kernel/drivers/rtc/rtc-isl1208.c, branch linux-5.1.y

rtc: isl1208: Add new style nvmem support to driver

2019-02-17T20:29:10Z

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

2019-02-17T20:29:10Z

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

2019-02-17T20:29:10Z

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

2019-01-10T21:27:06Z

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

2018-11-22T17:11:37Z

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

2018-09-28T12:20:59Z

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

2018-09-28T12:14:38Z

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

2018-08-14T21:22:27Z

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

rtc: isl1208: Add "evdet" interrupt source for isl1219

2018-08-14T21:03:19Z

Add support for "evdet" named interrupt source. The check if i2c client irq matches evdet irq is needed for the case that there is only one interrupt named "evdet". In this case i2c client code handles this like an unnamed interrupt souce and assigns the value. Signed-off-by: Denis Osterland Reviewed-by: Michael Grzeschik Signed-off-by: Alexandre Belloni

rtc: isl1208: add support for isl1219 with tamper detection

2018-08-14T21:00:58Z

We add support for the ISL1219 chip that got an integrated tamper detection function. This patch implements the feature by adding an additional timestamp0 file to sysfs device path. This file contains seconds since epoch, if an event occurred, or is empty, if none occurred. Signed-off-by: Michael Grzeschik Signed-off-by: Denis Osterland Signed-off-by: Alexandre Belloni