Merely enabling I2C and RTC selects REGMAP_I2C and REGMAP_SPI, even when
no driver needs it.  While the former can be moduler, the latter cannot,
and thus becomes built-in.

Fix this by moving the select statements for REGMAP_I2C and REGMAP_SPI
from the RTC_I2C_AND_SPI helper to the individual drivers that depend on
it.

Note that the comment for RTC_I2C_AND_SPI refers to SND_SOC_I2C_AND_SPI
for more information, but the latter does not select REGMAP_{I2C,SPI}
itself, and defers that to the individual drivers, too.

Fixes: 080481f5 ("rtc: merge ds3232 and ds3234")
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Reported-by: Nkbuild test robot <lkp@intel.com>
Reported-by: Nkbuild test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20200112171349.22268-1-geert@linux-m68k.orgSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Some i2c RTC drivers are using regmap but are not selecting REGMAP_I2C
which may lead to build failures.

Link: https://lore.kernel.org/r/20200127221724.10160-2-alexandre.belloni@bootlin.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The RTC_DRV_SD3078 is indented using spaces, use tabs instead.

Link: https://lore.kernel.org/r/20200127221724.10160-1-alexandre.belloni@bootlin.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

ROHM BD71828 PMIC RTC block is from many parts similar to one
on BD70528. Support BD71828 RTC using BD70528 RTC driver and
avoid re-inventing the wheel.
Signed-off-by: NMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
	$ sed -e 's/^        /\t/' -i */Kconfig
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20191120133940.13881-1-krzk@kernel.orgSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The Flextimer alarm is primarily used as a wakeup source for system
power management.  But it shouldn't select the power management driver
as they don't really have dependency of each other.

Also remove the default y as it is not a critical feature for the
systems.
Signed-off-by: NLi Yang <leoyang.li@nxp.com>
Link: https://lore.kernel.org/r/1573252856-11759-1-git-send-email-leoyang.li@nxp.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The correct location for this option is under platform driver, not i2c
drivers.

Link: https://lore.kernel.org/r/20191014155840.22554-1-alexandre.belloni@bootlin.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Use of_device_get_match_data() since all platforms should now use DT
bindings. AVR32 architecture has been removed in
commit 26202873 ("avr32: remove support for AVR32 architecture").
Signed-off-by: NClaudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1569500132-21164-1-git-send-email-claudiu.beznea@microchip.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Now, the ChromeOS EC core driver has nothing related to an MFD device, so
move that driver from the MFD subsystem to the platform/chrome subsystem.
Signed-off-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>
Acked-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NThierry Reding <thierry.reding@gmail.com>
Acked-by: NMark Brown <broonie@kernel.org>
Acked-by: NWolfram Sang <wsa@the-dreams.de>
Acked-by: NNeil Armstrong <narmstrong@baylibre.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: NBenjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: NSebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: NChanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: NGwendal Grignou <gwendal@chromium.org>
Tested-by: NGwendal Grignou <gwendal@chromium.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Disable watchdog registation when kernel is build without
watchdog functionality, and enable watchdog core otherwise.
This removes compile errors like the one below:

drivers/rtc/rtc-pcf2127.o: in function `pcf2127_probe.constprop.3':
rtc-pcf2127.c:(.text.unlikely+0x2c8): undefined reference to
`devm_watchdog_register_device'

Watchdog feature in chip will always be configured as
this is safe to do in both cases and minimize code churn.
Reported-by: NHulk Robot <hulkci@huawei.com>
Reported-by: NYueHaibing <yuehaibing@huawei.com>
Fixes: bbc597561ce1 ("rtc: pcf2127: add watchdog feature support")
Signed-off-by: NBruno Thomsen <bruno.thomsen@gmail.com>
Link: https://lore.kernel.org/r/20190827143656.4734-1-bruno.thomsen@gmail.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Add partial support for the watchdog functionality of
both PCF2127 and PCF2129 chips.

The programmable watchdog timer is currently using a fixed
clock source of 1Hz. This result in a selectable range of
1-255 seconds, which covers most embedded Linux use-cases.

Clock sources of 4096Hz, 64Hz and 1/60Hz is mostly useful
in MCU use-cases.

