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:
- 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) in a single patch
for better readability.
- Remove redundant PWM code (disable, enable, config callbacks)
- Clean up the driver infrastructure
- Provide "polarity_supported" flag to indicate support for polarity
inversion
This work should be applied on top of following commits:
http://patchwork.ozlabs.org/patch/679706/
http://patchwork.ozlabs.org/patch/679707/
http://patchwork.ozlabs.org/patch/679680/
Test HW:
--------
This patch set has been tested on i.MX6q board with vanilla 4.7 kernel.
It applies clearly on 4.9-rcX SHA1: 0c2b6dc4fd4fa13796b319aae969a009f03222c6
The PWM operation has been tested with pwm_bl backlight driver by changing
its brightness.
[1]: http://patchwork.ozlabs.org/patch/685402/
Lukasz Majewski (6):
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 IMXv2 PWM
pwm: imx: Remove redundant IMX PWMv2 code
pwm: imx: Introduce "polarity_supported" flag to PWMv2 driver
drivers/pwm/pwm-imx.c | 262 ++++++++++++++++++++++----------------------------
1 file changed, 114 insertions(+), 148 deletions(-)
--
2.1.4
