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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc 
 kernel/drivers/phy/phy-core.c
....@@ -1,14 +1,10 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * phy-core.c  --  Generic Phy framework.
34  *
45  * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
56  *
67  * Author: Kishon Vijay Abraham I <kishon@ti.com>
7
- *
8
- * This program is free software; you can redistribute  it and/or modify it
9
- * under  the terms of  the GNU General  Public License as published by the
10
- * Free Software Foundation;  either version 2 of the  License, or (at your
11
- * option) any later version.
128  */
139 
1410 #include <linux/kernel.h>
....@@ -33,7 +29,7 @@
3329 {
3430 	struct phy *phy = *(struct phy **)res;
3531 
36
-	phy_put(phy);
32
+	phy_put(dev, phy);
3733 }
3834 
3935 static void devm_phy_provider_release(struct device *dev, void *res)
....@@ -360,7 +356,7 @@
360356 }
361357 EXPORT_SYMBOL_GPL(phy_power_off);
362358 
363
-int phy_set_mode(struct phy *phy, enum phy_mode mode)
359
+int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode)
364360 {
365361 	int ret;
366362 
....@@ -368,14 +364,14 @@
368364 		return 0;
369365 
370366 	mutex_lock(&phy->mutex);
371
-	ret = phy->ops->set_mode(phy, mode);
367
+	ret = phy->ops->set_mode(phy, mode, submode);
372368 	if (!ret)
373369 		phy->attrs.mode = mode;
374370 	mutex_unlock(&phy->mutex);
375371 
376372 	return ret;
377373 }
378
-EXPORT_SYMBOL_GPL(phy_set_mode);
374
+EXPORT_SYMBOL_GPL(phy_set_mode_ext);
379375 
380376 int phy_reset(struct phy *phy)
381377 {
....@@ -384,27 +380,36 @@
384380 	if (!phy || !phy->ops->reset)
385381 		return 0;
386382 
383
+	ret = phy_pm_runtime_get_sync(phy);
384
+	if (ret < 0 && ret != -ENOTSUPP)
385
+		return ret;
386
+
387387 	mutex_lock(&phy->mutex);
388388 	ret = phy->ops->reset(phy);
389389 	mutex_unlock(&phy->mutex);
390
+
391
+	phy_pm_runtime_put(phy);
390392 
391393 	return ret;
392394 }
393395 EXPORT_SYMBOL_GPL(phy_reset);
394396 
397
+/**
398
+ * phy_calibrate() - Tunes the phy hw parameters for current configuration
399
+ * @phy: the phy returned by phy_get()
400
+ *
401
+ * Used to calibrate phy hardware, typically by adjusting some parameters in
402
+ * runtime, which are otherwise lost after host controller reset and cannot
403
+ * be applied in phy_init() or phy_power_on().
404
+ *
405
+ * Returns: 0 if successful, an negative error code otherwise
406
+ */
395407 int phy_calibrate(struct phy *phy)
396408 {
397409 	int ret;
398410 
399411 	if (!phy || !phy->ops->calibrate)
400412 		return 0;
401
-
402
-	if (phy->dev.parent &&
403
-	    of_device_is_compatible(phy->dev.parent->of_node,
404
-				    "rockchip,rv1126-usb2phy")) {
405
-		ret = phy->ops->calibrate(phy);
406
-		return ret;
407
-	}
408413 
409414 	mutex_lock(&phy->mutex);
410415 	ret = phy->ops->calibrate(phy);
....@@ -561,18 +566,37 @@
561566 EXPORT_SYMBOL_GPL(of_phy_get);
562567 
563568 /**
564
- * phy_put() - release the PHY
565
- * @phy: the phy returned by phy_get()
569
+ * of_phy_put() - release the PHY
570
+ * @phy: the phy returned by of_phy_get()
566571  *
567
- * Releases a refcount the caller received from phy_get().
572
+ * Releases a refcount the caller received from of_phy_get().
568573  */
569
-void phy_put(struct phy *phy)
574
+void of_phy_put(struct phy *phy)
570575 {
571576 	if (!phy || IS_ERR(phy))
572577 		return;
573578 
579
+	mutex_lock(&phy->mutex);
580
+	if (phy->ops->release)
581
+		phy->ops->release(phy);
582
+	mutex_unlock(&phy->mutex);
583
+
574584 	module_put(phy->ops->owner);
575585 	put_device(&phy->dev);
586
+}
587
+EXPORT_SYMBOL_GPL(of_phy_put);
588
+
589
+/**
590
+ * phy_put() - release the PHY
591
+ * @dev: device that wants to release this phy
592
+ * @phy: the phy returned by phy_get()
593
+ *
594
+ * Releases a refcount the caller received from phy_get().
