1 // SPDX-License-Identifier: GPL-2.0-or-later
18 	struct regmap *map;  member
21 	u32 mask;  member
25 static int syscon_restart_handle(struct notifier_block *this,  in syscon_restart_handle()
33 	regmap_update_bits(ctx->map, ctx->offset, ctx->mask, ctx->value);  in syscon_restart_handle()
41 static int syscon_reboot_probe(struct platform_device *pdev)  in syscon_reboot_probe()
44 	struct device *dev = &pdev->dev;  in syscon_reboot_probe()
45 	int mask_err, value_err;  in syscon_reboot_probe()
46 	int priority;  in syscon_reboot_probe()
47 	int err;  in syscon_reboot_probe()
49 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);  in syscon_reboot_probe()
51 		return -ENOMEM;  in syscon_reboot_probe()
53 	ctx->map = syscon_regmap_lookup_by_phandle(dev->of_node, "regmap");  in syscon_reboot_probe()
54 	if (IS_ERR(ctx->map)) {  in syscon_reboot_probe()
55 		ctx->map = syscon_node_to_regmap(dev->parent->of_node);  in syscon_reboot_probe()
56 		if (IS_ERR(ctx->map))  in syscon_reboot_probe()
57 			return PTR_ERR(ctx->map);  in syscon_reboot_probe()
60 	if (of_property_read_s32(pdev->dev.of_node, "priority", &priority))  in syscon_reboot_probe()
63 	if (of_property_read_u32(pdev->dev.of_node, "offset", &ctx->offset))  in syscon_reboot_probe()
64 		return -EINVAL;  in syscon_reboot_probe()
66 	value_err = of_property_read_u32(pdev->dev.of_node, "value", &ctx->value);  in syscon_reboot_probe()
67 	mask_err = of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask);  in syscon_reboot_probe()
69 		dev_err(dev, "unable to read 'value' and 'mask'");  in syscon_reboot_probe()
70 		return -EINVAL;  in syscon_reboot_probe()
75 		ctx->value = ctx->mask;  in syscon_reboot_probe()
76 		ctx->mask = 0xFFFFFFFF;  in syscon_reboot_probe()
78 		/* support value without mask*/  in syscon_reboot_probe()
79 		ctx->mask = 0xFFFFFFFF;  in syscon_reboot_probe()
82 	ctx->restart_handler.notifier_call = syscon_restart_handle;  in syscon_reboot_probe()
83 	ctx->restart_handler.priority = priority;  in syscon_reboot_probe()
84 	err = register_restart_handler(&ctx->restart_handler);  in syscon_reboot_probe()
92 	{ .compatible = "syscon-reboot" },
99 		.name = "syscon-reboot",