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Subject[PATCH V1 4/6] input: misc: onkey: da9062: DA9062 OnKey driver
From: S Twiss <stwiss.opensource@diasemi.com>

Add OnKey driver support for DA9062

Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>

---

This patch applies against linux-next and v4.0



drivers/input/misc/Kconfig | 10 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/da9062-onkey.c | 223 ++++++++++++++++++++++++++++++++++++++
3 files changed, 234 insertions(+)
create mode 100644 drivers/input/misc/da9062-onkey.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 6deb8da..472ca38 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -586,6 +586,16 @@ config INPUT_DA9055_ONKEY
To compile this driver as a module, choose M here: the module
will be called da9055_onkey.

+config INPUT_DA9062_ONKEY
+ tristate "Dialog DA9062 OnKey"
+ depends on MFD_DA9062
+ help
+ Support the ONKEY of Dialog DA9062 Power Management IC as an
+ input device reporting power button status.
+
+ To compile this driver as a module, choose M here: the module
+ will be called da9062-onkey.
+
config INPUT_DM355EVM
tristate "TI DaVinci DM355 EVM Keypad and IR Remote"
depends on MFD_DM355EVM_MSP
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 403a1a5..a631283 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o
obj-$(CONFIG_INPUT_COBALT_BTNS) += cobalt_btns.o
obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o
obj-$(CONFIG_INPUT_DA9055_ONKEY) += da9055_onkey.o
+obj-$(CONFIG_INPUT_DA9062_ONKEY) += da9062-onkey.o
obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
obj-$(CONFIG_INPUT_E3X0_BUTTON) += e3x0-button.o
obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o
diff --git a/drivers/input/misc/da9062-onkey.c b/drivers/input/misc/da9062-onkey.c
new file mode 100644
index 0000000..c4c0295
--- /dev/null
+++ b/drivers/input/misc/da9062-onkey.c
@@ -0,0 +1,223 @@
+/*
+ * da9062-onkey.c - ONKEY device driver for DA9062
+ * 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/da9062/core.h>
+#include <linux/mfd/da9062/registers.h>
+
+struct da9062_onkey {
+ struct da9062 *hw;
+ struct delayed_work work;
+ struct input_dev *input;
+ int irq;
+ bool key_power;
+};
+
+static void da9062_poll_on(struct work_struct *work)
+{
+ struct da9062_onkey *onkey = container_of(work, struct da9062_onkey,
+ work.work);
+ unsigned int val;
+ int fault_log = 0;
+ bool poll = true;
+ int ret;
+
+ /* poll to see when the pin is released */
+ ret = regmap_read(onkey->hw->regmap, DA9062AA_STATUS_A, &val);
+ if (ret < 0) {
+ dev_err(&onkey->input->dev,
+ "Failed to read ON status: %d\n", ret);
+ goto err_poll;
+ }
+
+ if (!(val & DA9062AA_NONKEY_MASK)) {
+ ret = regmap_update_bits(onkey->hw->regmap,
+ DA9062AA_CONTROL_B,
+ DA9062AA_NONKEY_LOCK_MASK, 0);
+ if (ret < 0) {
+ dev_err(&onkey->input->dev,
+ "Failed to reset the Key Delay %d\n", ret);
+ 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 shutdown DA9062 via I2C
+ */
+ ret = regmap_read(onkey->hw->regmap, DA9062AA_FAULT_LOG, &fault_log);
+ if (ret < 0)
+ dev_warn(&onkey->input->dev, "Cannot read FAULT_LOG\n");
+
+ if (fault_log & DA9062AA_KEY_RESET_MASK) {
+ ret = regmap_write(onkey->hw->regmap,
+ DA9062AA_FAULT_LOG,
+ DA9062AA_KEY_RESET_MASK);
+ if (ret < 0)
+ dev_warn(&onkey->input->dev,
+ "Cannot reset KEY_RESET fault log\n");
+ else {
+ /* at this point we do any S/W housekeeping
