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: Alan Tull <atull@kernel.org> Suggested-by: Federico Vaga <federico.vaga@cern.ch> Acked-by: Moritz Fischer <mdf@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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084181fe8c
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213befe049
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@ -10,6 +10,9 @@ API to implement a new FPGA bridge
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.. kernel-doc:: include/linux/fpga/fpga-bridge.h
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:functions: fpga_bridge_ops
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.. kernel-doc:: drivers/fpga/fpga-bridge.c
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:functions: devm_fpga_bridge_create
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.. kernel-doc:: drivers/fpga/fpga-bridge.c
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:functions: fpga_bridge_create
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@ -121,18 +121,16 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
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/* Get f2s bridge configuration saved in handoff register */
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regmap_read(sysmgr, SYSMGR_ISWGRP_HANDOFF3, &priv->mask);
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br = fpga_bridge_create(dev, F2S_BRIDGE_NAME,
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&altera_fpga2sdram_br_ops, priv);
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br = devm_fpga_bridge_create(dev, F2S_BRIDGE_NAME,
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&altera_fpga2sdram_br_ops, priv);
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if (!br)
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return -ENOMEM;
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platform_set_drvdata(pdev, br);
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ret = fpga_bridge_register(br);
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if (ret) {
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fpga_bridge_free(br);
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if (ret)
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return ret;
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}
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dev_info(dev, "driver initialized with handoff %08x\n", priv->mask);
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@ -213,7 +213,6 @@ static int altera_freeze_br_probe(struct platform_device *pdev)
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struct fpga_bridge *br;
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struct resource *res;
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u32 status, revision;
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int ret;
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if (!np)
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return -ENODEV;
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@ -245,20 +244,14 @@ static int altera_freeze_br_probe(struct platform_device *pdev)
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priv->base_addr = base_addr;
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br = fpga_bridge_create(dev, FREEZE_BRIDGE_NAME,
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&altera_freeze_br_br_ops, priv);
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br = devm_fpga_bridge_create(dev, FREEZE_BRIDGE_NAME,
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&altera_freeze_br_br_ops, priv);
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if (!br)
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return -ENOMEM;
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platform_set_drvdata(pdev, br);
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ret = fpga_bridge_register(br);
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if (ret) {
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fpga_bridge_free(br);
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return ret;
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}
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return 0;
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return fpga_bridge_register(br);
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}
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static int altera_freeze_br_remove(struct platform_device *pdev)
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@ -180,7 +180,8 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
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}
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}
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br = fpga_bridge_create(dev, priv->name, &altera_hps2fpga_br_ops, priv);
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br = devm_fpga_bridge_create(dev, priv->name,
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&altera_hps2fpga_br_ops, priv);
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if (!br) {
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ret = -ENOMEM;
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goto err;
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@ -190,12 +191,10 @@ static int alt_fpga_bridge_probe(struct platform_device *pdev)
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ret = fpga_bridge_register(br);
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if (ret)
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goto err_free;
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goto err;
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return 0;
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err_free:
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fpga_bridge_free(br);
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err:
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clk_disable_unprepare(priv->clk);
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@ -61,7 +61,6 @@ static int fme_br_probe(struct platform_device *pdev)
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struct device *dev = &pdev->dev;
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struct fme_br_priv *priv;
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struct fpga_bridge *br;
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int ret;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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@ -69,18 +68,14 @@ static int fme_br_probe(struct platform_device *pdev)
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priv->pdata = dev_get_platdata(dev);
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br = fpga_bridge_create(dev, "DFL FPGA FME Bridge",
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&fme_bridge_ops, priv);
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br = devm_fpga_bridge_create(dev, "DFL FPGA FME Bridge",
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&fme_bridge_ops, priv);
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if (!br)
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return -ENOMEM;
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platform_set_drvdata(pdev, br);
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ret = fpga_bridge_register(br);
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if (ret)
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fpga_bridge_free(br);
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return ret;
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return fpga_bridge_register(br);
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}
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static int fme_br_remove(struct platform_device *pdev)
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@ -324,6 +324,9 @@ ATTRIBUTE_GROUPS(fpga_bridge);
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* @br_ops: pointer to structure of fpga bridge ops
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* @priv: FPGA bridge private data
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*
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* The caller of this function is responsible for freeing the bridge with
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* fpga_bridge_free(). Using devm_fpga_bridge_create() instead is recommended.
