forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
283 lines
7.2 KiB
283 lines
7.2 KiB
// 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/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_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; |
|
} |
|
|
|
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; |
|
|
|
input_set_capability(onkey->input, EV_KEY, KEY_POWER); |
|
|
|
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) |
|
return irq; |
|
|
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063, DA9062 and DA9061"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);
|
|
|