1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/nvmem-consumer.h>
6 #include <linux/nvmem-provider.h>
29 		return -EINVAL;  in sl28vpd_mac_address_pp()
32 		return -EINVAL;  in sl28vpd_mac_address_pp()
35 		return -EINVAL;  in sl28vpd_mac_address_pp()
44 		.name = "serial-number",
49 		.name = "base-mac-address",
56 static int sl28vpd_v1_check_crc(struct device *dev, struct nvmem_device *nvmem)  in sl28vpd_v1_check_crc()  argument
65 	ret = nvmem_device_read(nvmem, 0, sizeof(data_v1), &data_v1);  in sl28vpd_v1_check_crc()
69 		return -EIO;  in sl28vpd_v1_check_crc()
71 	crc = crc8(table, (void *)&data_v1, sizeof(data_v1) - 1, 0);  in sl28vpd_v1_check_crc()
77 		return -EINVAL;  in sl28vpd_v1_check_crc()
83 static int sl28vpd_add_cells(struct nvmem_layout *layout)  in sl28vpd_add_cells()  argument
85 	struct nvmem_device *nvmem = layout->nvmem;  in sl28vpd_add_cells()  local
86 	struct device *dev = &layout->dev;  in sl28vpd_add_cells()
94 	ret = nvmem_device_read(nvmem, 0, sizeof(hdr), &hdr);  in sl28vpd_add_cells()
98 		return -EIO;  in sl28vpd_add_cells()
102 		return -EINVAL;  in sl28vpd_add_cells()
107 		return -EINVAL;  in sl28vpd_add_cells()
110 	ret = sl28vpd_v1_check_crc(dev, nvmem);  in sl28vpd_add_cells()
114 	layout_np = of_nvmem_layout_get_container(nvmem);  in sl28vpd_add_cells()
116 		return -ENOENT;  in sl28vpd_add_cells()
121 		info.name = pinfo->name;  in sl28vpd_add_cells()
122 		info.offset = pinfo->offset;  in sl28vpd_add_cells()
123 		info.bytes = pinfo->bytes;  in sl28vpd_add_cells()
124 		info.read_post_process = pinfo->read_post_process;  in sl28vpd_add_cells()
125 		info.np = of_get_child_by_name(layout_np, pinfo->name);  in sl28vpd_add_cells()
127 		ret = nvmem_add_one_cell(nvmem, &info);  in sl28vpd_add_cells()
139 static int sl28vpd_probe(struct nvmem_layout *layout)  in sl28vpd_probe()  argument
141 	layout->add_cells = sl28vpd_add_cells;  in sl28vpd_probe()
143 	return nvmem_layout_register(layout);  in sl28vpd_probe()
146 static void sl28vpd_remove(struct nvmem_layout *layout)  in sl28vpd_remove()  argument
148 	nvmem_layout_unregister(layout);  in sl28vpd_remove()
152 	{ .compatible = "kontron,sl28-vpd" },
159 		.name = "kontron-sl28vpd-layout",
169 MODULE_DESCRIPTION("NVMEM layout driver for the VPD of Kontron sl28 boards");