1 files changed, 367 insertions, 226 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 0c6f06abe3f4..416d87f9bd10 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/acpi.h>
 #include <linux/acpi_iort.h>
+#include <linux/acpi_rimt.h>
 #include <linux/acpi_viot.h>
 #include <linux/iommu.h>
 #include <linux/signal.h>
@@ -23,8 +24,7 @@
 #include <linux/dma-direct.h>
 
 #include "internal.h"
-
-extern struct acpi_device *acpi_root;
+#include "sleep.h"
 
 #define ACPI_BUS_CLASS			"system_bus"
 #define ACPI_BUS_HID			"LNXSYBUS"
@@ -74,8 +74,7 @@ void acpi_unlock_hp_context(void)
 
 void acpi_initialize_hp_context(struct acpi_device *adev,
 				struct acpi_hotplug_context *hp,
-				int (*notify)(struct acpi_device *, u32),
-				void (*uevent)(struct acpi_device *, u32))
+				acpi_hp_notify notify, acpi_hp_uevent uevent)
 {
 	acpi_lock_hp_context();
 	hp->notify = notify;
@@ -245,11 +244,85 @@ static int acpi_scan_try_to_offline(struct acpi_device *device)
 	return 0;
 }
 
+#define ACPI_SCAN_CHECK_FLAG_STATUS	BIT(0)
+#define ACPI_SCAN_CHECK_FLAG_EJECT	BIT(1)
+
+static int acpi_scan_check_and_detach(struct acpi_device *adev, void *p)
+{
+	struct acpi_scan_handler *handler = adev->handler;
+	uintptr_t flags = (uintptr_t)p;
+
+	acpi_dev_for_each_child_reverse(adev, acpi_scan_check_and_detach, p);
+
+	if (flags & ACPI_SCAN_CHECK_FLAG_STATUS) {
+		acpi_bus_get_status(adev);
+		/*
+		 * Skip devices that are still there and take the enabled
+		 * flag into account.
+		 */
+		if (acpi_device_is_enabled(adev))
+			return 0;
+
+		/* Skip device that have not been enumerated. */
+		if (!acpi_device_enumerated(adev)) {
+			dev_dbg(&adev->dev, "Still not enumerated\n");
+			return 0;
+		}
+	}
+
+	adev->flags.match_driver = false;
+	if (handler) {
+		if (handler->detach)
+			handler->detach(adev);
+	} else {
+		device_release_driver(&adev->dev);
+	}
+	/*
+	 * Most likely, the device is going away, so put it into D3cold before
+	 * that.
+	 */
+	acpi_device_set_power(adev, ACPI_STATE_D3_COLD);
+	adev->flags.initialized = false;
+
+	/* For eject this is deferred to acpi_bus_post_eject() */
+	if (!(flags & ACPI_SCAN_CHECK_FLAG_EJECT)) {
+		adev->handler = NULL;
+		acpi_device_clear_enumerated(adev);
+	}
+	return 0;
+}
+
+static int acpi_bus_post_eject(struct acpi_device *adev, void *not_used)
+{
+	struct acpi_scan_handler *handler = adev->handler;
+
+	acpi_dev_for_each_child_reverse(adev, acpi_bus_post_eject, NULL);
+
+	if (handler) {
+		if (handler->post_eject)
+			handler->post_eject(adev);
+
+		adev->handler = NULL;
+	}
+
+	acpi_device_clear_enumerated(adev);
+
+	return 0;
+}
+
+static void acpi_scan_check_subtree(struct acpi_device *adev)
+{
+	uintptr_t flags = ACPI_SCAN_CHECK_FLAG_STATUS;
+
+	acpi_scan_check_and_detach(adev, (void *)flags);
+}
+
 static int acpi_scan_hot_remove(struct acpi_device *device)
 {
 	acpi_handle handle = device->handle;
 	unsigned long long sta;
 	acpi_status status;
+	uintptr_t flags = ACPI_SCAN_CHECK_FLAG_EJECT;
 
 	if (device->handler && device->handler->hotplug.demand_offline) {
 		if (!acpi_scan_is_offline(device, true))
@@ -262,7 +335,7 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
 
 	acpi_handle_debug(handle, "Ejecting\n");
 
