Commit 213befe0 authored by Alan Tull's avatar Alan Tull Committed by Greg Kroah-Hartman

fpga: bridge: add devm_fpga_bridge_create

Add devm_fpga_bridge_create() which is the managed
version of fpga_bridge_create().

Change current bridge drivers to use
devm_fpga_bridge_create().
Signed-off-by: default avatarAlan Tull <atull@kernel.org>
Suggested-by: default avatarFederico Vaga <federico.vaga@cern.ch>
Acked-by: default avatarMoritz Fischer <mdf@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 084181fe
......@@ -10,6 +10,9 @@ API to implement a new FPGA bridge
.. kernel-doc:: include/linux/fpga/fpga-bridge.h
:functions: fpga_bridge_ops
.. kernel-doc:: drivers/fpga/fpga-bridge.c
:functions: devm_fpga_bridge_create
.. kernel-doc:: drivers/fpga/fpga-bridge.c
:functions: fpga_bridge_create
......
......@@ -121,18 +121,16 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
/* Get f2s bridge configuration saved in handoff register */
regmap_read(sysmgr, SYSMGR_ISWGRP_HANDOFF3, &priv->mask);
br = fpga_bridge_create(dev, F2S_BRIDGE_NAME,
&altera_fpga2sdram_br_ops, priv);
br = devm_fpga_bridge_create(dev, F2S_BRIDGE_NAME,
&altera_fpga2sdram_br_ops, priv);
if (!br)
return -ENOMEM;
platform_set_drvdata(pdev, br);
ret = fpga_bridge_register(br);
if (ret) {
fpga_bridge_free(br);
if (ret)
return ret;
}
dev_info(dev, "driver initialized with handoff %08x\n", priv->mask);
......
......@@ -213,7 +213,6 @@ static int altera_freeze_br_probe(struct platform_device *pdev)
struct fpga_bridge *br;
struct resource *res;
u32 status, revision;
int ret;
if (!np)
return -ENODEV;
......@@ -245,20 +244,14 @@ static int altera_freeze_br_probe(struct platform_device *pdev)
priv->base_addr = base_addr;
br = fpga_bridge_create(dev, FREEZE_BRIDGE_NAME,
&altera_freeze_br_br_ops, priv);
br = devm_fpga_bridge_create(dev, FREEZE_BRIDGE_NAME,
&altera_freeze_br_br_ops, priv);
if (!br)
return -ENOMEM;
platform_set_drvdata(pdev, br);
ret = fpga_bridge_register(br);
if (ret) {
fpga_bridge_free(br);
return ret;
}
return 0;
return fpga_bridge_register(br);
}
static int altera_freeze_br_remove(struct platform_device *pdev)
......
......@@ -180,7 +180,8 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
}
}
br = fpga_bridge_create(dev, priv->name, &altera_hps2fpga_br_ops, priv);
br = devm_fpga_bridge_create(dev, priv->name,
&altera_hps2fpga_br_ops, priv);
if (!br) {
ret = -ENOMEM;
goto err;
......@@ -190,12 +191,10 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
ret = fpga_bridge_register(br);
if (ret)
goto err_free;
goto err;
return 0;
err_free:
fpga_bridge_free(br);
err:
clk_disable_unprepare(priv->clk);
......
......@@ -61,7 +61,6 @@ static int fme_br_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct fme_br_priv *priv;
struct fpga_bridge *br;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
......@@ -69,18 +68,14 @@ static int fme_br_probe(struct platform_device *pdev)
priv->pdata = dev_get_platdata(dev);
br = fpga_bridge_create(dev, "DFL FPGA FME Bridge",
&fme_bridge_ops, priv);
br = devm_fpga_bridge_create(dev, "DFL FPGA FME Bridge",
&fme_bridge_ops, priv);
if (!br)
return -ENOMEM;
platform_set_drvdata(pdev, br);
ret = fpga_bridge_register(br);
if (ret)
fpga_bridge_free(br);
return ret;
return fpga_bridge_register(br);
}
static int fme_br_remove(struct platform_device *pdev)
......
......@@ -324,6 +324,9 @@ ATTRIBUTE_GROUPS(fpga_bridge);
* @br_ops: pointer to structure of fpga bridge ops
* @priv: FPGA bridge private data
*
* The caller of this function is responsible for freeing the bridge with
* fpga_bridge_free(). Using devm_fpga_bridge_create() instead is recommended.
*
* Return: struct fpga_bridge or NULL
*/
struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name,
......@@ -378,8 +381,8 @@ struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name,
EXPORT_SYMBOL_GPL(fpga_bridge_create);
/**
* fpga_bridge_free - free a fpga bridge and its id
* @bridge: FPGA bridge struct created by fpga_bridge_create
* fpga_bridge_free - free a fpga bridge created by fpga_bridge_create()
* @bridge: FPGA bridge struct
*/
void fpga_bridge_free(struct fpga_bridge *bridge)
{
......@@ -388,9 +391,56 @@ void fpga_bridge_free(struct fpga_bridge *bridge)
}
EXPORT_SYMBOL_GPL(fpga_bridge_free);
static void devm_fpga_bridge_release(struct device *dev, void *res)
{
struct fpga_bridge *bridge = *(struct fpga_bridge **)res;
fpga_bridge_free(bridge);
}
/**
* fpga_bridge_register - register a fpga bridge
* @bridge: FPGA bridge struct created by fpga_bridge_create
* devm_fpga_bridge_create - create and init a managed struct fpga_bridge
* @dev: FPGA bridge device from pdev
* @name: FPGA bridge name
* @br_ops: pointer to structure of fpga bridge ops
* @priv: FPGA bridge private data
*
* This function is intended for use in a FPGA bridge driver's probe function.
* After the bridge driver creates the struct with devm_fpga_bridge_create(), it
* should register the bridge with fpga_bridge_register(). The bridge driver's
* remove function should call fpga_bridge_unregister(). The bridge struct
* allocated with this function will be freed automatically on driver detach.
* This includes the case of a probe function returning error before calling
* fpga_bridge_register(), the struct will still get cleaned up.
*
* Return: struct fpga_bridge or NULL
*/
struct fpga_bridge
*devm_fpga_bridge_create(struct device *dev, const char *name,
const struct fpga_bridge_ops *br_ops, void *priv)
{
struct fpga_bridge **ptr, *bridge;
ptr = devres_alloc(devm_fpga_bridge_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return NULL;
bridge = fpga_bridge_create(dev, name, br_ops, priv);
if (!bridge) {
devres_free(ptr);
} else {
*ptr = bridge;
devres_add(dev, ptr);
}
return bridge;
}
EXPORT_SYMBOL_GPL(devm_fpga_bridge_create);
/**
* fpga_bridge_register - register a FPGA bridge
*
* @bridge: FPGA bridge struct
*
* Return: 0 for success, error code otherwise.
*/
......@@ -412,8 +462,11 @@ int fpga_bridge_register(struct fpga_bridge *bridge)
EXPORT_SYMBOL_GPL(fpga_bridge_register);
/**
* fpga_bridge_unregister - unregister and free a fpga bridge
* @bridge: FPGA bridge struct created by fpga_bridge_create
* fpga_bridge_unregister - unregister a FPGA bridge
*
* @bridge: FPGA bridge struct
*
* This function is intended for use in a FPGA bridge driver's remove function.
*/
void fpga_bridge_unregister(struct fpga_bridge *bridge)
{
......@@ -430,9 +483,6 @@ EXPORT_SYMBOL_GPL(fpga_bridge_unregister);
static void fpga_bridge_dev_release(struct device *dev)
{
struct fpga_bridge *bridge = to_fpga_bridge(dev);
fpga_bridge_free(bridge);
}
static int __init fpga_bridge_dev_init(void)
......
......@@ -121,8 +121,8 @@ static int xlnx_pr_decoupler_probe(struct platform_device *pdev)
clk_disable(priv->clk);
br = fpga_bridge_create(&pdev->dev, "Xilinx PR Decoupler",
&xlnx_pr_decoupler_br_ops, priv);
br = devm_fpga_bridge_create(&pdev->dev, "Xilinx PR Decoupler",
&xlnx_pr_decoupler_br_ops, priv);
if (!br) {
err = -ENOMEM;
goto err_clk;
......
......@@ -69,4 +69,8 @@ void fpga_bridge_free(struct fpga_bridge *br);
int fpga_bridge_register(struct fpga_bridge *br);
void fpga_bridge_unregister(struct fpga_bridge *br);
struct fpga_bridge
*devm_fpga_bridge_create(struct device *dev, const char *name,
const struct fpga_bridge_ops *br_ops, void *priv);
#endif /* _LINUX_FPGA_BRIDGE_H */
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