diff options
Diffstat (limited to 'drivers/i2c/i2c-core.c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 1cca2631e5b..df937df845e 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -30,6 +30,8 @@ #include <linux/init.h> #include <linux/idr.h> #include <linux/mutex.h> +#include <linux/of_i2c.h> +#include <linux/of_device.h> #include <linux/completion.h> #include <linux/hardirq.h> #include <linux/irqflags.h> @@ -70,6 +72,10 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv) if (!client) return 0; + /* Attempt an OF style match */ + if (of_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) @@ -790,6 +796,9 @@ static int i2c_register_adapter(struct i2c_adapter *adap) if (adap->nr < __i2c_first_dynamic_bus_num) i2c_scan_static_board_info(adap); + /* Register devices from the device tree */ + of_i2c_register_devices(adap); + /* Notify drivers */ mutex_lock(&core_lock); dummy = bus_for_each_drv(&i2c_bus_type, NULL, adap, @@ -1428,13 +1437,12 @@ static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver) if (!(adapter->class & driver->class)) goto exit_free; - /* Stop here if we can't use SMBUS_QUICK */ - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_QUICK)) { + /* Stop here if the bus doesn't support probing */ + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE)) { if (address_list[0] == I2C_CLIENT_END) goto exit_free; - dev_warn(&adapter->dev, "SMBus Quick command not supported, " - "can't probe for chips\n"); + dev_warn(&adapter->dev, "Probing not supported\n"); err = -EOPNOTSUPP; goto exit_free; } |