-	acpi_bus_trim(device);
+	acpi_scan_check_and_detach(device, (void *)flags);
 
 	acpi_evaluate_lck(handle, 0);
 	/*
@@ -285,80 +358,69 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
 	} else if (sta & ACPI_STA_DEVICE_ENABLED) {
 		acpi_handle_warn(handle,
 			"Eject incomplete - status 0x%llx\n", sta);
+	} else {
+		acpi_bus_post_eject(device, NULL);
 	}
 
 	return 0;
 }
 
-static int acpi_scan_device_not_present(struct acpi_device *adev)
+static int acpi_scan_rescan_bus(struct acpi_device *adev)
 {
-	if (!acpi_device_enumerated(adev)) {
-		dev_warn(&adev->dev, "Still not present\n");
-		return -EALREADY;
-	}
-	acpi_bus_trim(adev);
-	return 0;
+	struct acpi_scan_handler *handler = adev->handler;
+	int ret;
+
+	if (handler && handler->hotplug.scan_dependent)
+		ret = handler->hotplug.scan_dependent(adev);
+	else
+		ret = acpi_bus_scan(adev->handle);
+
+	if (ret)
+		dev_info(&adev->dev, "Namespace scan failure\n");
+
+	return ret;
 }
 
 static int acpi_scan_device_check(struct acpi_device *adev)
 {
-	int error;
+	struct acpi_device *parent;
 
-	acpi_bus_get_status(adev);
-	if (adev->status.present || adev->status.functional) {
-		/*
-		 * This function is only called for device objects for which
-		 * matching scan handlers exist.  The only situation in which
-		 * the scan handler is not attached to this device object yet
-		 * is when the device has just appeared (either it wasn't
-		 * present at all before or it was removed and then added
-		 * again).
-		 */
-		if (adev->handler) {
-			dev_warn(&adev->dev, "Already enumerated\n");
-			return -EALREADY;
-		}
-		error = acpi_bus_scan(adev->handle);
-		if (error) {
-			dev_warn(&adev->dev, "Namespace scan failure\n");
-			return error;
-		}
-		if (!adev->handler) {
-			dev_warn(&adev->dev, "Enumeration failure\n");
-			error = -ENODEV;
-		}
-	} else {
-		error = acpi_scan_device_not_present(adev);
-	}
-	return error;
-}
+	acpi_scan_check_subtree(adev);
 
-static int acpi_scan_bus_check(struct acpi_device *adev, void *not_used)
-{
-	struct acpi_scan_handler *handler = adev->handler;
-	int error;
+	if (!acpi_device_is_present(adev))
+		return 0;
 
-	acpi_bus_get_status(adev);
-	if (!(adev->status.present || adev->status.functional)) {
-		acpi_scan_device_not_present(adev);
+	/*
+	 * This function is only called for device objects for which matching
+	 * scan handlers exist.  The only situation in which the scan handler
+	 * is not attached to this device object yet is when the device has
+	 * just appeared (either it wasn't present at all before or it was
+	 * removed and then added again).
+	 */
+	if (adev->handler) {
+		dev_dbg(&adev->dev, "Already enumerated\n");
 		return 0;
 	}
-	if (handler && handler->hotplug.scan_dependent)
-		return handler->hotplug.scan_dependent(adev);
 
-	error = acpi_bus_scan(adev->handle);
-	if (error) {
-		dev_warn(&adev->dev, "Namespace scan failure\n");
-		return error;
-	}
-	return acpi_dev_for_each_child(adev, acpi_scan_bus_check, NULL);
+	parent = acpi_dev_parent(adev);
+	if (!parent)
+		parent = adev;
+
+	return acpi_scan_rescan_bus(parent);
+}
+
+static int acpi_scan_bus_check(struct acpi_device *adev)
+{
+	acpi_scan_check_subtree(adev);
+
+	return acpi_scan_rescan_bus(adev);
 }
 
 static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type)
 {
 	switch (type) {
 	case ACPI_NOTIFY_BUS_CHECK:
-		return acpi_scan_bus_check(adev, NULL);
+		return acpi_scan_bus_check(adev);
 	case ACPI_NOTIFY_DEVICE_CHECK:
 		return acpi_scan_device_check(adev);
 	case ACPI_NOTIFY_EJECT_REQUEST:
@@ -395,7 +457,7 @@ void acpi_device_hotplug(struct acpi_device *adev, u32 src)
 	} else if (adev->flags.hotplug_notify) {
 		error = acpi_generic_hotplug_event(adev, src);
 	} else {
-		int (*notify)(struct acpi_device *, u32);
+		acpi_hp_notify notify;
 
 		acpi_lock_hp_context();
 		notify = adev->hp ? adev->hp->notify : NULL;
@@ -662,10 +724,8 @@ int acpi_tie_acpi_dev(struct acpi_device *adev)
 static void acpi_store_pld_crc(struct acpi_device *adev)
 {
 	struct acpi_pld_info *pld;
-	acpi_status status;
 
