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