// SPDX-License-Identifier: GPL-2.0-or-later
/*
* OnKey device driver for DA9063, DA9062 and DA9061 PMICs
* Copyright (C) 2015 Dialog Semiconductor Ltd.
*/
#include <linux/devm-helpers.h>
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/pm_wakeirq.h>
#include <linux/property.h>
#include <linux/workqueue.h>
#include <linux/regmap.h>
#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/registers.h>
#include <linux/mfd/da9062/core.h>
#include <linux/mfd/da9062/registers.h>
struct da906x_chip_config {
/* REGS */
int onkey_status;
int onkey_pwr_signalling;
int onkey_fault_log;
int onkey_shutdown;
/* MASKS */
int onkey_nonkey_mask;
int onkey_nonkey_lock_mask;
int onkey_key_reset_mask;
int onkey_shutdown_mask;
/* NAMES */
const char *name;
};
struct da9063_onkey {
struct delayed_work work;
struct input_dev *input;
struct device *dev;
struct regmap *regmap;
const struct da906x_chip_config *config;
char phys[32];
bool key_power;
};
static const struct da906x_chip_config da9063_regs = {
/* REGS */
.onkey_status = DA9063_REG_STATUS_A,
.onkey_pwr_signalling = DA9063_REG_CONTROL_B,
.onkey_fault_log = DA9063_REG_FAULT_LOG,
.onkey_shutdown = DA9063_REG_CONTROL_F,
/* MASKS */
.onkey_nonkey_mask = DA9063_NONKEY,
.onkey_nonkey_lock_mask = DA9063_NONKEY_LOCK,
.onkey_key_reset_mask = DA9063_KEY_RESET,
.onkey_shutdown_mask = DA9063_SHUTDOWN,
/* NAMES */
.name = DA9063_DRVNAME_ONKEY,
};
static const struct da906x_chip_config da9062_regs = {
/* REGS */
.onkey_status = DA9062AA_STATUS_A,
.onkey_pwr_signalling = DA9062AA_CONTROL_B,
.onkey_fault_log = DA9062AA_FAULT_LOG,
.onkey_shutdown = DA9062AA_CONTROL_F,
/* MASKS */
.onkey_nonkey_mask = DA9062AA_NONKEY_MASK,
.onkey_nonkey_lock_mask = DA9062AA_NONKEY_LOCK_MASK,
.onkey_key_reset_mask = DA9062AA_KEY_RESET_MASK,
.onkey_shutdown_mask = DA9062AA_SHUTDOWN_MASK,
/* NAMES */
.name = "da9062-onkey",
};
static void da9063_poll_on(struct work_struct *work)
{
struct da9063_onkey *onkey = container_of(work,
struct da9063_onkey,
work.work);
const struct da906x_chip_config *config = onkey->config;
unsigned int val;
int fault_log = 0;
bool poll = true;
int error;
/* Poll to see when the pin is released */
error = regmap_read(onkey->regmap,
config->onkey_status,
&val);
if (error) {
dev_err(onkey->dev,
"Failed to read ON status: %d\n", error);
goto err_poll;
}
if (!(val & config->onkey_nonkey_mask)) {
error = regmap_update_bits(onkey->regmap,
config->onkey_pwr_signalling,
config->onkey_nonkey_lock_mask,
0);
if (error) {
dev_err(onkey->dev,
"Failed to reset the Key Delay %d\n", error);
goto err_poll;
}
input_report_key(onkey->input, KEY_POWER, 0);
input_sync(onkey->input);
poll = false;
}
/*
* If the fault log KEY_RESET is detected, then clear it
* and shut down the system.
