This adds support for EPSON TOYOCOM RTC-7301SF/DG which has parallel
interface compatible with SRAM.

This driver supports basic clock, calendar and alarm functionality.

Tested with Microblaze linux running on Artix7 FPGA board with my own
custom IP for RTC-7301.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Since there are no platform based users and all users
of this code are TI OMAP-based which is DT only, it makes
sense to remove unused code.
Signed-off-by: NNicolae Rosia <Nicolae_Rosia@mentor.com>
Tested-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

s/buillt/built/g
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Since the driver is now calling machine_halt() that is not exported, it has
to be built in the kernel. Building it as a module will fail at linking
time.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

max8907, max77686 and s5m RTC drivers can be compile tested to increase
build coverage.  The s5m-rtc uses REGMAP_IRQ so add this as explicit
dependency.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The RTC unit present in the JZ4780 works mostly the same as the one in
the JZ4740. The major difference is that register writes need to be
explicitly enabled, by writing a magic code (0xA55A) to a "write
enable" register before each access.
Signed-off-by: NPaul Cercueil <paul@crapouillou.net>
Acked-by: NMaarten ter Huurne <maarten@treewalker.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

That header has been gone for a while.  I've fixed up the Kconfig
comment, but the one in rtc-cmos.c doesn't make any sense to me
even looking at its history.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

This patch changes calls of spi read write calls to register map
read and write calls in rtc ds1347
Signed-off-by: NRaghavendra Chandra Ganiga <ravi23ganiga@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Support configuration of ext_wakeup sources. This patch makes it
possible to enable ext_wakeup and set it's polarity, depending on board
configuration. AM335x's dedicated PMIC (tps65217) uses ext_wakeup to
notify about power-button presses. Handling power-button presses enables
to recover from RTC-only power states correctly.
Signed-off-by: NMarcin Niestroj <m.niestroj@grinn-global.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The rtc-asm9260 driver compiles correctly on other architectures, add
COMPILE_TEST to improve code coverage.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The Intersil isl12057 is now supported by the ds1307 driver.
Acked-by: NArnaud Ebalard <arno@natisbad.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Intersil ISL12057 is a drop-in replacement for DS1337. It can be supported
by the ds1307 driver.
Acked-by: NArnaud Ebalard <arno@natisbad.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Add an option to properly support the century bit of ds1337 and compatibles
and ds1340.
Because the driver had a bug until now, it is not possible to switch users
to the fixed code directly as RTCs in the field will wrongly have the
century bit set.
Acked-by: NArnaud Ebalard <arno@natisbad.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The RK808 and RK818 PMICs are using a similar register map.
We can reuse the rtc driver for the RK818 PMIC. So let's add
the RK818 in the Kconfig description.
Signed-off-by: NWadim Egorov <w.egorov@phytec.de>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

X-Powers AC100 is a codec / RTC combo chip. This driver supports
the RTC sub-device.

The RTC block also has clock outputs and non-volatile storage.
Non-volatile storage wthin the RTC hardware is not supported.
Clock output support is added in the next patch.
Signed-off-by: NChen-Yu Tsai <wens@csie.org>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

This driver supports the Epson RX8900, but this was not indicated in
Kconfig.
Signed-off-by: NBenoît Thébaudeau <benoit@wsystem.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The mc146818_get_time/mc146818_set_time functions are rather large
inline functions in a global header file and are used in several
drivers and in x86 specific code.

Here we move them into a separate .c file that is compiled whenever
any of the users require it. This also lets us remove the linux/acpi.h
header inclusion from mc146818rtc.h, which in turn avoids some
warnings about duplicate definition of the TRUE/FALSE macros.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

nn10300 has a dependency on mc146818_get_time/mc146818_set_time,
which we want to move from the mc146818rtc.h header into the
rtc subsystem, which in turn is not usable on mn10300.

