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Subject[PATCH v3 15/16] fpga: region: add fpga_region_class_find
Date
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>
---
drivers/fpga/fpga-region.c | 23 +++++++++++++++--------
include/linux/fpga/fpga-region.h | 5 ++++-
2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c
index 2e6c47b..4d2a641 100644
--- a/drivers/fpga/fpga-region.c
+++ b/drivers/fpga/fpga-region.c
@@ -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);
}

/**
diff --git a/include/linux/fpga/fpga-region.h b/include/linux/fpga/fpga-region.h
index 76dda68..f2eecdd 100644
--- a/include/linux/fpga/fpga-region.h
+++ b/include/linux/fpga/fpga-region.h
@@ -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);

--
2.7.4
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