Signed-off-by: Moritz Fischer <moritz.fisc...@ettus.com>
---
drivers/input/misc/Kconfig | 10 +++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/e3x0-button.c | 156 +++++++++++++++++++++++++++++++++++++++
3 files changed, 167 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..bff65ef
--- /dev/null
+++ b/drivers/input/misc/e3x0-button.c
@@ -0,0 +1,156 @@
+/*
+ * 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>
+
+static irqreturn_t e3x0_button_release_handler(int irq, void *data)
+{
+ struct input_dev *idev = data;
+
+ input_report_key(idev, KEY_POWER, 0);
+ input_sync(idev);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t e3x0_button_press_handler(int irq, void *data)
+{
+ struct input_dev *idev = data;
+
+ input_report_key(idev, KEY_POWER, 1);
+ pm_wakeup_event(idev->dev.parent, 0);
+ input_sync(idev);
+
+ return IRQ_HANDLED;
+}
+
+static int __maybe_unused e3x0_button_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(platform_get_irq_byname(pdev, "press"));
+
+ return 0;
+}
+
+static int __maybe_unused e3x0_button_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(platform_get_irq_byname(pdev, "press"));
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(e3x0_button_pm_ops,
+ e3x0_button_suspend, e3x0_button_resume);
+
+static int e3x0_button_probe(struct platform_device *pdev)
+{
+ 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;
+ }
+
+ input = devm_input_allocate_device(&pdev->dev);
+ if (!input)
+ return -ENOMEM;
+
+ 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, irq_press,
+ e3x0_button_press_handler, 0,
+ "e3x0-button", input);
+ if (error < 0) {
+ dev_err(&pdev->dev, "Failed to request 'press' IRQ#%d: %d\n",
+ irq_press, error);
+ return error;
+ }
+
+ error = devm_request_irq(&pdev->dev, irq_release,
+ e3x0_button_release_handler, 0,
+ "e3x0-button", input);
+ if (error < 0) {
+ dev_err(&pdev->dev, "Failed to request 'release' IRQ#%d: %d\n",
+ irq_release, error);
+ return error;
+ }
+
+ error = input_register_device(input);
+ if (error) {
+ dev_err(&pdev->dev, "Can't register input device: %d\n", error);
+ return error;
+ }
+
+ platform_set_drvdata(pdev, input);
+ device_init_wakeup(&pdev->dev, 1);
+ return 0;
+}
+
+static int e3x0_button_remove(struct platform_device *pdev)
+{
+ device_init_wakeup(&pdev->dev, 0);
+ 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",
+ .of_match_table = of_match_ptr(e3x0_button_match),
+ },
+ .probe = e3x0_button_probe,
+ .remove = e3x0_button_remove,
+};
+
+module_platform_driver(e3x0_button_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Moritz Fischer <moritz.fisc...@ettus.com>");
+MODULE_DESCRIPTION("NI Ettus Research USRP E3x0 Button driver");
+MODULE_ALIAS("platform:e3x0-button");
--
1.9.3
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