Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* Copyright (c) 2013, The Linux Foundation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) static void __iomem *msm_ps_hold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static int deassert_pshold(struct notifier_block *nb, unsigned long action,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 			   void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	writel(0, msm_ps_hold);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	mdelay(10000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static struct notifier_block restart_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	.notifier_call = deassert_pshold,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	.priority = 128,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static void do_msm_poweroff(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	deassert_pshold(&restart_nb, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int msm_restart_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	struct resource *mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	msm_ps_hold = devm_ioremap_resource(dev, mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (IS_ERR(msm_ps_hold))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		return PTR_ERR(msm_ps_hold);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	register_restart_handler(&restart_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	pm_power_off = do_msm_poweroff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static const struct of_device_id of_msm_restart_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	{ .compatible = "qcom,pshold", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) MODULE_DEVICE_TABLE(of, of_msm_restart_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static struct platform_driver msm_restart_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	.probe = msm_restart_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		.name = "msm-restart",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		.of_match_table = of_match_ptr(of_msm_restart_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static int __init msm_restart_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	return platform_driver_register(&msm_restart_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) device_initcall(msm_restart_init);