Countdown timer not available when using watchdog feature.
Signed-off-by: NBruno Thomsen <bruno.thomsen@gmail.com>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190822131936.18772-4-bruno.thomsen@gmail.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

For the platforms including LS1012A, LS1021A, LS1028A, LS1043A,
LS1046A, LS1088A, LS208xA that has the FlexTimer
module, implementing alarm functions within RTC subsystem
to wakeup the system when system going to sleep (work with RCPM driver).
Signed-off-by: NBiwen Li <biwen.li@nxp.com>
Link: https://lore.kernel.org/r/20190813030157.48590-1-biwen.li@nxp.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The Amlogic Meson GX SoCs uses a special register to store the
time in seconds to wakeup after a system suspend.

In order to be able to reuse the RTC wakealarm feature, this
driver implements a fake RTC device which uses the system time
to deduce a suspend delay.
Signed-off-by: NNeil Armstrong <narmstrong@baylibre.com>
[khilman: rebase to v5.3-rc, rework and modernization]
Signed-off-by: NKevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20190812232850.8016-3-khilman@kernel.orgSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

With CONFIG_BD70528_WATCHDOG=m, a built-in rtc driver cannot call
into the low-level functions that are part of the watchdog module:

drivers/rtc/rtc-bd70528.o: In function `bd70528_set_time':
rtc-bd70528.c:(.text+0x22c): undefined reference to `bd70528_wdt_lock'
rtc-bd70528.c:(.text+0x2a8): undefined reference to `bd70528_wdt_unlock'
drivers/rtc/rtc-bd70528.o: In function `bd70528_set_rtc_based_timers':
rtc-bd70528.c:(.text+0x50c): undefined reference to `bd70528_wdt_set'

Add a Kconfig dependency which forces RTC to be a module if watchdog is a
module. If watchdog is not compiled at all the stub functions for watchdog
control are used. compiling the RTC without watchdog is fine.

Fixes: 32a4a4eb ("rtc: bd70528: Initial support for ROHM bd70528 RTC")
Suggested-by: NArnd Bergmann <arnd@arndb.de>
Reported-by: Nkbuild test robot <lkp@intel.com>
Signed-off-by: NMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/84462e01e43d39024948a3bdd24087ff87dc2255.1565591387.git.matti.vaittinen@fi.rohmeurope.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The ARM w90x900 platform is getting removed, so this driver is obsolete.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190809202749.742267-15-arnd@arndb.deSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

If REGMAP_SPI is m and RTC_DRV_PCF2123 is y,

drivers/rtc/rtc-pcf2123.o: In function `pcf2123_probe':
rtc-pcf2123.c:(.text+0xb2b): undefined reference to `__devm_regmap_init_spi'

Select REGMAP_SPI as RTC_DRV_DS1347 driver does.
Reported-by: NHulk Robot <hulkci@huawei.com>
Fixes: 790d0339 ("rtc: pcf2123: port to regmap")
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190704085542.48180-1-yuehaibing@huawei.comSigned-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

RK809 and RK817 are power management IC chips for multimedia products.
Most of their functions and registers are same, including the rtc.
Signed-off-by: NTony Xie <tony.xie@rock-chips.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Support RTC block in ROHM bd70528 power management IC. Support
getting and setting the time and date as well as arming an alarm
which can also be used to wake the PMIC from standby state.

HW supports wake interrupt only for the next 24 hours (sec, minute
and hour information only) so we limit also the alarm interrupt to
this 24 hours for the sake of consistency.
Signed-off-by: NMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

TPS65910 entry is already under 'if RTC_CLASS' - remove superfluous
dependency.
Signed-off-by: NMichał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

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

Switch to regmap to simplify register accesses and remove the need for
pcf85063_stop_clock/pcf85063_start_clock.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Read and writes the time to the non-battery backed RTC in the ASPEED BMC
system on chip families.
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

ARCH_AT91 is DT only for a while, drop platform data support.
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Goldfish can be ARM or x86, allow building the driver for more than just
MIPS.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The proper manufacturer name is Shenzhen whwave.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Add support for Epson rx8571 real-time clock. rx8571 rtc is compatible
with rx8581,except that rx8571 has additional 16 bytes of RAM.

16 bytes of nvmem is supported and exposed in sysfs (# is the instance
number,starting with 0): /sys/bus/nvmem/devices/rx8571-#/nvmem
Signed-off-by: NBiju Das <biju.das@bp.renesas.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

This Embedded Controller has an internal RTC that is exposed
as a standard RTC class driver with read/write functionality.

The driver is added to the drivers/rtc/ so that the maintainer of that
directory will be able to comment on this change, as that maintainer is
the expert on this system. In addition, the driver code is called
indirectly after a corresponding device is registered from core.c,
as opposed to core.c registering the driver callbacks directly.