-	status = acpi_get_physical_device_location(adev->handle, &pld);
-	if (ACPI_FAILURE(status))
+	if (!acpi_get_physical_device_location(adev->handle, &pld))
 		return;
 
 	adev->pld_crc = crc32(~0, pld, sizeof(*pld));
@@ -734,10 +794,7 @@ int acpi_device_add(struct acpi_device *device)
 		goto err;
 	}
 
-	result = acpi_device_setup_files(device);
-	if (result)
-		pr_err("Error creating sysfs interface for device %s\n",
-		       dev_name(&device->dev));
+	acpi_device_setup_files(device);
 
 	return 0;
 
@@ -789,6 +846,8 @@ static bool acpi_info_matches_ids(struct acpi_device_info *info,
 static const char * const acpi_ignore_dep_ids[] = {
 	"PNP0D80", /* Windows-compatible System Power Management Controller */
 	"INT33BD", /* Intel Baytrail Mailbox Device */
+	"INTC10DE", /* Intel CVS LNL */
+	"INTC10E0", /* Intel CVS ARL */
 	"LATT2021", /* Lattice FW Update Client Driver */
 	NULL
 };
@@ -796,6 +855,15 @@ static const char * const acpi_ignore_dep_ids[] = {
 /* List of HIDs for which we honor deps of matching ACPI devs, when checking _DEP lists. */
 static const char * const acpi_honor_dep_ids[] = {
 	"INT3472", /* Camera sensor PMIC / clk and regulator info */
+	"INTC1059", /* IVSC (TGL) driver must be loaded to allow i2c access to camera sensors */
+	"INTC1095", /* IVSC (ADL) driver must be loaded to allow i2c access to camera sensors */
+	"INTC100A", /* IVSC (RPL) driver must be loaded to allow i2c access to camera sensors */
+	"INTC10CF", /* IVSC (MTL) driver must be loaded to allow i2c access to camera sensors */
+	"RSCV0001", /* RISC-V PLIC */
+	"RSCV0002", /* RISC-V APLIC */
+	"RSCV0005", /* RISC-V SBI MPXY MBOX */
+	"RSCV0006", /* RISC-V RPMI SYSMSI */
+	"PNP0C0F",  /* PCI Link Device */
 	NULL
 };
 
@@ -930,26 +998,29 @@ static int acpi_bus_extract_wakeup_device_power_package(struct acpi_device *dev)
 	return err;
 }
 
+/* Do not use a button for S5 wakeup */
+#define ACPI_AVOID_WAKE_FROM_S5		BIT(0)
+
 static bool acpi_wakeup_gpe_init(struct acpi_device *device)
 {
 	static const struct acpi_device_id button_device_ids[] = {
-		{"PNP0C0C", 0},		/* Power button */
-		{"PNP0C0D", 0},		/* Lid */
-		{"PNP0C0E", 0},		/* Sleep button */
+		{"PNP0C0C", 0},				/* Power button */
+		{"PNP0C0D", ACPI_AVOID_WAKE_FROM_S5},	/* Lid */
+		{"PNP0C0E", ACPI_AVOID_WAKE_FROM_S5},	/* Sleep button */
 		{"", 0},
 	};
 	struct acpi_device_wakeup *wakeup = &device->wakeup;
+	const struct acpi_device_id *match;
 	acpi_status status;
 
 	wakeup->flags.notifier_present = 0;
 
 	/* Power button, Lid switch always enable wakeup */
-	if (!acpi_match_device_ids(device, button_device_ids)) {
-		if (!acpi_match_device_ids(device, &button_device_ids[1])) {
-			/* Do not use Lid/sleep button for S5 wakeup */
-			if (wakeup->sleep_state == ACPI_STATE_S5)
-				wakeup->sleep_state = ACPI_STATE_S4;
-		}
+	match = acpi_match_acpi_device(button_device_ids, device);
+	if (match) {
+		if ((match->driver_data & ACPI_AVOID_WAKE_FROM_S5) &&
+		    wakeup->sleep_state == ACPI_STATE_S5)
+			wakeup->sleep_state = ACPI_STATE_S4;
 		acpi_mark_gpe_for_wake(wakeup->gpe_device, wakeup->gpe_number);
 		device_set_wakeup_capable(&device->dev, true);
 		return true;
@@ -1111,19 +1182,19 @@ static void acpi_device_get_busid(struct acpi_device *device)
 	 * TBD: Shouldn't this value be unique (within the ACPI namespace)?
 	 */
 	if (!acpi_dev_parent(device)) {
-		strcpy(device->pnp.bus_id, "ACPI");
+		strscpy(device->pnp.bus_id, "ACPI");
 		return;
 	}
 
