mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 20:06:39 +07:00
5179f0ce2f
This adds OnKey driver support for DA9063. Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
227 lines
5.8 KiB
C
227 lines
5.8 KiB
C
/*
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* OnKey device driver for DA9063
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* Copyright (C) 2015 Dialog Semiconductor Ltd.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/workqueue.h>
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#include <linux/regmap.h>
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#include <linux/of.h>
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#include <linux/mfd/da9063/core.h>
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#include <linux/mfd/da9063/pdata.h>
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#include <linux/mfd/da9063/registers.h>
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struct da9063_onkey {
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struct da9063 *hw;
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struct delayed_work work;
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struct input_dev *input;
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struct device *dev;
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bool key_power;
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};
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static void da9063_poll_on(struct work_struct *work)
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{
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struct da9063_onkey *onkey = container_of(work, struct da9063_onkey,
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work.work);
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unsigned int val;
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int fault_log = 0;
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bool poll = true;
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int error;
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/* Poll to see when the pin is released */
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error = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val);
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if (error) {
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dev_err(onkey->dev,
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"Failed to read ON status: %d\n", error);
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goto err_poll;
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}
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if (!(val & DA9063_NONKEY)) {
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error = regmap_update_bits(onkey->hw->regmap,
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DA9063_REG_CONTROL_B,
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DA9063_NONKEY_LOCK, 0);
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if (error) {
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dev_err(onkey->dev,
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"Failed to reset the Key Delay %d\n", error);
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goto err_poll;
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}
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input_report_key(onkey->input, KEY_POWER, 0);
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input_sync(onkey->input);
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poll = false;
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}
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/*
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* If the fault log KEY_RESET is detected, then clear it
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* and shut down the system.
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*/
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error = regmap_read(onkey->hw->regmap,
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DA9063_REG_FAULT_LOG, &fault_log);
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if (error) {
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dev_warn(&onkey->input->dev,
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"Cannot read FAULT_LOG: %d\n", error);
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} else if (fault_log & DA9063_KEY_RESET) {
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error = regmap_write(onkey->hw->regmap,
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DA9063_REG_FAULT_LOG,
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DA9063_KEY_RESET);
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if (error) {
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dev_warn(&onkey->input->dev,
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"Cannot reset KEY_RESET fault log: %d\n",
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error);
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} else {
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/* at this point we do any S/W housekeeping
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* and then send shutdown command
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*/
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dev_dbg(&onkey->input->dev,
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"Sending SHUTDOWN to DA9063 ...\n");
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error = regmap_write(onkey->hw->regmap,
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DA9063_REG_CONTROL_F,
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DA9063_SHUTDOWN);
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if (error)
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dev_err(&onkey->input->dev,
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"Cannot SHUTDOWN DA9063: %d\n",
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error);
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}
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}
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err_poll:
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if (poll)
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schedule_delayed_work(&onkey->work, msecs_to_jiffies(50));
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}
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static irqreturn_t da9063_onkey_irq_handler(int irq, void *data)
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{
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struct da9063_onkey *onkey = data;
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unsigned int val;
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int error;
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error = regmap_read(onkey->hw->regmap, DA9063_REG_STATUS_A, &val);
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if (onkey->key_power && !error && (val & DA9063_NONKEY)) {
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input_report_key(onkey->input, KEY_POWER, 1);
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input_sync(onkey->input);
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schedule_delayed_work(&onkey->work, 0);
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dev_dbg(onkey->dev, "KEY_POWER pressed.\n");
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} else {
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input_report_key(onkey->input, KEY_SLEEP, 1);
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input_sync(onkey->input);
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input_report_key(onkey->input, KEY_SLEEP, 0);
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input_sync(onkey->input);
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dev_dbg(onkey->dev, "KEY_SLEEP pressed.\n");
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}
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return IRQ_HANDLED;
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}
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static void da9063_cancel_poll(void *data)
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{
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struct da9063_onkey *onkey = data;
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cancel_delayed_work_sync(&onkey->work);
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}
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static int da9063_onkey_probe(struct platform_device *pdev)
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{
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struct da9063 *da9063 = dev_get_drvdata(pdev->dev.parent);
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struct da9063_pdata *pdata = dev_get_platdata(da9063->dev);
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struct da9063_onkey *onkey;
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int irq;
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int error;
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onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9063_onkey),
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GFP_KERNEL);
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if (!onkey) {
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dev_err(&pdev->dev, "Failed to allocate memory.\n");
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return -ENOMEM;
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}
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onkey->dev = &pdev->dev;
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onkey->hw = da9063;
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if (pdata)
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onkey->key_power = pdata->key_power;
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else
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onkey->key_power =
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!of_property_read_bool(pdev->dev.of_node,
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"dlg,disable-key-power");
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onkey->input = devm_input_allocate_device(&pdev->dev);
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if (!onkey->input) {
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dev_err(&pdev->dev, "Failed to allocated input device.\n");
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return -ENOMEM;
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}
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onkey->input->name = DA9063_DRVNAME_ONKEY;
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onkey->input->phys = DA9063_DRVNAME_ONKEY "/input0";
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onkey->input->dev.parent = &pdev->dev;
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if (onkey->key_power)
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input_set_capability(onkey->input, EV_KEY, KEY_POWER);
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input_set_capability(onkey->input, EV_KEY, KEY_SLEEP);
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INIT_DELAYED_WORK(&onkey->work, da9063_poll_on);
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error = devm_add_action(&pdev->dev, da9063_cancel_poll, onkey);
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if (error) {
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dev_err(&pdev->dev,
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"Failed to add cancel poll action: %d\n",
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error);
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return error;
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}
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irq = platform_get_irq_byname(pdev, "ONKEY");
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if (irq < 0) {
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error = irq;
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dev_err(&pdev->dev, "Failed to get platform IRQ: %d\n", error);
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return error;
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}
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error = devm_request_threaded_irq(&pdev->dev, irq,
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NULL, da9063_onkey_irq_handler,
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IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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"ONKEY", onkey);
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if (error) {
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dev_err(&pdev->dev,
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"Failed to request IRQ %d: %d\n", irq, error);
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return error;
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}
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error = input_register_device(onkey->input);
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if (error) {
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dev_err(&pdev->dev,
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"Failed to register input device: %d\n", error);
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return error;
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}
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platform_set_drvdata(pdev, onkey);
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return 0;
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}
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static struct platform_driver da9063_onkey_driver = {
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.probe = da9063_onkey_probe,
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.driver = {
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.name = DA9063_DRVNAME_ONKEY,
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},
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};
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module_platform_driver(da9063_onkey_driver);
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MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
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MODULE_DESCRIPTION("Onkey device driver for Dialog DA9063");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DA9063_DRVNAME_ONKEY);
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