ("rtc: Add one offset seconds to expand RTC range")
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/20250428-enable-rtc-v4-2-2b2f7e3f9349@baylibre.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-06-10 07:15:56 -04:00
..
class.c
rtc: Fix offset calculation for .start_secs < 0
2025-06-10 07:15:56 -04:00
dev.c
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
interface.c
rtc: check if __rtc_read_time was successful in rtc_timer_do_work()
2024-11-11 23:10:54 +01:00
Kconfig
rtc: RTC_DRV_SPEAR should not default to y when compile-testing
2025-01-09 18:14:30 +01:00
lib_test.c
rtc: add missing MODULE_DESCRIPTION() macro
2024-06-28 00:24:43 +02:00
lib.c
rtc: Make rtc_time64_to_tm() support dates before 1970
2025-06-10 07:15:56 -04:00
Makefile
rtc: support for the Amlogic on-chip RTC
2024-11-12 15:05:31 +01:00
nvmem.c
nvmem: add explicit config option to read old syntax fixed OF cells
2023-10-21 19:19:06 +02:00
proc.c
rtc: fix snprintf() checking in is_rtc_hctosys()
2021-05-25 00:36:11 +02:00
rtc-88pm80x.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-88pm860x.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-88pm886.c
rtc: add driver for Marvell 88PM886 PMIC RTC
2024-11-11 23:37:50 +01:00
rtc-ab8500.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-ab-b5ze-s3.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-ab-eoz9.c
rtc: ab-eoz9: don't fail temperature reads on undervoltage notification
2024-11-25 23:34:12 +01:00
rtc-abx80x.c
rtc: abx80x: Fix WDT bit position of the status register
2024-11-11 22:10:26 +01:00
rtc-ac100.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-amlogic-a4.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-armada38x.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-as3722.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-asm9260.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-aspeed.c
rtc: remove redundant of_match_ptr()
2023-08-10 09:45:41 +02:00
rtc-at91rm9200.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-at91sam9.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-au1xxx.c
rtc: au1xxx: convert to SPDX identifier
2021-07-10 01:53:39 +02:00
rtc-bd70528.c
mfd: rtc: bd7xxxx Drop IC name from IRQ
2024-11-01 15:53:05 +00:00
rtc-bq32k.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-bq4802.c
…
rtc-brcmstb-waketimer.c
rtc: brcmstb-waketimer: don't include 'pm_wakeup.h' directly
2024-11-18 14:47:40 +01:00
rtc-cadence.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-cmos.c
rtc: Remove hpet_rtc_dropped_irq()
2025-01-13 23:07:18 +01:00
rtc-core.h
rtc: Remove unused rtc_dev_exit().
2022-06-24 21:24:02 +02:00
rtc-cpcap.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-cros-ec.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-da9052.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-da9055.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-da9063.c
rtc: da9063: Use dev_err_probe()
2024-01-18 01:00:21 +01:00
rtc-digicolor.c
rtc: digicolor: quiet maybe-unused variable warning
2021-02-06 00:58:24 +01:00
rtc-ds1216.c
…
rtc-ds1286.c
…
rtc-ds1302.c
rtc: ds1302: remove unnecessary spi_set_drvdata()
2022-11-15 21:01:51 +01:00
rtc-ds1305.c
rtc: ds1305: Report maximum alarm limit to rtc core
2023-08-27 23:50:22 +02:00
rtc-ds1307.c
rtc: ds1307: stop disabling alarms on probe
2025-05-29 11:12:54 +02:00
rtc-ds1343.c
spi: make remove callback a void function
2022-02-09 13:00:45 +00:00
rtc-ds1347.c
rtc: ds1347: fix value written to century register
2022-11-15 21:01:51 +01:00
rtc-ds1374.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-ds1390.c
rtc: ds1390: mark OF related data as maybe unused
2023-03-17 23:23:22 +01:00
rtc-ds1511.c
rtc: ds1511: set alarm offset limit
2024-02-29 22:16:52 +01:00
rtc-ds1553.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-ds1672.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-ds1685.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-ds1742.c
rtc: Explicitly include correct DT includes
2023-07-27 23:31:29 +02:00
rtc-ds2404.c
rtc: ds2404: Convert to GPIO descriptors
2023-08-17 00:55:56 +02:00
rtc-ds3232.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-efi.c
rtc: efi: fixed typo in efi_procfs()
2023-10-15 23:01:08 +02:00
rtc-em3027.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-ep93xx.c
rtc: ep93xx: add DT support for Cirrus EP93xx
2023-10-15 23:17:05 +02:00
rtc-fm3130.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-fsl-ftm-alarm.c