 	switch (device->device_type) {
 	case ACPI_BUS_TYPE_POWER_BUTTON:
-		strcpy(device->pnp.bus_id, "PWRF");
+		strscpy(device->pnp.bus_id, "PWRF");
 		break;
 	case ACPI_BUS_TYPE_SLEEP_BUTTON:
-		strcpy(device->pnp.bus_id, "SLPF");
+		strscpy(device->pnp.bus_id, "SLPF");
 		break;
 	case ACPI_BUS_TYPE_ECDT_EC:
-		strcpy(device->pnp.bus_id, "ECDT");
+		strscpy(device->pnp.bus_id, "ECDT");
 		break;
 	default:
 		acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer);
@@ -1134,7 +1205,7 @@ static void acpi_device_get_busid(struct acpi_device *device)
 			else
 				break;
 		}
-		strcpy(device->pnp.bus_id, bus_id);
+		strscpy(device->pnp.bus_id, bus_id);
 		break;
 	}
 }
@@ -1258,10 +1329,10 @@ const char *acpi_device_hid(struct acpi_device *device)
 {
 	struct acpi_hardware_id *hid;
 
-	if (list_empty(&device->pnp.ids))
+	hid = list_first_entry_or_null(&device->pnp.ids, struct acpi_hardware_id, list);
+	if (!hid)
 		return dummy_hid;
 
-	hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list);
 	return hid->id;
 }
 EXPORT_SYMBOL(acpi_device_hid);
@@ -1385,8 +1456,8 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
 			 acpi_object_is_system_bus(handle)) {
 			/* \_SB, \_TZ, LNXSYBUS */
 			acpi_add_id(pnp, ACPI_BUS_HID);
-			strcpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
-			strcpy(pnp->device_class, ACPI_BUS_CLASS);
+			strscpy(pnp->device_name, ACPI_BUS_DEVICE_NAME);
+			strscpy(pnp->device_class, ACPI_BUS_CLASS);
 		}
 
 		break;
@@ -1527,7 +1598,6 @@ int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map)
 			r->cpu_start = rentry->res->start;
 			r->dma_start = rentry->res->start - rentry->offset;
 			r->size = resource_size(rentry->res);
-			r->offset = rentry->offset;
 			r++;
 		}
 	}
@@ -1539,72 +1609,51 @@ int acpi_dma_get_range(struct device *dev, const struct bus_dma_region **map)
 
 #ifdef CONFIG_IOMMU_API
 int acpi_iommu_fwspec_init(struct device *dev, u32 id,
-			   struct fwnode_handle *fwnode,
-			   const struct iommu_ops *ops)
+			   struct fwnode_handle *fwnode)
 {
-	int ret = iommu_fwspec_init(dev, fwnode, ops);
-
-	if (!ret)
-		ret = iommu_fwspec_add_ids(dev, &id, 1);
-
-	return ret;
-}
+	int ret;
 
-static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev)
-{
-	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+	ret = iommu_fwspec_init(dev, fwnode);
+	if (ret)
+		return ret;
 
-	return fwspec ? fwspec->ops : NULL;
+	return iommu_fwspec_add_ids(dev, &id, 1);
 }
 
-static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
-						       const u32 *id_in)
+static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in)
 {
 	int err;
-	const struct iommu_ops *ops;
 
-	/*
-	 * If we already translated the fwspec there is nothing left to do,
-	 * return the iommu_ops.
-	 */
-	ops = acpi_iommu_fwspec_ops(dev);
-	if (ops)
-		return ops;
+	/* Serialise to make dev->iommu stable under our potential fwspec */
+	mutex_lock(&iommu_probe_device_lock);
+	/* If we already translated the fwspec there is nothing left to do */
+	if (dev_iommu_fwspec_get(dev)) {
+		mutex_unlock(&iommu_probe_device_lock);
+		return 0;
+	}
 
 	err = iort_iommu_configure_id(dev, id_in);
 	if (err && err != -EPROBE_DEFER)
+		err = rimt_iommu_configure_id(dev, id_in);
+	if (err && err != -EPROBE_DEFER)
 		err = viot_iommu_configure(dev);
 
-	/*
-	 * If we have reason to believe the IOMMU driver missed the initial
-	 * iommu_probe_device() call for dev, replay it to get things in order.
-	 */
-	if (!err && dev->bus && !device_iommu_mapped(dev))
-		err = iommu_probe_device(dev);
+	mutex_unlock(&iommu_probe_device_lock);
 