*/
error = regmap_read(onkey->regmap,
config->onkey_fault_log,
&fault_log);
if (error) {
dev_warn(&onkey->input->dev,
"Cannot read FAULT_LOG: %d\n", error);
} else if (fault_log & config->onkey_key_reset_mask) {
error = regmap_write(onkey->regmap,
config->onkey_fault_log,
config->onkey_key_reset_mask);
if (error) {
dev_warn(&onkey->input->dev,
"Cannot reset KEY_RESET fault log: %d\n",
error);
} else {
/* at this point we do any S/W housekeeping
* and then send shutdown command
*/
dev_dbg(&onkey->input->dev,
"Sending SHUTDOWN to PMIC ...\n");
error = regmap_write(onkey->regmap,
config->onkey_shutdown,
config->onkey_shutdown_mask);
if (error)
dev_err(&onkey->input->dev,
"Cannot SHUTDOWN PMIC: %d\n",
error);
}
}
err_poll:
if (poll)
schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
}
static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
{
struct da9063_onkey *onkey = data;
const struct da906x_chip_config *config = onkey->config;
unsigned int val;
int error;
error = regmap_read(onkey->regmap,
config->onkey_status,
&val);
if (onkey->key_power && !error && (val & config->onkey_nonkey_mask)) {
input_report_key(onkey->input, KEY_POWER, 1);
input_sync(onkey->input);
schedule_delayed_work(&onkey->work, 0);
dev_dbg(onkey->dev, "KEY_POWER long press.\n");
} else {
input_report_key(onkey->input, KEY_POWER, 1);
input_sync(onkey->input);
input_report_key(onkey->input, KEY_POWER, 0);
input_sync(onkey->input);
dev_dbg(onkey->dev, "KEY_POWER short press.\n");
}
return IRQ_HANDLED;
}
static int da9063_onkey_probe(struct platform_device *pdev)
{
struct da9063_onkey *onkey;
int error;
int irq;
onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
GFP_KERNEL);
if (!onkey)
return -ENOMEM;
onkey->config = device_get_match_data(&pdev->dev);
if (!onkey->config)
return -ENXIO;
onkey->dev = &pdev->dev;
onkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!onkey->regmap)
return dev_err_probe(&pdev->dev, -ENXIO,
"Parent regmap unavailable.\n");
onkey->key_power = !device_property_read_bool(&pdev->dev,
"dlg,disable-key-power");
onkey->input = devm_input_allocate_device(&pdev->dev);
if (!onkey->input)
return -ENOMEM;
onkey->input->name = onkey->config->name;
snprintf(onkey->phys, sizeof(onkey->phys), "%s/input0",
onkey->config->name);
onkey->input->phys = onkey->phys;
input_set_capability(onkey->input, EV_KEY, KEY_POWER);
error = devm_delayed_work_autocancel(&pdev->dev, &onkey->work,
da9063_poll_on);
if (error)
return error;
irq = platform_get_irq_byname(pdev, "ONKEY");
if (irq < 0)
return irq;
error = devm_request_threaded_irq(&pdev->dev, irq,
NULL, da9063_onkey_irq_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"ONKEY", onkey);
if (error)
return dev_err_probe(&pdev->dev, error,
"Failed to allocate onkey IRQ\n");
error = dev_pm_set_wake_irq(&pdev->dev, irq);
if (error)
dev_warn(&pdev->dev,
"Failed to set IRQ %d as a wake IRQ: %d\n",
irq, error);
else
device_init_wakeup(&pdev->dev, true);
error = input_register_device(onkey->input);
if (error)
return error;
return 0;
}
static const struct of_device_id da9063_compatible_reg_id_table[] = {
{ .compatible = "dlg,da9063-onkey", .data = &da9063_regs },
{ .compatible = "dlg,da9062-onkey", .data = &da9062_regs },
{ }
};
MODULE_DEVICE_TABLE(of, da9063_compatible_reg_id_table);
static struct platform_driver da9063_onkey_driver = {
.probe = da9063_onkey_probe,
.driver = {
.name = DA9063_DRVNAME_ONKEY,
.of_match_table = da9063_compatible_reg_id_table,
},
};
module_platform_driver(da9063_onkey_driver);
MODULE_AUTHOR("S Twiss <[email protected]>");
MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063, DA9062 and DA9061");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);
Codebase Browser
linux