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Merge branch 'acpi-tables'

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* acpi-tables:
  ACPI: Rename configfs.c to acpi_configfs.c to prevent link error
  ACPI: add support for loading SSDTs via configfs
  ACPI: add support for configfs
  efi / ACPI: load SSTDs from EFI variables
  spi / ACPI: add support for ACPI reconfigure notifications
  i2c / ACPI: add support for ACPI reconfigure notifications
  ACPI: add support for ACPI reconfiguration notifiers
  ACPI / scan: fix enumeration (visited) flags for bus rescans
  ACPI / documentation: add SSDT overlays documentation
  ACPI: ARM64: support for ACPI_TABLE_UPGRADE
  ACPI / tables: introduce ARCH_HAS_ACPI_TABLE_UPGRADE
  ACPI / tables: move arch-specific symbol to asm/acpi.h
  ACPI / tables: table upgrade: refactor function definitions
  ACPI / tables: table upgrade: use cacheable map for tables

Conflicts:
	arch/arm64/include/asm/acpi.h
This commit is contained in:
Rafael J. Wysocki 2016-07-25 13:41:01 +02:00
commit d5f017b796
22 changed files with 972 additions and 83 deletions
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175
drivers/i2c/i2c-core.c
View file

@ -107,12 +107,11 @@ struct acpi_i2c_lookup {
acpi_handle device_handle;
};
static int acpi_i2c_find_address(struct acpi_resource *ares, void *data)
static int acpi_i2c_fill_info(struct acpi_resource *ares, void *data)
{
struct acpi_i2c_lookup *lookup = data;
struct i2c_board_info *info = lookup->info;
struct acpi_resource_i2c_serialbus *sb;
acpi_handle adapter_handle;
acpi_status status;
if (info->addr || ares->type != ACPI_RESOURCE_TYPE_SERIAL_BUS)
@ -122,80 +121,102 @@ static int acpi_i2c_find_address(struct acpi_resource *ares, void *data)
if (sb->type != ACPI_RESOURCE_SERIAL_TYPE_I2C)
return 1;
/*
* Extract the ResourceSource and make sure that the handle matches
* with the I2C adapter handle.
*/
status = acpi_get_handle(lookup->device_handle,
sb->resource_source.string_ptr,
&adapter_handle);
if (ACPI_SUCCESS(status) && adapter_handle == lookup->adapter_handle) {
info->addr = sb->slave_address;
if (sb->access_mode == ACPI_I2C_10BIT_MODE)
info->flags |= I2C_CLIENT_TEN;
}
&lookup->adapter_handle);
if (!ACPI_SUCCESS(status))
return 1;
info->addr = sb->slave_address;
if (sb->access_mode == ACPI_I2C_10BIT_MODE)
info->flags |= I2C_CLIENT_TEN;
return 1;
}
static acpi_status acpi_i2c_add_device(acpi_handle handle, u32 level,
void *data, void **return_value)
static int acpi_i2c_get_info(struct acpi_device *adev,
struct i2c_board_info *info,
acpi_handle *adapter_handle)
{
struct i2c_adapter *adapter = data;
struct list_head resource_list;
struct acpi_i2c_lookup lookup;
struct resource_entry *entry;
struct i2c_board_info info;
struct acpi_device *adev;
struct acpi_i2c_lookup lookup;
int ret;
if (acpi_bus_get_device(handle, &adev))
return AE_OK;
if (acpi_bus_get_status(adev) || !adev->status.present)
return AE_OK;
if (acpi_bus_get_status(adev) || !adev->status.present ||
acpi_device_enumerated(adev))
return -EINVAL;
memset(&info, 0, sizeof(info));
info.fwnode = acpi_fwnode_handle(adev);
memset(info, 0, sizeof(*info));
info->fwnode = acpi_fwnode_handle(adev);
memset(&lookup, 0, sizeof(lookup));
lookup.adapter_handle = ACPI_HANDLE(&adapter->dev);
lookup.device_handle = handle;
lookup.info = &info;
lookup.device_handle = acpi_device_handle(adev);
lookup.info = info;
/*
* Look up for I2cSerialBus resource with ResourceSource that
* matches with this adapter.
*/
/* Look up for I2cSerialBus resource */
INIT_LIST_HEAD(&resource_list);
ret = acpi_dev_get_resources(adev, &resource_list,
acpi_i2c_find_address, &lookup);
acpi_i2c_fill_info, &lookup);
acpi_dev_free_resource_list(&resource_list);
if (ret < 0 || !info.addr)
return AE_OK;
if (ret < 0 || !info->addr)
return -EINVAL;
*adapter_handle = lookup.adapter_handle;
/* Then fill IRQ number if any */
ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
if (ret < 0)
return AE_OK;
return -EINVAL;
