Sometimes the irq line is not connected to any soc-pin. This does
not hinder basic timekeeping functionality of the rtc, so probe
should not fail in this case.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Use resource_size function on resource object instead of explicit
computation.

No need to set .owner here. The core will do it.
Remove .owner field if calls are used which set it automatically
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Acked-by: NHans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The driver can't accommodate the 12 hour mode but the error message states
that the 24 hour mode is not supported.
Also fix the typos (hour vs hours).
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Use bit instead of hand coding the shift and correct the 24 hour vs 24
hours typo.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The rtc-efi driver declares that the EFI 'epoch' is 1/1/1998, but
the UEFI spec does not define it at all. It does define a range of
[1900, 9999] for the 'Year' member of the EFI_TIME struct, so let's
use 1900 as the minimum year and not 1998.
Also, move the validation of the year to the convert_from_efi_time()
routine where all other EFI_TIME fields are validated as well.

This prevents rtc_read_time() failures when the RTC that backs the
EFI time services is set to a date before 1998, e.g., when it has
lost power.

This also optimizes the compute_wday() routine, by replacing the for
loop with a simple arithmetic expression, and by reusing the yearday
value that we need to compute anyway when populating the
rtc_time::tm_yday field.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Now rtc_set_mmss() has no users, just remove it.

We still have rtc_set_time() doing similar things.
Signed-off-by: NXunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Currently, CONFIG_RTC_SYSTOHC uses CONFIG_RTC_HCTOSYS_DEVICE which
is originally used by CONFIG_RTC_HCTOSYS, but this rtc device has
some limiations, for example, it must be battery-backed, be able
to work with irq off and through system suspension, etc.

So add CONFIG_RTC_SYSTOHC_DEVICE used exclusively for CONFIG_RTC_SYSTOHC,
it is more lenient compared to CONFIG_RTC_HCTOSYS_DEVICE, and could
be assigned any available RTC in the system.

Default value is CONFIG_RTC_HCTOSYS_DEVICE which is "rtc0" by default.
After this patch, NTP will sync up "rtc0" by default.

Cc: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: NXunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

sunxi_rtc_setalarm() uses deprecated rtc_tm_to_time(),
which will overflow in year 2106 on 32-bit machines.

This patch solves this by:
- Replacing rtc_tm_to_time() with rtc_tm_sub()

Also remove the unnecessary initial zeroing of some
local variables in sunxi_rtc_setalarm().

Cc: Carlo Caione <carlo.caione@gmail.com>
Signed-off-by: NXunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

isl1208_i2c_set_alarm() uses deprecated rtc_tm_to_time(),
which will overflow in year 2106 on 32-bit machines.

This patch solves this by:
 - Replacing rtc_tm_to_time() with rtc_tm_sub()

Cc: Herbert Valerio Riedel <hvr@gnu.org>
Signed-off-by: NXunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

pcf8563_rtc_set_alarm() uses deprecated rtc_tm_to_time()
and rtc_time_to_tm(), which will overflow in year 2106
on 32-bit machines.

This patch solves this by:
 - Replacing rtc_time_to_tm() with rtc_time64_to_tm()
 - Replacing rtc_tm_to_time() with rtc_tm_to_time64()
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NXunlei Pang <pang.xunlei@linaro.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Initialise the variable high_bb_charging before using it to avoid
configuring wrong value and fix following compilation warning:

/*
rtc-palmas.c: In function ‘palmas_rtc_probe’:
rtc-palmas.c:242:7: warning: ‘high_bb_charging’ may be used
uninitialized in this function
*/
Signed-off-by: NLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.

Move the call to platform_get_resource adjacent to the call to
devm_ioremap_resource to make the connection between them more clear.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@

- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  ... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
  ... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
  e = devm_ioremap_resource(e1, res);
// </smpl>
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
[viresh.kumar@linaro.org: acked rtc-spear]
Acked-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Return -EINVAL if the voltage low bit is set to avoid getting a bogus
time at boot.
There was a comment stating that util-linux hwclock refuses to set a
new time if we return an error code on read, but at least the current
version do set the time as expected. Remove the comment and the check
for valid time, and let the rtc core check it for us.
Signed-off-by: NJan Kardell <jan.kardell@telliq.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Driver for the on chip RTC found on Cortina's SoC Gemini.
Signed-off-by: NHans Ulli Kroll <ulli.kroll@googlemail.com>
[alexandre.belloni@free-electrons.com: use devm_request_irq() and remove
useless goto]
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

rtc-stmp3xxx depends on lib/stmp_device, select it.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

When entering suspend while an wakeup alarm is set, enable_set_wake
should make sure that the RTC interrupt keep being enabled and the
.irq_set_wake for the RTC interrupt get called. However, since the
driver uses the suspend_noirq callback, the call to enable_irq_wake
has been made after disabling the interrupts. While .irq_set_wake
has been called properly, the interrupt remained disabled.

Use the suspend callback to call enable_irq_wake early enough to
ensure the RTC interrupt remains enabled.

Fixes: 7654e9d4 ("drivers/rtc/rtc-snvs: fix suspend/resume")
Cc:  <stable@vger.kernel.org> # 3.19
Signed-off-by: NStefan Agner <stefan@agner.ch>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Using gpio_request_array()/gpio_free_array() can make the code
simpler because it can set the direction and initial value
in one shot and the for loop is unnecessary.

