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Commit e0772de8 authored by Srinivas Kandagatla's avatar Srinivas Kandagatla Committed by Greg Kroah-Hartman
Browse files

slimbus: core: add of_slim_device_get() helper 



On SLIMBus controllers like Qcom NGD(non ported device), controller
can request logical address once the remote side is powered, having a
helper function like this to explicitly enumerate the bus is helpful.
Also codec drivers which are taking to interface device would need
such a helper too.

Signed-off-by: default avatarSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ba883d90

drivers/slimbus/core.c

+39 −0
Original line number Diff line number Diff line
@@ -356,6 +356,45 @@ struct slim_device *slim_get_device(struct slim_controller *ctrl, 
}

EXPORT_SYMBOL_GPL(slim_get_device);



static int of_slim_match_dev(struct device *dev, void *data)

{

	struct device_node *np = data;

	struct slim_device *sbdev = to_slim_device(dev);



	return (sbdev->dev.of_node == np);

}



static struct slim_device *of_find_slim_device(struct slim_controller *ctrl,

					       struct device_node *np)

{

	struct slim_device *sbdev;

	struct device *dev;



	dev = device_find_child(ctrl->dev, np, of_slim_match_dev);

	if (dev) {

		sbdev = to_slim_device(dev);

		return sbdev;

	}



	return NULL;

}



/**

 * of_slim_get_device() - get handle to a device using dt node.

 *

 * @ctrl: Controller on which this device will be added/queried

 * @np: node pointer to device

 *

 * Return: pointer to a device if it has already reported. Creates a new

 * device and returns pointer to it if the device has not yet enumerated.

 */

struct slim_device *of_slim_get_device(struct slim_controller *ctrl,

				       struct device_node *np)

{

	return of_find_slim_device(ctrl, np);

}

EXPORT_SYMBOL_GPL(of_slim_get_device);



static int slim_device_alloc_laddr(struct slim_device *sbdev,

				   bool report_present)

{

include/linux/slimbus.h

+2 −0
Original line number Diff line number Diff line
@@ -138,6 +138,8 @@ static inline void slim_set_devicedata(struct slim_device *dev, void *data) 
	dev_set_drvdata(&dev->dev, data);

}



struct slim_device *of_slim_get_device(struct slim_controller *ctrl,

				       struct device_node *np);

struct slim_device *slim_get_device(struct slim_controller *ctrl,

				    struct slim_eaddr *e_addr);

int slim_get_logical_addr(struct slim_device *sbdev);