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pwm: Add hardware readout infrastructure

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Add a ->get_state() function to the pwm_ops struct to let PWM drivers
initialize the PWM state attached to a PWM device.

Signed-off-by: Boris Brezillon <[email protected]>
Signed-off-by: Thierry Reding <[email protected]>
This commit is contained in:
Boris Brezillon 2016-04-14 21:17:40 +02:00 • committed by Thierry Reding
commit 15fa8a43c1
2 changed files with 31 additions and 0 deletions
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3
drivers/pwm/core.c
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@ -270,6 +270,9 @@ int pwmchip_add_with_polarity(struct pwm_chip *chip,
pwm->hwpwm = i;
pwm->state.polarity = polarity;
if (chip->ops->get_state)
chip->ops->get_state(chip, pwm, &pwm->state);
radix_tree_insert(&pwm_tree, pwm->pwm, pwm);
}