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authorAlan Tull <atull@opensource.altera.com>2016-11-01 14:14:23 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-10 17:03:35 +0100
commit9dce0287a60d72656a787b075f1b9162ff3cb142 (patch)
tree7734048996d27f0b4daf0d5ab823ba014cee8c68 /drivers/fpga/fpga-mgr.c
parent39a842e22c1bf3ec3dce36e01fe8ba8ee66c80c8 (diff)
downloadlinux-9dce0287a60d72656a787b075f1b9162ff3cb142.tar.gz
fpga: add method to get fpga manager from device
The intent is to provide a non-DT method of getting ahold of a FPGA manager to do some FPGA programming. This patch refactors of_fpga_mgr_get() to reuse most of it while adding a new method fpga_mgr_get() for getting a pointer to a fpga manager struct, given the device. Signed-off-by: Alan Tull <atull@opensource.altera.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
-rw-r--r--drivers/fpga/fpga-mgr.c76
1 files changed, 54 insertions, 22 deletions
diff --git a/drivers/fpga/fpga-mgr.c b/drivers/fpga/fpga-mgr.c
index 953dc9195937..b690e65d55fe 100644
--- a/drivers/fpga/fpga-mgr.c
+++ b/drivers/fpga/fpga-mgr.c
@@ -39,7 +39,8 @@ static struct class *fpga_mgr_class;
* Step the low level fpga manager through the device-specific steps of getting
* an FPGA ready to be configured, writing the image to it, then doing whatever
* post-configuration steps necessary. This code assumes the caller got the
- * mgr pointer from of_fpga_mgr_get() and checked that it is not an error code.
+ * mgr pointer from of_fpga_mgr_get() or fpga_mgr_get() and checked that it is
+ * not an error code.
*
* Return: 0 on success, negative error code otherwise.
*/
@@ -99,7 +100,8 @@ EXPORT_SYMBOL_GPL(fpga_mgr_buf_load);
* Request an FPGA image using the firmware class, then write out to the FPGA.
* Update the state before each step to provide info on what step failed if
* there is a failure. This code assumes the caller got the mgr pointer
- * from of_fpga_mgr_get() and checked that it is not an error code.
+ * from of_fpga_mgr_get() or fpga_mgr_get() and checked that it is not an error
+ * code.
*
* Return: 0 on success, negative error code otherwise.
*/
@@ -181,30 +183,11 @@ static struct attribute *fpga_mgr_attrs[] = {
};
ATTRIBUTE_GROUPS(fpga_mgr);
-static int fpga_mgr_of_node_match(struct device *dev, const void *data)
-{
- return dev->of_node == data;
-}
-
-/**
- * of_fpga_mgr_get - get an exclusive reference to a fpga mgr
- * @node: device node
- *
- * Given a device node, get an exclusive reference to a fpga mgr.
- *
- * Return: fpga manager struct or IS_ERR() condition containing error code.
- */
-struct fpga_manager *of_fpga_mgr_get(struct device_node *node)
+struct fpga_manager *__fpga_mgr_get(struct device *dev)
{
struct fpga_manager *mgr;
- struct device *dev;
int ret = -ENODEV;
- dev = class_find_device(fpga_mgr_class, NULL, node,
- fpga_mgr_of_node_match);
- if (!dev)
- return ERR_PTR(-ENODEV);
-
mgr = to_fpga_manager(dev);
if (!mgr)
goto err_dev;
@@ -226,6 +209,55 @@ err_dev:
put_device(dev);
return ERR_PTR(ret);
}
+
+static int fpga_mgr_dev_match(struct device *dev, const void *data)
+{
+ return dev->parent == data;
+}
+
+/**
+ * fpga_mgr_get - get an exclusive reference to a fpga mgr
+ * @dev: parent device that fpga mgr was registered with
+ *
+ * Given a device, get an exclusive reference to a fpga mgr.
+ *
+ * Return: fpga manager struct or IS_ERR() condition containing error code.
+ */
+struct fpga_manager *fpga_mgr_get(struct device *dev)
+{
+ struct device *mgr_dev = class_find_device(fpga_mgr_class, NULL, dev,
+ fpga_mgr_dev_match);
+ if (!mgr_dev)
+ return ERR_PTR(-ENODEV);
+
+ return __fpga_mgr_get(mgr_dev);
+}
+EXPORT_SYMBOL_GPL(fpga_mgr_get);
+
+static int fpga_mgr_of_node_match(struct device *dev, const void *data)
+{
+ return dev->of_node == data;
+}
+
+/**
+ * of_fpga_mgr_get - get an exclusive reference to a fpga mgr
+ * @node: device node
+ *
+ * Given a device node, get an exclusive reference to a fpga mgr.
+ *
+ * Return: fpga manager struct or IS_ERR() condition containing error code.
+ */
+struct fpga_manager *of_fpga_mgr_get(struct device_node *node)
+{
+ struct device *dev;
+
+ dev = class_find_device(fpga_mgr_class, NULL, node,
+ fpga_mgr_of_node_match);
+ if (!dev)
+ return ERR_PTR(-ENODEV);
+
+ return __fpga_mgr_get(dev);
+}
EXPORT_SYMBOL_GPL(of_fpga_mgr_get);
/**