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Subject[PATCHv1 11/11] INPUT/MISC/ONKEY: OnKey module of DA9052 PMICs driver
Hi Dmitry,

ONKEY Driver for Dialog Semiconductor DA9052 PMICs.

Changes made since last submission:
. made changes to error handling in probe function
. changed variable names to reflect their use
. Ported the driver to Linux kernel 2.6.38.2

Linux Kernel Version: 2.6.38.2

Signed-off-by: D. Chen <dchen@diasemi.com>
---
diff -Naur linux-2.6.38.2/drivers/input/misc/da9052_onkey.c wrk_linux-2.6.38.2/drivers/input/misc/da9052_onkey.c
--- linux-2.6.38.2/drivers/input/misc/da9052_onkey.c 1970-01-01 05:00:00.000000000 +0500
+++ wrk_linux-2.6.38.2/drivers/input/misc/da9052_onkey.c 2011-04-13 12:28:39.000000000 +0500
@@ -0,0 +1,165 @@
+/*
+ * ON pin driver for Dialog DA9052 PMICs
+ *
+ * Copyright(c) 2009 Dialog Semiconductor Ltd.
+ *
+ * Author: Dajun Chen <dchen@diasemi.com>
+ *
+ * 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)
+{
+ 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;
+ int error = 0;
+
+ 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) {
+ error = -ENOMEM;
+ dev_err(&pdev->dev, "Failed to allocate input device, %d\n",
+ error);
+ goto err_mem;
+ }
+ onkey->da9052 = dev_get_drvdata(pdev->dev.parent);
+ onkey->irq = platform_get_irq_byname(pdev, "ONKEY");
+ if (onkey->irq < 0) {
+ dev_err(&pdev->dev, "Failed to get an IRQ for input device, %d\n",
+ onkey->irq);
+ goto err_mem;
+ }
+
+ 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;
+
+ INIT_DELAYED_WORK(&onkey->work, da9052_onkey_work);
+
+ error = request_threaded_irq(onkey->da9052->irq_base + onkey->irq, NULL,
+ da9052_onkey_irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ "ONKEY", onkey);
+ if (error < 0) {
+ dev_err(onkey->da9052->dev,
+ " Failed to register %s IRQ %d, error = %d\n",
+ "ONKEY", onkey->da9052->irq_base + onkey->irq, error);
+ goto err_input;
+ }
+
+ error = input_register_device(onkey->input);
+ if (error) {
+ dev_err(&pdev->dev, "Unable to register input device, %d\n",
+ error);
+ goto err_reg;
+ }
+
+ platform_set_drvdata(pdev, onkey);
+
+ return 0;
+
+err_reg:
+ free_irq(onkey->da9052->irq_base + onkey->irq, NULL);
+err_input:
+ cancel_delayed_work_sync(&onkey->work);
+err_mem:
+ input_free_device(onkey->input);
+ kfree(onkey);
+ return error;
+}
+
+static int __devexit da9052_onkey_remove(struct platform_device *pdev)
+{
+ struct da9052_onkey *onkey = platform_get_drvdata(pdev);
+
+ free_irq(onkey->da9052->irq_base + onkey->irq, NULL);
+ cancel_delayed_work_sync(&onkey->work);
+ input_unregister_device(onkey->input);
+ kfree(onkey);
+
+ return 0;
+}
+
+static struct platform_driver da9052_onkey_driver = {
+ .driver = {
+ .name = "da9052-onkey",
+ .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@diasemi.com>");
+MODULE_DESCRIPTION("Onkey driver for DA9052");
diff -Naur linux-2.6.38.2/drivers/input/misc/Kconfig wrk_linux-2.6.38.2/drivers/input/misc/Kconfig
--- linux-2.6.38.2/drivers/input/misc/Kconfig 2011-03-27 23:37:20.000000000 +0500
+++ wrk_linux-2.6.38.2/drivers/input/misc/Kconfig 2011-04-13 12:28:53.000000000 +0500
@@ -353,6 +353,13 @@
To compile this driver as a module, choose M here: the
module will be called rb532_button.

+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.
+
config INPUT_DM355EVM
tristate "TI DaVinci DM355 EVM Keypad and IR Remote"
depends on MFD_DM355EVM_MSP
diff -Naur linux-2.6.38.2/drivers/input/misc/Makefile wrk_linux-2.6.38.2/drivers/input/misc/Makefile
--- linux-2.6.38.2/drivers/input/misc/Makefile 2011-03-27 23:37:20.000000000 +0500
+++ wrk_linux-2.6.38.2/drivers/input/misc/Makefile 2011-04-13 12:28:47.000000000 +0500
@@ -21,6 +21,7 @@
obj-$(CONFIG_INPUT_CMA3000) += cma3000_d0x.o
obj-$(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-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o
Regards,
Ashish J


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