kernel/git/next/linux-next.git/drivers/rtc/Makefile, branch akpm

rtc: Introduce ti-k3-rtc

2022-06-24T19:35:31+00:00

Introduce support for Texas Instruments Real Time Clock controller on newer K3 family of SoCs such as AM62x. The hardware module that is being supported is the "digital only" version which doesn't have capability of external wakeup sources and external power backup. However, for many practical applications, this should suffice as RTC is operational across low power sequences. The hardware block by itself is split into two distinct domains internally to further reduce the power consumption with the actual counter block and comparators clocked off a 32k clock source (which based on SoC integration can be sourced by an external crystal) and an register interface block which is driven by the bus clock. While optimal from power perspective, it does create some complicated synchronizations and sequences that one must be wary of in the driver handling. Acked-by: Andrew Davis Signed-off-by: Nishanth Menon Tested-by: Georgi Vlaev Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20220623170808.20998-3-nm@ti.com

rtc: Add driver for Microchip PolarFire SoC

2022-06-24T19:24:02+00:00

Add support for the built-in RTC on Microchip PolarFire SoC Co-Developed-by: Daire McNamara Signed-off-by: Daire McNamara Signed-off-by: Conor Dooley Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20220601123320.2861043-2-conor.dooley@microchip.com

rtc: rzn1: Add new RTC driver

2022-05-17T21:11:44+00:00

Add a basic RTC driver for the RZ/N1. Signed-off-by: Michel Pollet Co-developed-by: Miquel Raynal Signed-off-by: Miquel Raynal Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20220516082504.33913-3-miquel.raynal@bootlin.com

rtc: optee: add RTC driver for OP-TEE RTC PTA

2022-03-25T10:42:50+00:00

This drivers allows to communicate with a RTC PTA handled by OP-TEE [1]. This PTA allows to query RTC information, set/get time and set/get offset depending on the supported features. [1] https://github.com/OP-TEE/optee_os/pull/5179 Signed-off-by: Clément Léger Reviewed-by: Jens Wiklander Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20220308133505.471601-1-clement.leger@bootlin.com

rtc: Add driver for RTC in Sunplus SP7021

2022-01-05T00:00:29+00:00

Add driver for RTC in Sunplus SP7021 Signed-off-by: Vincent Shih Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/1638517579-10316-2-git-send-email-vincent.sunplus@gamil.com

rtc: gamecube: Add a RTC driver for the GameCube, Wii and Wii U

2021-12-16T09:46:35+00:00

These three consoles share a device, the MX23L4005, which contains a clock and 64 bytes of SRAM storage, and is exposed on the EXI bus (similar to SPI) on channel 0, device 1. This driver allows it to be used as a Linux RTC device, where time can be read and set. The hardware also exposes two timers, one which shuts down the console and one which powers it on, but these aren’t supported currently. On the Wii U, the counter bias is stored in a XML file, /config/rtc.xml, encrypted in the SLC (eMMC storage), using a proprietary filesystem. In order to avoid having to implement all that, this driver assumes a bootloader will parse this XML file and write the bias into the SRAM, at the same location the other two consoles have it. Signed-off-by: Emmanuel Gil Peyrot Acked-by: Michael Ellerman (powerpc) Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20211215175501.6761-2-linkmauve@linkmauve.fr

rtc: tps80031: Remove driver

2021-10-23T21:52:48+00:00

Driver was upstreamed in 2013 and never got a user, remove it. Signed-off-by: Dmitry Osipenko Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20211021192258.21968-2-digetx@gmail.com

rtc: Add support for the MSTAR MSC313 RTC

2021-09-25T22:17:25+00:00

This adds support for the RTC block on the Mstar MSC313e SoCs and newer. Signed-off-by: Daniel Palmer Co-developed-by: Romain Perier Signed-off-by: Romain Perier Reviewed-by: Nobuhiro Iwamatsu Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20210823171613.18941-3-romain.perier@gmail.com

rtc: move RTC_LIB_KUNIT_TEST to proper location

2021-08-10T21:22:20+00:00

Move RTC_LIB_KUNIT_TEST under RTC_LIB so it is clear in the menu this is part of the RTC subsystem. Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20210810212008.631359-2-alexandre.belloni@bootlin.com

rtc: Improve performance of rtc_time64_to_tm(). Add tests.

2021-08-09T22:09:21+00:00

The current implementation of rtc_time64_to_tm() contains unnecessary loops, branches and look-up tables. The new one uses an arithmetic-based algorithm appeared in [1] and is approximately 4.3 times faster (YMMV). The drawback is that the new code isn't intuitive and contains many 'magic numbers' (not unusual for this type of algorithm). However, [1] justifies all those numbers and, given this function's history, the code is unlikely to need much maintenance, if any at all. Add a KUnit test case that checks every day in a 160,000 years interval starting on 1970-01-01 against the expected result. Add a new config RTC_LIB_KUNIT_TEST symbol to give the option to run this test suite. [1] Neri, Schneider, "Euclidean Affine Functions and Applications to Calendar Algorithms". https://arxiv.org/abs/2102.06959 Signed-off-by: Cassio Neri Reported-by: kernel test robot Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20210624201343.85441-1-cassio.neri@gmail.com