To test:
> hwclock --show --rtc /dev/rtc1
2007-12-31 16:01:20.460959-08:00
> hwclock --systohc --rtc /dev/rtc1
> hwclock --show --rtc /dev/rtc1
2018-11-29 17:08:00.780793-08:00

> hwclock --show --rtc /dev/rtc1
2007-12-31 16:01:20.460959-08:00
> hwclock --systohc --rtc /dev/rtc1
> hwclock --show --rtc /dev/rtc1
2018-11-29 17:08:00.780793-08:00
Signed-off-by: NDuncan Laurie <dlaurie@google.com>
Signed-off-by: NNick Crews <ncrews@chromium.org>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
[Fix the sparse warning: symbol 'wilco_ec_rtc_read/write' was not declared]
Signed-off-by: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NEnric Balletbo i Serra <enric.balletbo@collabora.com>

This patch adds support for AB-RTCMC-32.768kHz-EOZ9 RTC/Calendar
module with I2C interface.
Signed-off-by: NArtem Panfilov <panfilov.artyom@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Make RTC_DRV_HID_SENSOR_TIME depend on IIO and HID_SENSOR_HUB to remove
possible circular dependencies as this is the only symbol selecting those.
Suggested-by: NFlorian Lohoff <f@zz.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Add a driver for the MicroCrystal RV-3028. It is a SMT Real-Time Clock
Module that incorporates an integrated CMOS circuit together with an XTAL.
It has an i2c interface.

The driver handles date/time, alarms, trickle charging, timestamping,
frequency offset correction, EEPROM and NVRAM.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Add support for the RTC block on the 32-bit Amlogic Meson6, Meson8,
Meson8b and Meson8m2 SoCs.

The RTC is split in to two parts, which are both managed by this driver:
- the AHB front end
- and a simple serial connection to the actual registers

The RTC_COUNTER register which holds the time is 32-bits wide.

There are four 32-bit wide (in total: 16 bytes) "regmem" registers which
are exposed using nvmem. On Amlogic's 3.10 kernel this is used to store
data which needs to survive a suspend / resume cycle.
Signed-off-by: NBen Dooks <ben.dooks@codethink.co.uk>
[resurrected Ben's patches after 2 years]
Signed-off-by: NMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Fix the following build issue:

drivers/rtc/rtc-imx-sc.o: In function `imx_sc_rtc_set_time':
>> rtc-imx-sc.c:(.text+0x212): undefined reference to `__arm_smccc_smc'

Fixes: 13a929f3 ("rtc: imx-sc: add rtc set time support")
Reviewed-by: NAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

This patch adds a driver for Cadence RTC controller.

It can be enabled with RTC_DRV_CADENCE Kconfig option.
It supports waking system from sleep modes.
Signed-off-by: NJan Kotas <jank@cadence.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The sd3078 is a combination RTC and SRAM device with I2C interface.
Signed-off-by: Dianlong Li <long17.cool@163.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

i.MX8QXP is an ARMv8 SoC which has a Cortex-M4 system controller
inside, the system controller is in charge of controlling power,
clock and secure rtc etc..

This patch adds i.MX system controller RTC driver support,
Linux kernel has to communicate with system controller via MU
(message unit) IPC to set/get RTC time and other alarm functions,
since the RTC set time needs to be done in secure EL3 mode (required
by system controller firmware) and alarm functions needs to be done
with general MU IRQ handle, these depend on other components which
are NOT ready, so this patch ONLY enables the RTC time read.
Signed-off-by: NAnson Huang <Anson.Huang@nxp.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

/proc is not the correct ABI to display debugging info. Remove
RTC_DS1685_PROC_REGS as the driver hasn't seen any real development since
it was included.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

The abx804 and abx805 chips have support for a simple watchdog
function that can trigger an external reset.
Signed-off-by: NJeremy Gebben <jgebben@sweptlaser.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

Depending on MACH_INGENIC prevent us from creating a generic kernel that
works on more than one MIPS board. Instead, we just depend on MIPS being
set.
Signed-off-by: NPaul Cercueil <paul@crapouillou.net>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>

We don't have to define an extra config symbol, IS_REACHABLE does
what we need. And having this config symbol just to save the few
bytes of hwmon support on non-DS3231 chips isn't worth it IMO
(especially as the symbol is set per default).
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>