3  * rcar-fcp.c  --  R-Car Frame Compression Processor Driver
20 #include <media/rcar-fcp.h>
35  * rcar_fcp_get - Find and acquire a reference to an FCP instance
36  * @np: Device node of the FCP instance
38  * Search the list of registered FCP instances for the instance corresponding to
41  * Return a pointer to the FCP instance, or an ERR_PTR if the instance can't be
46 	struct rcar_fcp_device *fcp;  in rcar_fcp_get()  local
50 	list_for_each_entry(fcp, &fcp_devices, list) {  in rcar_fcp_get()
51 		if (fcp->dev->of_node != np)  in rcar_fcp_get()
54 		get_device(fcp->dev);  in rcar_fcp_get()
58 	fcp = ERR_PTR(-EPROBE_DEFER);  in rcar_fcp_get()
62 	return fcp;  in rcar_fcp_get()
67  * rcar_fcp_put - Release a reference to an FCP instance
68  * @fcp: The FCP instance
70  * Release the FCP instance acquired by a call to rcar_fcp_get().
72 void rcar_fcp_put(struct rcar_fcp_device *fcp)  in rcar_fcp_put()  argument
74 	if (fcp)  in rcar_fcp_put()
75 		put_device(fcp->dev);  in rcar_fcp_put()
79 struct device *rcar_fcp_get_device(struct rcar_fcp_device *fcp)  in rcar_fcp_get_device()  argument
81 	return fcp->dev;  in rcar_fcp_get_device()
86  * rcar_fcp_enable - Enable an FCP
87  * @fcp: The FCP instance
89  * Before any memory access through an FCP is performed by a module, the FCP
92  * call when no more memory transfer can occur through the FCP.
97 int rcar_fcp_enable(struct rcar_fcp_device *fcp)  in rcar_fcp_enable()  argument
99 	if (!fcp)  in rcar_fcp_enable()
102 	return pm_runtime_resume_and_get(fcp->dev);  in rcar_fcp_enable()
107  * rcar_fcp_disable - Disable an FCP
108  * @fcp: The FCP instance
111  * reference counted a disable call may not disable the FCP synchronously.
113 void rcar_fcp_disable(struct rcar_fcp_device *fcp)  in rcar_fcp_disable()  argument
115 	if (fcp)  in rcar_fcp_disable()
116 		pm_runtime_put(fcp->dev);  in rcar_fcp_disable()
126 	struct rcar_fcp_device *fcp;  in rcar_fcp_probe()  local
128 	fcp = devm_kzalloc(&pdev->dev, sizeof(*fcp), GFP_KERNEL);  in rcar_fcp_probe()
129 	if (fcp == NULL)  in rcar_fcp_probe()
132 	fcp->dev = &pdev->dev;  in rcar_fcp_probe()
134 	dma_set_max_seg_size(fcp->dev, UINT_MAX);  in rcar_fcp_probe()
139 	list_add_tail(&fcp->list, &fcp_devices);  in rcar_fcp_probe()
142 	platform_set_drvdata(pdev, fcp);  in rcar_fcp_probe()
149 	struct rcar_fcp_device *fcp = platform_get_drvdata(pdev);  in rcar_fcp_remove()  local
152 	list_del(&fcp->list);  in rcar_fcp_remove()
169 		.name	= "rcar-fcp",
177 MODULE_ALIAS("rcar-fcp");
179 MODULE_DESCRIPTION("Renesas FCP Driver");