diff options
Diffstat (limited to 'Documentation/acpi/enumeration.txt')
| -rw-r--r-- | Documentation/acpi/enumeration.txt | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/Documentation/acpi/enumeration.txt b/Documentation/acpi/enumeration.txt index d9be7a97dff..aca4e69121b 100644 --- a/Documentation/acpi/enumeration.txt +++ b/Documentation/acpi/enumeration.txt @@ -207,7 +207,7 @@ passing those. One idea is to return this in _DSM method like: Return (Local0) } -Then the at25 SPI driver can get this configation by calling _DSM on its +Then the at25 SPI driver can get this configuration by calling _DSM on its ACPI handle like: struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; @@ -228,19 +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 */ - - of_i2c_register_devices(adapter); - /* 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 +registered. Below is an example of how to add ACPI support to the existing mpu3050 input driver: |