+ * and then send shutdown command
+ */
+ dev_info(&onkey->input->dev,
+ "Sending SHUTDOWN to DA9062 ...\n");
+ ret = regmap_write(onkey->hw->regmap,
+ DA9062AA_CONTROL_F,
+ DA9062AA_SHUTDOWN_MASK);
+ if (ret < 0)
+ dev_err(&onkey->input->dev,
+ "Cannot SHUTDOWN DA9062\n");
+ }
+ }
+
+err_poll:
+ if (poll)
+ schedule_delayed_work(&onkey->work, 50);
+}
+
+static irqreturn_t da9062_onkey_irq_handler(int irq, void *data)
+{
+ struct da9062_onkey *onkey = data;
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(onkey->hw->regmap, DA9062AA_STATUS_A, &val);
+ if (onkey->key_power && (ret >= 0) && (val & DA9062AA_NONKEY_MASK)) {
+ input_report_key(onkey->input, KEY_POWER, 1);
+ input_sync(onkey->input);
+ schedule_delayed_work(&onkey->work, 0);
+ dev_notice(&onkey->input->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_notice(&onkey->input->dev, "KEY_SLEEP pressed.\n");
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int da9062_onkey_probe(struct platform_device *pdev)
+{
+ struct da9062 *chip = dev_get_drvdata(pdev->dev.parent);
+ struct da9062_onkey *onkey;
+ bool kp_tmp = true;
+ int ret = 0;
+
+ kp_tmp = of_property_read_bool((&pdev->dev)->of_node,
+ "dlg,disable-key-power");
+ kp_tmp = !kp_tmp;
+
+
+ onkey = devm_kzalloc(&pdev->dev, sizeof(struct da9062_onkey),
+ GFP_KERNEL);
+ if (!onkey) {
+ dev_err(&pdev->dev, "Failed to allocate memory.\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ INIT_DELAYED_WORK(&onkey->work, da9062_poll_on);
+
+ onkey->input = devm_input_allocate_device(&pdev->dev);
+ if (!onkey->input) {
+ dev_err(&pdev->dev, "Failed to allocated input device.\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ ret = platform_get_irq_byname(pdev, "ONKEY");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to get platform IRQ.\n");
+ goto err;
+ }
+ onkey->irq = ret;
+
+ ret = request_threaded_irq(onkey->irq, NULL,
+ da9062_onkey_irq_handler,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "ONKEY", onkey);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to request input device IRQ.\n");
+ goto err;
+ }
+
+ onkey->hw = chip;
+ onkey->key_power = kp_tmp;
+ onkey->input->evbit[0] = BIT_MASK(EV_KEY);
+ onkey->input->name = "da9062-onkey";
+ onkey->input->phys = "da9062-onkey/input0";
+ 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);
+
+ ret = input_register_device(onkey->input);
+ if (ret) {
+ dev_err(&pdev->dev,
+ "Failed to register input device.\n");
+ goto err_irq;
+ }
+
+ platform_set_drvdata(pdev, onkey);
+ return 0;
+
+err_irq:
+ free_irq(onkey->irq, onkey);
+ cancel_delayed_work_sync(&onkey->work);
+err:
+ return ret;
+}
+
+static int da9062_onkey_remove(struct platform_device *pdev)
+{
+ struct da9062_onkey *onkey = platform_get_drvdata(pdev);
+
+ free_irq(onkey->irq, onkey);
+ cancel_delayed_work_sync(&onkey->work);
+ input_unregister_device(onkey->input);
+ return 0;
+}
+
+static struct platform_driver da9062_onkey_driver = {
+ .probe = da9062_onkey_probe,
+ .remove = da9062_onkey_remove,
+ .driver = {
+ .name = "da9062-onkey",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(da9062_onkey_driver);
+
+MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");
+MODULE_DESCRIPTION("ONKEY device driver for Dialog DA9062");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform: da9062-onkey");
--
end-of-patch for PATCH V1


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