// SPDX-License-Identifier: GPL-2.0
|
/*
|
* Power-button driver for Dollar Cove TI PMIC
|
* Copyright (C) 2014 Intel Corp
|
* Copyright (c) 2017 Takashi Iwai <tiwai@suse.de>
|
*/
|
|
#include <linux/input.h>
|
#include <linux/interrupt.h>
|
#include <linux/device.h>
|
#include <linux/mfd/intel_soc_pmic.h>
|
#include <linux/module.h>
|
#include <linux/platform_device.h>
|
#include <linux/pm_wakeirq.h>
|
#include <linux/slab.h>
|
|
#define CHTDC_TI_SIRQ_REG 0x3
|
#define SIRQ_PWRBTN_REL BIT(0)
|
|
static irqreturn_t chtdc_ti_pwrbtn_interrupt(int irq, void *dev_id)
|
{
|
struct input_dev *input = dev_id;
|
struct device *dev = input->dev.parent;
|
struct regmap *regmap = dev_get_drvdata(dev);
|
int state;
|
|
if (!regmap_read(regmap, CHTDC_TI_SIRQ_REG, &state)) {
|
dev_dbg(dev, "SIRQ_REG=0x%x\n", state);
|
input_report_key(input, KEY_POWER, !(state & SIRQ_PWRBTN_REL));
|
input_sync(input);
|
}
|
|
return IRQ_HANDLED;
|
}
|
|
static int chtdc_ti_pwrbtn_probe(struct platform_device *pdev)
|
{
|
struct device *dev = &pdev->dev;
|
struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);
|
struct input_dev *input;
|
int irq, err;
|
|
irq = platform_get_irq(pdev, 0);
|
if (irq < 0)
|
return irq;
|
input = devm_input_allocate_device(dev);
|
if (!input)
|
return -ENOMEM;
|
input->name = pdev->name;
|
input->phys = "power-button/input0";
|
input->id.bustype = BUS_HOST;
|
input_set_capability(input, EV_KEY, KEY_POWER);
|
err = input_register_device(input);
|
if (err)
|
return err;
|
|
dev_set_drvdata(dev, pmic->regmap);
|
|
err = devm_request_threaded_irq(dev, irq, NULL,
|
chtdc_ti_pwrbtn_interrupt,
|
0, KBUILD_MODNAME, input);
|
if (err)
|
return err;
|
|
device_init_wakeup(dev, true);
|
dev_pm_set_wake_irq(dev, irq);
|
return 0;
|
}
|
|
static int chtdc_ti_pwrbtn_remove(struct platform_device *pdev)
|
{
|
dev_pm_clear_wake_irq(&pdev->dev);
|
device_init_wakeup(&pdev->dev, false);
|
return 0;
|
}
|
|
static const struct platform_device_id chtdc_ti_pwrbtn_id_table[] = {
|
{ .name = "chtdc_ti_pwrbtn" },
|
{},
|
};
|
MODULE_DEVICE_TABLE(platform, chtdc_ti_pwrbtn_id_table);
|
|
static struct platform_driver chtdc_ti_pwrbtn_driver = {
|
.driver = {
|
.name = KBUILD_MODNAME,
|
},
|
.probe = chtdc_ti_pwrbtn_probe,
|
.remove = chtdc_ti_pwrbtn_remove,
|
.id_table = chtdc_ti_pwrbtn_id_table,
|
};
|
module_platform_driver(chtdc_ti_pwrbtn_driver);
|
|
MODULE_DESCRIPTION("Power-button driver for Dollar Cove TI PMIC");
|
MODULE_LICENSE("GPL v2");
|