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*
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* Return: struct fpga_bridge or NULL
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*/
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struct fpga_bridge *fpga_bridge_create(struct device *dev, const char *name,
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@ -378,8 +381,8 @@ error_kfree:
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EXPORT_SYMBOL_GPL(fpga_bridge_create);
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/**
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* fpga_bridge_free - free a fpga bridge and its id
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* @bridge: FPGA bridge struct created by fpga_bridge_create
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* fpga_bridge_free - free a fpga bridge created by fpga_bridge_create()
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* @bridge: FPGA bridge struct
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*/
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void fpga_bridge_free(struct fpga_bridge *bridge)
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{
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@ -388,9 +391,56 @@ void fpga_bridge_free(struct fpga_bridge *bridge)
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}
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EXPORT_SYMBOL_GPL(fpga_bridge_free);
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static void devm_fpga_bridge_release(struct device *dev, void *res)
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{
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struct fpga_bridge *bridge = *(struct fpga_bridge **)res;
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fpga_bridge_free(bridge);
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}
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/**
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* fpga_bridge_register - register a fpga bridge
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* @bridge: FPGA bridge struct created by fpga_bridge_create
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* devm_fpga_bridge_create - create and init a managed struct fpga_bridge
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* @dev: FPGA bridge device from pdev
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* @name: FPGA bridge name
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* @br_ops: pointer to structure of fpga bridge ops
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* @priv: FPGA bridge private data
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*
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* This function is intended for use in a FPGA bridge driver's probe function.
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* After the bridge driver creates the struct with devm_fpga_bridge_create(), it
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* should register the bridge with fpga_bridge_register(). The bridge driver's
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* remove function should call fpga_bridge_unregister(). The bridge struct
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* allocated with this function will be freed automatically on driver detach.
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* This includes the case of a probe function returning error before calling
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* fpga_bridge_register(), the struct will still get cleaned up.
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*
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* Return: struct fpga_bridge or NULL
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*/
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struct fpga_bridge
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*devm_fpga_bridge_create(struct device *dev, const char *name,
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const struct fpga_bridge_ops *br_ops, void *priv)
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{
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struct fpga_bridge **ptr, *bridge;
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ptr = devres_alloc(devm_fpga_bridge_release, sizeof(*ptr), GFP_KERNEL);
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if (!ptr)
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return NULL;
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bridge = fpga_bridge_create(dev, name, br_ops, priv);
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if (!bridge) {
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devres_free(ptr);
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} else {
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*ptr = bridge;
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devres_add(dev, ptr);
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}
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return bridge;
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}
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EXPORT_SYMBOL_GPL(devm_fpga_bridge_create);
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/**
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* fpga_bridge_register - register a FPGA bridge
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*
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* @bridge: FPGA bridge struct
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*
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* Return: 0 for success, error code otherwise.
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*/
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EXPORT_SYMBOL_GPL(fpga_bridge_register);
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/**
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* fpga_bridge_unregister - unregister and free a fpga bridge
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* @bridge: FPGA bridge struct created by fpga_bridge_create
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* fpga_bridge_unregister - unregister a FPGA bridge
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*
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* @bridge: FPGA bridge struct
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*
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* This function is intended for use in a FPGA bridge driver's remove function.
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*/
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void fpga_bridge_unregister(struct fpga_bridge *bridge)
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{
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static void fpga_bridge_dev_release(struct device *dev)
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{
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struct fpga_bridge *bridge = to_fpga_bridge(dev);
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fpga_bridge_free(bridge);
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}
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static int __init fpga_bridge_dev_init(void)
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@ -121,8 +121,8 @@ static int xlnx_pr_decoupler_probe(struct platform_device *pdev)
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clk_disable(priv->clk);
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br = fpga_bridge_create(&pdev->dev, "Xilinx PR Decoupler",
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&xlnx_pr_decoupler_br_ops, priv);
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br = devm_fpga_bridge_create(&pdev->dev, "Xilinx PR Decoupler",
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&xlnx_pr_decoupler_br_ops, priv);
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if (!br) {
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err = -ENOMEM;
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goto err_clk;
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@ -69,4 +69,8 @@ void fpga_bridge_free(struct fpga_bridge *br);
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int fpga_bridge_register(struct fpga_bridge *br);
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void fpga_bridge_unregister(struct fpga_bridge *br);
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struct fpga_bridge
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*devm_fpga_bridge_create(struct device *dev, const char *name,
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const struct fpga_bridge_ops *br_ops, void *priv);
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#endif /* _LINUX_FPGA_BRIDGE_H */
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