kernel/drivers/rtc/rtc-pcf8523.c, branch linux-4.16.y

rtc: pcf8523: add support for trimming the RTC oscillator

2017-10-25T21:05:52Z

Add support for reading and writing the RTC offset register, converting it to the corresponding parts-per-billion value. When setting the drift, the PCF8523 has two modes: one applies the adjustment every two hours, the other applies the adjustment every minute. We select between these two modes according to which ever gives the closest PPB value to the one requested. Signed-off-by: Russell King Signed-off-by: Alexandre Belloni

rtc: pcf8523: properly handle oscillator stop bit

2016-03-14T16:08:30Z

The time and date register of the pcf8223 are undefined after a power reset. Properly handle the OS bit and return -EINVAL when that bit is set. It is properly removed when setting the time. This solves an issue where the time and date may be valid for rtc_valid_tm() but is not the current time. Signed-off-by: Alexandre Belloni

rtc: pcf8523: refuse to write dates later than 2099

2016-01-11T19:19:54Z

When the chip increments the YEAR register and it already holds bin2bcd(99) it reads as 0 afterwards. With this behaviour the last valid day (without trickery) that has a representation is 2099-12-31 23:59:59. So refuse to write later dates. Signed-off-by: Uwe Kleine-König Signed-off-by: Alexandre Belloni

rtc: Drop owner assignment from i2c_driver

2015-09-05T11:19:06Z

i2c_driver does not need to set an owner because i2c_register_driver() will set it. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Alexandre Belloni

drivers/rtc/rtc-pcf8523.c: fix month definition

2014-05-06T20:04:58Z

PCF8523 uses 1-12 to represent month according to datasheet. link: www.nxp.com/documents/data_sheet/PCF8523.pdf. Signed-off-by: Chris Cui Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

drivers/rtc/rtc-pcf8523.c: remove empty function

2013-07-03T23:07:57Z

After the switch to devm_* functions and the removal of rtc_device_unregister(), the 'remove' function does not do anything. Delete it. Signed-off-by: Sachin Kamat Acked-by: Thierry Reding Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc: rtc-pcf8523: use devm_rtc_device_register()

2013-04-30T01:28:26Z

devm_rtc_device_register() is device managed and makes cleanup paths simpler. Signed-off-by: Jingoo Han Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc-pcf8523: add low battery voltage support

2013-02-22T01:22:27Z

Implement reading of the battery voltage low signal for rtc-pcf8523. The bit is read-only and cannot be cleared by software, so no clear function is implemented. [akpm@linux-foundation.org: omit pcf8563_rtc_ioctl() if CONFIG_RTC_INTF_DEV=n] Signed-off-by: Jesper Nilsson Reviewed-by: Thierry Reding Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rtc: add NXP PCF8523 support

2012-12-18T01:15:21Z

Add an RTC driver for PCF8523 chips by NXP Semiconductors. No support is currently provided for the alarm and interrupt functions. Only the time and date functionality is implemented. Signed-off-by: Thierry Reding Cc: Alessandro Zummo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds