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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | // SPDX-License-Identifier: GPL-2.0 // Copyright (C) STMicroelectronics 2018 // Author: Pascal Paillet <p.paillet@st.com> for STMicroelectronics. #include <linux/input.h> #include <linux/interrupt.h> #include <linux/mfd/stpmic1.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/regmap.h> /** * struct stpmic1_onkey - OnKey data * @input_dev: pointer to input device * @irq_falling: irq that we are hooked on to * @irq_rising: irq that we are hooked on to */ struct stpmic1_onkey { struct input_dev *input_dev; int irq_falling; int irq_rising; }; static irqreturn_t onkey_falling_irq(int irq, void *ponkey) { struct stpmic1_onkey *onkey = ponkey; struct input_dev *input_dev = onkey->input_dev; input_report_key(input_dev, KEY_POWER, 1); pm_wakeup_event(input_dev->dev.parent, 0); input_sync(input_dev); return IRQ_HANDLED; } static irqreturn_t onkey_rising_irq(int irq, void *ponkey) { struct stpmic1_onkey *onkey = ponkey; struct input_dev *input_dev = onkey->input_dev; input_report_key(input_dev, KEY_POWER, 0); pm_wakeup_event(input_dev->dev.parent, 0); input_sync(input_dev); return IRQ_HANDLED; } static int stpmic1_onkey_probe(struct platform_device *pdev) { struct stpmic1 *pmic = dev_get_drvdata(pdev->dev.parent); struct device *dev = &pdev->dev; struct input_dev *input_dev; struct stpmic1_onkey *onkey; unsigned int val, reg = 0; int error; onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL); if (!onkey) return -ENOMEM; onkey->irq_falling = platform_get_irq_byname(pdev, "onkey-falling"); if (onkey->irq_falling < 0) return onkey->irq_falling; onkey->irq_rising = platform_get_irq_byname(pdev, "onkey-rising"); if (onkey->irq_rising < 0) return onkey->irq_rising; if (!device_property_read_u32(dev, "power-off-time-sec", &val)) { if (val > 0 && val <= 16) { dev_dbg(dev, "power-off-time=%d seconds\n", val); reg |= PONKEY_PWR_OFF; reg |= ((16 - val) & PONKEY_TURNOFF_TIMER_MASK); } else { dev_err(dev, "power-off-time-sec out of range\n"); return -EINVAL; } } if (device_property_present(dev, "st,onkey-clear-cc-flag")) reg |= PONKEY_CC_FLAG_CLEAR; error = regmap_update_bits(pmic->regmap, PKEY_TURNOFF_CR, PONKEY_TURNOFF_MASK, reg); if (error) { dev_err(dev, "PKEY_TURNOFF_CR write failed: %d\n", error); return error; } if (device_property_present(dev, "st,onkey-pu-inactive")) { error = regmap_update_bits(pmic->regmap, PADS_PULL_CR, PONKEY_PU_INACTIVE, PONKEY_PU_INACTIVE); if (error) { dev_err(dev, "ONKEY Pads configuration failed: %d\n", error); return error; } } input_dev = devm_input_allocate_device(dev); if (!input_dev) { dev_err(dev, "Can't allocate Pwr Onkey Input Device\n"); return -ENOMEM; } input_dev->name = "pmic_onkey"; input_dev->phys = "pmic_onkey/input0"; input_set_capability(input_dev, EV_KEY, KEY_POWER); onkey->input_dev = input_dev; /* interrupt is nested in a thread */ error = devm_request_threaded_irq(dev, onkey->irq_falling, NULL, onkey_falling_irq, IRQF_ONESHOT, dev_name(dev), onkey); if (error) { dev_err(dev, "Can't get IRQ Onkey Falling: %d\n", error); return error; } error = devm_request_threaded_irq(dev, onkey->irq_rising, NULL, onkey_rising_irq, IRQF_ONESHOT, dev_name(dev), onkey); if (error) { dev_err(dev, "Can't get IRQ Onkey Rising: %d\n", error); return error; } error = input_register_device(input_dev); if (error) { dev_err(dev, "Can't register power button: %d\n", error); return error; } platform_set_drvdata(pdev, onkey); device_init_wakeup(dev, true); return 0; } static int __maybe_unused stpmic1_onkey_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct stpmic1_onkey *onkey = platform_get_drvdata(pdev); if (device_may_wakeup(dev)) { enable_irq_wake(onkey->irq_falling); enable_irq_wake(onkey->irq_rising); } return 0; } static int __maybe_unused stpmic1_onkey_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct stpmic1_onkey *onkey = platform_get_drvdata(pdev); if (device_may_wakeup(dev)) { disable_irq_wake(onkey->irq_falling); disable_irq_wake(onkey->irq_rising); } return 0; } static SIMPLE_DEV_PM_OPS(stpmic1_onkey_pm, stpmic1_onkey_suspend, stpmic1_onkey_resume); static const struct of_device_id of_stpmic1_onkey_match[] = { { .compatible = "st,stpmic1-onkey" }, { }, }; MODULE_DEVICE_TABLE(of, of_stpmic1_onkey_match); static struct platform_driver stpmic1_onkey_driver = { .probe = stpmic1_onkey_probe, .driver = { .name = "stpmic1_onkey", .of_match_table = of_match_ptr(of_stpmic1_onkey_match), .pm = &stpmic1_onkey_pm, }, }; module_platform_driver(stpmic1_onkey_driver); MODULE_DESCRIPTION("Onkey driver for STPMIC1"); MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>"); MODULE_LICENSE("GPL v2"); |