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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2012-11-23 12:23:40 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-23 12:23:40 +0100 |
| commit | 907ddf89d0bb7f57e1e21485900e6564a1ab512a (patch) | |
| tree | 5008892e74b8b805a120b659f701604593b5d3f7 /drivers/i2c/i2c-core.c | |
| parent | ACPI / platform: Initialize ACPI handles of platform devices in advance (diff) | |
| download | linux-907ddf89d0bb7f57e1e21485900e6564a1ab512a.tar.xz linux-907ddf89d0bb7f57e1e21485900e6564a1ab512a.zip | |
i2c / ACPI: add ACPI enumeration support
ACPI 5 introduced I2cSerialBus resource that makes it possible to enumerate
and configure the I2C slave devices behind the I2C controller. This patch
adds helper functions to support I2C slave enumeration.
An ACPI enabled I2C controller driver only needs to call acpi_i2c_register_devices()
in order to get its slave devices enumerated, created and bound to the
corresponding ACPI handle.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index a7edf987a339..e388590b44ab 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -39,6 +39,7 @@ #include <linux/irqflags.h> #include <linux/rwsem.h> #include <linux/pm_runtime.h> +#include <linux/acpi.h> #include <asm/uaccess.h> #include "i2c-core.h" @@ -78,6 +79,10 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv) if (of_driver_match_device(dev, drv)) return 1; + /* Then ACPI style match */ + if (acpi_driver_match_device(dev, drv)) + return 1; + driver = to_i2c_driver(drv); /* match on an id table if there is one */ if (driver->id_table) @@ -539,6 +544,7 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info) client->dev.bus = &i2c_bus_type; client->dev.type = &i2c_client_type; client->dev.of_node = info->of_node; + ACPI_HANDLE_SET(&client->dev, info->acpi_node.handle); /* For 10-bit clients, add an arbitrary offset to avoid collisions */ dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap), |