drivers/nvmem/zynqmp_nvmem.c

1 // SPDX-License-Identifier: GPL-2.0+
4  * Copyright (C) 2022 - 2023, Advanced Micro Devices, Inc.
7 #include <linux/dma-mapping.h>
9 #include <linux/nvmem-provider.h>
12 #include <linux/firmware/xlnx-zynqmp.h>
40  * struct xilinx_efuse - the basic structure
44  * @flag:	0 - represents efuse read and 1- represents efuse write
45  * @pufuserfuse:0 - represents non-puf efuses, offset is used for read/write
46  *		1 - represents puf user fuse row number.
74 		return -EOPNOTSUPP;  in zynqmp_efuse_access()
79 		return -EOPNOTSUPP;  in zynqmp_efuse_access()
82 	if (pufflag == 1 && flag == EFUSE_WRITE) {  in zynqmp_efuse_access()
88 			return -EOPNOTSUPP;  in zynqmp_efuse_access()
94 			return -EOPNOTSUPP;  in zynqmp_efuse_access()
101 		return -ENOMEM;  in zynqmp_efuse_access()
106 		ret = -ENOMEM;  in zynqmp_efuse_access()
112 		efuse->flag = EFUSE_WRITE;  in zynqmp_efuse_access()
114 		efuse->flag = EFUSE_READ;  in zynqmp_efuse_access()
117 	efuse->src = dma_buf;  in zynqmp_efuse_access()
118 	efuse->size = words;  in zynqmp_efuse_access()
119 	efuse->offset = offset;  in zynqmp_efuse_access()
120 	efuse->pufuserfuse = pufflag;  in zynqmp_efuse_access()
126 			ret = -EOPNOTSUPP;  in zynqmp_efuse_access()
129 			ret = -EPERM;  in zynqmp_efuse_access()
155 		pufflag = 1;  in zynqmp_nvmem_read()
161 			return -EOPNOTSUPP;  in zynqmp_nvmem_read()
191 		return -EOPNOTSUPP;  in zynqmp_nvmem_write()
194 		pufflag = 1;  in zynqmp_nvmem_write()
201 	{ .compatible = "xlnx,zynqmp-nvmem-fw", },
208 	struct device *dev = &pdev->dev;  in zynqmp_nvmem_probe()
211 	econfig.name = "zynqmp-nvmem";  in zynqmp_nvmem_probe()
213 	econfig.word_size = 1;  in zynqmp_nvmem_probe()
226 		.name = "zynqmp-nvmem",
234 MODULE_DESCRIPTION("ZynqMP NVMEM driver");