From 846a7fc8f4bc8f0d04be8d953ecba28152b14de4 Mon Sep 17 00:00:00 2001 From: Moritz Fischer Date: Sat, 10 Jan 2015 14:04:14 -0800 Subject: [PATCH] Input: add support for NI Ettus Research USRP E3x0 button Signed-off-by: Moritz Fischer Signed-off-by: Dmitry Torokhov --- .../devicetree/bindings/input/e3x0-button.txt | 25 ++++ .../devicetree/bindings/vendor-prefixes.txt | 1 + drivers/input/misc/Kconfig | 10 ++ drivers/input/misc/Makefile | 1 + drivers/input/misc/e3x0-button.c | 157 +++++++++++++++++++++ 5 files changed, 194 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/e3x0-button.txt create mode 100644 drivers/input/misc/e3x0-button.c diff --git a/Documentation/devicetree/bindings/input/e3x0-button.txt b/Documentation/devicetree/bindings/input/e3x0-button.txt new file mode 100644 index 0000000..751665e --- /dev/null +++ b/Documentation/devicetree/bindings/input/e3x0-button.txt @@ -0,0 +1,25 @@ +National Instruments Ettus Research USRP E3x0 button driver + +This module is part of the NI Ettus Research USRP E3x0 SDR. + +This module provides a simple power button event via two interrupts. + +Required properties: +- compatible: should be one of the following + - "ettus,e3x0-button": For devices such as the NI Ettus Research USRP E3x0 +- interrupt-parent: + - a phandle to the interrupt controller that it is attached to. +- interrupts: should be one of the following + - <0 30 1>, <0 31 1>: For devices such as the NI Ettus Research USRP E3x0 +- interrupt-names: should be one of the following + - "press", "release": For devices such as the NI Ettus Research USRP E3x0 + +Note: Interrupt numbers might vary depending on the FPGA configuration. + +Example: + button { + compatible = "ettus,e3x0-button"; + interrupt-parent = <&intc>; + interrupts = <0 30 1>, <0 31 1>; + interrupt-names = "press", "release"; + } diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt index e6469ec..9f18b4f 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.txt +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt @@ -48,6 +48,7 @@ epcos EPCOS AG epfl Ecole Polytechnique Fédérale de Lausanne epson Seiko Epson Corp. est ESTeem Wireless Modems +ettus NI Ettus Research eukrea Eukréa Electromatique excito Excito fsl Freescale Semiconductor diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 9e610c4..6deb8da 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 f8d9ea7..403a1a5 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..13bfca8 --- /dev/null +++ b/drivers/input/misc/e3x0-button.c @@ -0,0 +1,157 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include +#include + +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) { + 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) { + 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), + .pm = &e3x0_button_pm_ops, + }, + .probe = e3x0_button_probe, + .remove = e3x0_button_remove, +}; + +module_platform_driver(e3x0_button_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Moritz Fischer "); +MODULE_DESCRIPTION("NI Ettus Research USRP E3x0 Button driver"); +MODULE_ALIAS("platform:e3x0-button"); -- 2.7.4