linux-toradex.git/drivers/rtc/rtc-isl1208.c, branch v5.5

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

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

2018-08-14T21:03:19+00:00

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