linux-kernel - [PATCH 5/10] ACPI / scan: introduce platform

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Date:	Fri, 30 May 2014 04:26:18 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	matthew.garrett@...ula.com, mika.westerberg@...ux.intel.com
Subject: [PATCH 5/10] ACPI / scan: introduce platform_id device PNP type flag

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Only certain types of ACPI device objects can be enumerated as
platform devices, so in order to distinguish them from the others
introduce a new ACPI device PNP type flag, platform_id, and set it
for devices with a valid _HID to start with.

This change is based on a Zhang Rui's prototype.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

---
drivers/acpi/scan.c     | 9 ++++++++-
 drivers/acpi/scan.c     |    4 +++-
 include/acpi/acpi_bus.h |    3 ++-
 2 files changed, 5 insertions(+), 2 deletions(-)

Index: linux-pm/drivers/acpi/scan.c
===================================================================
--- linux-pm.orig/drivers/acpi/scan.c
+++ linux-pm/drivers/acpi/scan.c
@@ -1797,8 +1797,10 @@ static void acpi_set_pnp_ids(acpi_handle
 			return;
 		}
 
-		if (info->valid & ACPI_VALID_HID)
+		if (info->valid & ACPI_VALID_HID) {
 			acpi_add_id(pnp, info->hardware_id.string);
+			pnp->type.platform_id = 1;
+		}
 		if (info->valid & ACPI_VALID_CID) {
 			cid_list = &info->compatible_id_list;
 			for (i = 0; i < cid_list->count; i++)
Index: linux-pm/include/acpi/acpi_bus.h
===================================================================
--- linux-pm.orig/include/acpi/acpi_bus.h
+++ linux-pm/include/acpi/acpi_bus.h
@@ -233,7 +233,8 @@ struct acpi_hardware_id {
 struct acpi_pnp_type {
 	u32 hardware_id:1;
 	u32 bus_address:1;
-	u32 reserved:30;
+	u32 platform_id:1;
+	u32 reserved:29;
 };
 
 struct acpi_device_pnp {

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