pwm: Introduce the pwm_state concept
The PWM state, represented by its period, duty_cycle and polarity is
currently directly stored in the PWM device. Declare a pwm_state
structure embedding those field so that we can later use this struct
to atomically update all the PWM parameters at once.
All pwm_get_xxx() helpers are now implemented as wrappers around
pwm_get_state().
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 6433059..f3f91e7 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -268,7 +268,7 @@
pwm->chip = chip;
pwm->pwm = chip->base + i;
pwm->hwpwm = i;
- pwm->polarity = polarity;
+ pwm->state.polarity = polarity;
radix_tree_insert(&pwm_tree, pwm->pwm, pwm);
}
@@ -446,8 +446,8 @@
if (err)
return err;
- pwm->duty_cycle = duty_ns;
- pwm->period = period_ns;
+ pwm->state.duty_cycle = duty_ns;
+ pwm->state.period = period_ns;
return 0;
}
@@ -480,7 +480,7 @@
if (err)
return err;
- pwm->polarity = polarity;
+ pwm->state.polarity = polarity;
return 0;
}