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path: root/drivers/rtc/rtc-pcf85063.c
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2016-11-05rtc: pcf85063: do not register a RTC device if chip is not presentMirza Krak1-0/+7
Add a sanity check to see if chip is present. If we can not communicate with the chip there is no point in registering a RTC device. Signed-off-by: Mirza Krak <mirza.krak@hostmobility.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-19rtc: pcf85063: Add support for the PCF85063A deviceChris DeBruin1-9/+38
The current rtc-pcf85063 driver only supports the PCF85063TP device. Using the existing driver on a PCF85063A will result in the time being set correctly into the RTC, but the RTC is held in the stopped state. Therefore, the time will no longer advance and no error is indicated. The PCF85063A device has a bigger memory map than the PCF85063TP. The existing driver make use of an address rollover condition, but the rollover point is different in the two devices. Signed-off-by: Chris DeBruin <cdeb5783@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-07-19rtc: pcf85063: fix year rangeAlexandre Belloni1-7/+5
The year range is not validated properly As the driver has been mainlined in 2014, it is not an issue to stop handling dates between 1970 and 2000 with the benefit of handling dates up to 2100. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-14rtc: pcf85063: remove struct pcf85063Alexandre Belloni1-17/+5
No members of struct pcf85063 are used anymore, remove the whole structure. Reviewed-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-14rtc: pcf85063: remove useless DRV_VERSIONAlexandre Belloni1-5/+0
Since the driver is mainlined there is no use for a separate version number. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-14rtc: pcf85063: remove useless century handlingAlexandre Belloni1-7/+0
pcf85063_get_datetime() tries to handle a century bit but that bit is not documented and the final value is never used anywhere else in the kernel. Reviewed-by: Juergen Borleis <jbe@pengutronix.de> Tested-by: Ulrich Ölmann <u.oelmann@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-14rtc: pcf85063: fix time/date settingJuergen Borleis1-23/+55
When setting a new time/date the RTC's clock must be stopped first, in order to write the time/date registers in an atomic manner. So, this change stops the clock first and then writes the time/date registers and the clock control register (to re-enable the clock) in one turn. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-14rtc: pcf85063: fix time/date readingJuergen Borleis1-0/+7
Check if the RTC signals an invalid time/date (due to a battery power loss for example). In this case ignore the time/date until it is really set again. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2016-03-14rtc: pcf85063: simplify code to read the current timeJuergen Borleis1-26/+21
By using i2c_smbus_read_i2c_block_data() the code is now much simpler. While at it: when reading the RTC's seconds register, all time/date registers are frozen until the RTC's year register is read. So it is important to read all time/date registers in one turn to not lose a second event. Make it more clear why the read must happen in this way. Signed-off-by: Juergen Borleis <jbe@pengutronix.de> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-11-08rtc: pcf85063: return an error when date is invalidAlexandre Belloni1-7/+1
Return an error when the date is invalid as the policy should be implemented there. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2015-09-05rtc: Drop owner assignment from i2c_driverKrzysztof Kozlowski1-1/+0
i2c_driver does not need to set an owner because i2c_register_driver() will set it. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
2014-08-09rtc: add pcf85063 supportSøren Andersen1-0/+204
Add support for the pcf85063 rtc chip. [akpm@linux-foundation.org: fix comment typo, tweak conding style] Signed-off-by: Soeren Andersen <san@rosetechnology.dk> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>