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Commit 22815f18 authored by Thierry Reding's avatar Thierry Reding Committed by Philipp Zabel
Browse files

reset: Add acquire/release support for arrays 



Add implementations that apply acquire and release operations to all
reset controls part of a reset control array.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
Reviewed-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent f31d5c24

drivers/reset/core.c

+35 −1
Original line number Diff line number Diff line
@@ -245,6 +245,34 @@ static int reset_control_array_deassert(struct reset_control_array *resets) 
	return ret;

}



static int reset_control_array_acquire(struct reset_control_array *resets)

{

	unsigned int i;

	int err;



	for (i = 0; i < resets->num_rstcs; i++) {

		err = reset_control_acquire(resets->rstc[i]);

		if (err < 0)

			goto release;

	}



	return 0;



release:

	while (i--)

		reset_control_release(resets->rstc[i]);



	return err;

}



static void reset_control_array_release(struct reset_control_array *resets)

{

	unsigned int i;



	for (i = 0; i < resets->num_rstcs; i++)

		reset_control_release(resets->rstc[i]);

}



static inline bool reset_control_is_array(struct reset_control *rstc)

{

	return rstc->array;
@@ -464,6 +492,9 @@ int reset_control_acquire(struct reset_control *rstc) 
	if (WARN_ON(IS_ERR(rstc)))

		return -EINVAL;



	if (reset_control_is_array(rstc))

		return reset_control_array_acquire(rstc_to_array(rstc));



	mutex_lock(&reset_list_mutex);



	if (rstc->acquired) {
@@ -502,6 +533,9 @@ void reset_control_release(struct reset_control *rstc) 
	if (!rstc || WARN_ON(IS_ERR(rstc)))

		return;



	if (reset_control_is_array(rstc))

		reset_control_array_release(rstc_to_array(rstc));

	else

		rstc->acquired = false;

}

EXPORT_SYMBOL_GPL(reset_control_release);

include/linux/reset.h

+6 −0
Original line number Diff line number Diff line
@@ -470,6 +470,12 @@ of_reset_control_array_get_exclusive(struct device_node *node) 
	return of_reset_control_array_get(node, false, false, true);

}



static inline struct reset_control *

of_reset_control_array_get_exclusive_released(struct device_node *node)

{

	return of_reset_control_array_get(node, false, false, false);

}



static inline struct reset_control *

of_reset_control_array_get_shared(struct device_node *node)

{