Also, struct v3020_gpio is removed, because the struct v3020_gpio
is replaced with struct gpio.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Drivers should not be using the __raw_* io accessors.
Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

If the rtc-max77802 driver is built as a module, modalias information is
not filled so the module is not autoloaded. Use the MODULE_DEVICE_TABLE()
macro to export the platform ID table so the module contains that data.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

If the rtc-max77686 driver is built as a module, modalias information is
not filled so the module is not autoloaded. Use the MODULE_DEVICE_TABLE()
macro to export the platform ID table so the module contains that data.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The device table is required to load modules based on modaliases.
After adding MODULE_DEVICE_TABLE, below entries will be added to
modules.alias:

alias i2c:ds1672 rtc_ds1672
alias i2c:max6900 rtc_max6900
alias platform:lp3974-rtc rtc_max8998
alias platform:max8998-rtc rtc_max8998
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Dale Farnsworth <dale@farnsworth.org>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

On some !ARM 32bits platforms, the following compilation error happens
because of the division on a 64bits value in mtk_rtc_read_time():

drivers/built-in.o: In function `mtk_rtc_read_time':
rtc-mt6397.c:(.text+0x265d13f): undefined reference to `__divdi3'
rtc-mt6397.c:(.text+0x265d150): undefined reference to `__moddi3'

Use div_s64() as done in rtc_time64_to_tm() to solve that.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Acked-by: NEddie Huang <eddie.huang@mediatek.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

According to C99, %2.s means 'print two spaces' (a precision of
. without following digits or * means 0). The kernel's printf
implementation, however, treats that case as if no precision was
given, but relying on that quirk is rather silly. Also, since no -
(aka left-justify) flag is given, the field with of 2 would then cause
the alarm->enabled case to come out as "o n". Deobfuscate it.
Signed-off-by: NRasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Add Mediatek MT6397 RTC driver
Signed-off-by: NTianping Fang <tianping.fang@mediatek.com>
Signed-off-by: NEddie Huang <eddie.huang@mediatek.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The rtc-xgene driver is only useful on X-Gene SoC.
Signed-off-by: NJean Delvare <jdelvare@suse.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Iyappan Subramanian <isubramanian@apm.com>
Cc: Keyur Chudgar <kchudgar@apm.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

This patch updates the email address of the rtc-at32ap700x driver supported by
me to an email account I will use on a more regular basis in the future.
Signed-off-by: NHans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

If the DryICE unit is locked it is impossible to set the time. Provide an
error message for this case.
Signed-off-by: NJuergen Borleis <jbe@pengutronix.de>
Signed-off-by: NRobert Schwebel <rsc@pengutronix.de>
[rsc: got NDA clearance from Freescale]
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Maybe the unit enters the hardware related state at runtime and not at
system boot time (after a power cycle).
Signed-off-by: NJuergen Borleis <jbe@pengutronix.de>
Signed-off-by: NRobert Schwebel <rsc@pengutronix.de>
[rsc: got NDA clearance from Freescale]
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

This code is required to recover the unit from a security violation.
Hopefully this code can recover the unit from a hardware related invalid
state as well.
Signed-off-by: NJuergen Borleis <jbe@pengutronix.de>
Signed-off-by: NRobert Schwebel <rsc@pengutronix.de>
[rsc: got NDA clearance from Freescale]
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Document the i.MX DryIce machine states.
Signed-off-by: NJuergen Borleis <jbe@pengutronix.de>
Signed-off-by: NRobert Schwebel <rsc@pengutronix.de>
[rsc: got NDA clearance from Freescale]
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Be independent of the endianness of the kernel.
Signed-off-by: NJuergen Borleis <jbe@pengutronix.de>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

There are now no differences between RTC on Exynos3250 and S3C6410.
Merge everything into one so duplicated code could be removed.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: NChanwoo Choi <cw00.choi@samsung.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Reviewed-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The rtc_timer_cancel() always returns 0 and cannot fail (calls only
other void-returning functions).
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The platform_device_id is not modified by the driver and core uses it as
const.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The platform_device_id is not modified by the driver and core uses it as
const.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

The platform_device_id is not modified by the driver and core uses it as
const.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

I'm no longer employed by HP.
Signed-off-by: Ndann frazier <dannf@dannf.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>

Reported-by: NFengguang Wu <fengguang.wu@gmail.com>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

While setting the time, the RTC TIME register should not be accessed.
However due to hardware constraints, setting the RTC time involves
sleeping during 100ms.  This sleep was done outside the critical section
protected by the spinlock, so it was possible to read the RTC TIME
register and get an incorrect value.  This patch introduces a mutex for
protecting the RTC TIME access, unlike the spinlock it is allowed to
sleep in a critical section protected by a mutex.

The RTC STATUS register can still be used from the interrupt handler but
it has no effect on setting the time.
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: NAndrew Lunn <andrew@lunn.ch>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: <stable@vger.kernel.org>	[4.0]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This is a basic driver for the ultra-low-power Abracon AB x80x series of RTC
chips. It supports in particular, the supersets AB0805 and AB1805.
It allows reading and writing the time, and enables the supercapacitor/
battery charger.

[arnd@arndb.de: abx805 depends on i2c]
[alexandre.belloni@free-electrons.com: renam buffer from date to buf in abx80x_rtc_read_time()]
Signed-off-by: NPhilippe De Muyter <phdm@macqel.be>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>