-	/* Ignore all other errors apart from EPROBE_DEFER */
-	if (err == -EPROBE_DEFER) {
-		return ERR_PTR(err);
-	} else if (err) {
-		dev_dbg(dev, "Adding to IOMMU failed: %d\n", err);
-		return NULL;
-	}
-	return acpi_iommu_fwspec_ops(dev);
+	return err;
 }
 
 #else /* !CONFIG_IOMMU_API */
 
 int acpi_iommu_fwspec_init(struct device *dev, u32 id,
-			   struct fwnode_handle *fwnode,
-			   const struct iommu_ops *ops)
+			   struct fwnode_handle *fwnode)
 {
 	return -ENODEV;
 }
 
-static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
-						       const u32 *id_in)
+static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in)
 {
-	return NULL;
+	return -ENODEV;
 }
 
 #endif /* !CONFIG_IOMMU_API */
@@ -1618,7 +1667,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev,
 int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
 			  const u32 *input_id)
 {
-	const struct iommu_ops *iommu;
+	int ret;
 
 	if (attr == DEV_DMA_NOT_SUPPORTED) {
 		set_dma_ops(dev, &dma_dummy_ops);
@@ -1627,12 +1676,14 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr,
 
 	acpi_arch_dma_setup(dev);
 
-	iommu = acpi_iommu_configure_id(dev, input_id);
-	if (PTR_ERR(iommu) == -EPROBE_DEFER)
+	/* Ignore all other errors apart from EPROBE_DEFER */
+	ret = acpi_iommu_configure_id(dev, input_id);
+	if (ret == -EPROBE_DEFER)
 		return -EPROBE_DEFER;
+	if (ret)
+		dev_dbg(dev, "Adding to IOMMU failed: %d\n", ret);
 
-	arch_setup_dma_ops(dev, 0, U64_MAX,
-				iommu, attr == DEV_DMA_COHERENT);
+	arch_setup_dma_ops(dev, attr == DEV_DMA_COHERENT);
 
 	return 0;
 }
@@ -1712,8 +1763,12 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
 		{"BSG1160", },
 		{"BSG2150", },
 		{"CSC3551", },
+		{"CSC3554", },
+		{"CSC3556", },
+		{"CSC3557", },
 		{"INT33FE", },
 		{"INT3515", },
+		{"TXNW2781", },
 		/* Non-conforming _HID for Cirrus Logic already released */
 		{"CLSA0100", },
 		{"CLSA0101", },
@@ -1721,6 +1776,7 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
 	 * Some ACPI devs contain SerialBus resources even though they are not
 	 * attached to a serial bus at all.
 	 */
+		{ACPI_VIDEO_HID, },
 		{"MSHW0028", },
 	/*
 	 * HIDs of device with an UartSerialBusV2 resource for which userspace
@@ -1766,6 +1822,7 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
 	device->dev.parent = parent ? &parent->dev : NULL;
 	device->dev.release = release;
 	device->dev.bus = &acpi_bus_type;
+	device->dev.groups = acpi_groups;
 	fwnode_init(&device->fwnode, &acpi_device_fwnode_ops);
 	acpi_set_device_status(device, ACPI_STA_DEFAULT);
 	acpi_device_get_busid(device);
@@ -1791,7 +1848,8 @@ static void acpi_scan_dep_init(struct acpi_device *adev)
 			if (dep->honor_dep)
 				adev->flags.honor_deps = 1;
 
-			adev->dep_unmet++;
+			if (!dep->met)
+				adev->dep_unmet++;
 		}
 	}
 }
@@ -1907,6 +1965,11 @@ bool acpi_device_is_present(const struct acpi_device *adev)
 	return adev->status.present || adev->status.functional;
 }
 
+bool acpi_device_is_enabled(const struct acpi_device *adev)
+{
+	return adev->status.enabled;
+}
+
 static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler,
 				       const char *idstr,
 				       const struct acpi_device_id **matchid)
@@ -1951,54 +2014,18 @@ void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val)
 	mutex_unlock(&acpi_scan_lock);
 }
 
-static void acpi_scan_init_hotplug(struct acpi_device *adev)
+int acpi_scan_add_dep(acpi_handle handle, struct acpi_handle_list *dep_devices)
 {
-	struct acpi_hardware_id *hwid;
-
-	if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) {
-		acpi_dock_add(adev);
-		return;
-	}
-	list_for_each_entry(hwid, &adev->pnp.ids, list) {
-		struct acpi_scan_handler *handler;
-
-		handler = acpi_scan_match_handler(hwid->id, NULL);
-		if (handler) {
-			adev->flags.hotplug_notify = true;
-			break;
-		}
-	}
-}
-
-static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep)
-{
-	struct acpi_handle_list dep_devices;
-	acpi_status status;
 	u32 count;
 	int i;
 
-	/*
-	 * Check for _HID here to avoid deferring the enumeration of:
-	 * 1. PCI devices.
-	 * 2. ACPI nodes describing USB ports.
-	 * Still, checking for _HID catches more then just these cases ...
-	 */
-	if (!check_dep || !acpi_has_method(handle, "_DEP") ||
-	    !acpi_has_method(handle, "_HID"))
-		return 0;
-
-	status = acpi_evaluate_reference(handle, "_DEP", NULL, &dep_devices);
-	if (ACPI_FAILURE(status)) {
-		acpi_handle_debug(handle, "Failed to evaluate _DEP.\n");
-		return 0;
-	}
-
-	for (count = 0, i = 0; i < dep_devices.count; i++) {
+	for (count = 0, i = 0; i < dep_devices->count; i++) {
 		struct acpi_device_info *info;
 		struct acpi_dep_data *dep;
 		bool skip, honor_dep;
+		acpi_status status;
 
-		status = acpi_get_object_info(dep_devices.handles[i], &info);
+		status = acpi_get_object_info(dep_devices->handles[i], &info);
 		if (ACPI_FAILURE(status)) {
 			acpi_handle_debug(handle, "Error reading _DEP device info\n");
 			continue;
@@ -2017,21 +2044,79 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep)
 
 		count++;
 
-		dep->supplier = dep_devices.handles[i];
+		dep->supplier = dep_devices->handles[i];
 		dep->consumer = handle;
 		dep->honor_dep = honor_dep;
 
 		mutex_lock(&acpi_dep_list_lock);
-		list_add_tail(&dep->node , &acpi_dep_list);
+		list_add_tail(&dep->node, &acpi_dep_list);
 		mutex_unlock(&acpi_dep_list_lock);
 	}
 
+	acpi_handle_list_free(dep_devices);
 	return count;
 }
 
-static bool acpi_bus_scan_second_pass;
+static void acpi_scan_init_hotplug(struct acpi_device *adev)
+{
+	struct acpi_hardware_id *hwid;
+
+	if (acpi_dock_match(adev->handle) || is_ejectable_bay(adev)) {
+		acpi_dock_add(adev);
+		return;
+	}
+	list_for_each_entry(hwid, &adev->pnp.ids, list) {
+		struct acpi_scan_handler *handler;
+
+		handler = acpi_scan_match_handler(hwid->id, NULL);
+		if (handler) {
+			adev->flags.hotplug_notify = true;
+			break;
+		}
+	}
+}
+
+u32 __weak arch_acpi_add_auto_dep(acpi_handle handle) { return 0; }
 
-static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep,
+static u32 acpi_scan_check_dep(acpi_handle handle)
+{
+	struct acpi_handle_list dep_devices;
+	u32 count = 0;
+
+	/*
+	 * Some architectures like RISC-V need to add dependencies for
+	 * all devices which use GSI to the interrupt controller so that
+	 * interrupt controller is probed before any of those devices.
+	 * Instead of mandating _DEP on all the devices, detect the
+	 * dependency and add automatically.
+	 */
+	count += arch_acpi_add_auto_dep(handle);
+
+	/*
+	 * Check for _HID here to avoid deferring the enumeration of:
+	 * 1. PCI devices.
+	 * 2. ACPI nodes describing USB ports.
+	 * Still, checking for _HID catches more then just these cases ...
+	 */
+	if (!acpi_has_method(handle, "_DEP") || !acpi_has_method(handle, "_HID"))
+		return count;
+
+	if (!acpi_evaluate_reference(handle, "_DEP", NULL, &dep_devices)) {
+		acpi_handle_debug(handle, "Failed to evaluate _DEP.\n");
+		return count;
+	}
+
+	count += acpi_scan_add_dep(handle, &dep_devices);
+	return count;
+}
+
+static acpi_status acpi_scan_check_crs_csi2_cb(acpi_handle handle, u32 a, void *b, void **c)
+{
+	acpi_mipi_check_crs_csi2(handle);
+	return AE_OK;
+}
+
+static acpi_status acpi_bus_check_add(acpi_handle handle, bool first_pass,
 				      struct acpi_device **adev_p)
 {
 	struct acpi_device *device = acpi_fetch_acpi_dev(handle);
@@ -2049,10 +2134,24 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep,
 		if (acpi_device_should_be_hidden(handle))
 			return AE_OK;
 
