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Commit 40faee8e authored by Lee Jones's avatar Lee Jones Committed by Philipp Zabel
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reset: Supply *_shared variant calls when using of_* API 



Consumers need to be able to specify whether they are requesting an
'exclusive' or 'shared' reset line no matter which API (of_*, devm_*,
etc) they are using.  This change allows users of the of_* API in
particular to specify that their request is for a 'shared' line.

Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent a53e35db

include/linux/reset.h

+53 −0
Original line number Original line Diff line number Diff line
@@ -157,6 +157,31 @@ static inline struct reset_control *of_reset_control_get_exclusive( 
	return __of_reset_control_get(node, id, 0, 0);

	return __of_reset_control_get(node, id, 0, 0);

}

}





/**

 * of_reset_control_get_shared - Lookup and obtain an shared reference

 *                               to a reset controller.

 * @node: device to be reset by the controller

 * @id: reset line name

 *

 * When a reset-control is shared, the behavior of reset_control_assert /

 * deassert is changed, the reset-core will keep track of a deassert_count

 * and only (re-)assert the reset after reset_control_assert has been called

 * as many times as reset_control_deassert was called. Also see the remark

 * about shared reset-controls in the reset_control_assert docs.

 *

 * Calling reset_control_assert without first calling reset_control_deassert

 * is not allowed on a shared reset control. Calling reset_control_reset is

 * also not allowed on a shared reset control.

 * Returns a struct reset_control or IS_ERR() condition containing errno.

 *

 * Use of id names is optional.

 */

static inline struct reset_control *of_reset_control_get_shared(

				struct device_node *node, const char *id)

{

	return __of_reset_control_get(node, id, 0, 1);

}



/**

/**

 * of_reset_control_get_exclusive_by_index - Lookup and obtain an exclusive

 * of_reset_control_get_exclusive_by_index - Lookup and obtain an exclusive

 *                                           reference to a reset controller

 *                                           reference to a reset controller
@@ -174,6 +199,34 @@ static inline struct reset_control *of_reset_control_get_exclusive_by_index( 
	return __of_reset_control_get(node, NULL, index, 0);

	return __of_reset_control_get(node, NULL, index, 0);

}

}





/**

 * of_reset_control_get_shared_by_index - Lookup and obtain an shared

 *                                        reference to a reset controller

 *                                        by index.

 * @node: device to be reset by the controller

 * @index: index of the reset controller

 *

 * When a reset-control is shared, the behavior of reset_control_assert /

 * deassert is changed, the reset-core will keep track of a deassert_count

 * and only (re-)assert the reset after reset_control_assert has been called

 * as many times as reset_control_deassert was called. Also see the remark

 * about shared reset-controls in the reset_control_assert docs.

 *

 * Calling reset_control_assert without first calling reset_control_deassert

 * is not allowed on a shared reset control. Calling reset_control_reset is

 * also not allowed on a shared reset control.

 * Returns a struct reset_control or IS_ERR() condition containing errno.

 *

 * This is to be used to perform a list of resets for a device or power domain

 * in whatever order. Returns a struct reset_control or IS_ERR() condition

 * containing errno.

 */

static inline struct reset_control *of_reset_control_get_shared_by_index(

					struct device_node *node, int index)

{

	return __of_reset_control_get(node, NULL, index, 1);

}



/**

/**

 * devm_reset_control_get_exclusive - resource managed

 * devm_reset_control_get_exclusive - resource managed

 *                                    reset_control_get_exclusive()

 *                                    reset_control_get_exclusive()