[PATCHv1 11/11] INPUT/MISC/ONKEY: OnKey module of DA9052 PMICsdriver
From: Ashish Jangam
Date: Wed Apr 06 2011 - 07:55:01 EST
Hi Dmitry,
ONKEY Driver for Dialog Semiconductor DA9052 PMICs.
Changes made since last submission:
. read and write operation moved to MFD
. added workqueue to notify onkey events
Some additional information of this patch:
. This patch is thoroughly tested with the Samsung 6410 board using I2C connectivity.
. Workqueue is added to toggle the KEY_POWER event.
Linux Kernel Version: 2.6.37
Signed-off-by: D. Chen <dchen@xxxxxxxxxxx>
---
diff -Naur orig_linux-2.6.37/drivers/input/misc/da9052_onkey.c linux-2.6.37/drivers/input/misc/da9052_onkey.c
--- orig_linux-2.6.37/drivers/input/misc/da9052_onkey.c 1970-01-01 05:00:00.000000000 +0500
+++ linux-2.6.37/drivers/input/misc/da9052_onkey.c 2011-03-31 19:28:59.000000000 +0500
@@ -0,0 +1,150 @@
+/*
+ * da9052_onkey.c -- ON pin driver for Dialog DA9052 PMICs
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * Author: Dajun Chen <dchen@xxxxxxxxxxx>
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+
+struct da9052_onkey {
+ struct da9052 *da9052;
+ struct input_dev *input;
+ struct delayed_work work;
+ int irq;
+};
+
+static void da9052_onkey_work(struct work_struct *work)
+{
+ unsigned int ret;
+ struct da9052_onkey *onkey;
+ onkey = container_of(work, struct da9052_onkey, work.work);
+
+ ret = da9052_reg_read(onkey->da9052, DA9052_EVENT_B_REG);
+ if (ret < 0) {
+ dev_err(onkey->da9052->dev,
+ "da9052_onkey_report_event da9052_reg_read error %d\n",
+ ret);
+ ret = 1;
+ } else {
+ ret = ret & DA9052_E_nONKEY;
+ input_report_key(onkey->input, KEY_POWER, ret);
+ input_sync(onkey->input);
+ }
+
+ if (ret)
+ schedule_delayed_work(&onkey->work, 10);
+
+}
+
+
+static irqreturn_t da9052_onkey_irq(int irq, void *data)
+{
+ struct da9052_onkey *onkey = (struct da9052_onkey *) data;
+
+ schedule_delayed_work(&onkey->work, 0);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit da9052_onkey_probe(struct platform_device *pdev)
+{
+ struct da9052_onkey *onkey;
+ unsigned int ret;
+
+ onkey = kzalloc(sizeof(*onkey), GFP_KERNEL);
+ if (!onkey) {
+ dev_err(&pdev->dev, "Failed to allocate memory \n");
+ return -ENOMEM;
+ }
+ onkey->input = input_allocate_device();
+ if (!onkey->input) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev, "Failed to allocate input device, %d\n", ret);
+ goto err_mem;
+ }
+ onkey->da9052 = dev_get_drvdata(pdev->dev.parent);
+ onkey->irq = platform_get_irq_byname(pdev, "ONKEY");
+
+ onkey->input->evbit[0] = BIT_MASK(EV_KEY);
+ onkey->input->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
+ onkey->input->name = "da9052-onkey";
+ onkey->input->phys = "da9052-onkey/input0";
+ onkey->input->dev.parent = &pdev->dev;
+
+ ret = input_register_device(onkey->input);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to register input\
+ device, %d\n", ret);
+ goto err_input;
+ }
+
+ INIT_DELAYED_WORK(&onkey->work, da9052_onkey_work);
+
+ ret = da9052_request_irq(onkey->da9052, onkey->irq,
+ da9052_onkey_irq, "ONKEY", onkey);
+ if (ret < 0)
+ goto err_input;
+
+ platform_set_drvdata(pdev, onkey);
+
+ return 0;
+
+err_input:
+ input_unregister_device(onkey->input);
+ cancel_delayed_work_sync(&onkey->work);
+err_mem:
+ kfree(onkey);
+ return ret;
+}
+
+static int __devexit da9052_onkey_remove(struct platform_device *pdev)
+{
+ struct da9052_onkey *onkey = pdev->dev.platform_data;
+
+ cancel_delayed_work_sync(&onkey->work);
+ input_unregister_device(onkey->input);
+ da9052_free_irq(onkey->da9052, onkey->irq, NULL);
+ kfree(onkey);
+
+ return 0;
+}
+
+static struct platform_driver da9052_onkey_driver = {
+ .driver.name = "da9052-onkey",
+ .driver.owner = THIS_MODULE,
+ .probe = da9052_onkey_probe,
+ .remove = __devexit_p(da9052_onkey_remove),
+};
+
+static int __init da9052_onkey_init(void)
+{
+ return platform_driver_register(&da9052_onkey_driver);
+}
+
+static void __exit da9052_onkey_exit(void)
+{
+ platform_driver_unregister(&da9052_onkey_driver);
+}
+
+module_init(da9052_onkey_init);
+module_exit(da9052_onkey_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Dajun Chen <dchen@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("Onkey driver for DA9052");
+MODULE_ALIAS("platform:da9052-onkey");
diff -Naur orig_linux-2.6.37/drivers/input/misc/Kconfig linux-2.6.37/drivers/input/misc/Kconfig
--- orig_linux-2.6.37/drivers/input/misc/Kconfig 2011-01-05 05:50:19.000000000 +0500
+++ linux-2.6.37/drivers/input/misc/Kconfig 2011-03-31 19:29:14.000000000 +0500
@@ -32,6 +32,16 @@
To compile this driver as a module, choose M here: the module
will be called ab8500-ponkey.
+config INPUT_DA9052_ONKEY
+ tristate "Dialog DA9052 Onkey"
+ depends on PMIC_DA9052
+ help
+ Support the ONKEY of Dialog DA9052 PMICs as an input device
+ reporting power button status.
+
+ To compile this driver as a module, choose M here: the module
+ will be called da9052_onkey.
+
config INPUT_AD714X
tristate "Analog Devices AD714x Capacitance Touch Sensor"
help
diff -Naur orig_linux-2.6.37/drivers/input/misc/Makefile linux-2.6.37/drivers/input/misc/Makefile
--- orig_linux-2.6.37/drivers/input/misc/Makefile 2011-01-05 05:50:19.000000000 +0500
+++ linux-2.6.37/drivers/input/misc/Makefile 2011-03-31 19:29:21.000000000 +0500
@@ -5,6 +5,7 @@
# Each configuration option enables a list of files.
obj-$(CONFIG_INPUT_88PM860X_ONKEY) += 88pm860x_onkey.o
+obj-$(CONFIG_INPUT_DA9052_ONKEY) += da9052_onkey.o
obj-$(CONFIG_INPUT_AB8500_PONKEY) += ab8500-ponkey.o
obj-$(CONFIG_INPUT_AD714X) += ad714x.o
obj-$(CONFIG_INPUT_AD714X_I2C) += ad714x-i2c.o
Regards,
Ashish
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