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/*
* ASRMICRO PM80x EXTON2 driver
*
* Copyright: (C) Copyright 2024 ASR Microelectronics (Shanghai) Co., Ltd.
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of this
* archive for more details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/mfd/88pm80x.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/irq.h>
struct pm80x_exton2_info {
struct input_dev *idev;
struct device *dev;
struct pm80x_chip *pm80x;
struct regmap *map;
int irq;
};
/* 88PM80x gives us an interrupt when EXTON2 is held */
static irqreturn_t pm80x_exton2_handler(int irq, void *data)
{
struct pm80x_exton2_info *info = data;
int ret = 0;
unsigned int val;
ret = regmap_read(info->map, PM800_STATUS_1, &val);
if (ret < 0) {
dev_err(info->idev->dev.parent,
"failed to read status: %d\n", ret);
return IRQ_NONE;
}
val &= PM800_CHG_STS1;
if (val) {
pm_stay_awake(info->dev);
} else {
pm_wakeup_event(info->dev, 8000);
}
pr_info("pm80x_exton2 press = %x\n", !!val); /* sys-sanity */
input_report_key(info->idev, KEY_POWER, val);
input_sync(info->idev);
return IRQ_HANDLED;
}
static SIMPLE_DEV_PM_OPS(pm80x_exton2_pm_ops, pm80x_dev_suspend,
pm80x_dev_resume);
static int pm80x_exton2_dt_init(struct device_node *np,
struct pm80x_exton2_info *info)
{
return 0;
}
static int pm80x_exton2_probe(struct platform_device *pdev)
{
struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
struct device_node *node = pdev->dev.of_node;
struct pm80x_exton2_info *info;
int err;
if (CHIP_PM803 == chip->type || CHIP_PM801 == chip->type)
return -ENODEV;
info = kzalloc(sizeof(struct pm80x_exton2_info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->pm80x = chip;
info->irq = platform_get_irq(pdev, 0);
if (info->irq < 0) {
dev_err(&pdev->dev, "No IRQ resource!\n");
err = -EINVAL;
goto out;
}
info->map = info->pm80x->regmap;
if (!info->map) {
dev_err(&pdev->dev, "no regmap!\n");
err = -EINVAL;
goto out;
}
info->idev = input_allocate_device();
if (!info->idev) {
dev_err(&pdev->dev, "Failed to allocate input dev\n");
err = -ENOMEM;
goto out;
}
info->dev = &pdev->dev;
info->idev->name = "88pm80x_exton2";
info->idev->phys = "88pm80x_exton2/input0";
info->idev->id.bustype = BUS_I2C;
info->idev->dev.parent = &pdev->dev;
info->idev->evbit[0] = BIT_MASK(EV_KEY);
__set_bit(KEY_POWER, info->idev->keybit);
err = pm80x_exton2_dt_init(node, info);
if (err < 0) {
err = -ENODEV;
goto out_reg;
}
irq_set_status_flags(info->irq, IRQ_NOAUTOEN);
err = pm80x_request_irq(info->pm80x, info->irq, pm80x_exton2_handler,
IRQF_ONESHOT | IRQF_NO_SUSPEND,
"exton2", info);
if (err < 0) {
dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
info->irq, err);
goto out_reg;
}
err = input_register_device(info->idev);
if (err) {
dev_err(&pdev->dev, "Can't register input device: %d\n", err);
goto out_irq;
}
if (CHIP_PM813S_A0_ID == chip->chip_id ||
CHIP_PM813S_A1_ID == chip->chip_id)
regmap_update_bits(info->map, PM800_RTC_MISC4, 0xf0, 0x70);
else
regmap_update_bits(info->map, PM800_RTC_MISC4, 0xf0, 0xf0);
platform_set_drvdata(pdev, info);
/* set FAULT_WU_EN */
if (CHIP_PM803 == chip->type ||
CHIP_PM813 == chip->type)
regmap_update_bits(chip->regmap, PM800_RTC_MISC5, PM803_FAULT_WAKEUP_EN,
PM803_FAULT_WAKEUP_EN);
else
regmap_update_bits(chip->regmap, PM800_RTC_MISC5, PM800_FAULT_WAKEUP_EN,
PM800_FAULT_WAKEUP_EN);
/* need to set fault_wakeup for asr new pmics */
if (CHIP_PM802 == chip->type ||
CHIP_PM813_ID == chip->chip_id)
regmap_update_bits(chip->regmap, PM800_RTC_MISC5, PM800_FAULT_WAKEUP,
PM800_FAULT_WAKEUP);
else if (CHIP_PM803 == chip->type ||
CHIP_PM813S_A0_ID == chip->chip_id ||
CHIP_PM813S_A1_ID == chip->chip_id)
regmap_update_bits(chip->regmap, PM800_RTC_MISC5, PM803_FAULT_WAKEUP,
PM803_FAULT_WAKEUP);
/* OnKey runs timer => need wake-constraint {Press ... Release+mSec}
* (especially to avoid false-panic-emulation).
* device_init_wakeup() creates "88pm80x-ext2key"
* but pm_stay_awake(&info->idev->dev) doesn't as required
* Do NOT use the driver's name but the "exton2" instead.
*/
device_init_wakeup(info->dev, true);
enable_irq(info->irq);
return 0;
out_irq:
pm80x_free_irq(info->pm80x, info->irq, info);
out_reg:
input_free_device(info->idev);
out:
kfree(info);
return err;
}
static int pm80x_exton2_remove(struct platform_device *pdev)
{
struct pm80x_exton2_info *info = platform_get_drvdata(pdev);
disable_irq(info->irq);
pm80x_free_irq(info->pm80x, info->irq, info);
input_unregister_device(info->idev);
kfree(info);
return 0;
}
static void pm80x_exton2_shutdown(struct platform_device *pdev)
{
struct pm80x_exton2_info *info = platform_get_drvdata(pdev);
disable_irq(info->irq);
pm80x_free_irq(info->pm80x, info->irq, info);
return;
}
static const struct of_device_id pm80x_exton2_dt_match[] = {
{ .compatible = "88pm80x-ext2key", },
{ },
};
MODULE_DEVICE_TABLE(of, pm80x_exton2_dt_match);
static struct platform_driver pm80x_exton2_driver = {
.driver = {
.name = "88pm80x-ext2key",
.owner = THIS_MODULE,
.pm = &pm80x_exton2_pm_ops,
.of_match_table = of_match_ptr(pm80x_exton2_dt_match),
},
.probe = pm80x_exton2_probe,
.remove = pm80x_exton2_remove,
.shutdown = pm80x_exton2_shutdown,
};
module_platform_driver(pm80x_exton2_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ASRMICRO PM80x EXTON2 driver");
MODULE_AUTHOR("Xuhong Gao <xuhonggao@asrmicro.com>");
MODULE_ALIAS("platform:pm80x-exton2");