path: root/Documentation/acpi
diff options
authorMika Westerberg <>2013-08-21 17:28:23 +0300
committerWolfram Sang <>2013-08-23 10:22:29 +0200
commit55e71edb81b2b45273e7b284cce13ff24bde846f (patch)
tree6a9a473f7865779bf4a5cf3036711f0356ebae75 /Documentation/acpi
parent687b81d083c082bc1e853032e3a2a54f8c251d27 (diff)
i2c: move ACPI helpers into the core
This follows what has already been done for the DeviceTree helpers. Move the ACPI helpers from drivers/acpi/acpi_i2c.c to the I2C core and update documentation accordingly. This also solves a problem reported by Jerry Snitselaar that we can't build the ACPI I2C helpers as a module. Signed-off-by: Mika Westerberg <> Acked-by: Rafael J. Wysocki <> Signed-off-by: Wolfram Sang <>
Diffstat (limited to 'Documentation/acpi')
1 files changed, 3 insertions, 12 deletions
diff --git a/Documentation/acpi/enumeration.txt b/Documentation/acpi/enumeration.txt
index 958266efcc20..d977778b5e67 100644
--- a/Documentation/acpi/enumeration.txt
+++ b/Documentation/acpi/enumeration.txt
@@ -228,18 +228,9 @@ ACPI handle like:
I2C serial bus support
The slaves behind I2C bus controller only need to add the ACPI IDs like
-with the platform and SPI drivers. However the I2C bus controller driver
-needs to call acpi_i2c_register_devices() after it has added the adapter.
-An I2C bus (controller) driver does:
- ...
- ret = i2c_add_numbered_adapter(adapter);
- if (ret)
- /* handle error */
- /* Enumerate the slave devices behind this bus via ACPI */
- acpi_i2c_register_devices(adapter);
+with the platform and SPI drivers. The I2C core automatically enumerates
+any slave devices behind the controller device once the adapter is
Below is an example of how to add ACPI support to the existing mpu3050
input driver: