More ACPI updates for 6.5-rc1

- Make acpi_companion_match() return a const pointer and update its
    callers accordingly (Andy Shevchenko).
 
  - Move the extern declaration of the acpi_root variable to a header
    file so as to address a compiler warning (Andy Shevchenko).
 
  - Address compiler warnings in the ACPI device enumeration code by
    adding a missing header file include to it (Ben Dooks).
 
  - Refine the SMB0001 quirk in the ACPI device enumeration code so as to
    address an i2c-scmi driver regression (Andy Shevchenko).
 
  - Clean up two pieces of the ACPI device enumeration code (Andy
    Shevchenko).
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Merge tag 'acpi-6.5-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI updates from Rafael Wysocki:
 "These fix a couple of compiler warnings, refine an ACPI device
  enumeration quirk to address a driver regression and clean up code.

  Specifics:

   - Make acpi_companion_match() return a const pointer and update its
     callers accordingly (Andy Shevchenko)

   - Move the extern declaration of the acpi_root variable to a header
     file so as to address a compiler warning (Andy Shevchenko)

   - Address compiler warnings in the ACPI device enumeration code by
     adding a missing header file include to it (Ben Dooks)

   - Refine the SMB0001 quirk in the ACPI device enumeration code so as
     to address an i2c-scmi driver regression (Andy Shevchenko)

   - Clean up two pieces of the ACPI device enumeration code (Andy
     Shevchenko)"

* tag 'acpi-6.5-rc1-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: scan: Use the acpi_match_acpi_device() helper
  ACPI: platform: Move SMB0001 HID to the header and reuse
  ACPI: platform: Ignore SMB0001 only when it has resources
  ACPI: bus: Introduce acpi_match_acpi_device() helper
  ACPI: scan: fix undeclared variable warnings by including sleep.h
  ACPI: bus: Constify acpi_companion_match() returned value
  ACPI: scan: Move acpi_root to internal header

drivers/acpi/acpi_platform.c

@@ -9,6 +9,7 @@
  */
 
 #include <linux/acpi.h>
+#include <linux/bits.h>
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
@@ -19,13 +20,16 @@
 
 #include "internal.h"
 
+/* Exclude devices that have no _CRS resources provided */
+#define ACPI_ALLOW_WO_RESOURCES		BIT(0)
+
 static const struct acpi_device_id forbidden_id_list[] = {
 	{"ACPI0009", 0},	/* IOxAPIC */
 	{"ACPI000A", 0},	/* IOAPIC */
 	{"PNP0000",  0},	/* PIC */
 	{"PNP0100",  0},	/* Timer */
 	{"PNP0200",  0},	/* AT DMA Controller */
-	{"SMB0001",  0},	/* ACPI SMBUS virtual device */
+	{ACPI_SMBUS_MS_HID,  ACPI_ALLOW_WO_RESOURCES},	/* ACPI SMBUS virtual device */
 	{ }
 };
 
@@ -83,6 +87,15 @@ static void acpi_platform_fill_resource(struct acpi_device *adev,
 		dest->parent = pci_find_resource(to_pci_dev(parent), dest);
 }
 
+static unsigned int acpi_platform_resource_count(struct acpi_resource *ares, void *data)
+{
+	bool *has_resources = data;
+
+	*has_resources = true;
+
+	return AE_CTRL_TERMINATE;
+}
+
 /**
  * acpi_create_platform_device - Create platform device for ACPI device node
  * @adev: ACPI device node to create a platform device for.
@@ -100,6 +113,7 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev,
 	struct acpi_device *parent = acpi_dev_parent(adev);
 	struct platform_device *pdev = NULL;
 	struct platform_device_info pdevinfo;
+	const struct acpi_device_id *match;
 	struct resource_entry *rentry;
 	struct list_head resource_list;
 	struct resource *resources = NULL;
@@ -109,8 +123,19 @@ struct platform_device *acpi_create_platform_device(struct acpi_device *adev,
 	if (adev->physical_node_count)
 		return NULL;
 
-	if (!acpi_match_device_ids(adev, forbidden_id_list))
-		return ERR_PTR(-EINVAL);
+	match = acpi_match_acpi_device(forbidden_id_list, adev);
+	if (match) {
+		if (match->driver_data & ACPI_ALLOW_WO_RESOURCES) {
+			bool has_resources = false;
+
+			acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
+					    acpi_platform_resource_count, &has_resources);
+			if (has_resources)
+				return ERR_PTR(-EINVAL);
+		} else {
+			return ERR_PTR(-EINVAL);
+		}
+	}
 
 	INIT_LIST_HEAD(&resource_list);
 	count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);

drivers/acpi/bus.c

@@ -682,7 +682,7 @@ bool acpi_device_is_first_physical_node(struct acpi_device *adev,
  * resources available from it but they will be matched normally using functions
  * provided by their bus types (and analogously for their modalias).
  */
-struct acpi_device *acpi_companion_match(const struct device *dev)
+const struct acpi_device *acpi_companion_match(const struct device *dev)
 {
 	struct acpi_device *adev;
 
