1 // SPDX-License-Identifier: GPL-2.0-only
3  * Amlogic Meson GX eFuse Driver
11 #include <linux/nvmem-provider.h>
36 	{ .compatible = "amlogic,meson-gxbb-efuse", },
43 	struct device *dev = &pdev->dev;  in meson_efuse_probe()
49 	unsigned int size;  in meson_efuse_probe()  local
52 	sm_np = of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0);  in meson_efuse_probe()
54 		dev_err(&pdev->dev, "no secure-monitor node\n");  in meson_efuse_probe()
55 		return -ENODEV;  in meson_efuse_probe()
61 		return -EPROBE_DEFER;  in meson_efuse_probe()
66 		if (ret != -EPROBE_DEFER)  in meson_efuse_probe()
67 			dev_err(dev, "failed to get efuse gate");  in meson_efuse_probe()
85 	if (meson_sm_call(fw, SM_EFUSE_USER_MAX, &size, 0, 0, 0, 0, 0) < 0) {  in meson_efuse_probe()
87 		return -EINVAL;  in meson_efuse_probe()
92 		return -ENOMEM;  in meson_efuse_probe()
94 	econfig->dev = dev;  in meson_efuse_probe()
95 	econfig->name = dev_name(dev);  in meson_efuse_probe()
96 	econfig->stride = 1;  in meson_efuse_probe()
97 	econfig->word_size = 1;  in meson_efuse_probe()
98 	econfig->reg_read = meson_efuse_read;  in meson_efuse_probe()
99 	econfig->reg_write = meson_efuse_write;  in meson_efuse_probe()
100 	econfig->size = size;  in meson_efuse_probe()
101 	econfig->priv = fw;  in meson_efuse_probe()
103 	nvmem = devm_nvmem_register(&pdev->dev, econfig);  in meson_efuse_probe()
111 		.name = "meson-efuse",