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add a polled GPIO buttons input driver
SVN-Revision: 10766
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5798590c7c
@ -497,6 +497,40 @@ endef
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$(eval $(call KernelPackage,input-evdev))
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define KernelPackage/input-polldev
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SUBMENU:=$(OTHER_MENU)
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TITLE:=Polled Input device support
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DEPENDS:=+kmod-input-core @LINUX_2_6
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KCONFIG:=CONFIG_INPUT_POLLDEV
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FILES:=$(LINUX_DIR)/drivers/input/input-polldev.$(LINUX_KMOD_SUFFIX)
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AUTOLOAD:=$(call AutoLoad,61,input-polldev)
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endef
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define KernelPackage/input-polldev/description
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Kernel module for support of polled input devices
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endef
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$(eval $(call KernelPackage,input-polldev))
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define KernelPackage/input-gpio-buttons
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SUBMENU:=$(OTHER_MENU)
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TITLE:=Polled GPIO buttons input device
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DEPENDS:=+kmod-input-polldev @LINUX_2_6
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KCONFIG:= \
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CONFIG_INPUT_GPIO_BUTTONS \
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CONFIG_INPUT_MISC=y
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FILES:=$(LINUX_DIR)/drivers/input/misc/gpio_buttons.$(LINUX_KMOD_SUFFIX)
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AUTOLOAD:=$(call AutoLoad,62,gpio_buttons)
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endef
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define KernelPackage/input-gpio-buttons/description
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Kernel module for support polled GPIO buttons input device
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endef
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$(eval $(call KernelPackage,input-gpio-buttons))
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define KernelPackage/mmc-spi
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SUBMENU:=$(OTHER_MENU)
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TITLE:=MMC/SD over SPI Support
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206
target/linux/generic-2.6/files/drivers/input/misc/gpio_buttons.c
Normal file
206
target/linux/generic-2.6/files/drivers/input/misc/gpio_buttons.c
Normal file
@ -0,0 +1,206 @@
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/*
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* Driver for buttons on GPIO lines not capable of generating interrupts
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*
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* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
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*
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* This file was based on: /drivers/input/misc/cobalt_btns.c
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* Copyright (C) 2007 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
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*
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* also was based on: /drivers/input/keyboard/gpio_keys.c
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* Copyright 2005 Phil Blundell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/init.h>
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#include <linux/input-polldev.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/gpio_buttons.h>
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#include <asm/gpio.h>
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#define DRV_NAME "gpio-buttons"
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#define DRV_VERSION "0.1.0"
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#define PFX DRV_NAME ": "
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struct gpio_buttons_dev {
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struct input_polled_dev *poll_dev;
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struct gpio_buttons_platform_data *pdata;
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};
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static void gpio_buttons_poll(struct input_polled_dev *dev)
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{
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struct gpio_buttons_dev *bdev = dev->private;
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struct gpio_buttons_platform_data *pdata = bdev->pdata;
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struct input_dev *input = dev->input;
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int i;
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for (i = 0; i < bdev->pdata->nbuttons; i++) {
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struct gpio_button *button = &pdata->buttons[i];
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unsigned int type = button->type ?: EV_KEY;
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int state;
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state = gpio_get_value(button->gpio) ? 1 : 0;
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state ^= button->active_low;
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if (state) {
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button->count++;
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} else {
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if (button->count >= button->threshold) {
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input_event(input, type, button->code, 1);
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input_sync(input);
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}
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button->count = 0;
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}
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if (button->count == button->threshold) {
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input_event(input, type, button->code, 0);
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input_sync(input);
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}
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}
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}
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static int __devinit gpio_buttons_probe(struct platform_device *pdev)
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{
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struct gpio_buttons_platform_data *pdata = pdev->dev.platform_data;
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struct gpio_buttons_dev *bdev;
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struct input_polled_dev *poll_dev;
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struct input_dev *input;
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int error, i;
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if (!pdata)
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return -ENXIO;
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bdev = kzalloc(sizeof(*bdev), GFP_KERNEL);
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if (!bdev) {
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pr_err(DRV_NAME "no memory for device\n");
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return -ENOMEM;
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}
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poll_dev = input_allocate_polled_device();
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if (!poll_dev) {
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pr_err(DRV_NAME "no memory for polled device\n");
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error = -ENOMEM;
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goto err_free_bdev;
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}
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poll_dev->private = bdev;
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poll_dev->poll = gpio_buttons_poll;
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poll_dev->poll_interval = pdata->poll_interval;
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input = poll_dev->input;
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input->evbit[0] = BIT_MASK(EV_KEY);
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input->name = pdev->name;
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input->phys = "gpio-buttons/input0";
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input->dev.parent = &pdev->dev;
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input->id.bustype = BUS_HOST;
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input->id.vendor = 0x0001;
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input->id.product = 0x0001;
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input->id.version = 0x0100;
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for (i = 0; i < pdata->nbuttons; i++) {
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struct gpio_button *button = &pdata->buttons[i];
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unsigned int gpio = button->gpio;
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unsigned int type = button->type ?: EV_KEY;
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error = gpio_request(gpio, button->desc ?
