linux-stable.git/drivers/rtc/rtc-ds1307.c, branch linux-3.5.y

rtc: ds1307: add trickle charger support

2012-05-29T23:22:33+00:00

Some DS13XX devices have "trickle chargers".  Its configuration register
is at different locations, the setup is the same, though.  Since the
configuration is board specific, introduce a platform_data to this driver.
Tested with a DS1339 on a custom board.

Signed-off-by: Wolfram Sang 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: ds1307: remove superfluous initialization

2012-05-29T23:22:33+00:00

ds1307 was kzalloced, so no need to zero members of the struct.

Signed-off-by: Wolfram Sang 
Acked-by: Joakim Tjernlund 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rtc/rtc-ds1307.c: fix BUG shown with lock debugging enabled

2012-04-26T04:26:34+00:00

Add struct bin_attribute initialization to fix the following bug:

rtc-ds1307 3-0068: rtc core: registered ds1307 as rtc0
BUG: key cfb14fcc not in .data!
------------[ cut here ]------------
WARNING: at kernel/lockdep.c:2986 sysfs_add_file_mode+0x84/0xdc()
Modules linked in:
[] (unwind_backtrace+0x0/0xf8) from [] (warn_slowpath_common+0x4c/0x64)
[] (warn_slowpath_common+0x4c/0x64) from [] (warn_slowpath_null+0x1c/0x24)
[] (warn_slowpath_null+0x1c/0x24) from [] (sysfs_add_file_mode+0x84/0xdc)
[] (sysfs_add_file_mode+0x84/0xdc) from [] (ds1307_probe+0x5e4/0x6ac)
[] (ds1307_probe+0x5e4/0x6ac) from [] (i2c_device_probe+0xdc/0x108)
[] (i2c_device_probe+0xdc/0x108) from [] (driver_probe_device+0x90/0x210)
[] (driver_probe_device+0x90/0x210) from [] (__driver_attach+0x94/0x98)
[] (__driver_attach+0x94/0x98) from [] (bus_for_each_dev+0x50/0x7c)
[] (bus_for_each_dev+0x50/0x7c) from [] (bus_add_driver+0x184/0x244)
[] (bus_add_driver+0x184/0x244) from [] (driver_register+0x78/0x12c)
[] (driver_register+0x78/0x12c) from [] (i2c_register_driver+0x2c/0xb4)
[] (i2c_register_driver+0x2c/0xb4) from [] (do_one_initcall+0x34/0x178)
[] (do_one_initcall+0x34/0x178) from [] (kernel_init+0xdc/0x194)
[] (kernel_init+0xdc/0x194) from [] (kernel_thread_exit+0x0/0x8)

Since commit 6992f5334995af4 ("sysfs: Use one lockdep class per sysfs
attribute") this initialization is required.

Reported-by: Stefano Babic 
Tested-by: Stefano Babic 
Signed-off-by: Anatolij Gustschin 
Cc: Alessandro Zummo 
Cc: Stefano Babic 
Cc: Eric W. Biederman 
Cc: Greg Kroah-Hartman 
Acked-by: Wolfram Sang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: ds1307: generalise ram size and offset

2012-03-23T23:58:40+00:00

Generalise NVRAM to support RAM with other size and offset, such as the
64 bytes of SRAM on the mcp7941x.

[rdunlap@xenotime.net: fix printk format warning]
Signed-off-by: Austin Boyle 
Signed-off-by: Wolfram Sang 
Signed-off-by: Randy Dunlap 
Cc: David Anders 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: ds1307: comment and format cleanup

2012-03-23T23:58:40+00:00

Do some cleanup of the comment sections as well as correct some
formatting issues reported by checkpatch.pl.

Signed-off-by: David Anders 
Signed-off-by: Wolfram Sang 
Cc: Austin Boyle 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: ds1307: simplify irq setup code

2012-03-23T23:58:40+00:00

No need to have two seperate if-blocks for setting up the irq.

Signed-off-by: Wolfram Sang 
Tested-by: David Anders 
Cc: Austin Boyle 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: ds1307: refactor chip_desc table

2012-03-23T23:58:40+00:00

The chip_desc table is suboptimal.  Currently it requires an entry for
every new chip type, even if it is empty.  This has already been
forgotten for the ds1388.  Refactor the code, so new entries are only
needed, when they chip type really needs a (non-empty) description.
Also make the table visually more appealing.

Signed-off-by: Wolfram Sang 
Cc: Austin Boyle 
Cc: David Anders 
Cc: Alessandro Zummo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: convert rtc i2c drivers to module_i2c_driver

2012-03-23T23:58:39+00:00

Factor out some boilerplate code for i2c driver registration into
module_i2c_driver.

Signed-off-by: Axel Lin 
Cc: Piotr Ziecik 
Cc: Alessandro Zummo 
Cc: Scott Wood 
Cc: Srikanth Srinivasan 
Cc: Mike Rapoport 
Cc: Sergey Lapin 
Cc: Roman Fietze 
Cc: Herbert Valerio Riedel 
Cc: Alexander Bigga 
Cc: Dale Farnsworth 
Cc: Gregory Hermant 
Cc: Wolfgang Grandegger 
Cc: Martyn Welch 
Cc: Byron Bradley 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

rtc: add initial support for mcp7941x parts

2011-11-02T23:06:58+00:00

Add initial support for the microchip mcp7941x series of real time clocks.

The mcp7941x series is generally compatible with the ds1307 and ds1337 rtc
devices from dallas semiconductor.  minor differences include a backup
battery enable bit, and the polarity of the oscillator enable bit.

Signed-off-by: David Anders 
Cc: Alessandro Zummo 
Reviewed-by: Wolfram Sang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

drivers/rtc/rtc-ds1307.c: add support for RTC device pt7c4338

2011-06-28T01:00:12+00:00

PT7C4338 chip is being manufactured by Pericom Technology Inc.  It is a
serial real-time clock which provides:

1) Low-power clock/calendar.
2) Programmable square-wave output.

It has 56 bytes of nonvolatile RAM.  Its register set is same as that of
rtc device: DS1307.

Signed-off-by: Priyanka Jain 
Acked-by: Timur Tabi 
Reviewed-by: Wolfram Sang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds