These functions are useful to store and query driver private data a
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.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
---
include/linux/pwm.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index d7966918f301..2c49d2fe2fe7 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -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(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);
--
2.43.0