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button->desc : DRV_NAME);
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if (error) {
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pr_err(PFX "unable to claim gpio %u, error %d\n",
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gpio, error);
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goto err_free_gpio;
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}
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error = gpio_direction_input(gpio);
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if (error) {
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pr_err(PFX "unable to set direction on gpio %u, "
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"error %d\n", gpio, error);
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goto err_free_gpio;
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}
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input_set_capability(input, type, button->code);
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button->count = 0;
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}
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bdev->poll_dev = poll_dev;
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bdev->pdata = pdata;
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platform_set_drvdata(pdev, bdev);
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error = input_register_polled_device(poll_dev);
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if (error) {
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pr_err(PFX "unable to register polled device, error %d\n",
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error);
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goto err_free_gpio;
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}
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return 0;
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err_free_gpio:
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for (i = i - 1; i >= 0; i--)
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gpio_free(pdata->buttons[i].gpio);
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input_free_polled_device(poll_dev);
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err_free_bdev:
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kfree(bdev);
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err:
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platform_set_drvdata(pdev, NULL);
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return error;
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}
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static int __devexit gpio_buttons_remove(struct platform_device *pdev)
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{
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struct gpio_buttons_dev *bdev = platform_get_drvdata(pdev);
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struct gpio_buttons_platform_data *pdata = bdev->pdata;
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int i;
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input_unregister_polled_device(bdev->poll_dev);
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for (i = 0; i < pdata->nbuttons; i++)
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gpio_free(pdata->buttons[i].gpio);
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input_free_polled_device(bdev->poll_dev);
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kfree(bdev);
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platform_set_drvdata(pdev, NULL);
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return 0;
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}
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static struct platform_driver gpio_buttons_driver = {
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.probe = gpio_buttons_probe,
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.remove = __devexit_p(gpio_buttons_remove),
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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};
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static int __init gpio_buttons_init(void)
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{
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pr_info(DRV_NAME " driver version " DRV_VERSION "\n");
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return platform_driver_register(&gpio_buttons_driver);
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}
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static void __exit gpio_buttons_exit(void)
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{
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platform_driver_unregister(&gpio_buttons_driver);
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}
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module_init(gpio_buttons_init);
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module_exit(gpio_buttons_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
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MODULE_VERSION(DRV_VERSION);
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MODULE_DESCRIPTION("Polled buttons driver for CPU GPIOs");
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35
target/linux/generic-2.6/files/include/linux/gpio_buttons.h
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35
target/linux/generic-2.6/files/include/linux/gpio_buttons.h
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@ -0,0 +1,35 @@
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/*
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* Definitions for the GPIO buttons interface driver
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*
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* Copyright (C) 2007,2008 Gabor Juhos <juhosg at openwrt.org>
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*
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* This file was based on: /include/linux/gpio_keys.h
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* The original gpio_keys.h seems not to have a license.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef _GPIO_BUTTONS_H_
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#define _GPIO_BUTTONS_H_
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struct gpio_button {
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int gpio; /* GPIO line number */
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int active_low;
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char *desc; /* button description */
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int type; /* input event type (EV_KEY, EV_SW) */
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int code; /* input event code (KEY_*, SW_*) */
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int count;
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int threshold; /* count threshold */
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};
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struct gpio_buttons_platform_data {
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struct gpio_button *buttons;
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int nbuttons; /* number of buttons */
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int poll_interval; /* polling interval */
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};
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#endif /* _GPIO_BUTTONS_H_ */
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@ -0,0 +1,30 @@
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--- linux-2.6.22.orig/drivers/input/misc/Kconfig 2007-08-21 06:33:06.000000000 +0200
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+++ linux-2.6.22/drivers/input/misc/Kconfig 2007-10-08 10:57:23.000000000 +0200
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@@ -178,4 +178,20 @@
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Say Y here if you want to support the built-in real time clock
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of the HP SDC controller.
