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Author SHA1 Message Date
Linus Torvalds 28e8c4bc8e Merge tag 'rtc-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux 
Pull RTC updates from Alexandre Belloni:
 "Subsystem:
   - new %ptR printk format
   - rename core files
   - allow registration of multiple nvmem devices

  New driver:
   - i.MX system controller RTC

  Driver updates:
   - abx80x: handle voltage ioctls, correct binding doc
   - m41t80: correct month in alarm reads
   - pcf85363: add pcf85263 support
   - pcf8523: properly handle battery low flag
   - s3c: limit alarm to one year in the future as ALMYEAR is broken
   - sun6i: rework clock output binding"

* tag 'rtc-4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (54 commits)
  rtc: rename core files
  rtc: nvmem: fix possible use after free
  rtc: add i.MX system controller RTC support
  dt-bindings: fsl: scu: add rtc binding
  rtc: pcf2123: Add Microcrystal rv2123
  rtc: class: reimplement devm_rtc_device_register
  rtc: enforce rtc_timer_init private_data type
  rtc: abx80x: Implement RTC_VL_READ,CLR ioctls
  rtc: pcf85363: Add support for NXP pcf85263 rtc
  dt-bindings: rtc: pcf85363: Document pcf85263 real-time clock
  rtc: pcf8523: don't return invalid date when battery is low
  dt-bindings: rtc: use a generic node name for ds1307
  PM: Switch to use %ptR
  m68k/mac: Switch to use %ptR
  Input: hp_sdc_rtc - Switch to use %ptR
  rtc: tegra: Switch to use %ptR
  rtc: s5m: Switch to use %ptR
  rtc: s3c: Switch to use %ptR
  rtc: rx8025: Switch to use %ptR
  rtc: rx6110: Switch to use %ptR
  ...
 2019-01-01 13:24:31 -08:00
Alexandre Belloni 36e14f5fdf rtc: rename core files 
Rename core files so there is a clearer separation between the RTC core and
the RTC drivers.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-31 11:36:16 +01:00
Alexandre Belloni bba3d2daa8 rtc: nvmem: fix possible use after free 
In cas of probe failure, devres may free the memory allocated for
rtc->nvram before devm_rtc_release_device() is called. This leads to
rtc_nvram_unregister using it after being freed which may lead to a crash.

This has been shown to happen after commit 461e557b97 ("rtc: nvmem: use
devm_nvmem_register()")

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-31 00:49:36 +01:00
Anson Huang e01b578195 rtc: add i.MX system controller RTC support 
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: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-20 12:47:40 +01:00
Alexandre Belloni 3c3d71013c rtc: pcf2123: Add Microcrystal rv2123 
Add a compatible string for Microcrystal rv2123 as the reset procedure seem
to be differing. However, the current driver works just fine.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-18 22:53:35 +01:00
Alexandre Belloni a269441493 rtc: class: reimplement devm_rtc_device_register 
Implement devm_rtc_device_register using devm_rtc_allocate_device and
__rtc_register_device so there is only one path left to register rtc
devices.

Also mark it as deprecated so new drivers will hopefully use
devm_rtc_allocate_device and rtc_register_device that are less race prone
and allow avoiding the 2038, 2070, 2100 and 2106 bugs properly.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-18 22:53:32 +01:00
Alexandre Belloni 9a03201170 rtc: enforce rtc_timer_init private_data type 
All the remaining users of rtc_timers are passing the rtc_device as private
data. Enforce that and rename private_data to rtc.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-18 22:53:29 +01:00
Marek Vasut ffe1c5a2d4 rtc: abx80x: Implement RTC_VL_READ,CLR ioctls 
Implement standard ioctls for polling the battery status and clearing
the battery low indication from userspace.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-18 22:53:27 +01:00
Biju Das fc979933bc rtc: pcf85363: Add support for NXP pcf85263 rtc 
Add support for NXP pcf85263 real-time clock. pcf85263 rtc is compatible
with pcf85363,except that pcf85363 has additional 64 bytes of RAM.

1 byte of nvmem is supported and exposed in sysfs (# is the instance
number,starting with 0): /sys/bus/nvmem/devices/pcf85x63-#/nvmem

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-11 00:48:17 +01:00
Baruch Siach ecb4a353d3 rtc: pcf8523: don't return invalid date when battery is low 
The RTC_VL_READ ioctl reports the low battery condition. Still,
pcf8523_rtc_read_time() happily returns invalid dates in this case.
Check the battery health on pcf8523_rtc_read_time() to avoid that.

Reported-by: Erik Čuk <erik.cuk@domel.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-11 00:46:53 +01:00
Andy Shevchenko d54fb48616 rtc: tegra: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:40:12 +01:00
Andy Shevchenko 5527842eab rtc: s5m: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:40:10 +01:00
Andy Shevchenko 9a1bacf423 rtc: s3c: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:40:08 +01:00
Andy Shevchenko 1921cab117 rtc: rx8025: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:40:07 +01:00
Andy Shevchenko a3f60bb35f rtc: rx6110: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:40:05 +01:00
Andy Shevchenko 0991e754b9 rtc: rk808: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:40:03 +01:00
Andy Shevchenko b2db0a291a rtc: puv3: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:40:01 +01:00
Andy Shevchenko 4f5ef6eec4 rtc: pm8xxx: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:59 +01:00
Andy Shevchenko 93206f9315 rtc: pic32: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:57 +01:00
Andy Shevchenko 8d2e6b22bb rtc: pcf50633: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:54 +01:00
Andy Shevchenko 1481376072 rtc: mcp795: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:52 +01:00
Andy Shevchenko ad78343e40 rtc: m48t59: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:49 +01:00
Andy Shevchenko 22b844ae33 rtc: m41t80: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:47 +01:00
Andy Shevchenko 285166cb8c rtc: at91sam9: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:44 +01:00
Andy Shevchenko d422f8835d rtc: at91rm9200: Switch to use %ptR 
Use %ptR instead of open coded variant to print content of
struct rtc_time in human readable format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
 2018-12-10 22:39:39 +01:00