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Mateusz Jończyk 949bae0282 rtc: cmos: avoid UIP when writing alarm time 
[ Upstream commit cd17420ebea580c22dd3a93f7237de3d2cfafc37 ]

Some Intel chipsets disconnect the time and date RTC registers when the
clock update is in progress: during this time reads may return bogus
values and writes fail silently. This includes the RTC alarm registers.
[1]

cmos_set_alarm() did not take account for that, fix it.

[1] 7th Generation Intel ® Processor Family I/O for U/Y Platforms [...]
Datasheet, Volume 1 of 2 (Intel's Document Number: 334658-006)
Page 208
https://www.intel.com/content/dam/www/public/us/en/documents/datasheets/7th-and-8th-gen-core-family-mobile-u-y-processor-lines-i-o-datasheet-vol-1.pdf
        "If a RAM read from the ten time and date bytes is attempted
        during an update cycle, the value read do not necessarily
        represent the true contents of those locations. Any RAM writes
        under the same conditions are ignored."

Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20211210200131.153887-10-mat.jonczyk@o2.pl
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-14 11:31:56 +01:00
..
class.c
rtc: fix use-after-free on device removal
2022-05-25 09:17:52 +02:00
dev.c
compat_ioctl: move rtc handling into drivers/rtc/dev.c
2019-10-23 17:23:43 +02:00
interface.c
rtc: check if __rtc_read_time was successful
2022-04-08 14:40:40 +02:00
Kconfig
rtc: rx8010: select REGMAP_I2C
2021-09-26 14:09:02 +02:00
lib.c
rtc: lib: check whether tm->tm_year in int32 range
2019-04-06 15:05:31 +02:00
Makefile
rtc: rv3032: Add a driver for Microcrystal RV-3032
2020-10-19 22:47:56 +02:00
nvmem.c
…
proc.c
rtc: fix snprintf() checking in is_rtc_hctosys()
2021-07-20 16:05:55 +02:00
rtc-88pm80x.c
rtc: remove superfluous error message
2019-08-21 09:57:23 +02:00
rtc-88pm860x.c
rtc: 88pm860x: remove useless range check
2020-04-18 22:42:06 +02:00
rtc-ab3100.c
rtc: ab3100: convert to SPDX identifier
2019-04-11 16:42:55 +02:00
rtc-ab8500.c
rtc: ab8500: switch to rtc_time64_to_tm/rtc_tm_to_time64
2020-03-16 11:12:11 +01:00
rtc-ab-b5ze-s3.c
rtc: Replace HTTP links with HTTPS ones
2020-07-16 11:17:52 +02:00
rtc-ab-eoz9.c
rtc: remove superfluous error message
2019-08-21 09:57:23 +02:00
rtc-abx80x.c
rtc: abx80x: Provide debug feedback for invalid dt properties
2020-06-06 00:16:24 +02:00
rtc-ac100.c
rtc: remove superfluous error message
2019-08-21 09:57:23 +02:00
rtc-armada38x.c
rtc: armada38x: Use of_device_get_match_data()
2019-10-07 15:49:20 +02:00
rtc-as3722.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
rtc-asm9260.c
rtc: asm9260: add the missed check for devm_clk_get
2019-12-23 11:16:23 +01:00
rtc-aspeed.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-at91rm9200.c
rtc: at91rm9200: use FIELD_PREP/FIELD_GET
2020-01-15 15:11:10 +01:00
rtc-at91sam9.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-au1xxx.c
rtc: au1xxx: switch to rtc_time64_to_tm/rtc_tm_to_time64
2020-03-16 11:12:09 +01:00
rtc-bd70528.c
rtc: bd70528: Avoid double error messaging when IRQ absent
2020-03-23 09:27:17 +01:00
rtc-bq32k.c
rtc: Replace HTTP links with HTTPS ones
2020-07-16 11:17:52 +02:00
rtc-bq4802.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
rtc-brcmstb-waketimer.c
rtc: brcmstb-waketimer: add missed clk_disable_unprepare
2019-11-08 16:14:09 +01:00
rtc-cadence.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-cmos.c
rtc: cmos: avoid UIP when writing alarm time
2022-12-14 11:31:56 +01:00
rtc-coh901331.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-core.h
…
rtc-cpcap.c
rtc: cpcap: fix range
2020-07-02 22:32:00 +02:00
rtc-cros-ec.c
cros_ec: treewide: Remove 'include/linux/mfd/cros_ec.h'
2020-01-07 17:36:46 +01:00
