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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 | /* * Copyright (C) ST-Ericsson SA 2010 * * License Terms: GNU General Public License v2 * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson * * AB8500 Power-On Key handler */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/mfd/abx500/ab8500.h> #include <linux/of.h> #include <linux/slab.h> /** * struct ab8500_ponkey - ab8500 ponkey information * @input_dev: pointer to input device * @ab8500: ab8500 parent * @irq_dbf: irq number for falling transition * @irq_dbr: irq number for rising transition */ struct ab8500_ponkey { struct input_dev *idev; struct ab8500 *ab8500; int irq_dbf; int irq_dbr; }; /* AB8500 gives us an interrupt when ONKEY is held */ static irqreturn_t ab8500_ponkey_handler(int irq, void *data) { struct ab8500_ponkey *ponkey = data; if (irq == ponkey->irq_dbf) input_report_key(ponkey->idev, KEY_POWER, true); else if (irq == ponkey->irq_dbr) input_report_key(ponkey->idev, KEY_POWER, false); input_sync(ponkey->idev); return IRQ_HANDLED; } static int ab8500_ponkey_probe(struct platform_device *pdev) { struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); struct ab8500_ponkey *ponkey; struct input_dev *input; int irq_dbf, irq_dbr; int error; irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF"); if (irq_dbf < 0) { dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf); return irq_dbf; } irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR"); if (irq_dbr < 0) { dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr); return irq_dbr; } ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL); input = input_allocate_device(); if (!ponkey || !input) { error = -ENOMEM; goto err_free_mem; } ponkey->idev = input; ponkey->ab8500 = ab8500; ponkey->irq_dbf = irq_dbf; ponkey->irq_dbr = irq_dbr; input->name = "AB8500 POn(PowerOn) Key"; input->dev.parent = &pdev->dev; input_set_capability(input, EV_KEY, KEY_POWER); error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler, 0, "ab8500-ponkey-dbf", ponkey); if (error < 0) { dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n", ponkey->irq_dbf, error); goto err_free_mem; } error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler, 0, "ab8500-ponkey-dbr", ponkey); if (error < 0) { dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n", ponkey->irq_dbr, error); goto err_free_dbf_irq; } error = input_register_device(ponkey->idev); if (error) { dev_err(ab8500->dev, "Can't register input device: %d\n", error); goto err_free_dbr_irq; } platform_set_drvdata(pdev, ponkey); return 0; err_free_dbr_irq: free_irq(ponkey->irq_dbr, ponkey); err_free_dbf_irq: free_irq(ponkey->irq_dbf, ponkey); err_free_mem: input_free_device(input); kfree(ponkey); return error; } static int ab8500_ponkey_remove(struct platform_device *pdev) { struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev); free_irq(ponkey->irq_dbf, ponkey); free_irq(ponkey->irq_dbr, ponkey); input_unregister_device(ponkey->idev); kfree(ponkey); return 0; } #ifdef CONFIG_OF static const struct of_device_id ab8500_ponkey_match[] = { { .compatible = "stericsson,ab8500-ponkey", }, {} }; #endif static struct platform_driver ab8500_ponkey_driver = { .driver = { .name = "ab8500-poweron-key", .owner = THIS_MODULE, .of_match_table = of_match_ptr(ab8500_ponkey_match), }, .probe = ab8500_ponkey_probe, .remove = ab8500_ponkey_remove, }; module_platform_driver(ab8500_ponkey_driver); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>"); MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver"); |