This changes mn10300 to use the modern rtc-cmos driver instead
of the old RTC driver, and that in turn lets us completely
remove the read_persistent_clock/update_persistent_clock callbacks.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Add support for Maxim max6916 RTC.
Signed-off-by: NVenkat Prashanth B U <venkat.prashanth2498@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Add support of Microcrystal RV3049 RTC (SPI) using regmap on the
RV3029 (I2C) driver.
Signed-off-by: NMylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

DS1302 is an half-duplex SPI device. The driver respects this fact now.
Pin configurations should be implemented using SPI subsystem.
Signed-off-by: NSergei Ianovich <ynvich@gmail.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

rv3029c2 is actually rv3029. c2 denotes an option.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

pcf2127 has selectable I2C-bus and SPI-bus interface support.

This adds support for SPI interface.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

This adds support to
- enable/disable the thermometer
- set the temperature scanning interval
- read the current temperature that is used for temp compensation.
via hwmon interface
Signed-off-by: NMichael Buesch <m@bues.ch>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

According to "Feature Comparison of the DS323x Real-Time Clocks"
(http://pdfserv.maximintegrated.com/en/an/AN5143.pdf), DS3232 and
DS3234 are very similar.

This merges rtc-ds3232 and rtc-ds3234 with using regmap.
This change also enables to support alarm for ds3234.
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Suggested-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The pxa section is indented using spaces, use tabs.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

There are several arch-specific RTC drivers that can be successfully
compiled on other platforms. Add a COMPILE_TEST dependency for those.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>

Always show there is an I2C section, like the other sections.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Maxim Semiconductor's PMIC MAX77686 has RTC IP which is
reused in the MAX77620/MAX20024 PMICs.

Add support for these devices in MAX77686 RTC driver. This
device does not have RTC alarm pending status outside of
RTC IP. The RTC IP is having separate I2C address for its
register access.
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The Kconfig option for rv3029 is not mentioning any part number, explicitly
show rv3029.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The RTC entries are mostly grouped by vendor. Move the few outliers in
place.
Also, change the one occurrence of 'nxp' to 'NXP' to make all NXP
entries consistent.
Signed-off-by: NSoren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

This driver adds support for the PIC32 real time clock and calendar
peripheral:
	- reading and setting time
	- alarms provided by dedicated IRQ
Signed-off-by: NJoshua Henderson <joshua.henderson@microchip.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Add support for RTC controller found on Alphascale asm9260
SoC.
Signed-off-by: NOleksij Rempel <linux@rempel-privat.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

At the moment the "sun6i" RTC drivers depends on having two specific
SoC families selected.
The Allwinner A64 SoC has the same RTC, so extend the Kconfig option
to allow inclusion of the driver for all Allwinner SoCs.
Signed-off-by: NAndre Przywara <andre.przywara@arm.com>
Acked-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The RX6110 comes in two different variants: SPI and I2C.
This driver only supports the SPI variant.

If the need ever arises to also support the I2C variant, this driver
could easily be refactored to support both cases.
Reviewed-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: NSteffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

DS3231 has the temperature registers with a resolution of 0.25
degree celsius.  This enables to get the value through hwmon.

	# cat /sys/class/i2c-adapter/i2c-2/2-0068/hwmon/hwmon0/temp1_input
	21000
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The mt6397 RTC driver can be built either when the MFD_MT6397 driver
is enabled (which selects IRQ_DOMAIN), or when compile testing.
The latter however fails without IRQ domains:

drivers/rtc/rtc-mt6397.c: In function 'mtk_rtc_probe':
drivers/rtc/rtc-mt6397.c:326:13: error: implicit declaration of function 'irq_create_mapping' [-Werror=implicit-function-declaration]
  rtc->irq = irq_create_mapping(mt6397_chip->irq_domain, res->start);

This adds an explicit dependency for the COMPILE_TEST case.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NEddie Huang <eddie.huang@mediatek.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The max77686 RTC driver now supports the max77802 RTC as
well so there's no need to have a separate driver anymore.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: NLaxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: NAndi Shyti <andi.shyti@samsung.com>
Tested-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

This driver supports the following functions:
 - reading and setting time
 - alarms when connected to an IRQ
 - reading and clearing the voltage low flags

Datasheet:
http://www.epsondevice.com/docs/qd/en/DownloadServlet?id=ID000956Signed-off-by: NAkshay Bhat <akshay.bhat@timesys.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

This driver supports the following functions:
 - reading and settings time
 - alarms when connected to an IRQ
 - reading and clearing the voltage low flags
 - nvram
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>