rtc-da9052.c
rtc: da9052: switch to rtc_time64_to_tm/rtc_tm_to_time64
2020-04-01 12:33:43 +02:00
rtc-da9055.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtc-da9063.c
rtc: da9063: Handle invalid IRQ from platform_get_irq_byname()
2019-10-07 15:49:18 +02:00
rtc-davinci.c
rtc: davinci: remove useless error handling
2020-03-16 11:12:09 +01:00
rtc-digicolor.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-dm355evm.c
rtc: dm355evm: convert to SPDX identifier
2019-04-04 10:07:09 +02:00
rtc-ds1216.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-ds1286.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-ds1302.c
rtc: ds1302: Remove unused DRV_NAME
2019-11-15 11:58:14 +01:00
rtc-ds1305.c
rtc: ds1305: switch to rtc_tm_to_time64
2020-03-16 11:12:10 +01:00
rtc-ds1307.c
rtc: ds1307: Fix wday settings for rx8130
2021-05-19 10:13:05 +02:00
rtc-ds1343.c
rtc: ds1343: Remove unused struct spi_device in struct ds1343_priv
2019-12-23 11:22:32 +01:00
rtc-ds1347.c
rtc: ds1347: handle century register
2019-10-07 15:49:38 +02:00
rtc-ds1374.c
rtc: ds1374: remove unused define
2020-07-21 09:56:46 +02:00
rtc-ds1390.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-ds1511.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-ds1553.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-ds1672.c
rtc: ds1672: remove unnecessary check
2019-08-21 09:57:23 +02:00
rtc-ds1685.c
rtc: ds1685: Fix bank switching to avoid endless loop
2020-09-15 11:24:29 +02:00
rtc-ds1742.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-ds2404.c
rtc: ds2404: use hw endiannes variable
2019-05-23 17:42:25 +02:00
rtc-ds3232.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtc-efi.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtc-em3027.c
rtc: em3027: correct month value
2019-11-08 16:14:09 +01:00
rtc-ep93xx.c
rtc: ep93xx: Fix NULL pointer dereference in ep93xx_rtc_read_time
2020-12-30 11:54:29 +01:00
rtc-fm3130.c
RTC for 5.3
2019-07-17 10:03:50 -07:00
rtc-fsl-ftm-alarm.c
rtc: fsl-ftm-alarm: add MODULE_TABLE()
2021-05-19 10:13:03 +02:00
rtc-ftrtc010.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
2019-05-30 11:26:37 -07:00
rtc-generic.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
rtc-goldfish.c
rtc: goldfish: Enable interrupt in set_alarm() when necessary
2020-07-16 11:15:43 +02:00
rtc-hid-sensor-time.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335
2019-06-05 17:37:06 +02:00
rtc-hym8563.c
rtc: hym8563: Read the valid flag directly instead of caching it
2019-12-23 11:18:06 +01:00
rtc-imx-sc.c
rtc: imx-sc: Align imx sc msg structs to 4
2020-03-29 22:08:35 +02:00
rtc-imxdi.c
rtc: imxdi: fix trivial typos
2020-07-02 22:32:01 +02:00
rtc-isl1208.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtc-isl12022.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-isl12026.c
rtc: isl12026: convert to i2c_new_dummy_device
2019-07-22 22:30:19 +02:00
rtc-jz4740.c
rtc: ingenic: Reset regulator register in probe
2020-05-11 16:35:05 +02:00
rtc-lp8788.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-lpc24xx.c
rtc: remove unnecessary error message after platform_get_irq
2020-04-15 09:56:17 +02:00
rtc-lpc32xx.c
rtc: lpc32xx: remove .remove
2019-11-08 16:14:09 +01:00
rtc-ls1x.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtc-m41t80.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
rtc-m41t93.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-m41t94.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-m48t35.c
rtc: m48t35: remove SGI-IP27 kludge
2020-03-16 11:12:11 +01:00
rtc-m48t59.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-m48t86.c
rtc: Use devm_platform_ioremap_resource()
2019-10-06 21:04:51 +02:00
rtc-max6900.c
…
