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168 lines
4.2 KiB
168 lines
4.2 KiB
/* |
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* Texas Instruments' TPS65217 and TPS65218 Power Button Input Driver |
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* |
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* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ |
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* Author: Felipe Balbi <[email protected]> |
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* Author: Marcin Niestroj <[email protected]> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <linux/init.h> |
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#include <linux/input.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/mfd/tps65217.h> |
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#include <linux/mfd/tps65218.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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struct tps6521x_data { |
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unsigned int reg_status; |
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unsigned int pb_mask; |
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const char *name; |
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}; |
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static const struct tps6521x_data tps65217_data = { |
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.reg_status = TPS65217_REG_STATUS, |
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.pb_mask = TPS65217_STATUS_PB, |
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.name = "tps65217_pwrbutton", |
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}; |
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static const struct tps6521x_data tps65218_data = { |
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.reg_status = TPS65218_REG_STATUS, |
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.pb_mask = TPS65218_STATUS_PB_STATE, |
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.name = "tps65218_pwrbutton", |
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}; |
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struct tps6521x_pwrbutton { |
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struct device *dev; |
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struct regmap *regmap; |
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struct input_dev *idev; |
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const struct tps6521x_data *data; |
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char phys[32]; |
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}; |
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static const struct of_device_id of_tps6521x_pb_match[] = { |
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{ .compatible = "ti,tps65217-pwrbutton", .data = &tps65217_data }, |
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{ .compatible = "ti,tps65218-pwrbutton", .data = &tps65218_data }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, of_tps6521x_pb_match); |
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static irqreturn_t tps6521x_pb_irq(int irq, void *_pwr) |
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{ |
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struct tps6521x_pwrbutton *pwr = _pwr; |
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const struct tps6521x_data *tps_data = pwr->data; |
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unsigned int reg; |
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int error; |
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error = regmap_read(pwr->regmap, tps_data->reg_status, ®); |
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if (error) { |
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dev_err(pwr->dev, "can't read register: %d\n", error); |
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goto out; |
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} |
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if (reg & tps_data->pb_mask) { |
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input_report_key(pwr->idev, KEY_POWER, 1); |
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pm_wakeup_event(pwr->dev, 0); |
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} else { |
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input_report_key(pwr->idev, KEY_POWER, 0); |
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} |
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input_sync(pwr->idev); |
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out: |
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return IRQ_HANDLED; |
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} |
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static int tps6521x_pb_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct tps6521x_pwrbutton *pwr; |
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struct input_dev *idev; |
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const struct of_device_id *match; |
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int error; |
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int irq; |
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match = of_match_node(of_tps6521x_pb_match, dev->of_node); |
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if (!match) |
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return -ENXIO; |
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pwr = devm_kzalloc(dev, sizeof(*pwr), GFP_KERNEL); |
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if (!pwr) |
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return -ENOMEM; |
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pwr->data = match->data; |
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idev = devm_input_allocate_device(dev); |
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if (!idev) |
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return -ENOMEM; |
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idev->name = pwr->data->name; |
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snprintf(pwr->phys, sizeof(pwr->phys), "%s/input0", |
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pwr->data->name); |
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idev->phys = pwr->phys; |
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idev->dev.parent = dev; |
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idev->id.bustype = BUS_I2C; |
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input_set_capability(idev, EV_KEY, KEY_POWER); |
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pwr->regmap = dev_get_regmap(dev->parent, NULL); |
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pwr->dev = dev; |
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pwr->idev = idev; |
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device_init_wakeup(dev, true); |
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irq = platform_get_irq(pdev, 0); |
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if (irq < 0) |
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return -EINVAL; |
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error = devm_request_threaded_irq(dev, irq, NULL, tps6521x_pb_irq, |
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IRQF_TRIGGER_RISING | |
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IRQF_TRIGGER_FALLING | |
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IRQF_ONESHOT, |
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pwr->data->name, pwr); |
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if (error) { |
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dev_err(dev, "failed to request IRQ #%d: %d\n", irq, error); |
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return error; |
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} |
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error= input_register_device(idev); |
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if (error) { |
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dev_err(dev, "Can't register power button: %d\n", error); |
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return error; |
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} |
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return 0; |
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} |
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static const struct platform_device_id tps6521x_pwrbtn_id_table[] = { |
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{ "tps65218-pwrbutton", }, |
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{ "tps65217-pwrbutton", }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(platform, tps6521x_pwrbtn_id_table); |
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static struct platform_driver tps6521x_pb_driver = { |
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.probe = tps6521x_pb_probe, |
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.driver = { |
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.name = "tps6521x_pwrbutton", |
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.of_match_table = of_tps6521x_pb_match, |
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}, |
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.id_table = tps6521x_pwrbtn_id_table, |
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}; |
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module_platform_driver(tps6521x_pb_driver); |
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MODULE_DESCRIPTION("TPS6521X Power Button"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR("Felipe Balbi <[email protected]>");
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