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>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 64330595e17b..f3f91e716a42 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -268,7 +268,7 @@ int pwmchip_add_with_polarity(struct pwm_chip *chip,
                 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 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
         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 @@ int pwm_set_polarity(struct pwm_device *pwm, enum pwm_polarity polarity)
         if (err)
                 return err;
 
-        pwm->polarity = polarity;
+        pwm->state.polarity = polarity;
 
         return 0;
 }