Loading...
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 | // SPDX-License-Identifier: GPL-2.0 // // Copyright (C) 2018 BayLibre SAS // Author: Bartosz Golaszewski <bgolaszewski@baylibre.com> // // ONKEY driver for MAXIM 77650/77651 charger/power-supply. #include <linux/i2c.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/mfd/max77650.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/regmap.h> #define MAX77650_ONKEY_MODE_MASK BIT(3) #define MAX77650_ONKEY_MODE_PUSH 0x00 #define MAX77650_ONKEY_MODE_SLIDE BIT(3) struct max77650_onkey { struct input_dev *input; unsigned int code; }; static irqreturn_t max77650_onkey_falling(int irq, void *data) { struct max77650_onkey *onkey = data; input_report_key(onkey->input, onkey->code, 0); input_sync(onkey->input); return IRQ_HANDLED; } static irqreturn_t max77650_onkey_rising(int irq, void *data) { struct max77650_onkey *onkey = data; input_report_key(onkey->input, onkey->code, 1); input_sync(onkey->input); return IRQ_HANDLED; } static int max77650_onkey_probe(struct platform_device *pdev) { int irq_r, irq_f, error, mode; struct max77650_onkey *onkey; struct device *dev, *parent; struct regmap *map; unsigned int type; dev = &pdev->dev; parent = dev->parent; map = dev_get_regmap(parent, NULL); if (!map) return -ENODEV; onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL); if (!onkey) return -ENOMEM; error = device_property_read_u32(dev, "linux,code", &onkey->code); if (error) onkey->code = KEY_POWER; if (device_property_read_bool(dev, "maxim,onkey-slide")) { mode = MAX77650_ONKEY_MODE_SLIDE; type = EV_SW; } else { mode = MAX77650_ONKEY_MODE_PUSH; type = EV_KEY; } error = regmap_update_bits(map, MAX77650_REG_CNFG_GLBL, MAX77650_ONKEY_MODE_MASK, mode); if (error) return error; irq_f = platform_get_irq_byname(pdev, "nEN_F"); if (irq_f < 0) return irq_f; irq_r = platform_get_irq_byname(pdev, "nEN_R"); if (irq_r < 0) return irq_r; onkey->input = devm_input_allocate_device(dev); if (!onkey->input) return -ENOMEM; onkey->input->name = "max77650_onkey"; onkey->input->phys = "max77650_onkey/input0"; onkey->input->id.bustype = BUS_I2C; input_set_capability(onkey->input, type, onkey->code); error = devm_request_any_context_irq(dev, irq_f, max77650_onkey_falling, IRQF_ONESHOT, "onkey-down", onkey); if (error < 0) return error; error = devm_request_any_context_irq(dev, irq_r, max77650_onkey_rising, IRQF_ONESHOT, "onkey-up", onkey); if (error < 0) return error; return input_register_device(onkey->input); } static const struct of_device_id max77650_onkey_of_match[] = { { .compatible = "maxim,max77650-onkey" }, { } }; MODULE_DEVICE_TABLE(of, max77650_onkey_of_match); static struct platform_driver max77650_onkey_driver = { .driver = { .name = "max77650-onkey", .of_match_table = max77650_onkey_of_match, }, .probe = max77650_onkey_probe, }; module_platform_driver(max77650_onkey_driver); MODULE_DESCRIPTION("MAXIM 77650/77651 ONKEY driver"); MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("platform:max77650-onkey"); |