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pwm: Add a device-managed function to add PWM chips

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This potentially simplifies low-level PWM drivers.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Uwe Kleine-König 2021-04-07 10:01:54 +02:00 committed by Thierry Reding
parent d233504af7
commit bcda91bf86
2 changed files with 22 additions and 0 deletions
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19
drivers/pwm/core.c
View file

@ -335,6 +335,25 @@ int pwmchip_remove(struct pwm_chip *chip)
}
EXPORT_SYMBOL_GPL(pwmchip_remove);
static void devm_pwmchip_remove(void *data)
{
struct pwm_chip *chip = data;
pwmchip_remove(chip);
}
int devm_pwmchip_add(struct device *dev, struct pwm_chip *chip)
{
int ret;
ret = pwmchip_add(chip);
if (ret)
return ret;
return devm_add_action_or_reset(dev, devm_pwmchip_remove, chip);
}
EXPORT_SYMBOL_GPL(devm_pwmchip_add);
/**
* pwm_request() - request a PWM device
* @pwm: global PWM device index

3
include/linux/pwm.h
View file

@ -405,6 +405,9 @@ void *pwm_get_chip_data(struct pwm_device *pwm);
int pwmchip_add(struct pwm_chip *chip);
int pwmchip_remove(struct pwm_chip *chip);
int devm_pwmchip_add(struct device *dev, struct pwm_chip *chip);
struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,
unsigned int index,
const char *label);