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linux/drivers/rtc
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Antonio Borneo f69cb2d603 rtc: stm32: use the proper register sequence to read date/time 
Date and time are read from two separate RTC registers.
To ensure consistency between the two registers, reading the time
register locks the values in the shadow date register until the
date register is read.
Thus, the whole date/time read requires reading the time register
first, followed by reading the date register.
If the reads are done in reversed order, the shadow date register
will remain locked until a future read operation. The future read
will read the former date value that could be already invalid.

Fix the read order of date/time registers in stm32_rtc_valid_alrm()

Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230705174357.353616-2-valentin.caron@foss.st.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2023-07-27 23:03:33 +02:00
..
class.c driver core: class: remove module * from class_create() 2023-03-17 15:16:33 +01:00
dev.c rtc: Remove unused rtc_dev_exit(). 2022-06-24 21:24:02 +02:00
interface.c rtc: allow rtc_read_alarm without read_alarm callback 2023-02-22 12:32:05 +01:00
Kconfig rtc: pcf2127: add support for PCF2131 RTC 2023-07-27 22:54:52 +02:00
lib.c rtc: Improve performance of rtc_time64_to_tm(). Add tests. 2021-08-10 00:09:21 +02:00
lib_test.c rtc: lib_test: add MODULE_LICENSE 2021-08-10 23:21:46 +02:00
Makefile rtc: Add rtc driver for the Loongson family chips 2023-06-26 01:19:11 +02:00
nvmem.c rtc: nvmem: emit an error message when nvmem registration fails 2020-11-19 12:50:12 +01:00
proc.c rtc: fix snprintf() checking in is_rtc_hctosys() 2021-05-25 00:36:11 +02:00
rtc-88pm80x.c rtc: 88pm80x: Convert to platform remove callback returning void 2023-03-17 23:03:16 +01:00
rtc-88pm860x.c rtc: 88pm860x: Convert to platform remove callback returning void 2023-03-17 23:03:16 +01:00
rtc-ab-b5ze-s3.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-ab-eoz9.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-ab8500.c rtc: ab8500: Convert to platform remove callback returning void 2023-03-17 23:03:16 +01:00
rtc-abx80x.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-ac100.c rtc: ac100: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-armada38x.c rtc: armada38x: use devm_platform_ioremap_resource_byname() 2023-04-28 08:07:23 +02:00
rtc-as3722.c
rtc-asm9260.c rtc: asm9260: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-aspeed.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-at91rm9200.c rtc: at91rm9200: Fix syntax errors in comments 2022-12-15 23:34:31 +01:00
rtc-at91sam9.c rtc: at91sam9: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-au1xxx.c rtc: au1xxx: convert to SPDX identifier 2021-07-10 01:53:39 +02:00
rtc-bd70528.c rtc: bd70528: Drop BD70528 support 2021-06-20 22:24:52 +02:00
rtc-bq32k.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-bq4802.c
rtc-brcmstb-waketimer.c rtc: brcmstb-waketimer: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-cadence.c rtc: cadence: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-cmos.c rtc: cmos: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-core.h rtc: Remove unused rtc_dev_exit(). 2022-06-24 21:24:02 +02:00
rtc-cpcap.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-cros-ec.c rtc: cros-ec: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-da9052.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-da9055.c
rtc-da9063.c rtc: da9063: add as wakeup source 2021-12-02 23:23:38 +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 spi: make remove callback a void function 2022-02-09 13:00:45 +00:00
rtc-ds1307.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +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: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +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: remove unused function 2021-04-17 11:21:04 +02:00
rtc-ds1553.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-ds1672.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-ds1685.c rtc: ds1685: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-ds1742.c rtc: ds1742: use devm_platform_get_and_ioremap_resource() 2022-12-15 23:34:31 +01:00
rtc-ds2404.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-ds3232.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-efi.c rtc: efi: Avoid spamming the log on RTC read failure 2023-02-22 21:07:53 +01:00
rtc-em3027.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-ep93xx.c rtc: ep93xx: Fix NULL pointer dereference in ep93xx_rtc_read_time 2020-12-03 23:49:31 +01:00
rtc-fm3130.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-fsl-ftm-alarm.c rtc: fsl-ftm-alarm: Use module_platform_driver replace device_initcall 2022-11-15 21:01:51 +01:00
rtc-ftrtc010.c rtc: ftrtc010: Convert to platform remove callback returning void 2023-03-17 23:03:17 +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 clocksource/drivers: Add a goldfish-timer clocksource 2022-04-11 11:48:01 +02:00
rtc-hid-sensor-time.c rtc: hid-sensor-time: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-hym8563.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-imx-sc.c rtc: imx-sc: remove .read_alarm 2021-04-29 23:03:26 +02:00
rtc-imxdi.c rtc: imxdi: add wakeup support 2021-05-25 00:41:25 +02:00
rtc-isl1208.c rtc: isl1208: Add support for the built-in RTC on the PMIC RAA215300 2023-06-26 00:58:21 +02:00
rtc-isl12022.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-isl12026.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-jz4740.c rtc: jz4740: Make sure clock provider gets removed 2023-04-28 08:07:23 +02:00
rtc-loongson.c rtc: Add rtc driver for the Loongson family chips 2023-06-26 01:19:11 +02:00
rtc-lp8788.c
rtc-lpc24xx.c rtc: lpc24xx: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-lpc32xx.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-m41t80.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-m41t93.c
rtc-m41t94.c
rtc-m48t35.c rtc: m48t35: remove SGI-IP27 kludge 2020-03-16 11:12:11 +01:00
rtc-m48t59.c rtc: m48t59: use platform_get_irq_optional 2021-03-11 09:48:09 +01:00