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+config INPUT_GPIO_BUTTONS
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+ tristate "Polled GPIO buttons interface"
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+ depends on GENERIC_GPIO
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+ select INPUT_POLLDEV
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+ help
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+ This driver implements support for buttons connected
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+ to GPIO pins of various CPUs (and some other chips).
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+
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+ Say Y here if your device has buttons connected
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+ directly to such GPIO pins. Your board-specific
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+ setup logic must also provide a platform device,
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+ with configuration data saying which GPIOs are used.
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called gpio-buttons.
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+
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endif
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--- linux-2.6.22.4.orig/drivers/input/misc/Makefile 2007-08-21 06:33:06.000000000 +0200
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+++ linux-2.6.22.4/drivers/input/misc/Makefile 2007-10-08 10:50:12.000000000 +0200
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@@ -18,3 +18,4 @@
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obj-$(CONFIG_INPUT_YEALINK) += yealink.o
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obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
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obj-$(CONFIG_INPUT_UINPUT) += uinput.o
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+obj-$(CONFIG_INPUT_GPIO_BUTTONS) += gpio_buttons.o
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@ -0,0 +1,30 @@
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--- linux-2.6.23.orig/drivers/input/misc/Kconfig 2007-08-21 06:33:06.000000000 +0200
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+++ linux-2.6.23/drivers/input/misc/Kconfig 2007-10-08 10:57:23.000000000 +0200
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@@ -178,4 +178,20 @@
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Say Y here if you want to support the built-in real time clock
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of the HP SDC controller.
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+config INPUT_GPIO_BUTTONS
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+ tristate "Polled GPIO buttons interface"
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+ depends on GENERIC_GPIO
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+ select INPUT_POLLDEV
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+ help
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+ This driver implements support for buttons connected
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+ to GPIO pins of various CPUs (and some other chips).
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+
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+ Say Y here if your device has buttons connected
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+ directly to such GPIO pins. Your board-specific
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+ setup logic must also provide a platform device,
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+ with configuration data saying which GPIOs are used.
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called gpio-buttons.
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+
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endif
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--- linux-2.6.23.orig/drivers/input/misc/Makefile 2007-08-21 06:33:06.000000000 +0200
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+++ linux-2.6.23/drivers/input/misc/Makefile 2007-10-08 10:50:12.000000000 +0200
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@@ -18,3 +18,4 @@
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obj-$(CONFIG_INPUT_YEALINK) += yealink.o
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obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
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obj-$(CONFIG_INPUT_UINPUT) += uinput.o
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+obj-$(CONFIG_INPUT_GPIO_BUTTONS) += gpio_buttons.o
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@ -0,0 +1,30 @@
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--- linux-2.6.24.2.orig/drivers/input/misc/Kconfig 2007-08-21 06:33:06.000000000 +0200
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+++ linux-2.6.24.2/drivers/input/misc/Kconfig 2007-10-08 10:57:23.000000000 +0200
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@@ -178,4 +178,20 @@
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Say Y here if you want to support the built-in real time clock
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of the HP SDC controller.
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+config INPUT_GPIO_BUTTONS
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+ tristate "Polled GPIO buttons interface"
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+ depends on GENERIC_GPIO
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+ select INPUT_POLLDEV
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+ help
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+ This driver implements support for buttons connected
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+ to GPIO pins of various CPUs (and some other chips).
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+
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+ Say Y here if your device has buttons connected
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+ directly to such GPIO pins. Your board-specific
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+ setup logic must also provide a platform device,
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+ with configuration data saying which GPIOs are used.
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+
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+ To compile this driver as a module, choose M here: the
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+ module will be called gpio-buttons.
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+
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endif
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--- linux-2.6.24.2.orig/drivers/input/misc/Makefile 2007-08-21 06:33:06.000000000 +0200
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+++ linux-2.6.24.2/drivers/input/misc/Makefile 2007-10-08 10:50:12.000000000 +0200
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@@ -18,3 +18,4 @@
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obj-$(CONFIG_INPUT_YEALINK) += yealink.o
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obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
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obj-$(CONFIG_INPUT_UINPUT) += uinput.o
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+obj-$(CONFIG_INPUT_GPIO_BUTTONS) += gpio_buttons.o
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