-		/* Bail out if there are dependencies. */
-		if (acpi_scan_check_dep(handle, check_dep) > 0) {
-			acpi_bus_scan_second_pass = true;
-			return AE_CTRL_DEPTH;
+		if (first_pass) {
+			acpi_mipi_check_crs_csi2(handle);
+
+			/* Bail out if there are dependencies. */
+			if (acpi_scan_check_dep(handle) > 0) {
+				/*
+				 * The entire CSI-2 connection graph needs to be
+				 * extracted before any drivers or scan handlers
+				 * are bound to struct device objects, so scan
+				 * _CRS CSI-2 resource descriptors for all
+				 * devices below the current handle.
+				 */
+				acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
+						    ACPI_UINT32_MAX,
+						    acpi_scan_check_crs_csi2_cb,
+						    NULL, NULL, NULL);
+				return AE_CTRL_DEPTH;
+			}
 		}
 
 		fallthrough;
@@ -2076,10 +2175,10 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep,
 	}
 
 	/*
-	 * If check_dep is true at this point, the device has no dependencies,
+	 * If first_pass is true at this point, the device has no dependencies,
 	 * or the creation of the device object would have been postponed above.
 	 */
-	acpi_add_single_object(&device, handle, type, !check_dep);
+	acpi_add_single_object(&device, handle, type, !first_pass);
 	if (!device)
 		return AE_CTRL_DEPTH;
 
@@ -2194,6 +2293,8 @@ static int acpi_bus_attach(struct acpi_device *device, void *first_pass)
 	if (device->handler)
 		goto ok;
 
+	acpi_ec_register_opregions(device);
+
 	if (!device->flags.initialized) {
 		device->flags.power_manageable =
 			device->power.states[ACPI_STATE_D0].flags.valid;
@@ -2296,11 +2397,17 @@ static bool acpi_scan_clear_dep_queue(struct acpi_device *adev)
 	 * initial enumeration of devices is complete, put it into the unbound
 	 * workqueue.
 	 */
-	queue_work(system_unbound_wq, &cdw->work);
+	queue_work(system_dfl_wq, &cdw->work);
 
 	return true;
 }
 
+static void acpi_scan_delete_dep_data(struct acpi_dep_data *dep)
+{
+	list_del(&dep->node);
+	kfree(dep);
+}
+
 static int acpi_scan_clear_dep(struct acpi_dep_data *dep, void *data)
 {
 	struct acpi_device *adev = acpi_get_acpi_dev(dep->consumer);
@@ -2311,8 +2418,10 @@ static int acpi_scan_clear_dep(struct acpi_dep_data *dep, void *data)
 			acpi_dev_put(adev);
 	}
 
-	list_del(&dep->node);
-	kfree(dep);
+	if (dep->free_when_met)
+		acpi_scan_delete_dep_data(dep);
+	else
+		dep->met = true;
 
 	return 0;
 }
@@ -2406,6 +2515,62 @@ struct acpi_device *acpi_dev_get_next_consumer_dev(struct acpi_device *supplier,
 }
 EXPORT_SYMBOL_GPL(acpi_dev_get_next_consumer_dev);
 
+static void acpi_scan_postponed_branch(acpi_handle handle)
+{
+	struct acpi_device *adev = NULL;
+
+	if (ACPI_FAILURE(acpi_bus_check_add(handle, false, &adev)))
+		return;
+
+	acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
+			    acpi_bus_check_add_2, NULL, NULL, (void **)&adev);
+
+	/*
+	 * Populate the ACPI _CRS CSI-2 software nodes for the ACPI devices that
+	 * have been added above.
+	 */
+	acpi_mipi_init_crs_csi2_swnodes();
+
+	acpi_bus_attach(adev, NULL);
+}
+
+static void acpi_scan_postponed(void)
+{
+	struct acpi_dep_data *dep, *tmp;
+
+	mutex_lock(&acpi_dep_list_lock);
+
+	list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) {
+		acpi_handle handle = dep->consumer;
+
+		/*
+		 * In case there are multiple acpi_dep_list entries with the
+		 * same consumer, skip the current entry if the consumer device
+		 * object corresponding to it is present already.
+		 */
+		if (!acpi_fetch_acpi_dev(handle)) {
+			/*
+			 * Even though the lock is released here, tmp is
+			 * guaranteed to be valid, because none of the list
+			 * entries following dep is marked as "free when met"
+			 * and so they cannot be deleted.
+			 */
+			mutex_unlock(&acpi_dep_list_lock);
+
+			acpi_scan_postponed_branch(handle);
+
+			mutex_lock(&acpi_dep_list_lock);
+		}
+
+		if (dep->met)
+			acpi_scan_delete_dep_data(dep);
+		else
+			dep->free_when_met = true;
+	}
+
+	mutex_unlock(&acpi_dep_list_lock);
+}
+
 /**
  * acpi_bus_scan - Add ACPI device node objects in a given namespace scope.
  * @handle: Root of the namespace scope to scan.
@@ -2424,8 +2589,6 @@ int acpi_bus_scan(acpi_handle handle)
 {
 	struct acpi_device *device = NULL;
 
