^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.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/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mfd/syscon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/reboot-mode.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) struct syscon_reboot_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct regmap *map;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct reboot_mode_driver reboot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) u32 offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static int syscon_reboot_mode_write(struct reboot_mode_driver *reboot,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) unsigned int magic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct syscon_reboot_mode *syscon_rbm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) syscon_rbm = container_of(reboot, struct syscon_reboot_mode, reboot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) ret = regmap_update_bits(syscon_rbm->map, syscon_rbm->offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) syscon_rbm->mask, magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) dev_err(reboot->dev, "update reboot mode bits failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) static int syscon_reboot_mode_read(struct reboot_mode_driver *reboot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct syscon_reboot_mode *syscon_rbm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u32 val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) syscon_rbm = container_of(reboot, struct syscon_reboot_mode, reboot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) regmap_read(syscon_rbm->map, syscon_rbm->offset, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static int syscon_reboot_mode_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct syscon_reboot_mode *syscon_rbm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) syscon_rbm = devm_kzalloc(&pdev->dev, sizeof(*syscon_rbm), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (!syscon_rbm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) syscon_rbm->reboot.dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) syscon_rbm->reboot.write = syscon_reboot_mode_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) syscon_rbm->reboot.read = syscon_reboot_mode_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) syscon_rbm->mask = 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) syscon_rbm->map = syscon_node_to_regmap(pdev->dev.parent->of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (IS_ERR(syscon_rbm->map))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return PTR_ERR(syscon_rbm->map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if (of_property_read_u32(pdev->dev.of_node, "offset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) &syscon_rbm->offset))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) of_property_read_u32(pdev->dev.of_node, "mask", &syscon_rbm->mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) ret = devm_reboot_mode_register(&pdev->dev, &syscon_rbm->reboot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) dev_err(&pdev->dev, "can't register reboot mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static const struct of_device_id syscon_reboot_mode_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) { .compatible = "syscon-reboot-mode" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) MODULE_DEVICE_TABLE(of, syscon_reboot_mode_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static struct platform_driver syscon_reboot_mode_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .probe = syscon_reboot_mode_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .name = "syscon-reboot-mode",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .of_match_table = syscon_reboot_mode_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) module_platform_driver(syscon_reboot_mode_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) MODULE_DESCRIPTION("SYSCON reboot mode driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags