Commit Graph

16 Commits

Author SHA1 Message Date
Lars-Peter Clausen a40402ef0b bq27x00: Prepare code for addition of bq27000 platform driver
This patch simplifies the drivers data structure and moves code to be
shared by the bq27000 and bq27200/bq27500 init functions into a common
function.
This patch has no functional changes, it only moves code around.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
2011-02-22 11:02:41 +01:00
Lars-Peter Clausen 3413b4ea25 bq27x00: Return -ENODEV for properties if the battery is not present
This patch changes get_property callback of the bq27x00 battery to return
-ENODEV for properties other then the PROP_PRESENT if the battery is not
present.
The power subsystem core expects a driver to behave that way.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
2011-02-22 11:02:40 +01:00
Pali Rohár a2e5118c37 bq27x00: Fix CURRENT_NOW property
According to the bq27000 datasheet the current should be calculated by
the following formula:
    current = AI * 3570 / 20

This patch adjust the drivers code accordingly.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
2011-02-22 11:02:39 +01:00
Lars-Peter Clausen 0e9f30497e bq27x00: Improve temperature property precession
This patch improves the precession of the temperature property of the
bq27x00 driver.
By dividing before multiplying the current code effectively cuts of the
last decimal digit. This patch fixes it by multiplying before dividing.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
2011-02-22 11:02:39 +01:00
Lars-Peter Clausen 5661f334e8 bq27x00: Add type property
This patch adds the type property to the bq27x00 battery driver.
All bq27x00 are lithium ion batteries.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
2011-02-22 11:02:38 +01:00
Axel Lin 9292585c67 bq27x00_battery: Add missing kfree(di->bus) in bq27x00_battery_remove()
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2010-10-06 17:38:15 +04:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Grazvydas Ignotas afbc74fdc5 power_supply: bq27x00: fix voltage and current units
The chip returns voltage and current in mV and mA, but
power supply class uses uV and uA, so add missing conversion.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2010-02-27 18:09:24 +03:00
Grazvydas Ignotas 4e924a814a power_supply: bq27x00: add status and time properties
The BQ27x00 series of chips can report time-to-empty and
time-to-full, so let's add corresponding properties.
Also report charge status based on status flag register.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2010-02-27 18:09:23 +03:00
Grazvydas Ignotas e20908d95e power_supply: bq27x00: add BQ27500 support
BQ27500 is newer fuel gauge chip from TI with slightly changed
register layout and some different register semantics. Add new i2c
ID for it and handle differences where needed. Also rename bq27200
functions to bq27x00, as they are no longer bq27200 specific.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2010-02-16 21:26:52 +03:00
Grazvydas Ignotas b4de360815 power_supply: bq27x00: fix temperature conversion
The power supply class requires tenths of degree Celsius.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2010-02-16 21:26:46 +03:00
Grazvydas Ignotas ba96f8717e power_supply: bq27x00: remove unused struct fields
These are probably leftover from old TI code.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2010-02-16 21:26:37 +03:00
Grazvydas Ignotas 97f70c23a1 power_supply: bq27x00: remove double endian swap
The bq27x00 registers are little endian, so just read them as such
and don't do double endian swap on LE machines.

This also gets rid of strange looking shift that was done after
reading 8bit register because endian swap in bq27x00_read() was
messing it up.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2010-02-16 21:26:14 +03:00
Adam Buchbinder b731d7b6a7 trivial: Fix misspelling of "Celsius".
A few comments say "Celcius"; this fixes them. No code changes.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-03-30 15:22:03 +02:00
Harvey Harrison 8aef7e8f8d bq27x00_battery: use unaligned access helper
Remove hand-rolled get_unaligned_be16, this points to a possible bug as
bq27x00_read does another endian byteswap which sparse notices:

drivers/power/bq27x00_battery.c:81:14: warning: cast to restricted __be16
Which should probably be checked.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Cc: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2008-09-26 03:46:12 +04:00
Rodolfo Giometti b996ad0e9f power_supply: Support for Texas Instruments BQ27200 battery managers
These battery managers came in two different packages: one for I2C
busses (BQ27200) and one for HDQ busses (BQ27000).

This driver currently supports only the I2C chip version but the code
is designed in order to easily allow the HDQ chip version integration.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: make things static, use kasprintf()]
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2008-09-01 02:46:12 +04:00