-	acpi_bus_scan_second_pass = false;
-
 	/* Pass 1: Avoid enumerating devices with missing dependencies. */
 
 	if (ACPI_SUCCESS(acpi_bus_check_add(handle, true, &device)))
@@ -2436,52 +2599,26 @@ int acpi_bus_scan(acpi_handle handle)
 	if (!device)
 		return -ENODEV;
 
-	acpi_bus_attach(device, (void *)true);
+	/*
+	 * Set up ACPI _CRS CSI-2 software nodes using information extracted
+	 * from the _CRS CSI-2 resource descriptors during the ACPI namespace
+	 * walk above and MIPI DisCo for Imaging device properties.
+	 */
+	acpi_mipi_scan_crs_csi2();
+	acpi_mipi_init_crs_csi2_swnodes();
 
-	if (!acpi_bus_scan_second_pass)
-		return 0;
+	acpi_bus_attach(device, (void *)true);
 
 	/* Pass 2: Enumerate all of the remaining devices. */
 
-	device = NULL;
+	acpi_scan_postponed();
 
-	if (ACPI_SUCCESS(acpi_bus_check_add(handle, false, &device)))
-		acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
-				    acpi_bus_check_add_2, NULL, NULL,
-				    (void **)&device);
-
-	acpi_bus_attach(device, NULL);
+	acpi_mipi_crs_csi2_cleanup();
 
 	return 0;
 }
 EXPORT_SYMBOL(acpi_bus_scan);
 
-static int acpi_bus_trim_one(struct acpi_device *adev, void *not_used)
-{
-	struct acpi_scan_handler *handler = adev->handler;
-
-	acpi_dev_for_each_child_reverse(adev, acpi_bus_trim_one, NULL);
-
-	adev->flags.match_driver = false;
-	if (handler) {
-		if (handler->detach)
-			handler->detach(adev);
-
-		adev->handler = NULL;
-	} else {
-		device_release_driver(&adev->dev);
-	}
-	/*
-	 * Most likely, the device is going away, so put it into D3cold before
-	 * that.
-	 */
-	acpi_device_set_power(adev, ACPI_STATE_D3_COLD);
-	adev->flags.initialized = false;
-	acpi_device_clear_enumerated(adev);
-
-	return 0;
-}
-
 /**
  * acpi_bus_trim - Detach scan handlers and drivers from ACPI device objects.
  * @adev: Root of the ACPI namespace scope to walk.
@@ -2490,7 +2627,9 @@ static int acpi_bus_trim_one(struct acpi_device *adev, void *not_used)
  */
 void acpi_bus_trim(struct acpi_device *adev)
 {
-	acpi_bus_trim_one(adev, NULL);
+	uintptr_t flags = 0;
+
+	acpi_scan_check_and_detach(adev, (void *)flags);
 }
 EXPORT_SYMBOL_GPL(acpi_bus_trim);
 
@@ -2571,8 +2710,7 @@ void __init acpi_scan_init(void)
 	acpi_memory_hotplug_init();
 	acpi_watchdog_init();
 	acpi_pnp_init();
-	acpi_int340x_thermal_init();
-	acpi_amba_init();
+	acpi_power_resources_init();
 	acpi_init_lpit();
 
 	acpi_scan_add_handler(&generic_device_handler);
@@ -2639,6 +2777,8 @@ static int __init acpi_match_madt(union acpi_subtable_headers *header,
 	return 0;
 }
 
+void __weak arch_sort_irqchip_probe(struct acpi_probe_entry *ap_head, int nr) { }
+
 int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr)
 {
 	int count = 0;
@@ -2647,6 +2787,7 @@ int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr)
 		return 0;
 
 	mutex_lock(&acpi_probe_mutex);
+	arch_sort_irqchip_probe(ap_head, nr);
 	for (ape = ap_head; nr; ape++, nr--) {
 		if (ACPI_COMPARE_NAMESEG(ACPI_SIG_MADT, ape->id)) {
 			acpi_probe_count = 0;