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List: lm-sensors
Subject: [lm-sensors] [RFC PATCH 5/8] input: Add support for DA906x PMIC OnKey detection.
From: Krystian Garbaciak <krystian.garbaciak () diasemi ! com>
Date: 2012-08-24 14:10:00
Message-ID: 201208241510 () sw-eng-lt-dc-vm2
[Download RAW message or body]
This driver creates input device that reports a key event on an OnKey button
release. The reported key code depends on the time, the button was holded for.
If holding time < 2 seconds - KEY_SLEEP is reported on button release,
otherwise KEY_POWER is reported after 2 seconds.
Signed-off-by: Krystian Garbaciak <krystian.garbaciak@diasemi.com>
---
drivers/input/misc/Kconfig | 6 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/da906x-onkey.c | 139 +++++++++++++++++++++++++++++++++++++
3 files changed, 146 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/misc/da906x-onkey.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 7c0f1ec..fd8d951 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -486,6 +486,12 @@ config INPUT_DA9052_ONKEY
To compile this driver as a module, choose M here: the
module will be called da9052_onkey.
+config INPUT_DA906X_ONKEY
+ tristate "Dialog DA906x OnKey"
+ depends on MFD_DA906X
+ help
+ Support for Dialog Semiconductor input onkey device.
+
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 83fe6f5..73406ac 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -23,6 +23,7 @@ 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-$(CONFIG_INPUT_DA906X_ONKEY) += da906x-onkey.o
obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o
obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o
obj-$(CONFIG_INPUT_GPIO_TILT_POLLED) += gpio_tilt_polled.o
diff --git a/drivers/input/misc/da906x-onkey.c b/drivers/input/misc/da906x-onkey.c
new file mode 100644
index 0000000..477c554
--- /dev/null
+++ b/drivers/input/misc/da906x-onkey.c
@@ -0,0 +1,139 @@
+/*
+ * OnKey device driver for Dialog DA906x PMIC
+ *
+ * Copyright 2012 Dialog Semiconductors Ltd.
+ *
+ * Author: <michal.hajduk@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/slab.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+
+#include <linux/mfd/da906x/core.h>
+#include <linux/mfd/da906x/registers.h>
+
+
+struct da906x_onkey {
+ struct da906x *da906x;
+ struct input_dev *input;
+ int irq;
+};
+
+static irqreturn_t da906x_onkey_irq_handler(int irq, void *data)
+{
+ struct da906x_onkey *onkey = data;
+ unsigned int code;
+ int ret;
+
+ ret = da906x_reg_read(onkey->da906x, DA906X_REG_STATUS_A);
+ if ((ret >= 0) && (ret & DA906X_NONKEY)) {
+ dev_notice(&onkey->input->dev, "KEY_POWER pressed.\n");
+ code = KEY_POWER;
+ } else {
+ dev_notice(&onkey->input->dev, "KEY_SLEEP pressed.\n");
+ code = KEY_SLEEP;
+ }
+
+ /* Interrupt raised for key release only,
+ so report consecutive button press and release. */
+ input_report_key(onkey->input, code, 1);
+ input_report_key(onkey->input, code, 0);
+ input_sync(onkey->input);
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit da906x_onkey_probe(struct platform_device *pdev)
+{
+ struct da906x *da906x = dev_get_drvdata(pdev->dev.parent);
+ struct da906x_onkey *onkey;
+ int ret = 0;
+
+ onkey = devm_kzalloc(&pdev->dev, sizeof(struct da906x_onkey),
+ GFP_KERNEL);
+ if (!onkey) {
+ dev_err(&pdev->dev, "Failed to allocate memory.\n");
+ return -ENOMEM;
+ }
+
+ onkey->input = input_allocate_device();
+ if (!onkey->input) {
+ dev_err(&pdev->dev, "Failed to allocated inpute device.\n");
+ return -ENOMEM;
+ }
+
+ onkey->irq = platform_get_irq_byname(pdev, DA906X_DRVNAME_ONKEY);
+ onkey->da906x = da906x;
+
+ onkey->input->evbit[0] = BIT_MASK(EV_KEY);
+ onkey->input->name = DA906X_DRVNAME_ONKEY;
+ onkey->input->phys = DA906X_DRVNAME_ONKEY "/input0";
+ onkey->input->dev.parent = &pdev->dev;
+ input_set_capability(onkey->input, EV_KEY, KEY_POWER);
+ input_set_capability(onkey->input, EV_KEY, KEY_SLEEP);
+
+ ret = request_threaded_irq(onkey->irq, NULL, da906x_onkey_irq_handler,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT, "ONKEY", onkey);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request IRQ.\n");
+ goto err_input;
+ }
+
+ ret = input_register_device(onkey->input);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to request IRQ.\n");
+ goto err_irq;
+ }
+
+ platform_set_drvdata(pdev, onkey);
+
+ /* Interrupt reacts on button release */
+ da906x_reg_update(da906x, DA906X_REG_CONFIG_I,
+ DA906X_NONKEY_PIN_MASK, DA906X_NONKEY_PIN_SWDOWN);
+
+ return 0;
+
+err_irq:
+ free_irq(onkey->da906x->irq_base + onkey->irq , onkey);
+err_input:
+ input_free_device(onkey->input);
+ return ret;
+}
+
+static int __devexit da906x_onkey_remove(struct platform_device *pdev)
+{
+ struct da906x_onkey *onkey = platform_get_drvdata(pdev);
+
+ free_irq(onkey->irq, onkey);
+ input_unregister_device(onkey->input);
+ return 0;
+}
+
+static struct platform_driver da906x_onkey_driver = {
+ .probe = da906x_onkey_probe,
+ .remove = __devexit_p(da906x_onkey_remove),
+ .driver = {
+ .name = DA906X_DRVNAME_ONKEY,
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(da906x_onkey_driver);
+
+MODULE_AUTHOR("Dialog Semiconductor <michal.hajduk@diasemi.com>");
+MODULE_DESCRIPTION("Onkey driver for DA906X");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("paltform:" DA906X_DRVNAME_ONKEY);
--
1.7.0.4
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