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linux-next/drivers/input/misc/da9063_onkey.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version 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

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] 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

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

297 lines
7.6 KiB
C

// 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/module.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/workqueue.h>
#include <linux/regmap.h>
#include <linux/of.h>
#include <linux/mfd/da9063/core.h>
#include <linux/mfd/da9063/pdata.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 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 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 void da9063_cancel_poll(void *data)
{
struct da9063_onkey *onkey = data;
cancel_delayed_work_sync(&onkey->work);
}
static int da9063_onkey_probe(struct platform_device *pdev)
{
struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
struct da9063_pdata *pdata = dev_get_platdata(da9063->dev);
struct da9063_onkey *onkey;
const struct of_device_id *match;
int irq;
int error;
match = of_match_node(da9063_compatible_reg_id_table,
pdev->dev.of_node);
if (!match)
return -ENXIO;
onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
GFP_KERNEL);
if (!onkey) {
dev_err(&pdev->dev, "Failed to allocate memory.\n");
return -ENOMEM;
}
onkey->config = match->data;
onkey->dev = &pdev->dev;
onkey->regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (!onkey->regmap) {
dev_err(&pdev->dev, "Parent regmap unavailable.\n");
return -ENXIO;
}
if (pdata)
onkey->key_power = pdata->key_power;
else
onkey->key_power =
!of_property_read_bool(pdev->dev.of_node,
"dlg,disable-key-power");
onkey->input = devm_input_allocate_device(&pdev->dev);
if (!onkey->input) {
dev_err(&pdev->dev, "Failed to allocated input device.\n");
return -ENOMEM;
}
onkey->input->name = onkey->config->name;
snprintf(onkey->phys, sizeof(onkey->phys), "%s/input0",
onkey->config->name);
onkey->input->phys = onkey->phys;
onkey->input->dev.parent = &pdev->dev;
if (onkey->key_power)
input_set_capability(onkey->input, EV_KEY, KEY_POWER);
input_set_capability(onkey->input, EV_KEY, KEY_SLEEP);
INIT_DELAYED_WORK(&onkey->work, da9063_poll_on);
error = devm_add_action(&pdev->dev, da9063_cancel_poll, onkey);
if (error) {
dev_err(&pdev->dev,
"Failed to add cancel poll action: %d\n",
error);
return error;
}
irq = platform_get_irq_byname(pdev, "ONKEY");
if (irq < 0) {
error = irq;
dev_err(&pdev->dev, "Failed to get platform IRQ: %d\n", error);
return error;
}
error = devm_request_threaded_irq(&pdev->dev, irq,
NULL, da9063_onkey_irq_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"ONKEY", onkey);
if (error) {
dev_err(&pdev->dev,
"Failed to request IRQ %d: %d\n", irq, error);
return error;
}
error = input_register_device(onkey->input);
if (error) {
dev_err(&pdev->dev,
"Failed to register input device: %d\n", error);
return error;
}
return 0;
}
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 <stwiss.opensource@diasemi.com>");
MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063, DA9062 and DA9061");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);