power/reset/xgene-reboot.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * AppliedMicro X-Gene SoC Reboot Driver
9  * This driver provides system reboot functionality for APM X-Gene SoC.
11  * implements GPIO shutdown, use the gpio-poweroff.c driver.
19 #include <linux/reboot.h>
31 				 unsigned long mode, void *cmd)  in xgene_restart_handler()  argument
37 	/* Issue the reboot */  in xgene_restart_handler()
38 	writel(ctx->mask, ctx->csr);  in xgene_restart_handler()
42 	dev_emerg(ctx->dev, "Unable to restart system\n");  in xgene_restart_handler()
50 	struct device *dev = &pdev->dev;  in xgene_reboot_probe()
55 		return -ENOMEM;  in xgene_reboot_probe()
57 	ctx->csr = of_iomap(dev->of_node, 0);  in xgene_reboot_probe()
58 	if (!ctx->csr) {  in xgene_reboot_probe()
60 		return -ENODEV;  in xgene_reboot_probe()
63 	if (of_property_read_u32(dev->of_node, "mask", &ctx->mask))  in xgene_reboot_probe()
64 		ctx->mask = 0xFFFFFFFF;  in xgene_reboot_probe()
66 	ctx->dev = dev;  in xgene_reboot_probe()
67 	ctx->restart_handler.notifier_call = xgene_restart_handler;  in xgene_reboot_probe()
68 	ctx->restart_handler.priority = 128;  in xgene_reboot_probe()
69 	err = register_restart_handler(&ctx->restart_handler);  in xgene_reboot_probe()
71 		iounmap(ctx->csr);  in xgene_reboot_probe()
79 	{ .compatible = "apm,xgene-reboot" },
86 		.name = "xgene-reboot",