Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.6.131 2022-03-23T18:58:40+00:00 2022-03-23T18:58:40+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2022-03-09T16:22:53+00:00 urn:sha1:e99653afeb9585350644c5ae4b0ca987cbe8d053 Some RTCs have an IRQ pin that is not connected to a CPU interrupt but rather directly to a PMIC or power supply. In that case, it is still useful to be able to set alarms but we shouldn't expect interrupts. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20220309162301.61679-22-alexandre.belloni@bootlin.com 2021-10-18T15:20:50+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2021-10-18T15:19:31+00:00 urn:sha1:0d20e9fb1262b1f9ac895b287db892bc75b05b84 BSM or Backup Switch Mode is a common feature on RTCs, allowing to select how the RTC will decide when to switch from its primary power supply to the backup power supply. It is necessary to be able to set it from userspace as there are uses cases where it has to be done dynamically. Supported values are: RTC_BSM_DISABLED: disabled RTC_BSM_DIRECT: switching will happen as soon as Vbackup > Vdd RTC_BSM_LEVEL: switching will happen around a threshold, usually with an hysteresis RTC_BSM_STANDBY: switching will not happen until Vdd > Vbackup, this is useful to ensure the RTC doesn't draw any power until the device is first powered on. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20211018151933.76865-6-alexandre.belloni@bootlin.com 2021-10-18T15:20:50+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2021-10-18T15:19:30+00:00 urn:sha1:a6d8c6e1a5c6fb982964861dc84c0c7cb0151c7c Add a new parameter allowing the get and set the correction using ioctls instead of just sysfs. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20211018151933.76865-5-alexandre.belloni@bootlin.com 2021-10-18T15:20:50+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2021-10-18T15:19:29+00:00 urn:sha1:2268551935dbf1abcbb4d4fb7b1ad74dbe0d1be0 Add a new feature for RTCs able to correct the oscillator imprecision. This is also called offset or trimming. Such drivers have a .set_offset callback, use that to set the feature bit from the core. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20211018151933.76865-4-alexandre.belloni@bootlin.com 2021-10-18T15:20:50+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2021-10-18T15:19:28+00:00 urn:sha1:6a8af1b6568ad9ee08a419fb12c793f7992cf8a4 Add an ioctl allowing to get and set extra parameters for an RTC. For now, only handle getting available features. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20211018151933.76865-3-alexandre.belloni@bootlin.com 2021-10-18T15:20:50+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2021-10-18T15:19:27+00:00 urn:sha1:917425f71f36ce6f61841497040e10d0166106d8 Add more alarm related features to be declared by drivers. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20211018151933.76865-2-alexandre.belloni@bootlin.com 2021-01-16T22:19:26+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2021-01-10T23:17:36+00:00 urn:sha1:7ae41220ef5831674f446baef19bfe1b31358260 Introduce a bitfield to allow the drivers to announce the available features for an RTC. The main use case would be to better handle alarms, that could be present or not or have a minute resolution or may need a correct week day to be set. Use the newly introduced RTC_FEATURE_ALARM bit to then test whether alarms are available instead of relying on the presence of ops->set_alarm. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Link: https://lore.kernel.org/r/20210110231752.1418816-2-alexandre.belloni@bootlin.com 2020-05-11T14:04:35+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2020-05-05T20:13:06+00:00 urn:sha1:734e5e4e268f792d514ec2313792f30ec5f6c94f A new flag RTC_VL_BACKUP_SWITCH means that a backup switchover happened since last flag clear. Link: https://lore.kernel.org/r/20200505201310.255145-1-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 2020-03-26T20:38:40+00:00 Eugene Syromiatnikov esyr@redhat.com 2020-03-24T04:12:09+00:00 urn:sha1:b0efe0281234e60c7c4f5fa812712fca50bec1b7 BIT() macro is not defined in UAPI headers; there is, however, similarly defined _BITUL() macro present in include/uapi/linux/const.h; use it instead and include <linux/const.h> and <linux/ioctl.h> in order to make the definitions provided in the header useful. Fixes: 3431ca4837bf ("rtc: define RTC_VL_READ values") Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com> Link: https://lore.kernel.org/r/20200324041209.GA30727@asgard.redhat.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> 2019-12-18T09:37:18+00:00 Alexandre Belloni alexandre.belloni@bootlin.com 2019-12-14T22:02:43+00:00 urn:sha1:3431ca4837bf7f2b816e4c439db5bb66e7586746 Currently, the meaning of the value returned by RTC_VL_READ is undocumented and left to the driver implementation. In order to get more meaningful values, define a set of values to use as to make clear to userspace what is the status of the various voltages feeding the RTC. Link: https://lore.kernel.org/r/20191214220259.621996-2-alexandre.belloni@bootlin.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>