linux-toradex.git/include/linux/pwm.h, branch v4.6-rc3

pwm: Set enable state properly on failed call to enable

2015-11-10T12:06:16+00:00

The pwm_enable() function didn't clear the enabled bit if a call to the
driver's ->enable() callback returned an error. The result was that the
state of the PWM core was wrong. Clearing the bit when enable returns
an error ensures the state is properly set.

Tested-by: Jonathan Richardson 
Reviewed-by: Dmitry Torokhov 
Signed-off-by: Jonathan Richardson 
[thierry.reding@gmail.com: add missing kerneldoc for the lock]
Signed-off-by: Thierry Reding

pwm: Clean up kerneldoc

2015-08-17T13:40:20+00:00

Clean up kerneldoc in preparation for including the PWM documentation in
DocBook.

Signed-off-by: Thierry Reding

pwm: Remove useless whitespace

2015-08-17T13:40:19+00:00

Remove useless tabs used for padding in structure definitions as well as
some blank lines.

Signed-off-by: Thierry Reding

pwm: Add pwm_get_polarity() helper function

2015-07-20T07:51:27+00:00

Some drivers are directly accessing the ->polarity field in pwm_device.
Add a helper to retrieve the current polarity so that we can easily move
this field elsewhere (required to support atomic update).

Signed-off-by: Boris Brezillon 
Signed-off-by: Thierry Reding

pwm: Constify PWM device where possible

2015-07-20T07:48:34+00:00

The PWM argument is not modified in PWM property accessors, make it a
const argument so that the accessors can be used from sysfs.

Signed-off-by: Boris Brezillon 
Signed-off-by: Thierry Reding

pwm: Add the pwm_is_enabled() helper

2015-07-20T07:46:06+00:00

Some PWM drivers are testing the PWMF_ENABLED flag. Create a helper
function to hide the logic behind enabled test. This will allow us to
smoothly move from the current approach to an atomic PWM update
approach.

Signed-off-by: Boris Brezillon 
Signed-off-by: Thierry Reding

pwm: Add pwmchip_add_with_polarity() API

2015-06-12T09:36:30+00:00

Add a new function to register a PWM chip with channels that have their
initial polarity as specified by an additional parameter. This benefits
drivers of controllers that by default operate with inversed polarity
by removing the need to modify the polarity during initialization.

Signed-off-by: Tim Kryger 
Signed-off-by: Jonathan Richardson 
[thierry.reding@gmail.com: export pwmchip_add_with_polarity()]
Signed-off-by: Thierry Reding

pwm: Add support to remove registered consumer lookup tables

2015-05-06T12:19:35+00:00

In case some drivers are unloading, they can remove lookup tables which
they had registered during their load time to avoid redundant entries if
loaded again.

CC: Samuel Ortiz 
Cc: Linus Walleij 
Cc: Alexandre Courbot 
Cc: Thierry Reding 
Signed-off-by: Shobhit Kumar 
Signed-off-by: Thierry Reding

pwm: modify PWM_LOOKUP to initialize all struct pwm_lookup members

2014-05-21T09:19:36+00:00

Now that PWM_LOOKUP is not used anymore, modify it to initialize all the
members of struct pwm_lookup.

Signed-off-by: Alexandre Belloni 
Signed-off-by: Thierry Reding

pwm: add period and polarity to struct pwm_lookup

2014-05-21T07:03:07+00:00

Add period and polarity members to struct pwm_lookup so that platforms
using the lookup table can be treated the same way as those using the
device tree.

Signed-off-by: Alexandre Belloni 
Signed-off-by: Thierry Reding