595
+ */
596
+void phy_put(struct device *dev, struct phy *phy)
597
+{
598
+	device_link_remove(dev, &phy->dev);
599
+	of_phy_put(phy);
576600 }
577601 EXPORT_SYMBOL_GPL(phy_put);
578602 
....@@ -641,6 +665,7 @@
641665 {
642666 	int index = 0;
643667 	struct phy *phy;
668
+	struct device_link *link;
644669 
645670 	if (string == NULL) {
646671 		dev_WARN(dev, "missing string\n");
....@@ -662,6 +687,11 @@
662687 
663688 	get_device(&phy->dev);
664689 
690
+	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
691
+	if (!link)
692
+		dev_dbg(dev, "failed to create device link to %s\n",
693
+			dev_name(phy->dev.parent));
694
+
665695 	return phy;
666696 }
667697 EXPORT_SYMBOL_GPL(phy_get);
....@@ -680,7 +710,7 @@
680710 {
681711 	struct phy *phy = phy_get(dev, string);
682712 
683
-	if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
713
+	if (PTR_ERR(phy) == -ENODEV)
684714 		phy = NULL;
685715 
686716 	return phy;
....@@ -734,7 +764,7 @@
734764 {
735765 	struct phy *phy = devm_phy_get(dev, string);
736766 
737
-	if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV))
767
+	if (PTR_ERR(phy) == -ENODEV)
738768 		phy = NULL;
739769 
740770 	return phy;
....@@ -755,6 +785,7 @@
755785 			    const char *con_id)
756786 {
757787 	struct phy **ptr, *phy;
788
+	struct device_link *link;
758789 
759790 	ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
760791 	if (!ptr)
....@@ -766,7 +797,13 @@
766797 		devres_add(dev, ptr);
767798 	} else {
768799 		devres_free(ptr);
800
+		return phy;
769801 	}
802
+
803
+	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
804
+	if (!link)
805
+		dev_dbg(dev, "failed to create device link to %s\n",
806
+			dev_name(phy->dev.parent));
770807 
771808 	return phy;
772809 }
....@@ -788,6 +825,7 @@
788825 				     int index)
789826 {
790827 	struct phy **ptr, *phy;
828
+	struct device_link *link;
791829 
792830 	ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
793831 	if (!ptr)
....@@ -808,6 +846,11 @@
808846 
809847 	*ptr = phy;
810848 	devres_add(dev, ptr);
849
+
850
+	link = device_link_add(dev, &phy->dev, DL_FLAG_STATELESS);
851
+	if (!link)
852
+		dev_dbg(dev, "failed to create device link to %s\n",
853
+			dev_name(phy->dev.parent));
811854 
812855 	return phy;
813856 }
....@@ -1019,6 +1062,7 @@
10191062  * __devm_of_phy_provider_register() - create/register phy provider with the
10201063  * framework
10211064  * @dev: struct device of the phy provider
1065
+ * @children: device node containing children (if different from dev->of_node)
10221066  * @owner: the module owner containing of_xlate
10231067  * @of_xlate: function pointer to obtain phy instance from phy provider
10241068  *
....@@ -1074,12 +1118,14 @@
10741118 /**
10751119  * devm_of_phy_provider_unregister() - remove phy provider from the framework
10761120  * @dev: struct device of the phy provider
1121
+ * @phy_provider: phy provider returned by of_phy_provider_register()
10771122  *
10781123  * destroys the devres associated with this phy provider and invokes
10791124  * of_phy_provider_unregister to unregister the phy provider.
10801125  */
10811126 void devm_of_phy_provider_unregister(struct device *dev,
1082
-	struct phy_provider *phy_provider) {
1127
+	struct phy_provider *phy_provider)
1128
+{
10831129 	int r;
10841130 
10851131 	r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match,
....@@ -1119,18 +1165,4 @@
11191165 
11201166 	return 0;
11211167 }
1122
-#ifdef CONFIG_ROCKCHIP_THUNDER_BOOT
1123
-subsys_initcall(phy_core_init);
1124
-#else
1125
-module_init(phy_core_init);
1126
-#endif
1127
-
1128
-static void __exit phy_core_exit(void)
1129
-{
1130
-	class_destroy(phy_class);
1131
-}
1132
-module_exit(phy_core_exit);
1133
-
1134
-MODULE_DESCRIPTION("Generic PHY Framework");
1135
-MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>");
1136
-MODULE_LICENSE("GPL v2");
1168
+device_initcall(phy_core_init);