mirror of https://github.com/OpenIPC/firmware.git
77 lines
1.8 KiB
Diff
77 lines
1.8 KiB
Diff
--- linux-4.9.37/drivers/power/reset/goke-reboot.c 1970-01-01 03:00:00.000000000 +0300
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+++ linux-4.9.y/drivers/power/reset/goke-reboot.c 2021-06-07 13:01:34.000000000 +0300
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@@ -0,0 +1,73 @@
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+/*
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+ * Copyright (c) Hunan Goke,Chengdu Goke,Shandong Goke. 2021. All rights reserved.
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+ */
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+
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+#include <linux/delay.h>
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+#include <linux/io.h>
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+#include <linux/module.h>
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+#include <linux/notifier.h>
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+#include <linux/of_address.h>
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+#include <linux/platform_device.h>
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+#include <linux/reboot.h>
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+
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+#include <asm/proc-fns.h>
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+
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+static void __iomem *base;
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+static u32 reboot_offset;
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+
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+static int bsp_restart_handler(struct notifier_block *this,
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+ unsigned long mode, void *cmd)
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+{
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+ writel_relaxed(0xdeadbeef, base + reboot_offset);
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+
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+ while (1)
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+ cpu_do_idle();
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+
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+ return NOTIFY_DONE;
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+}
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+
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+static struct notifier_block bsp_restart_nb = {
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+ .notifier_call = bsp_restart_handler,
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+ .priority = 128,
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+};
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+
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+static int bsp_reboot_probe(struct platform_device *pdev)
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+{
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+ struct device_node *np = pdev->dev.of_node;
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+ int err;
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+
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+ base = of_iomap(np, 0);
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+ if (!base) {
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+ WARN(1, "failed to map base address");
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+ return -ENODEV;
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+ }
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+
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+ if (of_property_read_u32(np, "reboot-offset", &reboot_offset) < 0) {
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+ pr_err("failed to find reboot-offset property\n");
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+ iounmap(base);
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+ return -EINVAL;
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+ }
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+
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+ err = register_restart_handler(&bsp_restart_nb);
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+ if (err) {
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+ dev_err(&pdev->dev, "cannot register restart handler (err=%d)\n",
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+ err);
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+ iounmap(base);
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+ }
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+
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+ return err;
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+}
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+
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+static const struct of_device_id bsp_reboot_of_match[] = {
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+ { .compatible = "goke,sysctrl" },
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+ {}
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+};
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+
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+static struct platform_driver bsp_reboot_driver = {
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+ .probe = bsp_reboot_probe,
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+ .driver = {
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+ .name = "goke-reboot",
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+ .of_match_table = bsp_reboot_of_match,
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+ },
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+};
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+module_platform_driver(bsp_reboot_driver);
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