@@ -706,7 +706,7 @@ struct acpi_device *acpi_companion_match(const struct device *dev)
  * identifiers and a _DSD object with the "compatible" property, use that
  * property to match against the given list of identifiers.
  */
-static bool acpi_of_match_device(struct acpi_device *adev,
+static bool acpi_of_match_device(const struct acpi_device *adev,
 				 const struct of_device_id *of_match_table,
 				 const struct of_device_id **of_id)
 {
@@ -808,7 +808,7 @@ static bool __acpi_match_device_cls(const struct acpi_device_id *id,
 	return true;
 }
 
-static bool __acpi_match_device(struct acpi_device *device,
+static bool __acpi_match_device(const struct acpi_device *device,
 				const struct acpi_device_id *acpi_ids,
 				const struct of_device_id *of_ids,
 				const struct acpi_device_id **acpi_id,
@@ -850,6 +850,26 @@ static bool __acpi_match_device(struct acpi_device *device,
 	return true;
 }
 
+/**
+ * acpi_match_acpi_device - Match an ACPI device against a given list of ACPI IDs
+ * @ids: Array of struct acpi_device_id objects to match against.
+ * @adev: The ACPI device pointer to match.
+ *
+ * Match the ACPI device @adev against a given list of ACPI IDs @ids.
+ *
+ * Return:
+ * a pointer to the first matching ACPI ID on success or %NULL on failure.
+ */
+const struct acpi_device_id *acpi_match_acpi_device(const struct acpi_device_id *ids,
+						    const struct acpi_device *adev)
+{
+	const struct acpi_device_id *id = NULL;
+
+	__acpi_match_device(adev, ids, NULL, &id, NULL);
+	return id;
+}
+EXPORT_SYMBOL_GPL(acpi_match_acpi_device);
+
 /**
  * acpi_match_device - Match a struct device against a given list of ACPI IDs
  * @ids: Array of struct acpi_device_id object to match against.
@@ -864,10 +884,7 @@ static bool __acpi_match_device(struct acpi_device *device,
 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 					       const struct device *dev)
 {
-	const struct acpi_device_id *id = NULL;
-
-	__acpi_match_device(acpi_companion_match(dev), ids, NULL, &id, NULL);
-	return id;
+	return acpi_match_acpi_device(ids, acpi_companion_match(dev));
 }
 EXPORT_SYMBOL_GPL(acpi_match_device);
 

drivers/acpi/device_sysfs.c

@@ -283,7 +283,7 @@ int acpi_device_uevent_modalias(const struct device *dev, struct kobj_uevent_env
 }
 EXPORT_SYMBOL_GPL(acpi_device_uevent_modalias);
 
-static int __acpi_device_modalias(struct acpi_device *adev, char *buf, int size)
+static int __acpi_device_modalias(const struct acpi_device *adev, char *buf, int size)
 {
 	int len, count;
 

drivers/acpi/internal.h

@@ -11,6 +11,8 @@
 
 #include <linux/idr.h>
 
+extern struct acpi_device *acpi_root;
+
 int early_acpi_osi_init(void);
 int acpi_osi_init(void);
 acpi_status acpi_os_initialize1(void);
@@ -119,7 +121,7 @@ int acpi_bus_register_early_device(int type);
 /* --------------------------------------------------------------------------
                      Device Matching and Notification
    -------------------------------------------------------------------------- */
-struct acpi_device *acpi_companion_match(const struct device *dev);
+const struct acpi_device *acpi_companion_match(const struct device *dev);
 int __acpi_device_uevent_modalias(const struct acpi_device *adev,
 				  struct kobj_uevent_env *env);
 

drivers/acpi/scan.c

@@ -23,8 +23,7 @@
 #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"
@@ -930,26 +929,29 @@ 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;

drivers/i2c/busses/i2c-scmi.c

@@ -13,9 +13,6 @@
 #include <linux/i2c.h>
 #include <linux/acpi.h>
 
-/* SMBUS HID definition as supported by Microsoft Windows */
-#define ACPI_SMBUS_MS_HID		"SMB0001"
-
 struct smbus_methods_t {
 	char *mt_info;
 	char *mt_sbr;

include/acpi/acpi_drivers.h

@@ -27,6 +27,8 @@
 #define ACPI_BAY_HID			"LNXIOBAY"
 #define ACPI_DOCK_HID			"LNXDOCK"
 #define ACPI_ECDT_HID			"LNXEC"
+/* SMBUS HID definition as supported by Microsoft Windows */
+#define ACPI_SMBUS_MS_HID		"SMB0001"
 /* Quirk for broken IBM BIOSes */
 #define ACPI_SMBUS_IBM_HID		"SMBUSIBM"
 

include/linux/acpi.h

@@ -707,6 +707,9 @@ extern int acpi_nvs_register(__u64 start, __u64 size);
 extern int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 				    void *data);
 
+const struct acpi_device_id *acpi_match_acpi_device(const struct acpi_device_id *ids,
+						    const struct acpi_device *adev);
+
 const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids,
 					       const struct device *dev);
 
@@ -922,6 +925,12 @@ static inline int acpi_nvs_for_each_region(int (*func)(__u64, __u64, void *),
 
 struct acpi_device_id;
 
+static inline const struct acpi_device_id *acpi_match_acpi_device(
+	const struct acpi_device_id *ids, const struct acpi_device *adev)
+{
+	return NULL;
+}
+
 static inline const struct acpi_device_id *acpi_match_device(
 	const struct acpi_device_id *ids, const struct device *dev)
 {