ACPI / platform: Use struct acpi_scan_handler for creating devices

Currently, the ACPI namespace scanning code creates platform device
objects for ACPI device nodes whose IDs match the contents of the
acpi_platform_device_ids[] table.  However, this adds a superfluous
special case into acpi_bus_device_attach() and makes it more
difficult to follow than it has to be.  It also will make it more
difficult to implement removal code for those platform device objects
in the future.

For the above reasons, introduce a struct acpi_scan_handler object
for creating platform devices and move the code related to that from
acpi_bus_device_attach() to the .attach() callback of that object.
Also move the acpi_platform_device_ids[] table to acpi_platform.c.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Acked-by: Toshi Kani <toshi.kani@hp.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>

1 files changed, 1 insertions, 29 deletions

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index c2821699bc49..a849d2430dff 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -29,27 +29,6 @@ extern struct acpi_device *acpi_root;
 
 static const char *dummy_hid = "device";
 
-/*
- * 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" },
-
-        /* Haswell LPSS devices */
-        { "INT33C0", ACPI_PLATFORM_CLK },
-        { "INT33C1", ACPI_PLATFORM_CLK },
-        { "INT33C2", ACPI_PLATFORM_CLK },
-        { "INT33C3", ACPI_PLATFORM_CLK },
-        { "INT33C4", ACPI_PLATFORM_CLK },
-        { "INT33C5", ACPI_PLATFORM_CLK },
-        { "INT33C6", ACPI_PLATFORM_CLK },
-        { "INT33C7", ACPI_PLATFORM_CLK },
-
-        { }
-};
-
 static LIST_HEAD(acpi_device_list);
 static LIST_HEAD(acpi_bus_id_list);
 static DEFINE_MUTEX(acpi_scan_lock);
@@ -1606,7 +1585,6 @@ static int acpi_scan_attach_handler(struct acpi_device *device)
 static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used,
                                           void *not_used, void **ret_not_used)
 {
-        const struct acpi_device_id *id;
         struct acpi_device *device;
         unsigned long long sta_not_used;
         int ret;
@@ -1621,13 +1599,6 @@ static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used,
         if (acpi_bus_get_device(handle, &device))
                 return AE_CTRL_DEPTH;
 
-        id = __acpi_match_device(device, acpi_platform_device_ids);
-        if (id) {
-                /* This is a known good platform device. */
-                acpi_create_platform_device(device, id->driver_data);
-                return AE_OK;
-        }
-
         ret = acpi_scan_attach_handler(device);
         if (ret)
                 return ret > 0 ? AE_OK : AE_CTRL_DEPTH;
@@ -1775,6 +1746,7 @@ int __init acpi_scan_init(void)
 
         acpi_pci_root_init();
         acpi_pci_link_init();
+        acpi_platform_init();
         acpi_csrt_init();
 
         /*