2ce8284c31
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: David Lechner <david@lechnology.com> Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* AppliedMicro X-Gene SoC Reboot Driver
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*
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* Copyright (c) 2013, Applied Micro Circuits Corporation
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* Author: Feng Kan <fkan@apm.com>
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* Author: Loc Ho <lho@apm.com>
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*
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* This driver provides system reboot functionality for APM X-Gene SoC.
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* For system shutdown, this is board specify. If a board designer
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* implements GPIO shutdown, use the gpio-poweroff.c driver.
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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/notifier.h>
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#include <linux/of.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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#include <linux/stat.h>
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#include <linux/slab.h>
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struct xgene_reboot_context {
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struct device *dev;
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void *csr;
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u32 mask;
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struct notifier_block restart_handler;
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};
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static int xgene_restart_handler(struct notifier_block *this,
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unsigned long mode, void *cmd)
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{
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struct xgene_reboot_context *ctx =
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container_of(this, struct xgene_reboot_context,
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restart_handler);
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/* Issue the reboot */
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writel(ctx->mask, ctx->csr);
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mdelay(1000);
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dev_emerg(ctx->dev, "Unable to restart system\n");
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return NOTIFY_DONE;
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}
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static int xgene_reboot_probe(struct platform_device *pdev)
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{
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struct xgene_reboot_context *ctx;
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struct device *dev = &pdev->dev;
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int err;
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ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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ctx->csr = of_iomap(dev->of_node, 0);
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if (!ctx->csr) {
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dev_err(dev, "can not map resource\n");
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return -ENODEV;
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}
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if (of_property_read_u32(dev->of_node, "mask", &ctx->mask))
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ctx->mask = 0xFFFFFFFF;
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ctx->dev = dev;
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ctx->restart_handler.notifier_call = xgene_restart_handler;
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ctx->restart_handler.priority = 128;
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err = register_restart_handler(&ctx->restart_handler);
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if (err) {
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iounmap(ctx->csr);
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dev_err(dev, "cannot register restart handler (err=%d)\n", err);
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}
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return err;
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}
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static const struct of_device_id xgene_reboot_of_match[] = {
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{ .compatible = "apm,xgene-reboot" },
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{}
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};
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static struct platform_driver xgene_reboot_driver = {
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.probe = xgene_reboot_probe,
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.driver = {
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.name = "xgene-reboot",
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.of_match_table = xgene_reboot_of_match,
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},
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};
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static int __init xgene_reboot_init(void)
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{
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return platform_driver_register(&xgene_reboot_driver);
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}
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device_initcall(xgene_reboot_init);
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