mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
6456fd7315
This provides a new input driver for supporting the power button on Basin Cove PMIC, found on Intel Merrifield-based devices. The driver follows the design used in intel_chtdc_ti_pwrbtn.c module. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Power-button driver for Basin Cove PMIC
|
|
*
|
|
* Copyright (c) 2019, Intel Corporation.
|
|
* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
|
*/
|
|
|
|
#include <linux/input.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/device.h>
|
|
#include <linux/mfd/intel_soc_pmic.h>
|
|
#include <linux/mfd/intel_soc_pmic_mrfld.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm_wakeirq.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define BCOVE_PBSTATUS 0x27
|
|
#define BCOVE_PBSTATUS_PBLVL BIT(4) /* 1 - release, 0 - press */
|
|
|
|
static irqreturn_t mrfld_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);
|
|
unsigned int state;
|
|
int ret;
|
|
|
|
ret = regmap_read(regmap, BCOVE_PBSTATUS, &state);
|
|
if (ret)
|
|
return IRQ_NONE;
|
|
|
|
dev_dbg(dev, "PBSTATUS=0x%x\n", state);
|
|
input_report_key(input, KEY_POWER, !(state & BCOVE_PBSTATUS_PBLVL));
|
|
input_sync(input);
|
|
|
|
regmap_update_bits(regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int mrfld_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, ret;
|
|
|
|
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->dev.parent = dev;
|
|
input_set_capability(input, EV_KEY, KEY_POWER);
|
|
ret = input_register_device(input);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dev_set_drvdata(dev, pmic->regmap);
|
|
|
|
ret = devm_request_threaded_irq(dev, irq, NULL, mrfld_pwrbtn_interrupt,
|
|
IRQF_ONESHOT | IRQF_SHARED, pdev->name,
|
|
input);
|
|
if (ret)
|
|
return ret;
|
|
|
|
regmap_update_bits(pmic->regmap, BCOVE_MIRQLVL1, BCOVE_LVL1_PWRBTN, 0);
|
|
regmap_update_bits(pmic->regmap, BCOVE_MPBIRQ, BCOVE_PBIRQ_PBTN, 0);
|
|
|
|
device_init_wakeup(dev, true);
|
|
dev_pm_set_wake_irq(dev, irq);
|
|
return 0;
|
|
}
|
|
|
|
static int mrfld_pwrbtn_remove(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
|
|
dev_pm_clear_wake_irq(dev);
|
|
device_init_wakeup(dev, false);
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id mrfld_pwrbtn_id_table[] = {
|
|
{ .name = "mrfld_bcove_pwrbtn" },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, mrfld_pwrbtn_id_table);
|
|
|
|
static struct platform_driver mrfld_pwrbtn_driver = {
|
|
.driver = {
|
|
.name = "mrfld_bcove_pwrbtn",
|
|
},
|
|
.probe = mrfld_pwrbtn_probe,
|
|
.remove = mrfld_pwrbtn_remove,
|
|
.id_table = mrfld_pwrbtn_id_table,
|
|
};
|
|
module_platform_driver(mrfld_pwrbtn_driver);
|
|
|
|
MODULE_DESCRIPTION("Power-button driver for Basin Cove PMIC");
|
|
MODULE_LICENSE("GPL v2");
|