1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/nvmem-consumer.h>
13 #include <linux/nvmem-provider.h>
54 	struct device *dev = priv->dev;  in u_boot_env_read()
58 	err = mtd_read(priv->mtd, offset, bytes, &bytes_read, val);  in u_boot_env_read()
66 		return -EIO;  in u_boot_env_read()
77 	if (bytes != 3 * ETH_ALEN - 1)  in u_boot_env_read_post_process_ethaddr()
78 		return -EINVAL;  in u_boot_env_read_post_process_ethaddr()
81 		return -EINVAL;  in u_boot_env_read_post_process_ethaddr()
94 	struct nvmem_device *nvmem = priv->nvmem;  in u_boot_env_add_cells()
95 	struct device *dev = priv->dev;  in u_boot_env_add_cells()
112 			return -ENOMEM;  in u_boot_env_add_cells()
113 		info.offset = data_offset + value - data;  in u_boot_env_add_cells()
115 		info.np = of_get_child_by_name(dev->of_node, info.name);  in u_boot_env_add_cells()
130 	struct nvmem_device *nvmem = priv->nvmem;  in u_boot_env_parse()
131 	struct device *dev = priv->dev;  in u_boot_env_parse()
149 		err = -ENOMEM;  in u_boot_env_parse()
158 		err = -EIO;  in u_boot_env_parse()
162 	switch (priv->format) {  in u_boot_env_parse()
181 		dev_err(dev, "Device too small for u-boot-env\n");  in u_boot_env_parse()
182 		err = -EIO;  in u_boot_env_parse()
188 	crc32_data_len = dev_size - crc32_data_offset;  in u_boot_env_parse()
189 	data_len = dev_size - data_offset;  in u_boot_env_parse()
194 		err = -EINVAL;  in u_boot_env_parse()
198 	buf[dev_size - 1] = '\0';  in u_boot_env_parse()
210 		.name = "u-boot-env",  in u_boot_env_probe()
213 	struct device *dev = &pdev->dev;  in u_boot_env_probe()
214 	struct device_node *np = dev->of_node;  in u_boot_env_probe()
219 		return -ENOMEM;  in u_boot_env_probe()
220 	priv->dev = dev;  in u_boot_env_probe()
222 	priv->format = (uintptr_t)of_device_get_match_data(dev);  in u_boot_env_probe()
224 	priv->mtd = of_get_mtd_device_by_node(np);  in u_boot_env_probe()
225 	if (IS_ERR(priv->mtd)) {  in u_boot_env_probe()
226 		dev_err_probe(dev, PTR_ERR(priv->mtd), "Failed to get %pOF MTD\n", np);  in u_boot_env_probe()
227 		return PTR_ERR(priv->mtd);  in u_boot_env_probe()
232 	config.size = priv->mtd->size;  in u_boot_env_probe()
234 	priv->nvmem = devm_nvmem_register(dev, &config);  in u_boot_env_probe()
235 	if (IS_ERR(priv->nvmem))  in u_boot_env_probe()
236 		return PTR_ERR(priv->nvmem);  in u_boot_env_probe()
242 	{ .compatible = "u-boot,env", .data = (void *)U_BOOT_FORMAT_SINGLE, },
243 	{ .compatible = "u-boot,env-redundant-bool", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
244 	{ .compatible = "u-boot,env-redundant-count", .data = (void *)U_BOOT_FORMAT_REDUNDANT, },
245 	{ .compatible = "brcm,env", .data = (void *)U_BOOT_FORMAT_BROADCOM, },