drivers/dpll/dpll_core.c

72 dpll_xa_ref_pin_add(struct xarray *xa_pins, struct dpll_pin *pin,
83 		if (ref->pin != pin)
98 		ref->pin = pin;
100 		ret = xa_insert(xa_pins, pin->pin_idx, ref, GFP_KERNEL);
111 			xa_erase(xa_pins, pin->pin_idx);
126 static int dpll_xa_ref_pin_del(struct xarray *xa_pins, struct dpll_pin *pin,
135 		if (ref->pin != pin)
486 	struct dpll_pin *pin;
489 	pin = kzalloc(sizeof(*pin), GFP_KERNEL);
490 	if (!pin)
492 	pin->pin_idx = pin_idx;
493 	pin->clock_id = clock_id;
494 	pin->module = module;
500 	ret = dpll_pin_prop_dup(prop, &pin->prop);
503 	refcount_set(&pin->refcount, 1);
504 	xa_init_flags(&pin->dpll_refs, XA_FLAGS_ALLOC);
505 	xa_init_flags(&pin->parent_refs, XA_FLAGS_ALLOC);
506 	ret = xa_alloc_cyclic(&dpll_pin_xa, &pin->id, pin, xa_limit_32b,
510 	return pin;
512 	xa_destroy(&pin->dpll_refs);
513 	xa_destroy(&pin->parent_refs);
514 	dpll_pin_prop_free(&pin->prop);
516 	kfree(pin);
541  * dpll_pin_get - find existing or create new dpll pin
545  * @prop: dpll pin properties
547  * Get existing object of a pin (unique for given arguments) or create new
582  * @pin: pointer to a pin to be put
584  * Drop reference for a pin, if all references are gone, delete pin object.
588 void dpll_pin_put(struct dpll_pin *pin)
591 	if (refcount_dec_and_test(&pin->refcount)) {
592 		xa_erase(&dpll_pin_xa, pin->id);
593 		xa_destroy(&pin->dpll_refs);
594 		xa_destroy(&pin->parent_refs);
595 		dpll_pin_prop_free(&pin->prop);
596 		kfree_rcu(pin, rcu);
603 __dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin,
608 	ret = dpll_xa_ref_pin_add(&dpll->pin_refs, pin, ops, priv, cookie);
611 	ret = dpll_xa_ref_dpll_add(&pin->dpll_refs, dpll, ops, priv, cookie);
614 	xa_set_mark(&dpll_pin_xa, pin->id, DPLL_REGISTERED);
615 	dpll_pin_create_ntf(pin);
620 	dpll_xa_ref_pin_del(&dpll->pin_refs, pin, ops, priv, cookie);
625  * dpll_pin_register - register the dpll pin in the subsystem
627  * @pin: pointer to a dpll pin
628  * @ops: ops for a dpll pin ops
637 dpll_pin_register(struct dpll_device *dpll, struct dpll_pin *pin,
648 	if (WARN_ON(!(dpll->module == pin->module &&
649 		      dpll->clock_id == pin->clock_id)))
652 		ret = __dpll_pin_register(dpll, pin, ops, priv, NULL);
660 __dpll_pin_unregister(struct dpll_device *dpll, struct dpll_pin *pin,
663 	ASSERT_DPLL_PIN_REGISTERED(pin);
664 	dpll_xa_ref_pin_del(&dpll->pin_refs, pin, ops, priv, cookie);
665 	dpll_xa_ref_dpll_del(&pin->dpll_refs, dpll, ops, priv, cookie);
666 	if (xa_empty(&pin->dpll_refs))
667 		xa_clear_mark(&dpll_pin_xa, pin->id, DPLL_REGISTERED);
671  * dpll_pin_unregister - unregister dpll pin from dpll device
673  * @pin: pointer to a pin
674  * @ops: ops for a dpll pin
680 void dpll_pin_unregister(struct dpll_device *dpll, struct dpll_pin *pin,
685 	if (WARN_ON(!xa_empty(&pin->parent_refs)))
689 	dpll_pin_delete_ntf(pin);
690 	__dpll_pin_unregister(dpll, pin, ops, priv, NULL);
696  * dpll_pin_on_pin_register - register a pin with a parent pin
697  * @parent: pointer to a parent pin
698  * @pin: pointer to a pin
699  * @ops: ops for a dpll pin
702  * Register a pin with a parent pin, create references between them and
703  * between newly registered pin and dplls connected with a parent pin.
710 int dpll_pin_on_pin_register(struct dpll_pin *parent, struct dpll_pin *pin,
726 	ret = dpll_xa_ref_pin_add(&pin->parent_refs, parent, ops, priv, pin);
729 	refcount_inc(&pin->refcount);
731 		ret = __dpll_pin_register(ref->dpll, pin, ops, priv, parent);
736 		dpll_pin_create_ntf(pin);
745 			__dpll_pin_unregister(ref->dpll, pin, ops, priv,
747 			dpll_pin_delete_ntf(pin);
749 	refcount_dec(&pin->refcount);
750 	dpll_xa_ref_pin_del(&pin->parent_refs, parent, ops, priv, pin);
758  * dpll_pin_on_pin_unregister - unregister dpll pin from a parent pin
759  * @parent: pointer to a parent pin
760  * @pin: pointer to a pin
761  * @ops: ops for a dpll pin
767 void dpll_pin_on_pin_unregister(struct dpll_pin *parent, struct dpll_pin *pin,
774 	dpll_pin_delete_ntf(pin);
775 	dpll_xa_ref_pin_del(&pin->parent_refs, parent, ops, priv, pin);
776 	refcount_dec(&pin->refcount);
777 	xa_for_each(&pin->dpll_refs, i, ref)
778 		__dpll_pin_unregister(ref->dpll, pin, ops, priv, parent);
822 			    struct dpll_pin *pin)
827 	ref = xa_load(&dpll->pin_refs, pin->pin_idx);
835 			   struct dpll_pin *pin)
840 	ref = xa_load(&pin->parent_refs, parent->pin_idx);