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pwm: Introduce the pwm_state concept

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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 <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
This commit is contained in:
Boris Brezillon 2016-04-14 21:17:38 +02:00 • committed by Thierry Reding
commit 43a276b003
2 changed files with 46 additions and 16 deletions
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8
drivers/pwm/core.c
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@ -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;
}