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fpga: region: add fpga_region_class_find 

Add a function for searching the fpga-region class.  This
will be useful when device tree code is no longer in the
same file that declares the fpga-region class.  Another
step in separating common FPGA region code from device
tree support.

Signed-off-by: Alan Tull <atull@kernel.org>
Acked-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alan Tull 2017-11-15 14:20:24 -06:00 committed by Greg Kroah-Hartman
parent 52a3a7ccce
commit 503d4b7a44
2 changed files with 19 additions and 9 deletions
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23
drivers/fpga/fpga-region.c
View File

@ -30,6 +30,20 @@
static DEFINE_IDA(fpga_region_ida);
static struct class *fpga_region_class;
struct fpga_region *fpga_region_class_find(
struct device *start, const void *data,
int (*match)(struct device *, const void *))
{
struct device *dev;
dev = class_find_device(fpga_region_class, start, data, match);
if (!dev)
return NULL;
return to_fpga_region(dev);
}
EXPORT_SYMBOL_GPL(fpga_region_class_find);
static const struct of_device_id fpga_region_of_match[] = {
{ .compatible = "fpga-region", },
{},
@ -51,14 +65,7 @@ static int fpga_region_of_node_match(struct device *dev, const void *data)
*/
static struct fpga_region *of_fpga_region_find(struct device_node *np)
{
struct device *dev;
dev = class_find_device(fpga_region_class, NULL, np,
fpga_region_of_node_match);
if (!dev)
return NULL;
return to_fpga_region(dev);
return fpga_region_class_find(NULL, np, fpga_region_of_node_match);
}
/**

5
include/linux/fpga/fpga-region.h
View File

@ -27,8 +27,11 @@ struct fpga_region {
#define to_fpga_region(d) container_of(d, struct fpga_region, dev)
int fpga_region_program_fpga(struct fpga_region *region);
struct fpga_region *fpga_region_class_find(
struct device *start, const void *data,
int (*match)(struct device *, const void *));
int fpga_region_program_fpga(struct fpga_region *region);
int fpga_region_register(struct device *dev, struct fpga_region *region);
int fpga_region_unregister(struct fpga_region *region);