resource_list_for_each_entry(entry, &resource_list) {
if (resource_type(entry->res) == IORESOURCE_IRQ) {
info.irq = entry->res->start;
info->irq = entry->res->start;
break;
}
}
acpi_dev_free_resource_list(&resource_list);
strlcpy(info->type, dev_name(&adev->dev), sizeof(info->type));
return 0;
}
static void acpi_i2c_register_device(struct i2c_adapter *adapter,
struct acpi_device *adev,
struct i2c_board_info *info)
{
adev->power.flags.ignore_parent = true;
strlcpy(info.type, dev_name(&adev->dev), sizeof(info.type));
if (!i2c_new_device(adapter, &info)) {
acpi_device_set_enumerated(adev);
if (!i2c_new_device(adapter, info)) {
adev->power.flags.ignore_parent = false;
dev_err(&adapter->dev,
"failed to add I2C device %s from ACPI\n",
dev_name(&adev->dev));
}
}
static acpi_status acpi_i2c_add_device(acpi_handle handle, u32 level,
void *data, void **return_value)
{
struct i2c_adapter *adapter = data;
struct acpi_device *adev;
acpi_handle adapter_handle;
struct i2c_board_info info;
if (acpi_bus_get_device(handle, &adev))
return AE_OK;
if (acpi_i2c_get_info(adev, &info, &adapter_handle))
return AE_OK;
if (adapter_handle != ACPI_HANDLE(&adapter->dev))
return AE_OK;
acpi_i2c_register_device(adapter, adev, &info);
return AE_OK;
}
@ -225,8 +246,80 @@ static void acpi_i2c_register_devices(struct i2c_adapter *adap)
dev_warn(&adap->dev, "failed to enumerate I2C slaves\n");
}
static int acpi_i2c_match_adapter(struct device *dev, void *data)
{
struct i2c_adapter *adapter = i2c_verify_adapter(dev);
if (!adapter)
return 0;
return ACPI_HANDLE(dev) == (acpi_handle)data;
}
static int acpi_i2c_match_device(struct device *dev, void *data)
{
return ACPI_COMPANION(dev) == data;
}
static struct i2c_adapter *acpi_i2c_find_adapter_by_handle(acpi_handle handle)
{
struct device *dev;
dev = bus_find_device(&i2c_bus_type, NULL, handle,
acpi_i2c_match_adapter);
return dev ? i2c_verify_adapter(dev) : NULL;
}
static struct i2c_client *acpi_i2c_find_client_by_adev(struct acpi_device *adev)
{
struct device *dev;
dev = bus_find_device(&i2c_bus_type, NULL, adev, acpi_i2c_match_device);
return dev ? i2c_verify_client(dev) : NULL;
}
static int acpi_i2c_notify(struct notifier_block *nb, unsigned long value,
void *arg)
{
struct acpi_device *adev = arg;
struct i2c_board_info info;
acpi_handle adapter_handle;
struct i2c_adapter *adapter;
struct i2c_client *client;
switch (value) {
case ACPI_RECONFIG_DEVICE_ADD:
if (acpi_i2c_get_info(adev, &info, &adapter_handle))
break;
adapter = acpi_i2c_find_adapter_by_handle(adapter_handle);
if (!adapter)
break;
acpi_i2c_register_device(adapter, adev, &info);
break;
case ACPI_RECONFIG_DEVICE_REMOVE:
if (!acpi_device_enumerated(adev))
break;
client = acpi_i2c_find_client_by_adev(adev);
if (!client)
break;
i2c_unregister_device(client);
put_device(&client->dev);
break;
}
return NOTIFY_OK;
}
static struct notifier_block i2c_acpi_notifier = {
.notifier_call = acpi_i2c_notify,
};
#else /* CONFIG_ACPI */
static inline void acpi_i2c_register_devices(struct i2c_adapter *adap) { }
extern struct notifier_block i2c_acpi_notifier;
#endif /* CONFIG_ACPI */
#ifdef CONFIG_ACPI_I2C_OPREGION
@ -1089,6 +1182,8 @@ void i2c_unregister_device(struct i2c_client *client)
{
if (client->dev.of_node)
of_node_clear_flag(client->dev.of_node, OF_POPULATED);
if (ACPI_COMPANION(&client->dev))
acpi_device_clear_enumerated(ACPI_COMPANION(&client->dev));
device_unregister(&client->dev);
}
EXPORT_SYMBOL_GPL(i2c_unregister_device);
@ -2117,6 +2212,8 @@ static int __init i2c_init(void)
if (IS_ENABLED(CONFIG_OF_DYNAMIC))
WARN_ON(of_reconfig_notifier_register(&i2c_of_notifier));
if (IS_ENABLED(CONFIG_ACPI))
WARN_ON(acpi_reconfig_notifier_register(&i2c_acpi_notifier));
return 0;
@ -2132,6 +2229,8 @@ bus_err:
static void __exit i2c_exit(void)
{
if (IS_ENABLED(CONFIG_ACPI))
WARN_ON(acpi_reconfig_notifier_unregister(&i2c_acpi_notifier));
if (IS_ENABLED(CONFIG_OF_DYNAMIC))
WARN_ON(of_reconfig_notifier_unregister(&i2c_of_notifier));
i2c_del_driver(&dummy_driver);