rtc-m48t86.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-max6900.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +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-max8997.c
rtc-max8998.c
rtc-max77686.c rtc: max77686: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-mc13xxx.c rtc: mc13xxx: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-mc146818-lib.c rtc: mc146818-lib: reduce RTC_UIP polling period 2022-06-24 21:23:50 +02:00
rtc-mcp795.c rtc: mcp795: Add SPI ID table 2021-10-01 23:28:28 +02:00
rtc-meson-vrtc.c rtc: meson-vrtc: Use ktime_get_real_ts64() to get the current time 2023-03-21 21:15:10 +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: mpc5121: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-mpfs.c rtc: mpfs: Convert to platform remove callback returning void 2023-03-17 23:03:17 +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: mt6397: check return value after calling platform_get_resource() 2022-05-19 12:05:48 +02:00
rtc-mt7622.c rtc: mt7622: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-mv.c rtc: mv: remove mv_rtc_alarm_ops 2021-01-16 23:19:26 +01:00
rtc-mxc.c rtc: mxc: Use devm_clk_get_enabled() helper 2022-08-23 22:33:38 +02:00
rtc-mxc_v2.c rtc: mxc_v2: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-nct3018y.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +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 the bbnsm rtc support 2023-02-22 12:25:32 +01:00
rtc-omap.c rtc: omap: include header for omap_rtc_power_off_program prototype 2023-03-17 23:22:45 +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: palmas: Convert to platform remove callback returning void 2023-03-17 23:03:17 +01:00
rtc-pcap.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
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 UIE support for PCF2131 2023-07-27 22:54:53 +02:00
rtc-pcf8523.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-pcf8563.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-pcf8583.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-pcf50633.c rtc: pcf50633: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-pcf85063.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-pcf85363.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-pic32.c rtc: pic32: Convert to platform remove callback returning void 2023-03-17 23:03:18 +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: pm8xxx: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-ps3.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-pxa.c ARM: pxa: split up mach/hardware.h 2022-04-19 16:27:05 +02:00
rtc-r7301.c rtc: r7301: Replace spin_lock_irqsave with spin_lock in hard IRQ 2021-02-06 00:50:47 +01:00
rtc-r9701.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-rc5t583.c rtc: rc5t583: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-rc5t619.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-rk808.c rtc: rk808: reduce 'struct rk808' usage 2022-12-11 20:56:33 +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: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rtd119x.c rtc: rtd119x: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-rv3028.c rtc: rv3028: make rv3028 probeable from userspace 2023-06-26 01:05:13 +02:00
rtc-rv3029c2.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rv3032.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rv8803.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rx4581.c
rtc-rx6110.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rx8010.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rx8025.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rx8581.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-rzn1.c rtc: rzn1: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-s3c.c rtc: s3c: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-s3c.h
rtc-s5m.c rtc: s5m: Drop S5M8763 support 2023-04-26 11:40:26 +01:00
rtc-s35390a.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-sa1100.c rtc: sa1100: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-sa1100.h
rtc-sc27xx.c rtc: sc27xx: Fix format of SPDX identifier 2021-07-10 01:53:39 +02:00
rtc-sd3078.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-sh.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +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: spear: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-st-lpc.c rtc: st-lpc: Simplify clk handling in st_rtc_probe() 2023-06-26 00:53:19 +02:00
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 the proper register sequence to read date/time 2023-07-27 23:03:33 +02:00
rtc-stmp3xxx.c rtc: stmp3xxx: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-sun4v.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-sun6i.c rtc: sun6i: Add a determine_rate hook 2023-06-08 18:39:32 -07:00
rtc-sunplus.c rtc: sunplus: use devm_platform_ioremap_resource_byname() 2023-04-28 08:07:23 +02:00
rtc-sunxi.c rtc: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-tegra.c rtc: tegra: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-test.c rtc: test: remove debug message 2020-12-03 23:43:23 +01:00
rtc-ti-k3.c rtc: k3: handle errors while enabling wake irq 2023-03-23 10:50:59 +01:00
rtc-tps6586x.c rtc: tps6586x: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-tps65910.c rtc: tps65910: Correct driver module alias 2021-08-17 23:36:22 +02:00
rtc-twl.c rtc: twl: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-vt8500.c rtc: vt8500: Convert to platform remove callback returning void 2023-03-17 23:03:18 +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: rework rtc_register_device() resource management 2020-11-19 12:50:12 +01:00
rtc-wm8350.c rtc: wm8350: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-x1205.c rtc: Switch i2c drivers back to use .probe() 2023-06-06 23:29:37 +02:00
rtc-xgene.c rtc: xgene: Convert to platform remove callback returning void 2023-03-17 23:03:18 +01:00
rtc-zynqmp.c rtc: zynqmp: Convert to platform remove callback returning void 2023-03-17 23:03:19 +01:00
sysfs.c rtc: Include <linux/kstrtox.h> when appropriate 2022-11-15 21:01:51 +01:00