rtc-max6902.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-max6916.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-max8907.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-max8925.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-max8997.c
…
rtc-max8998.c
…
rtc-max77686.c
rtc: max77686: Do not enforce (incorrect) interrupt trigger type
2021-07-25 14:36:16 +02:00
rtc-mc13xxx.c
rtc: mc13xxx: fix a double-unlock issue
2020-05-11 16:21:50 +02:00
rtc-mc146818-lib.c
rtc: mc146818-lib: extract mc146818_avoid_UIP
2022-12-14 11:31:56 +01:00
rtc-mcp795.c
rtc: Replace HTTP links with HTTPS ones
2020-07-16 11:17:52 +02:00
rtc-meson-vrtc.c
rtc: meson: simplify the return expression of meson_vrtc_probe
2020-09-29 22:19:15 +02:00
rtc-meson.c
rtc: meson: remove redundant assignment to variable retries
2019-11-27 09:31:13 +01:00
rtc-moxart.c
rtc: moxart: Convert to SPDX identifier
2019-12-23 11:23:49 +01:00
rtc-mpc5121.c
rtc: mpc5121: Use correct return value for mpc5121_rtc_probe()
2020-05-30 04:12:38 +02:00
rtc-mrst.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441
2019-06-05 17:37:17 +02:00
rtc-msm6242.c
rtc: msm6242: Remove unneeded msm6242_set()/msm6242_clear() functions
2019-11-18 15:23:54 +01:00
rtc-mt2712.c
rtc: mt2712: switch to devm_platform_ioremap_resource
2020-04-18 22:42:04 +02:00
rtc-mt6397.c
rtc: mt6397: check return value after calling platform_get_resource()
2022-06-14 18:32:33 +02:00
rtc-mt7622.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-mv.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-mxc_v2.c
rtc: mxc_v2: add missing MODULE_DEVICE_TABLE
2021-07-25 14:36:12 +02:00
rtc-mxc.c
rtc: mxc: Use devm_add_action_or_reset() for calls to clk_disable_unprepare()
2020-03-22 22:10:41 +01:00
rtc-omap.c
rtc: omap: drop unused dt-bindings header
2020-03-23 09:27:17 +01:00
rtc-opal.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114
2019-05-24 17:39:01 +02:00
rtc-palmas.c
…
rtc-pcap.c
rtc: pcap: convert to SPDX identifier
2019-05-08 22:14:36 +02:00
rtc-pcf2123.c
rtc: pcf2123: add proper compatible string
2019-08-20 21:42:19 +02:00
rtc-pcf2127.c
rtc: pcf2127: fix bug when reading alarm registers
2022-05-25 09:17:52 +02:00
rtc-pcf8523.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
rtc-pcf8563.c
rtc: pcf8563: Use BIT
2019-12-23 11:23:53 +01:00
rtc-pcf8583.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-pcf50633.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtc-pcf85063.c
rtc: pcf85063: fallback to parent of_node
2021-05-26 12:06:57 +02:00
rtc-pcf85363.c
rtc: pcf85363/pcf85263: fix regmap error in set_time
2019-09-01 08:48:28 +02:00
rtc-pic32.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-pl030.c
amba: Make the remove callback return void
2022-04-08 14:40:02 +02:00
rtc-pl031.c
amba: Make the remove callback return void
2022-04-08 14:40:02 +02:00
rtc-pm8xxx.c
rtc: pm8xxx: clear alarm register when alarm is not enabled
2020-03-23 09:27:17 +01:00
rtc-ps3.c
rtc: ps3: set range
2019-04-04 10:07:10 +02:00
rtc-pxa.c
rtc: pxa: fix null pointer dereference
2022-01-27 10:54:33 +01:00
rtc-r7301.c
rtc: Use devm_platform_ioremap_resource()
2019-10-06 21:04:51 +02:00
rtc-r9701.c
rtc: r9701: set range
2020-10-19 22:48:55 +02:00
rtc-rc5t583.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
2019-05-30 11:29:52 -07:00
rtc-rc5t619.c
rtc: rc5t619: Fix an ERR_PTR vs NULL check
2020-04-15 09:58:24 +02:00
rtc-rk808.c
rtc: Remove dev_err() usage after platform_get_irq()
2019-08-13 10:53:10 +02:00
rtc-rp5c01.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
rtc-rs5c313.c
rtc: rtc-rs5c313: Convert to module_platform_driver()
2020-08-21 00:13:44 +02:00
rtc-rs5c348.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-rs5c372.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-rtd119x.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-rv3028.c
