Merge branch 'i2c/for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...

[cascardo/linux.git] / drivers / i2c / i2c-core.c

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 66aa83b..632057a 100644 (file)
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1097,101 +1097,6 @@ EXPORT_SYMBOL(of_find_i2c_adapter_by_node);
 static void of_i2c_register_devices(struct i2c_adapter *adap) { }
 #endif /* CONFIG_OF */
 
-/* ACPI support code */
-
-#if IS_ENABLED(CONFIG_ACPI)
-static int acpi_i2c_add_resource(struct acpi_resource *ares, void *data)
-{
-       struct i2c_board_info *info = data;
-
-       if (ares->type == ACPI_RESOURCE_TYPE_SERIAL_BUS) {
-               struct acpi_resource_i2c_serialbus *sb;
-
-               sb = &ares->data.i2c_serial_bus;
-               if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_I2C) {
-                       info->addr = sb->slave_address;
-                       if (sb->access_mode == ACPI_I2C_10BIT_MODE)
-                               info->flags |= I2C_CLIENT_TEN;
-               }
-       } else if (info->irq < 0) {
-               struct resource r;
-
-               if (acpi_dev_resource_interrupt(ares, 0, &r))
-                       info->irq = r.start;
-       }
-
-       /* Tell the ACPI core to skip this resource */
-       return 1;
-}
-
-static acpi_status acpi_i2c_add_device(acpi_handle handle, u32 level,
-                                      void *data, void **return_value)
-{
-       struct i2c_adapter *adapter = data;
-       struct list_head resource_list;
-       struct i2c_board_info info;
-       struct acpi_device *adev;
-       int ret;
-
-       if (acpi_bus_get_device(handle, &adev))
-               return AE_OK;
-       if (acpi_bus_get_status(adev) || !adev->status.present)
-               return AE_OK;
-
-       memset(&info, 0, sizeof(info));
-       info.acpi_node.companion = adev;
-       info.irq = -1;
-
-       INIT_LIST_HEAD(&resource_list);
-       ret = acpi_dev_get_resources(adev, &resource_list,
-                                    acpi_i2c_add_resource, &info);
-       acpi_dev_free_resource_list(&resource_list);
-
-       if (ret < 0 || !info.addr)
-               return AE_OK;
-
-       adev->power.flags.ignore_parent = true;
-       strlcpy(info.type, dev_name(&adev->dev), sizeof(info.type));
-       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));
-       }
-
-       return AE_OK;
-}
-
-/**
- * acpi_i2c_register_devices - enumerate I2C slave devices behind adapter
- * @adap: pointer to adapter
- *
- * Enumerate all I2C slave devices behind this adapter by walking the ACPI
- * namespace. When a device is found it will be added to the Linux device
- * model and bound to the corresponding ACPI handle.
- */
-static void acpi_i2c_register_devices(struct i2c_adapter *adap)
-{
-       acpi_handle handle;
-       acpi_status status;
-
-       if (!adap->dev.parent)
-               return;
-
-       handle = ACPI_HANDLE(adap->dev.parent);
-       if (!handle)
-               return;
-
-       status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
-                                    acpi_i2c_add_device, NULL,
-                                    adap, NULL);
-       if (ACPI_FAILURE(status))
-               dev_warn(&adap->dev, "failed to enumerate I2C slaves\n");
-}
-#else
-static inline void acpi_i2c_register_devices(struct i2c_adapter *adap) {}
-#endif /* CONFIG_ACPI */
-
 static int i2c_do_add_adapter(struct i2c_driver *driver,
                              struct i2c_adapter *adap)
 {
@@ -1298,6 +1203,7 @@ exit_recovery:
        /* create pre-declared device nodes */
        of_i2c_register_devices(adap);
        acpi_i2c_register_devices(adap);
+       acpi_i2c_install_space_handler(adap);
 
        if (adap->nr < __i2c_first_dynamic_bus_num)
                i2c_scan_static_board_info(adap);
@@ -1471,6 +1377,7 @@ void i2c_del_adapter(struct i2c_adapter *adap)
                return;
        }
 
+       acpi_i2c_remove_space_handler(adap);
        /* Tell drivers about this removal */
        mutex_lock(&core_lock);
        bus_for_each_drv(&i2c_bus_type, NULL, adap,
@@ -2013,6 +1920,16 @@ static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver)
        if (!driver->detect || !address_list)
                return 0;
 
+       /* Warn that the adapter lost class based instantiation */
+       if (adapter->class == I2C_CLASS_DEPRECATED) {
+               dev_dbg(&adapter->dev,
+                       "This adapter dropped support for I2C classes and "
+                       "won't auto-detect %s devices anymore. If you need it, check "
+                       "'Documentation/i2c/instantiating-devices' for alternatives.\n",
+                       driver->driver.name);
+               return 0;
+       }
+
        /* Stop here if the classes do not match */
        if (!(adapter->class & driver->class))
                return 0;