1 // SPDX-License-Identifier: GPL-2.0+
8 #include <linux/nvmem-provider.h>
12 struct rmem {  struct
14 	struct nvmem_device *nvmem;  member
23 	struct rmem *priv = context;  in rmem_read()  argument
24 	size_t available = priv->mem->size;  in rmem_read()
32 	 * uses-cases for this driver, the performance hit isn't a concern.  in rmem_read()
33 	 * Nor is likely to be, given the nature of the subsystem. Most nvmem  in rmem_read()
39 	addr = memremap(priv->mem->base, available, MEMREMAP_WB);  in rmem_read()
41 		dev_err(priv->dev, "Failed to remap memory region\n");  in rmem_read()
42 		return -ENOMEM;  in rmem_read()
52 	return count == bytes ? 0 : -EIO;  in rmem_read()
58 	struct device *dev = &pdev->dev;  in rmem_probe()
60 	struct rmem *priv;  in rmem_probe()
64 		return -ENOMEM;  in rmem_probe()
65 	priv->dev = dev;  in rmem_probe()
67 	mem = of_reserved_mem_lookup(dev->of_node);  in rmem_probe()
70 		return -EINVAL;  in rmem_probe()
72 	priv->mem = mem;  in rmem_probe()
76 	config.name = "rmem";  in rmem_probe()
78 	config.size = mem->size;  in rmem_probe()
85 	{ .compatible = "nvmem-rmem", },
93 		.name = "rmem",
100 MODULE_DESCRIPTION("Reserved Memory Based nvmem Driver");