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