This patch set brings atomic operation to i.MX's PWMv2 driver.
This work has been supported and suggested by Boris Brezillon [1] and
Stefan Agner, by showing how simple the transition could be :-).
It has been divided into several steps:
- Provide different pwm ops for PWMv1 and PWM v2
- Separate PWMv1 commits from "generic" and non atomic PWM code.
NOTE: Since I do not have board with PWMv1, I would like to ask somebody
for testing
- Move some imx_config_v2 code to separate functions
- Provide PWM atomic implementation (the ->apply() driver) for PWMv2 in a
single patch for better readability.
- Remove redundant PWM code (disable, enable, config callbacks)
- Update proper documentation entries
- Provide support for polarity inversion on top of atomic PWM rework
Test HW:
--------
This patch set has been tested on i.MX6q board with vanilla 4.7, 4.8 and
v4.9-rc2 kernel SHA1: 07d9a380680d1c0eb51ef87ff2eab5c994949e69
The PWM operation has been tested with pwm_bl backlight driver by changing
its brightness.
[1]: http://patchwork.ozlabs.org/patch/685402/
Lothar Wassmann (2):
pwm: print error messages with pr_err() instead of pr_debug()
pwm: core: make the PWM_POLARITY flag in DTB optional
Lukasz Majewski (8):
pwm: imx: Add separate set of pwm ops for PWMv1 and PWMv2
pwm: imx: Rewrite imx_pwm_*_v1 code to facilitate switch to atomic pwm
operation
pwm: imx: Move PWMv2 software reset code to a separate function
pwm: imx: Move PWMv2 wait for fifo slot code to a separate function
pwm: imx: Provide atomic PWM support for i.MX PWMv2
pwm: imx: Remove redundant i.MX PWMv2 code
pwm: imx: doc: Update imx-pwm.txt documentation entry
pwm: imx: Add polarity inversion support to i.MX's PWMv2
Documentation/devicetree/bindings/pwm/imx-pwm.txt | 6 +-
drivers/pwm/core.c | 26 ++-
drivers/pwm/pwm-imx.c | 255 ++++++++++++----------
3 files changed, 152 insertions(+), 135 deletions(-)
--
2.1.4
