1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Generic Syscon Reboot Driver
14 #include <linux/reboot.h>
39 					unsigned long mode, void *cmd)  in syscon_restart_handle()  argument
46 	if (ctx->rd) {  in syscon_restart_handle()
47 		if (mode < ARRAY_SIZE(ctx->rd->mode_bits) &&  in syscon_restart_handle()
48 		    ctx->rd->mode_bits[mode].valid)  in syscon_restart_handle()
49 			mode_bits = &ctx->rd->mode_bits[mode];  in syscon_restart_handle()
51 			mode_bits = &ctx->rd->catchall;  in syscon_restart_handle()
53 		mode_bits = &ctx->catchall;  in syscon_restart_handle()
56 	/* Issue the reboot */  in syscon_restart_handle()
57 	regmap_update_bits(ctx->map, mode_bits->offset, mode_bits->mask,  in syscon_restart_handle()
58 			   mode_bits->value);  in syscon_restart_handle()
69 	struct device *dev = &pdev->dev;  in syscon_reboot_probe()
73 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);  in syscon_reboot_probe()
75 		return -ENOMEM;  in syscon_reboot_probe()
77 	ctx->map = syscon_regmap_lookup_by_phandle(dev->of_node, "regmap");  in syscon_reboot_probe()
78 	if (IS_ERR(ctx->map)) {  in syscon_reboot_probe()
79 		ctx->map = syscon_node_to_regmap(dev->parent->of_node);  in syscon_reboot_probe()
80 		if (IS_ERR(ctx->map))  in syscon_reboot_probe()
81 			return PTR_ERR(ctx->map);  in syscon_reboot_probe()
84 	if (of_property_read_s32(pdev->dev.of_node, "priority", &priority))  in syscon_reboot_probe()
87 	ctx->rd = of_device_get_match_data(dev);  in syscon_reboot_probe()
88 	if (!ctx->rd) {  in syscon_reboot_probe()
91 		if (of_property_read_u32(pdev->dev.of_node, "offset",  in syscon_reboot_probe()
92 					 &ctx->catchall.offset) &&  in syscon_reboot_probe()
93 		    of_property_read_u32(pdev->dev.of_node, "reg",  in syscon_reboot_probe()
94 					 &ctx->catchall.offset))  in syscon_reboot_probe()
95 			return -EINVAL;  in syscon_reboot_probe()
97 		value_err = of_property_read_u32(pdev->dev.of_node, "value",  in syscon_reboot_probe()
98 						 &ctx->catchall.value);  in syscon_reboot_probe()
99 		mask_err = of_property_read_u32(pdev->dev.of_node, "mask",  in syscon_reboot_probe()
100 						&ctx->catchall.mask);  in syscon_reboot_probe()
103 			return -EINVAL;  in syscon_reboot_probe()
108 			ctx->catchall.value = ctx->catchall.mask;  in syscon_reboot_probe()
109 			ctx->catchall.mask = 0xFFFFFFFF;  in syscon_reboot_probe()
112 			ctx->catchall.mask = 0xFFFFFFFF;  in syscon_reboot_probe()
116 	ctx->restart_handler.notifier_call = syscon_restart_handle;  in syscon_reboot_probe()
117 	ctx->restart_handler.priority = priority;  in syscon_reboot_probe()
118 	err = register_restart_handler(&ctx->restart_handler);  in syscon_reboot_probe()
148 	{ .compatible = "google,gs101-reboot", .data = &gs101_reboot_data  },
149 	{ .compatible = "syscon-reboot" },
156 		.name = "syscon-reboot",