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path: root/drivers/acpi/scan.c
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Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r--drivers/acpi/scan.c76
1 files changed, 67 insertions, 9 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 7efe546a8c42..f775fa0d850f 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -84,7 +84,7 @@ EXPORT_SYMBOL_GPL(acpi_initialize_hp_context);
int acpi_scan_add_handler(struct acpi_scan_handler *handler)
{
- if (!handler || !handler->attach)
+ if (!handler)
return -EINVAL;
list_add_tail(&handler->list_node, &acpi_scan_handlers_list);
@@ -1551,9 +1551,13 @@ static void acpi_bus_get_power_flags(struct acpi_device *device)
*/
if (acpi_has_method(device->handle, "_PSC"))
device->power.flags.explicit_get = 1;
+
if (acpi_has_method(device->handle, "_IRC"))
device->power.flags.inrush_current = 1;
+ if (acpi_has_method(device->handle, "_DSW"))
+ device->power.flags.dsw_present = 1;
+
/*
* Enumerate supported power management states
*/
@@ -1793,8 +1797,10 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp,
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++)
@@ -1973,6 +1979,9 @@ static bool acpi_scan_handler_matching(struct acpi_scan_handler *handler,
{
const struct acpi_device_id *devid;
+ if (handler->match)
+ return handler->match(idstr, matchid);
+
for (devid = handler->ids; devid->id[0]; devid++)
if (!strcmp((char *)devid->id, idstr)) {
if (matchid)
@@ -2061,6 +2070,44 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
return AE_OK;
}
+static int acpi_check_spi_i2c_slave(struct acpi_resource *ares, void *data)
+{
+ bool *is_spi_i2c_slave_p = data;
+
+ if (ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
+ return 1;
+
+ /*
+ * devices that are connected to UART still need to be enumerated to
+ * platform bus
+ */
+ if (ares->data.common_serial_bus.type != ACPI_RESOURCE_SERIAL_TYPE_UART)
+ *is_spi_i2c_slave_p = true;
+
+ /* no need to do more checking */
+ return -1;
+}
+
+static void acpi_default_enumeration(struct acpi_device *device)
+{
+ struct list_head resource_list;
+ bool is_spi_i2c_slave = false;
+
+ if (!device->pnp.type.platform_id || device->handler)
+ return;
+
+ /*
+ * Do not enemerate SPI/I2C slaves as they will be enuerated by their
+ * respective parents.
+ */
+ INIT_LIST_HEAD(&resource_list);
+ acpi_dev_get_resources(device, &resource_list, acpi_check_spi_i2c_slave,
+ &is_spi_i2c_slave);
+ acpi_dev_free_resource_list(&resource_list);
+ if (!is_spi_i2c_slave)
+ acpi_create_platform_device(device);
+}
+
static int acpi_scan_attach_handler(struct acpi_device *device)
{
struct acpi_hardware_id *hwid;
@@ -2072,6 +2119,10 @@ static int acpi_scan_attach_handler(struct acpi_device *device)
handler = acpi_scan_match_handler(hwid->id, &devid);
if (handler) {
+ if (!handler->attach) {
+ device->pnp.type.platform_id = 0;
+ continue;
+ }
device->handler = handler;
ret = handler->attach(device, devid);
if (ret > 0)
@@ -2082,6 +2133,9 @@ static int acpi_scan_attach_handler(struct acpi_device *device)
break;
}
}
+ if (!ret)
+ acpi_default_enumeration(device);
+
return ret;
}
@@ -2241,11 +2295,11 @@ 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();
acpi_memory_hotplug_init();
+ acpi_pnp_init();
mutex_lock(&acpi_scan_lock);
/*
@@ -2259,12 +2313,16 @@ int __init acpi_scan_init(void)
if (result)
goto out;
- result = acpi_bus_scan_fixed();
- if (result) {
- acpi_detach_data(acpi_root->handle, acpi_scan_drop_device);
- acpi_device_del(acpi_root);
- put_device(&acpi_root->dev);
- goto out;
+ /* Fixed feature devices do not exist on HW-reduced platform */
+ if (!acpi_gbl_reduced_hardware) {
+ result = acpi_bus_scan_fixed();
+ if (result) {
+ acpi_detach_data(acpi_root->handle,
+ acpi_scan_drop_device);
+ acpi_device_del(acpi_root);
+ put_device(&acpi_root->dev);
+ goto out;
+ }
}
acpi_update_all_gpes();