| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // Power Button driver for RAVE SP |
| // |
| // Copyright (C) 2017 Zodiac Inflight Innovations |
| // |
| // |
| |
| #include <linux/input.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/mfd/rave-sp.h> |
| #include <linux/platform_device.h> |
| |
| #define RAVE_SP_EVNT_BUTTON_PRESS (RAVE_SP_EVNT_BASE + 0x00) |
| |
| struct rave_sp_power_button { |
| struct input_dev *idev; |
| struct notifier_block nb; |
| }; |
| |
| static int rave_sp_power_button_event(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| struct rave_sp_power_button *pb = |
| container_of(nb, struct rave_sp_power_button, nb); |
| const u8 event = rave_sp_action_unpack_event(action); |
| const u8 value = rave_sp_action_unpack_value(action); |
| struct input_dev *idev = pb->idev; |
| |
| if (event == RAVE_SP_EVNT_BUTTON_PRESS) { |
| input_report_key(idev, KEY_POWER, value); |
| input_sync(idev); |
| |
| return NOTIFY_STOP; |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static int rave_sp_pwrbutton_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct rave_sp_power_button *pb; |
| struct input_dev *idev; |
| int error; |
| |
| pb = devm_kzalloc(dev, sizeof(*pb), GFP_KERNEL); |
| if (!pb) |
| return -ENOMEM; |
| |
| idev = devm_input_allocate_device(dev); |
| if (!idev) |
| return -ENOMEM; |
| |
| idev->name = pdev->name; |
| |
| input_set_capability(idev, EV_KEY, KEY_POWER); |
| |
| error = input_register_device(idev); |
| if (error) |
| return error; |
| |
| pb->idev = idev; |
| pb->nb.notifier_call = rave_sp_power_button_event; |
| pb->nb.priority = 128; |
| |
| error = devm_rave_sp_register_event_notifier(dev, &pb->nb); |
| if (error) |
| return error; |
| |
| return 0; |
| } |
| |
| static const struct of_device_id rave_sp_pwrbutton_of_match[] = { |
| { .compatible = "zii,rave-sp-pwrbutton" }, |
| {} |
| }; |
| |
| static struct platform_driver rave_sp_pwrbutton_driver = { |
| .probe = rave_sp_pwrbutton_probe, |
| .driver = { |
| .name = KBUILD_MODNAME, |
| .of_match_table = rave_sp_pwrbutton_of_match, |
| }, |
| }; |
| module_platform_driver(rave_sp_pwrbutton_driver); |
| |
| MODULE_DEVICE_TABLE(of, rave_sp_pwrbutton_of_match); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Andrey Vostrikov <andrey.vostrikov@cogentembedded.com>"); |
| MODULE_AUTHOR("Nikita Yushchenko <nikita.yoush@cogentembedded.com>"); |
| MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); |
| MODULE_DESCRIPTION("RAVE SP Power Button driver"); |