1*62f0f079SAndrey Smirnov // SPDX-License-Identifier: GPL-2.0+ 2*62f0f079SAndrey Smirnov // 3*62f0f079SAndrey Smirnov // Power Button driver for RAVE SP 4*62f0f079SAndrey Smirnov // 5*62f0f079SAndrey Smirnov // Copyright (C) 2017 Zodiac Inflight Innovations 6*62f0f079SAndrey Smirnov // 7*62f0f079SAndrey Smirnov // 8*62f0f079SAndrey Smirnov 9*62f0f079SAndrey Smirnov #include <linux/input.h> 10*62f0f079SAndrey Smirnov #include <linux/kernel.h> 11*62f0f079SAndrey Smirnov #include <linux/module.h> 12*62f0f079SAndrey Smirnov #include <linux/mfd/rave-sp.h> 13*62f0f079SAndrey Smirnov #include <linux/platform_device.h> 14*62f0f079SAndrey Smirnov 15*62f0f079SAndrey Smirnov #define RAVE_SP_EVNT_BUTTON_PRESS (RAVE_SP_EVNT_BASE + 0x00) 16*62f0f079SAndrey Smirnov 17*62f0f079SAndrey Smirnov struct rave_sp_power_button { 18*62f0f079SAndrey Smirnov struct input_dev *idev; 19*62f0f079SAndrey Smirnov struct notifier_block nb; 20*62f0f079SAndrey Smirnov }; 21*62f0f079SAndrey Smirnov 22*62f0f079SAndrey Smirnov static int rave_sp_power_button_event(struct notifier_block *nb, 23*62f0f079SAndrey Smirnov unsigned long action, void *data) 24*62f0f079SAndrey Smirnov { 25*62f0f079SAndrey Smirnov struct rave_sp_power_button *pb = 26*62f0f079SAndrey Smirnov container_of(nb, struct rave_sp_power_button, nb); 27*62f0f079SAndrey Smirnov const u8 event = rave_sp_action_unpack_event(action); 28*62f0f079SAndrey Smirnov const u8 value = rave_sp_action_unpack_value(action); 29*62f0f079SAndrey Smirnov struct input_dev *idev = pb->idev; 30*62f0f079SAndrey Smirnov 31*62f0f079SAndrey Smirnov if (event == RAVE_SP_EVNT_BUTTON_PRESS) { 32*62f0f079SAndrey Smirnov input_report_key(idev, KEY_POWER, value); 33*62f0f079SAndrey Smirnov input_sync(idev); 34*62f0f079SAndrey Smirnov 35*62f0f079SAndrey Smirnov return NOTIFY_STOP; 36*62f0f079SAndrey Smirnov } 37*62f0f079SAndrey Smirnov 38*62f0f079SAndrey Smirnov return NOTIFY_DONE; 39*62f0f079SAndrey Smirnov } 40*62f0f079SAndrey Smirnov 41*62f0f079SAndrey Smirnov static int rave_sp_pwrbutton_probe(struct platform_device *pdev) 42*62f0f079SAndrey Smirnov { 43*62f0f079SAndrey Smirnov struct device *dev = &pdev->dev; 44*62f0f079SAndrey Smirnov struct rave_sp_power_button *pb; 45*62f0f079SAndrey Smirnov struct input_dev *idev; 46*62f0f079SAndrey Smirnov int error; 47*62f0f079SAndrey Smirnov 48*62f0f079SAndrey Smirnov pb = devm_kzalloc(dev, sizeof(*pb), GFP_KERNEL); 49*62f0f079SAndrey Smirnov if (!pb) 50*62f0f079SAndrey Smirnov return -ENOMEM; 51*62f0f079SAndrey Smirnov 52*62f0f079SAndrey Smirnov idev = devm_input_allocate_device(dev); 53*62f0f079SAndrey Smirnov if (!idev) 54*62f0f079SAndrey Smirnov return -ENOMEM; 55*62f0f079SAndrey Smirnov 56*62f0f079SAndrey Smirnov idev->name = pdev->name; 57*62f0f079SAndrey Smirnov 58*62f0f079SAndrey Smirnov input_set_capability(idev, EV_KEY, KEY_POWER); 59*62f0f079SAndrey Smirnov 60*62f0f079SAndrey Smirnov error = input_register_device(idev); 61*62f0f079SAndrey Smirnov if (error) 62*62f0f079SAndrey Smirnov return error; 63*62f0f079SAndrey Smirnov 64*62f0f079SAndrey Smirnov pb->idev = idev; 65*62f0f079SAndrey Smirnov pb->nb.notifier_call = rave_sp_power_button_event; 66*62f0f079SAndrey Smirnov pb->nb.priority = 128; 67*62f0f079SAndrey Smirnov 68*62f0f079SAndrey Smirnov error = devm_rave_sp_register_event_notifier(dev, &pb->nb); 69*62f0f079SAndrey Smirnov if (error) 70*62f0f079SAndrey Smirnov return error; 71*62f0f079SAndrey Smirnov 72*62f0f079SAndrey Smirnov return 0; 73*62f0f079SAndrey Smirnov } 74*62f0f079SAndrey Smirnov 75*62f0f079SAndrey Smirnov static const struct of_device_id rave_sp_pwrbutton_of_match[] = { 76*62f0f079SAndrey Smirnov { .compatible = "zii,rave-sp-pwrbutton" }, 77*62f0f079SAndrey Smirnov {} 78*62f0f079SAndrey Smirnov }; 79*62f0f079SAndrey Smirnov 80*62f0f079SAndrey Smirnov static struct platform_driver rave_sp_pwrbutton_driver = { 81*62f0f079SAndrey Smirnov .probe = rave_sp_pwrbutton_probe, 82*62f0f079SAndrey Smirnov .driver = { 83*62f0f079SAndrey Smirnov .name = KBUILD_MODNAME, 84*62f0f079SAndrey Smirnov .of_match_table = rave_sp_pwrbutton_of_match, 85*62f0f079SAndrey Smirnov }, 86*62f0f079SAndrey Smirnov }; 87*62f0f079SAndrey Smirnov module_platform_driver(rave_sp_pwrbutton_driver); 88*62f0f079SAndrey Smirnov 89*62f0f079SAndrey Smirnov MODULE_DEVICE_TABLE(of, rave_sp_pwrbutton_of_match); 90*62f0f079SAndrey Smirnov MODULE_LICENSE("GPL"); 91*62f0f079SAndrey Smirnov MODULE_AUTHOR("Andrey Vostrikov <andrey.vostrikov@cogentembedded.com>"); 92*62f0f079SAndrey Smirnov MODULE_AUTHOR("Nikita Yushchenko <nikita.yoush@cogentembedded.com>"); 93*62f0f079SAndrey Smirnov MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); 94*62f0f079SAndrey Smirnov MODULE_DESCRIPTION("RAVE SP Power Button driver"); 95