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authorAlan Tull <atull@kernel.org>2018-05-16 18:49:55 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-05-25 18:23:55 +0200
commit7085e2a94f7df5f419e3cfb2fe809ce6564e9629 (patch)
treeb0609f2d091aae39e00609357d5e6de678887bef /Documentation/fpga
parentbbaa9cd3a605e337cefc566e5ac1b110763c8d1c (diff)
downloadlinux-7085e2a94f7df5f419e3cfb2fe809ce6564e9629.tar.bz2
fpga: manager: change api, don't use drvdata
Change fpga_mgr_register to not set or use drvdata. This supports the case where a PCIe device has more than one manager. Add fpga_mgr_create/free functions. Change fpga_mgr_register and fpga_mgr_unregister functions to take the mgr struct as their only parameter. struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name, const struct fpga_manager_ops *mops, void *priv); void fpga_mgr_free(struct fpga_manager *mgr); int fpga_mgr_register(struct fpga_manager *mgr); void fpga_mgr_unregister(struct fpga_manager *mgr); Update the drivers that call fpga_mgr_register with the new API. Signed-off-by: Alan Tull <atull@kernel.org> [Moritz: Fixup whitespace issue] Reported-by: Jiuyue Ma <majiuyue@huawei.com> Signed-off-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/fpga')
-rw-r--r--Documentation/fpga/fpga-mgr.txt35
1 files changed, 27 insertions, 8 deletions
diff --git a/Documentation/fpga/fpga-mgr.txt b/Documentation/fpga/fpga-mgr.txt
index cc6413ed6fc9..86b6df66a905 100644
--- a/Documentation/fpga/fpga-mgr.txt
+++ b/Documentation/fpga/fpga-mgr.txt
@@ -63,17 +63,23 @@ The user should call fpga_mgr_lock and verify that it returns 0 before
attempting to program the FPGA. Likewise, the user should call
fpga_mgr_unlock when done programming the FPGA.
+To alloc/free a FPGA manager struct:
+------------------------------------
+
+ struct fpga_manager *fpga_mgr_create(struct device *dev,
+ const char *name,
+ const struct fpga_manager_ops *mops,
+ void *priv);
+ void fpga_mgr_free(struct fpga_manager *mgr);
To register or unregister the low level FPGA-specific driver:
-------------------------------------------------------------
- int fpga_mgr_register(struct device *dev, const char *name,
- const struct fpga_manager_ops *mops,
- void *priv);
+ int fpga_mgr_register(struct fpga_manager *mgr);
- void fpga_mgr_unregister(struct device *dev);
+ void fpga_mgr_unregister(struct fpga_manager *mgr);
-Use of these two functions is described below in "How To Support a new FPGA
+Use of these functions is described below in "How To Support a new FPGA
device."
@@ -148,6 +154,7 @@ static int socfpga_fpga_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct socfpga_fpga_priv *priv;
+ struct fpga_manager *mgr;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -157,13 +164,25 @@ static int socfpga_fpga_probe(struct platform_device *pdev)
/* ... do ioremaps, get interrupts, etc. and save
them in priv... */
- return fpga_mgr_register(dev, "Altera SOCFPGA FPGA Manager",
- &socfpga_fpga_ops, priv);
+ mgr = fpga_mgr_create(dev, "Altera SOCFPGA FPGA Manager",
+ &socfpga_fpga_ops, priv);
+ if (!mgr)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, mgr);
+
+ ret = fpga_mgr_register(mgr);
+ if (ret)
+ fpga_mgr_free(mgr);
+
+ return ret;
}
static int socfpga_fpga_remove(struct platform_device *pdev)
{
- fpga_mgr_unregister(&pdev->dev);
+ struct fpga_manager *mgr = platform_get_drvdata(pdev);
+
+ fpga_mgr_unregister(mgr);
return 0;
}