rtc: Explicitly include correct DT includes
2023-07-27 23:31:29 +02:00
rtc-ftrtc010.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-gamecube.c
rtc: gamecube: Always reset HW_SRNPROT after read
2022-08-23 22:27:58 +02:00
rtc-generic.c
…
rtc-goldfish.c
rtc: add missing MODULE_DESCRIPTION() macro
2024-06-28 00:24:43 +02:00
rtc-hid-sensor-time.c
module: Convert symbol namespace to string literal
2024-12-02 11:34:44 -08:00
rtc-hym8563.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-imx-sc.c
rtc: imx-sc: remove .read_alarm
2021-04-29 23:03:26 +02:00
rtc-imx-sm-bbm.c
rtc: support i.MX95 BBM RTC
2024-08-28 21:54:51 +01:00
rtc-imxdi.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-isl1208.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-isl12022.c
rtc: isl12022: Replace uint8_t types with u8
2024-11-11 00:06:46 +01:00
rtc-isl12026.c
rtc: isl12026: Drop "_new" from probe callback name
2023-07-27 23:32:08 +02:00
rtc-jz4740.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-loongson.c
rtc: loongson: clear TOY_MATCH0_REG in loongson_rtc_isr()
2025-01-13 00:39:36 +01:00
rtc-lp8788.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-lpc24xx.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-lpc32xx.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-m41t80.c
[tree-wide] finally take no_llseek out
2024-09-27 08:18:43 -07:00
rtc-m41t93.c
…
rtc-m41t94.c
…
rtc-m48t35.c
…
rtc-m48t59.c
rtc: m48t59: Use platform_data struct for year offset value
2024-11-18 14:31:57 +01:00
rtc-m48t86.c
rtc: m48t86: add DT support for m48t86
2023-08-28 00:01:51 +02:00
rtc-ma35d1.c
rtc: ma35d1: remove hardcoded UIE support
2024-01-08 01:33:27 +01:00
rtc-max6900.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-max6902.c
…
rtc-max6916.c
…
rtc-max8907.c
rtc: max8907: Drop unused i2c include
2023-02-01 09:13:35 +01:00
rtc-max8925.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-max8997.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-max8998.c
…
rtc-max31335.c
move asm/unaligned.h to linux/unaligned.h
2024-10-02 17:23:23 -04:00
rtc-max77686.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-mc13xxx.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-mc146818-lib.c
rtc: rtc-mc146818-lib: Use is_leap_year instead of calculate leap years
2024-11-10 23:02:43 +01:00
rtc-mcp795.c
rtc: mcp795: drop unneeded MODULE_ALIAS
2024-04-17 01:39:35 +02:00
rtc-meson-vrtc.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-meson.c
rtc: meson: Fix email address in MODULE_AUTHOR
2022-05-18 00:20:39 +02:00
rtc-moxart.c
rtc: moxart: switch to using gpiod API
2023-02-09 23:31:46 +01:00
rtc-mpc5121.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-mpfs.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-msc313.c
rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe()
2022-12-11 18:14:01 +01:00
rtc-msm6242.c
…
rtc-mt2712.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-mt6397.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-mt7622.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-mv.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-mxc_v2.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-mxc.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-nct3018y.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-ntxec.c
rtc: New driver for RTC in Netronix embedded controller
2021-03-10 11:06:33 +00:00
rtc-nxp-bbnsm.c
rtc: bbnsm: add remove hook
2024-11-11 11:47:58 +01:00
rtc-omap.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-opal.c
rtc: opal: switch to RTC_FEATURE_UPDATE_INTERRUPT
2022-03-23 19:58:39 +01:00
rtc-optee.c
rtc: optee: add RTC driver for OP-TEE RTC PTA
2022-03-25 11:42:50 +01:00
rtc-palmas.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-pcap.c
rtc: pcap: Drop no-op remove function
2023-10-13 12:29:08 +02:00
rtc-pcf2123.c
rtc: pcf2123: use IRQ flags obtained from fwnode
2023-02-01 09:13:35 +01:00
rtc-pcf2127.c
rtc: pcf2127: add BSM support
2025-01-29 00:42:29 +01:00
rtc-pcf8523.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-pcf8563.c
rtc: pcf8563: Switch to regmap
2024-11-11 22:13:39 +01:00
rtc-pcf8583.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-pcf50633.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-pcf85063.c
rtc: pcf85063: do a SW reset if POR failed
2025-05-02 08:02:04 +02:00
rtc-pcf85363.c
rtc: pcf85363: fix wrong mask/val parameters in regmap_update_bits call
2023-10-15 22:37:57 +02:00
rtc-pic32.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-pl030.c
