From: Stephen Warren <[email protected]> This finds the struct i2c_adapter * for a given device tree node. Just like of_find_i2c_device_by_node.
Signed-off-by: Stephen Warren <[email protected]> --- Note: This series is a dependency for the pinctrl I2C bus mux I will send in a minute. It'd probably be easiest to merge this through the I2C tree. It might also be useful to put this patch (and the others I'll send) in a separate tree so it can be merged into any SoC trees that wish to use this new feature. drivers/of/of_i2c.c | 14 ++++++++++++++ include/linux/of_i2c.h | 4 ++++ 2 files changed, 18 insertions(+), 0 deletions(-) diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c index 0684887..1e173f3 100644 --- a/drivers/of/of_i2c.c +++ b/drivers/of/of_i2c.c @@ -94,4 +94,18 @@ struct i2c_client *of_find_i2c_device_by_node(struct device_node *node) } EXPORT_SYMBOL(of_find_i2c_device_by_node); +/* must call put_device() when done with returned i2c_adapter device */ +struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node) +{ + struct device *dev; + + dev = bus_find_device(&i2c_bus_type, NULL, node, + of_dev_node_match); + if (!dev) + return NULL; + + return i2c_verify_adapter(dev); +} +EXPORT_SYMBOL(of_find_i2c_adapter_by_node); + MODULE_LICENSE("GPL"); diff --git a/include/linux/of_i2c.h b/include/linux/of_i2c.h index 0efe8d4..1cb775f 100644 --- a/include/linux/of_i2c.h +++ b/include/linux/of_i2c.h @@ -20,6 +20,10 @@ extern void of_i2c_register_devices(struct i2c_adapter *adap); /* must call put_device() when done with returned i2c_client device */ extern struct i2c_client *of_find_i2c_device_by_node(struct device_node *node); +/* must call put_device() when done with returned i2c_adapter device */ +extern struct i2c_adapter *of_find_i2c_adapter_by_node( + struct device_node *node); + #else static inline void of_i2c_register_devices(struct i2c_adapter *adap) { -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
