kernel/linux.git/drivers/rtc/rtc-isl1208.c, branch v5.10.257

rtc: isl1208: Fix return value of nvmem callbacks

2024-08-19T03:41:01+00:00

commit 70f1ae5f0e7f44edf842444044615da7b59838c1 upstream. Read/write callbacks registered with nvmem core expect 0 to be returned on success and a negative value to be returned on failure. isl1208_nvmem_read()/isl1208_nvmem_write() currently return the number of bytes read/written on success, fix to return 0 on success and negative on failure. Fixes: c3544f6f51ed ("rtc: isl1208: Add new style nvmem support to driver") Cc: stable@vger.kernel.org Signed-off-by: Joy Chakraborty Link: https://lore.kernel.org/r/20240612080831.1227131-1-joychakr@google.com Signed-off-by: Alexandre Belloni Signed-off-by: Greg Kroah-Hartman

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 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 as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

rtc: isl1208: Add new style nvmem support to driver

2019-02-17T20:29:10+00:00

Add support for the RTC's NVRAM using the standard nvmem support that is part of the Linux RTC framework. This driver already has a sysfs attribute that provides access to the RTC's NVRAM as a single 16-bit value. Some chips have more than two bytes of NVRAM, so this will not work for them. It's also non-standard. This sysfs attribute is left in for backward compatibility, but will only be able to read the first two bytes of NVRAM. The nvmem interface will allow access to all NVRAM, e.g. eight bytes on the isl1218. Cc: Alessandro Zummo Cc: Alexandre Belloni Signed-off-by: Trent Piepho Signed-off-by: Alexandre Belloni

rtc: isl1208: Support more chip variations

2019-02-17T20:29:10+00:00

Add more support in the driver for dealing with differences in is1208 compatible chips. Put the 1208, 1209, 1218, and 1219 in the list and encode information about nvram size, tamper, and timestamp features. This adds support for the isl1209, which has a tamper detect but no timestamp feature. Cc: Alessandro Zummo Cc: Alexandre Belloni Signed-off-by: Trent Piepho Signed-off-by: Alexandre Belloni

rtc: isl1208: Introduce driver state struct

2019-02-17T20:29:10+00:00

This driver has no state of its own, depending entirely on what is in the generic rtc device. Intoduce a state struct. For now it only contains a pointer to the rtc device struct, but future patches will add more data. Cc: Alessandro Zummo Cc: Alexandre Belloni Signed-off-by: Trent Piepho Signed-off-by: Alexandre Belloni

rtc: isl1208: fix negative digital trim reporting

2019-01-10T21:27:06+00:00

isl1208_i2c_get_dtr() was returning the dtr value directly, but could also return a negative error code. Negative trimming values, e.g. -20, would get interpreted as an error code, e.g. -ENOTDIR. This patch offsets the dtr value by 100 so it's positive and won't alias an error code. Also fix check that considered a return value of -1 to be success. Cc: Alessandro Zummo Cc: Alexandre Belloni Signed-off-by: Trent Piepho Signed-off-by: Alexandre Belloni

rtc: isl1208: Use i2c block read/write routines

2018-11-22T17:11:37+00:00

The Linux i2c layer has functions to execute common SMBUS/I2C transactions. The register access code here is identical to the I2C read/write block data routines. Cc: Alessandro Zummo Cc: Alexandre Belloni Signed-off-by: Trent Piepho Signed-off-by: Alexandre Belloni

rtc: isl1208: don't include core header file

2018-09-28T12:20:59+00:00

The core header file is reserved for the core, stop including it. Also reorder includes alphabetically. Signed-off-by: Alexandre Belloni

rtc: isl1208: avoid possible sysfs race

2018-09-28T12:14:38+00:00

Use rtc_add_group to add the common sysfs group to avoid a possible race condition. [Denis.Osterland@diehl.com: use to_i2c_client(dev->parent)] Signed-off-by: Denis Osterland Signed-off-by: Alexandre Belloni The move of atrim, dtrim usr sysfs properties from i2c device to rtc device require to access them via dev->parent. This patch also aligns timestamp0.

rtc: isl1208: set ev-evienb bit from device tree

2018-08-14T21:22:27+00:00

Add support to disable event in pull-up. Signed-off-by: Denis Osterland Signed-off-by: Alexandre Belloni