[PATCH V4 07/11] ACPI: use platform bus as the default bus for _HID enumeration

Zhang Rui
2014-03-17T07:50:18Z

Because of the growing demand for enumerating ACPI devices to platform bus,
this patch changes the code to enumerate ACPI devices with _HID to
platform bus by default, unless the device already has a scan handler attached.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
---
drivers/acpi/acpi_platform.c | 28 ----------------------------
drivers/acpi/scan.c | 12 ++++++------
2 files changed, 6 insertions(+), 34 deletions(-)

diff --git a/drivers/acpi/acpi_platform.c b/drivers/acpi/acpi_platform.c
index dbfe49e..33376a9 100644
--- a/drivers/acpi/acpi_platform.c
+++ b/drivers/acpi/acpi_platform.c
@@ -22,24 +22,6 @@

ACPI_MODULE_NAME("platform");

-/*
- * The following ACPI IDs are known to be suitable for representing as
- * platform devices.
- */
-static const struct acpi_device_id acpi_platform_device_ids[] = {
-
- { "PNP0D40" },
- { "ACPI0003" },
- { "VPC2004" },
- { "BCM4752" },
-
- /* Intel Smart Sound Technology */
- { "INT33C8" },
- { "80860F28" },
-
- { }
-};
-
/**
* acpi_create_platform_device - Create platform device for ACPI device node
* @adev: ACPI device node to create a platform device for.
@@ -125,13 +107,3 @@ int acpi_create_platform_device(struct acpi_device *adev,
kfree(resources);
return 1;
}
-
-static struct acpi_scan_handler platform_handler = {
- .ids = acpi_platform_device_ids,
- .attach = acpi_create_platform_device,
-};
-
-void __init acpi_platform_init(void)
-{
- acpi_scan_add_handler(&platform_handler);
-}
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index e41b5e6..c0456e7 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -2028,14 +2028,15 @@ static int acpi_scan_attach_handler(struct acpi_device *device)
handler = acpi_scan_match_handler(hwid->id, &devid);
if (handler) {
ret = handler->attach(device, devid);
- if (ret > 0) {
+ if (ret > 0)
device->handler = handler;
- break;
- } else if (ret < 0) {
- break;
- }
+ if (ret)
+ goto end;
}
}
+end:
+ if (device->pnp.type.platform_id && !device->handler)
+ acpi_create_platform_device(device, NULL);
return ret;
}

@@ -2191,7 +2192,6 @@ int __init acpi_scan_init(void)
acpi_pci_root_init();
acpi_pci_link_init();
acpi_processor_init();
- acpi_platform_init();
acpi_lpss_init();
acpi_cmos_rtc_init();
acpi_container_init();
--
1.7.9.5