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3da8d71754
The static global variable sysc_base2 is no longer used outside the probe method and the reset handler, so it can be converted to a local variable, and passed to the reset handler via its callback data. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/35f04935c48ae55dc562071e0a1d6fca65234a58.1708944642.git.geert+renesas@glider.be Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Renesas R-Mobile Reset Driver
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*
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* Copyright (C) 2014 Glider bvba
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*/
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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/printk.h>
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#include <linux/reboot.h>
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/* SYSC Register Bank 2 */
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#define RESCNT2 0x20 /* Reset Control Register 2 */
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/* Reset Control Register 2 */
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#define RESCNT2_PRES 0x80000000 /* Soft power-on reset */
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static int rmobile_reset_handler(struct sys_off_data *data)
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{
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void __iomem *sysc_base2 = (void __iomem *)data->cb_data;
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/* Let's assume we have acquired the HPB semaphore */
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writel(RESCNT2_PRES, sysc_base2 + RESCNT2);
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return NOTIFY_DONE;
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}
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static int rmobile_reset_probe(struct platform_device *pdev)
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{
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void __iomem *sysc_base2;
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int error;
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sysc_base2 = devm_platform_ioremap_resource(pdev, 1);
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if (IS_ERR(sysc_base2))
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return PTR_ERR(sysc_base2);
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error = devm_register_sys_off_handler(&pdev->dev,
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SYS_OFF_MODE_RESTART,
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SYS_OFF_PRIO_HIGH,
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rmobile_reset_handler,
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(__force void *)sysc_base2);
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if (error) {
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dev_err(&pdev->dev,
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"cannot register restart handler (err=%d)\n", error);
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return error;
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}
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return 0;
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}
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static const struct of_device_id rmobile_reset_of_match[] = {
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{ .compatible = "renesas,sysc-rmobile", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, rmobile_reset_of_match);
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static struct platform_driver rmobile_reset_driver = {
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.probe = rmobile_reset_probe,
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.driver = {
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.name = "rmobile_reset",
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.of_match_table = rmobile_reset_of_match,
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},
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};
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module_platform_driver(rmobile_reset_driver);
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MODULE_DESCRIPTION("Renesas R-Mobile Reset Driver");
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MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
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MODULE_LICENSE("GPL v2");
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