drivers/nvmem/u-boot-env.c

1 // SPDX-License-Identifier: GPL-2.0-only
9 #include <linux/nvmem-provider.h>
14 #include "layouts/u-boot-env.h"
28 	struct device *dev = priv->dev;  in u_boot_env_read()
32 	err = mtd_read(priv->mtd, offset, bytes, &bytes_read, val);  in u_boot_env_read()
40 		return -EIO;  in u_boot_env_read()
49 		.name = "u-boot-env",  in u_boot_env_probe()
52 	struct device *dev = &pdev->dev;  in u_boot_env_probe()
53 	struct device_node *np = dev->of_node;  in u_boot_env_probe()
58 		return -ENOMEM;  in u_boot_env_probe()
59 	priv->dev = dev;  in u_boot_env_probe()
61 	priv->format = (uintptr_t)of_device_get_match_data(dev);  in u_boot_env_probe()
63 	priv->mtd = of_get_mtd_device_by_node(np);  in u_boot_env_probe()
64 	if (IS_ERR(priv->mtd)) {  in u_boot_env_probe()
65 		dev_err_probe(dev, PTR_ERR(priv->mtd), "Failed to get %pOF MTD\n", np);  in u_boot_env_probe()
66 		return PTR_ERR(priv->mtd);  in u_boot_env_probe()
71 	config.size = priv->mtd->size;  in u_boot_env_probe()
73 	priv->nvmem = devm_nvmem_register(dev, &config);  in u_boot_env_probe()
74 	if (IS_ERR(priv->nvmem))  in u_boot_env_probe()
75 		return PTR_ERR(priv->nvmem);  in u_boot_env_probe()
77 	return u_boot_env_parse(dev, priv->nvmem, priv->format);  in u_boot_env_probe()
81 	{ .compatible = "u-boot,env", .data = (void *)U_BOOT_FORMAT_SINGLE, },
82 	{ .compatible = "u-boot,env-redundant-bool", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
83 	{ .compatible = "u-boot,env-redundant-count", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
98 MODULE_DESCRIPTION("U-Boot environment variables support module");