Commit 9a2139c2 authored by Casey Connolly's avatar Casey Connolly Committed by Jonathan Cameron
Browse files

spmi: add a helper to look up an SPMI device from a device node 



The helper function spmi_device_from_of() takes a device node and
returns the SPMI device associated with it.
This is like of_find_device_by_node but for SPMI devices.

Signed-off-by: default avatarCaleb Connolly <caleb.connolly@linaro.org>
Acked-by: default avatarStephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20220429220904.137297-2-caleb.connolly@linaro.org


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent f2906aa8

drivers/spmi/spmi.c

+17 −0
Original line number Diff line number Diff line
@@ -386,6 +386,23 @@ static struct bus_type spmi_bus_type = { 
	.uevent		= spmi_drv_uevent,

};



/**

 * spmi_device_from_of() - get the associated SPMI device from a device node

 *

 * @np:		device node

 *

 * Returns the struct spmi_device associated with a device node or NULL.

 */

struct spmi_device *spmi_device_from_of(struct device_node *np)

{

	struct device *dev = bus_find_device_by_of_node(&spmi_bus_type, np);



	if (dev)

		return to_spmi_device(dev);

	return NULL;

}

EXPORT_SYMBOL_GPL(spmi_device_from_of);



/**

 * spmi_controller_alloc() - Allocate a new SPMI device

 * @ctrl:	associated controller

include/linux/spmi.h

+3 −0
Original line number Diff line number Diff line
@@ -164,6 +164,9 @@ static inline void spmi_driver_unregister(struct spmi_driver *sdrv) 
	module_driver(__spmi_driver, spmi_driver_register, \

			spmi_driver_unregister)



struct device_node;



struct spmi_device *spmi_device_from_of(struct device_node *np);

int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf);

int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,

			   size_t len);