[PATCH v10 0/1] Fix bugs in kona pwm driver and pwm core

Jonathan Richardson
2015-10-17T00:40:10Z

Fixes a bug in the pwm core where the enabled state was incorrect on failed
calls to enable.

Changes from v9:
- pwm_set_polarity() enabled check is protected using the same mutex as
pwm_enable() in pwm core. Implemented as suggested by Thierry.

Changes from v8:
- Accepted patches not included. Patch to introduce debug statements to config
in kona pwm driver not included - will be addressed later.
- Added mutex to pwm core enable function to prevent potential concurrency
issue, as suggested by Thierry.
- Fixed commit message for kona pwm changes. Also changed wording in comments
from enable to trigger.

Changes from v7:
- Polarity changes take effect immediately instead of being deferred until
enable is called.

Changes from v6:
- Move new debugging info for duty cycle and period in config function into
its own commit.
- Add kona_pwmc_prepare_for_settings() function to remove duplicated code.

Changes from v5:
- Address Dmitry's comment on code cleanup of pwm_enable() in pwm core.
- Including all patches from different contributors in this patchset. Some
were left out in v4.

Changes from v4:
- Rebased to Tim Kryger's patch that adds support in pwm core to add driver
with inversed polarity.
- Removed patch 2 that resolved difference between hardware default polarity
and pwm framework default polarity. The default polarity is set properly now
when the pwm driver is registered with the pwm framework.

Jonathan Richardson (1):
pwm: core: Set enable state properly on failed call to enable

drivers/pwm/core.c | 33 ++++++++++++++++++++++++++-------
include/linux/pwm.h | 2 ++
2 files changed, 28 insertions(+), 7 deletions(-)

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1.9.1