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pwm: Provide wrappers for storing and getting driver private data

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These functions are useful to store and query driver private data
depending on the pwm_chip. After struct pwm_chip got its own struct
device, this can make use of dev_get_drvdata() and dev_set_drvdata() on
that device. These functions are required already now to convert
drivers to pwmchip_alloc() which must happen before changing
pwm_chip::dev.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/67514cdf29d29bd8b4ad8d44fac87f6ae6dca1e5.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2024-02-14 10:30:49 +01:00
parent 4e59267c7a
commit 24003d501f
1 changed files with 20 additions and 0 deletions
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20
include/linux/pwm.h
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@ -272,6 +272,7 @@ struct pwm_ops {
* @npwm: number of PWMs controlled by this chip
* @of_xlate: request a PWM device given a device tree PWM specifier
* @atomic: can the driver's ->apply() be called in atomic context
* @driver_data: Private pointer for driver specific info
* @pwms: array of PWM devices allocated by the framework
*/
struct pwm_chip {
@ -286,6 +287,7 @@ struct pwm_chip {
bool atomic;
/* only used internally by the PWM framework */
void *driver_data;
struct pwm_device *pwms;
};
@ -294,6 +296,24 @@ static inline struct device *pwmchip_parent(const struct pwm_chip *chip)
return chip->dev;
}
static inline void *pwmchip_get_drvdata(struct pwm_chip *chip)
{
/*
* After pwm_chip got a dedicated struct device, this can be replaced by
* dev_get_drvdata(&chip->dev);
*/
return chip->driver_data;
}
static inline void pwmchip_set_drvdata(struct pwm_chip *chip, void *data)
{
/*
* After pwm_chip got a dedicated struct device, this can be replaced by
* dev_set_drvdata(&chip->dev, data);
*/
chip->driver_data = data;
}
#if IS_ENABLED(CONFIG_PWM)
/* PWM user APIs */
int pwm_apply_might_sleep(struct pwm_device *pwm, const struct pwm_state *state);