rtc: rv3028: ensure ram configuration registers are saved
2020-10-15 12:09:35 +02:00
rtc-rv3029c2.c
rtc: rv3029: remove useless error messages
2019-12-23 11:16:23 +01:00
rtc-rv3032.c
rtc: rv3032: fix error handling in rv3032_clkout_set_rate()
2021-11-18 14:04:23 +01:00
rtc-rv8803.c
rtc: rv8803: simplify the return expression of rv8803_nvram_write
2020-09-29 22:20:10 +02:00
rtc-rx4581.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-rx6110.c
rtc: rx6110: Convert to SPDX identifier
2019-11-15 11:58:12 +01:00
rtc-rx8010.c
rtc: rx8010: rename rx8010_init_client() to rx8010_init()
2020-09-29 22:18:10 +02:00
rtc-rx8025.c
rtc: rx8025: Remove struct i2c_client from struct rx8025_data
2019-12-23 11:22:21 +01:00
rtc-rx8581.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-s3c.c
rtc: s3c: Simplify with dev_err_probe()
2020-09-15 10:42:36 +02:00
rtc-s3c.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-s5m.c
rtc: s5m: convert to i2c_new_dummy_device
2019-07-23 20:34:31 +02:00
rtc-s35390a.c
rtc: s35390a: set range
2019-10-19 22:33:05 +02:00
rtc-sa1100.c
rtc: sa1100: switch to rtc_time64_to_tm/rtc_tm_to_time64
2020-03-16 11:12:09 +01:00
rtc-sa1100.h
…
rtc-sc27xx.c
rtc: sc27xx: remove .remove
2019-11-08 16:14:09 +01:00
rtc-sd3078.c
rtc: remove superfluous error message
2019-08-21 09:57:23 +02:00
rtc-sh.c
rtc: sh: Restore devm_ioremap() alignment
2020-02-12 12:21:40 +01:00
rtc-sirfsoc.c
rtc: sirfsoc: switch to rtc_time64_to_tm/rtc_tm_to_time64
2020-03-16 11:12:09 +01:00
rtc-snvs.c
rtc: snvs: Add necessary clock operations for RTC APIs
2020-05-30 03:17:48 +02:00
rtc-spear.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-st-lpc.c
rtc: st-lpc: Constify st_rtc_ops
2020-09-15 11:21:50 +02:00
rtc-starfire.c
rtc: starfire: switch to rtc_time64_to_tm
2020-03-16 11:12:09 +01:00
rtc-stk17ta8.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-stm32.c
rtc: stm32: Fix unbalanced clk_disable_unprepare() on probe error path
2021-07-14 16:55:44 +02:00
rtc-stmp3xxx.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
rtc-sun4v.c
rtc: sun4v: switch to SPDX identifier
2019-04-04 10:07:10 +02:00
rtc-sun6i.c
rtc: sun6i: Fix time overflow handling
2022-05-25 09:17:53 +02:00
rtc-sunxi.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-tegra.c
rtc: tegra: remove set but unused variable
2019-11-27 09:31:13 +01:00
rtc-test.c
rtc: test: enable wakeup flags
2019-05-23 17:44:52 +02:00
rtc-tps6586x.c
rtc: tps6586x: Use IRQ_NOAUTOEN flag
2020-01-25 21:50:18 +01:00
rtc-tps65910.c
rtc: tps65910: Correct driver module alias
2021-09-18 13:40:05 +02:00
rtc-tps80031.c
…
rtc-twl.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
rtc-tx4939.c
rtc: use devm_platform_ioremap_resource() to simplify code
2019-10-07 01:07:35 +02:00
rtc-v3020.c
rtc: v3020: remove set but unused variable
2019-11-27 09:31:13 +01:00
rtc-vr41xx.c
compat_ioctl: move rtc handling into drivers/rtc/dev.c
2019-10-23 17:23:43 +02:00
rtc-vt8500.c
rtc: vt8500: let the core handle rtc range
2019-10-19 22:33:15 +02:00
rtc-wilco-ec.c
rtc: wilco-ec: Handle reading invalid times
2019-10-14 17:49:17 +02:00
rtc-wm831x.c
rtc: wm831x: Add IRQF_ONESHOT flag
2019-07-13 21:39:51 +02:00
rtc-wm8350.c
rtc: wm8350: Handle error for wm8350_register_irq
2022-04-13 21:00:54 +02:00
rtc-x1205.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
rtc-xgene.c
rtc: xgene: Remove unused struct device in struct xgene_rtc_dev
2019-11-27 09:31:14 +01:00
rtc-zynqmp.c
rtc: zynqmp: Clear alarm interrupt status before interrupt enable
2020-02-12 12:21:42 +01:00
sysfs.c
rtc: sysfs: use kobj_to_dev
2020-03-16 11:12:08 +01:00
systohc.c
rtc: drop set_mms and set_mmss64
2019-05-08 22:14:36 +02:00