[PATCH 1/3] input: misc: Support NI Ettus Research USRP E3x0 Button
From: Moritz Fischer
Date: Thu Jan 08 2015 - 16:03:40 EST
Signed-off-by: Moritz Fischer <moritz.fischer@xxxxxxxxx>
---
drivers/input/misc/Kconfig | 10 +++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/e3x0-button.c | 153 +++++++++++++++++++++++++++++++++++++++
3 files changed, 164 insertions(+)
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 23297ab..84a56b4 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -93,6 +93,16 @@ config INPUT_BMA150
To compile this driver as a module, choose M here: the
module will be called bma150.
+config INPUT_E3X0_BUTTON
+ tristate "NI Ettus Research USRP E3x0 Button support."
+ default n
+ help
+ Say Y here to enable support for the NI Ettus Research
+ USRP E3x0 Button.
+
+ To compile this driver as a module, choose M here: the
+ module will be called e3x0_button.
+
config INPUT_PCSPKR
tristate "PC Speaker support"
depends on PCSPKR_PLATFORM
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 19c7603..b1775a5 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -26,6 +26,7 @@ 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_DM355EVM) += dm355evm_keys.o
+obj-$(CONFIG_INPUT_E3X0_BUTTON) += e3x0-button.o
obj-$(CONFIG_INPUT_DRV260X_HAPTICS) += drv260x.o
obj-$(CONFIG_INPUT_DRV2667_HAPTICS) += drv2667.o
obj-$(CONFIG_INPUT_GP2A) += gp2ap002a00f.o
diff --git a/drivers/input/misc/e3x0-button.c b/drivers/input/misc/e3x0-button.c
new file mode 100644
index 0000000..0022f6a
--- /dev/null
+++ b/drivers/input/misc/e3x0-button.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2014, National Instruments Corp. All rights reserved.
+ *
+ * Driver for NI Ettus Research USRP E3x0 Button Driver
+ *
+ * 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; version 2 of the License.
+ *
+ * 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/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+
+/**
+ * struct e3x0_button - e3x0 button information
+ * @input_dev: pointer to input device
+ * @irq_press: irq number for press event
+ * @irq_release: irq number for release event
+ */
+struct e3x0_button {
+ struct input_dev *idev;
+ int irq_press;
+ int irq_release;
+};
+
+static irqreturn_t e3x0_button_handler(int irq, void *data)
+{
+ struct e3x0_button *button = data;
+
+ if (irq == button->irq_press)
+ input_report_key(button->idev, KEY_POWER, 1);
+ else if (irq == button->irq_release)
+ input_report_key(button->idev, KEY_POWER, 0);
+
+ input_sync(button->idev);
+
+ return IRQ_HANDLED;
+}
+
+static int e3x0_button_probe(struct platform_device *pdev)
+{
+ struct e3x0_button *button;
+ struct input_dev *input;
+ int irq_press, irq_release;
+ int error;
+
+ irq_press = platform_get_irq_byname(pdev, "press");
+ if (irq_press < 0) {
+ dev_err(&pdev->dev, "No IRQ for 'press', error=%d\n",
+ irq_press);
+ return irq_press;
+ }
+
+ irq_release = platform_get_irq_byname(pdev, "release");
+ if (irq_release < 0) {
+ dev_err(&pdev->dev, "No IRQ for 'release', error=%d\n",
+ irq_release);
+ return irq_release;
+ }
+
+ button = devm_kzalloc(&pdev->dev, sizeof(*button),
+ GFP_KERNEL);
+ if (!button)
+ return -ENOMEM;
+
+ input = devm_input_allocate_device(&pdev->dev);
+ if (!input)
+ return -ENOMEM;
+
+ button->idev = input;
+ button->irq_press = irq_press;
+ button->irq_release = irq_release;
+
+ input->name = "NI Ettus Research USRP E3x0 Button Driver";
+ input->phys = "e3x0_button/input0";
+ input->dev.parent = &pdev->dev;
+
+ input_set_capability(input, EV_KEY, KEY_POWER);
+
+ error = devm_request_irq(&pdev->dev, button->irq_press,
+ e3x0_button_handler, 0,
+ "e3x0-button", button);
+ if (error < 0) {
+ dev_err(&pdev->dev, "Failed to request 'press' IRQ#%d: %d\n",
+ button->irq_press, error);
+ return error;
+ }
+
+ error = devm_request_irq(&pdev->dev, button->irq_release,
+ e3x0_button_handler, 0,
+ "e3x0-button", button);
+ if (error < 0) {
+ dev_err(&pdev->dev, "Failed to request 'release' IRQ#%d: %d\n",
+ button->irq_release, error);
+ return error;
+ }
+
+ error = input_register_device(button->idev);
+ if (error) {
+ dev_err(&pdev->dev, "Can't register input device: %d\n", error);
+ return error;
+ }
+
+ platform_set_drvdata(pdev, button);
+ return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id e3x0_button_match[] = {
+ { .compatible = "ettus,e3x0-button", },
+ {}
+};
+MODULE_DEVICE_TABLE(of, e3x0_button_match);
+#endif
+
+static struct platform_driver e3x0_button_driver = {
+ .driver = {
+ .name = "e3x0-button",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(e3x0_button_match),
+ },
+ .probe = e3x0_button_probe,
+};
+
+static int __init e3x0_button_init(void)
+{
+ pr_info("e3x0-button: Copyright (c) 2014 National Instruments Corp");
+ return platform_driver_register(&e3x0_button_driver);
+}
+
+static void e3x0_button_exit(void)
+{
+ platform_driver_unregister(&e3x0_button_driver);
+}
+
+module_init(e3x0_button_init);
+module_exit(e3x0_button_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Moritz Fischer <moritz.fischer@xxxxxxxxx>");
+MODULE_DESCRIPTION("NI Ettus Research USRP E3x0 Button driver");
+MODULE_ALIAS("platform:e3x0-button");
--
1.9.3
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