amba: Make the remove callback return void
2021-02-02 14:25:50 +01:00
rtc-pl031.c
rtc: pl031: fix rtc features null pointer dereference
2022-03-23 19:58:37 +01:00
rtc-pm8xxx.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-ps3.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-pxa.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-r7301.c
rtc: rtc7301: Support byte-addressed IO
2023-10-15 22:37:25 +02:00
rtc-r9701.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-rc5t583.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-rc5t619.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-renesas-rtca3.c
rtc: renesas-rtca3: Disable interrupts only if the RTC is enabled
2025-04-10 14:44:37 +02:00
rtc-rk808.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-rp5c01.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-rs5c313.c
rtc: rs5c313: correct some spelling mistakes
2022-12-15 23:34:31 +01:00
rtc-rs5c348.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-rs5c372.c
rtc: rs5c372: fix Wvoid-pointer-to-enum-cast warning
2023-08-16 01:32:08 +02:00
rtc-rtd119x.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-rv3028.c
rtc: rv3028: fix RV3028_TS_COUNT type
2024-11-18 12:14:13 +01:00
rtc-rv3029c2.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-rv3032.c
rtc: rv3032: fix EERD location
2025-05-29 11:12:40 +02:00
rtc-rv8803.c
rtc: rv8803: add wakeup-source support
2024-01-15 22:29:48 +01:00
rtc-rx4581.c
…
rtc-rx6110.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-rx8010.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-rx8025.c
rtc: Switch i2c drivers back to use .probe()
2023-06-06 23:29:37 +02:00
rtc-rx8111.c
rtc: rx8111: handle VLOW flag
2024-05-07 23:40:10 +02:00
rtc-rx8581.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-rzn1.c
rtc: rzn1: reduce register access
2024-11-25 23:32:50 +01:00
rtc-s3c.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-s3c.h
…
rtc-s5m.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-s35390a.c
rtc: s35390a: Drop vendorless compatible string from match table
2024-09-12 00:15:49 +02:00
rtc-sa1100.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-sa1100.h
…
rtc-sc27xx.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-sd2405al.c
rtc: Add driver for SD2405AL
2024-09-12 00:33:24 +02:00
rtc-sd3078.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-sh.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-snvs.c
rtc: snvs: Allow a time difference on clock register read
2022-11-15 21:25:44 +01:00
rtc-spear.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-ssd202d.c
rtc: Add support for the SSD202D RTC
2023-10-16 16:54:15 +02:00
rtc-st-lpc.c
rtc: st-lpc: Use IRQF_NO_AUTOEN flag in request_irq()
2024-11-10 23:01:59 +01:00
rtc-starfire.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-stk17ta8.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-stm32.c
rtc: stm32: Use syscon_regmap_lookup_by_phandle_args
2025-01-13 09:33:39 +01:00
rtc-stmp3xxx.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-sun4v.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-sun6i.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-sunplus.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-sunxi.c
rtc: Explicitly include correct DT includes
2023-07-27 23:31:29 +02:00
rtc-tegra.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-test.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-ti-k3.c
rtc: Explicitly include correct DT includes
2023-07-27 23:31:29 +02:00
rtc-tps6586x.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-tps6594.c
rtc: tps6594: Fix integer overflow on 32bit systems
2025-01-13 00:20:55 +01:00
rtc-tps65910.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-twl.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-vt8500.c
rtc: Switch back to struct platform_driver::remove()
2024-11-10 22:58:28 +01:00
rtc-wilco-ec.c
rtc: rework rtc_register_device() resource management
2020-11-19 12:50:12 +01:00
rtc-wm831x.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-wm8350.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-x1205.c
rtc: Drop explicit initialization of struct i2c_device_id::driver_data to 0
2024-07-07 00:40:29 +02:00
rtc-xgene.c
rtc: use boolean values with device_init_wakeup()
2025-01-09 18:29:24 +01:00
rtc-zynqmp.c
rtc: zynqmp: Fix optional clock name property
2025-01-13 00:41:24 +01:00
sysfs.c
rtc: Include <linux/kstrtox.h> when appropriate
2022-11-15 21:01:51 +01:00