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Subject[PATCH] pwm: core: Use pwm->args.polarity to setup PWM_POLARITY_INVERSED
Date
The pwm_set_polarity() function finally calls pwm_apply_state(), which
in turn requires state->duty_cycle and state->period properly set.

In the moment when polarity is set, the PWM is disabled and not configured.
For that reason both above variables are set to 0 and the polarity is not
set.

To be sure that polarity is setup, one needs to set pwm->args.polarity, which
controls MX3_PWMCR_POUTC bit setting at imx_pwm_config_v2().

Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
---
This patch should be applied on top of:

"[v2,2/6] pwm: core: make the PWM_POLARITY flag in DTB optional"

http://patchwork.ozlabs.org/patch/677330/

---
drivers/pwm/core.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 1f62668..6cd6004 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -153,13 +153,11 @@ of_pwm_xlate_with_flags(struct pwm_chip *pc, const struct of_phandle_args *args)
return pwm;

pwm->args.period = args->args[1];
+ pwm->args.polarity = PWM_POLARITY_NORMAL;

- if (args->args_count > 2) {
+ if (args->args_count > 2)
if (args->args[2] & PWM_POLARITY_INVERTED)
- pwm_set_polarity(pwm, PWM_POLARITY_INVERSED);
- else
- pwm_set_polarity(pwm, PWM_POLARITY_NORMAL);
- }
+ pwm->args.polarity = PWM_POLARITY_INVERSED;

return pwm;
}
--
2.1.4
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