The LPC32xx RTC is a 32bit second counter.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

This allows further improvement of the driver.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

With calling dev_pm_set_wake_irq() to set MXC_V2 RTC as wakeup source
for suspend, generic wake irq mechanism will automatically enable
it as wakeup source when suspend, then the suspend/resume callback
which are ONLY for enabling/disabling irq wake can be removed, it
simplifies the code.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

With calling dev_pm_set_wake_irq() to set MXC RTC as wakeup source
for suspend, generic wake irq mechanism will automatically enable
it as wakeup source when suspend, then the suspend/resume callback
which are ONLY for enabling/disabling irq wake can be removed, it
simplifies the code.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The commit 1921cab1 ("rtc: rx8025: Switch to use %ptR") converted
the driver to use new %p extension, but actually used wrong type of
the parameter in one case.

Fix a parameter to %ptR in rx8025_read_alarm().
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Fix sparse warning:

drivers/rtc/rtc-sirfsoc.c:282:28: warning:
 symbol 'sysrtc_regmap_config' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use SPDX-License-Identifier instead of the custom license line.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use .set_time instead of the deprecated .set_mmss64.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The ab3100 has a 48bit counter running at 65536 Hz (despite one of the
comment). The max value is then (2^48 - 1)/2^16 == 2^32 - 1.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use SPDX-License-Identifier instead of a verbose license text.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

It is not necessary to forward declare pcf85363_driver as it is not used
before being declared.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

regmap is abstracting the i2c functionalities the best it can, there is no
need to check.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

This is a standard BCD RTC that will fail in 2100.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

pcf85363->dev is unused, remove it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use SPDX-License-Identifier instead of a verbose license text.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use .set_time instead of the deprecated .set_mmss.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Call the 64bit versions of rtc_tm time conversion now that the range is
enforced by the core.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

From the datasheet: "HW_RTC_SECONDS provides access to the 32-bit real-time
seconds counter."
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use SPDX-License-Identifier instead of a verbose license text.
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Call the 64bit versions of rtc_tm time conversion now that the range is
enforced by the core.
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The Tegra 20 RTC is a 32bit seconds counter (with an unused millisecond
counter).
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use SPDX-License-Identifier instead of the custom license line.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use .set_time instead of the deprecated .set_mmss.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Call the 64bit versions of rtc_tm time conversion now that the range is
enforced by the core.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The COH 901 331 is a 32bit seconds counter.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use %ptR to simplify debug message.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use SPDX-License-Identifier instead of a verbose license text.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use .set_time instead of the deprecated .set_mmss.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use the 64bit version of rtc_time_to_tm.rtc_time_to_tm.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

ds1672_get_datetime and ds1672_set_mmss are only used after casting dev
to an i2c_client. Remove that useless indirection.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Remove the control sysfs file as it is not documented, read only and was
only used to provide the oscillator state.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Return -EINVAL when trying to read an invalid time instead of just probe
because this is a useful information for userspace.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The ds1672 is a 32bit seconds counter.

Also remove erroneous comment claiming that epoch is set to 2000, it was
not.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Use .set_time instead of the deprecated .set_mmss64.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

When setting rtc alarm (RTC_WKALM_SET), the tm_year is not checked if it
is in suiteable range. Use INT_MAX - 1900 to check it.

UBSAN: Undefined behaviour in drivers/rtc/rtc-lib.c:119:30
signed integer overflow:
2147483647 + 1900 cannot be represented in type 'int'
CPU: 1 PID: 20994 Comm: syz-executor0 Not tainted 4.19.18-514.55.6.9.x86_64
+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1
04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 ubsan_epilogue+0xe/0x81 lib/ubsan.c:159
 handle_overflow+0x193/0x1e2 lib/ubsan.c:190
 rtc_tm_to_time64+0x267/0x280 drivers/rtc/rtc-lib.c:119
 rtc_tm_to_ktime+0x16/0x70 drivers/rtc/rtc-lib.c:129
 rtc_set_alarm+0x1a9/0x2d0 drivers/rtc/interface.c:466
 rtc_dev_ioctl+0x6db/0x810 drivers/rtc/rtc-dev.c:380
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1a5/0x10b0 fs/ioctl.c:690
 ksys_ioctl+0x89/0xa0 fs/ioctl.c:705
 __do_sys_ioctl fs/ioctl.c:712 [inline]
 __se_sys_ioctl fs/ioctl.c:710 [inline]
 __x64_sys_ioctl+0x74/0xb0 fs/ioctl.c:710
 do_syscall_64+0xc8/0x580 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462589
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89
f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08
0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8
64 89 01 48
RSP: 002b:00007f5348896c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000072bf00 RCX: 0000000000462589
RDX: 0000000020000000 RSI: 000000004028700f RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f53488976bc
R13: 00000000004bf67e R14: 00000000006f96e0 R15: 00000000ffffffff

==========================================================================
Signed-off-by: Xuefeng Wang <wxf.wang@hisilicon.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The mentioned function pointer is long gone since early 2011. Remove the
reference in the comment and reword it slightly.

Fixes: 51ba60c5 ("RTC: Cleanup rtc_class_ops->update_irq_enable()")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Remove the unused "depends on I2C" as the config options are already
guarded by if I2C.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Allow reading the oscillator status bit. Also allow clearing it even if
that makes little sense and can't be done in a race free way.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The PCF850363 has an offset correction with two modes:

With mode 0, the correction is triggered once every two hours and then
correction pulses are applied once per minute until the programmed
correction values have been implemented. This gives a step of 4.34 ppm.

With mode 1, the correction is triggered once every four minutes and then
correction pulses are applied once per second up to a maximum of 60 pulses.
When correction values greater than 60 pulses are used, additional
correction pulses are made in the 59 th second. This gives a step of 4.069
ppm.

Use the correction closest to the requested value.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

The pcf85063 has one byte of nvram.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>