kernel/drivers/rtc/rtc-rs5c372.c, branch linux-6.1.y

i2c: Make remove callback return void

2022-08-16T10:46:26Z

The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin Reviewed-by: Jeremy Kerr Reviewed-by: Benjamin Mugnier Reviewed-by: Javier Martinez Canillas Reviewed-by: Crt Mori Reviewed-by: Heikki Krogerus Acked-by: Greg Kroah-Hartman Acked-by: Marek Behún # for leds-turris-omnia Acked-by: Andy Shevchenko Reviewed-by: Petr Machata # for mlxsw Reviewed-by: Maximilian Luz # for surface3_power Acked-by: Srinivas Pandruvada # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil # for media/* + staging/media/* Acked-by: Miguel Ojeda # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli # for versaclock5 Reviewed-by: Ajay Gupta # for ucsi_ccg Acked-by: Jonathan Cameron # for iio Acked-by: Peter Rosin # for i2c-mux-*, max9860 Acked-by: Adrien Grassein # for lontium-lt8912b Reviewed-by: Jean Delvare # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard # for IPMI Reviewed-by: Vladimir Oltean Acked-by: Dmitry Torokhov Acked-by: Sebastian Reichel # for drivers/power Acked-by: Krzysztof Hałasa Signed-off-by: Uwe Kleine-König Signed-off-by: Wolfram Sang

rtc: rs5c372: fix incorrect oscillation value on r2221tl

2022-01-04T23:52:10Z

The XSL bit only exists in RS5C372A/B. On other Ricoh RTC chips supported in rs5c372, this bit has different meaning. For example, on R2221x and R2223x, this bit of oscillation adjustment register determines the operation frequency of oscillation adjustment circuit and the oscillation is always 32768HZ. But rs5c372_get_trim gives 32000HZ to osc when DEV is 1. Signed-off-by: Camel Guo Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20211206125832.6461-1-camel.guo@axis.com

rtc: rs5c372: add offset correction support

2022-01-04T22:27:34Z

In order for linux userspace application to be able to adjust offset to keep rtc precision as high as possible, this commit adds support of offset correction by adjusting the time trimming register on rs5c372[a|b] and oscilluation adjustment register on r2025x, r222[1|3]x, rv5c38[6|7]a. Signed-off-by: Camel Guo Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20211202152252.31264-1-camel.guo@axis.com

rtc: rs5c372: Add RTC_VL_READ, RTC_VL_CLR ioctls

2021-11-30T23:05:42Z

In order to make it possible to get battery voltage status, this commit adds RTC_VL_READ, RTC_VL_CLR ioctl commands to rtc-rs5c372. Signed-off-by: Camel Guo Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20211111083625.10216-1-camel.guo@axis.com

rtc: rs5c372: quiet maybe-unused variable warning

2021-02-05T23:58:25Z

When CONFIG_OF is disabled then the matching table is not referenced. Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20210202112219.3610853-14-alexandre.belloni@bootlin.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55Z

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

rtc: rs5c372: Fix reading from rtc when the oscillator got interrupted.

2019-02-11T08:41:21Z

When the oscillator of the rtc gets interrupted, e.g. due to an empty battery, reading from the rtc will now return an error and the oscillator bit will be cleared, once the rtc is successfully reset. Signed-off-by: Oliver Rohe Signed-off-by: Alexandre Belloni

rtc: rs5c372: r2221: fix to use the correct XSTP bit

2019-02-05T22:11:31Z

The Ricoh chips have slightly different register layouts and the r2221 chip uses bit 5 as the oscillator halt sensor bit. Signed-off-by: Olive Rohe Signed-off-by: Alexandre Belloni

rtc: rs5c372: remove useless indirection

2018-03-17T13:20:45Z

rs5c372_get_datetime and rs5c372_set_datetime are only used after casting dev to an i2c_client. Remove that useless indirection. Signed-off-by: Alexandre Belloni

rtc: rs5c372: stop validating rtc_time in .read_time

2018-03-17T13:20:45Z

The RTC core is always calling rtc_valid_tm after the read_time callback. It is not necessary to call it before returning from the callback. Signed-off-by: Alexandre Belloni