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- /*
- * OnKey device driver for DA9063 and DA9062 PMICs
- * Copyright (C) 2015 Dialog Semiconductor Ltd.
- *
- * 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.
- */
- #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 },
- { },
- };
- 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 DA9063 ...\n");
- error = regmap_write(onkey->regmap,
- config->onkey_shutdown,
- config->onkey_shutdown_mask);
- if (error)
- dev_err(&onkey->input->dev,
- "Cannot SHUTDOWN DA9063: %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 pressed.\n");
- } else {
- input_report_key(onkey->input, KEY_SLEEP, 1);
- input_sync(onkey->input);
- input_report_key(onkey->input, KEY_SLEEP, 0);
- input_sync(onkey->input);
- dev_dbg(onkey->dev, "KEY_SLEEP pressed.\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;
- }
- platform_set_drvdata(pdev, onkey);
- 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 and DA9062");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);
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