/* * linux/drivers/mfd/ucb1x00-assabet.c * * Copyright (C) 2001-2003 Russell King, All Rights Reserved. * * 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. * * We handle the machine-specific bits of the UCB1x00 driver here. */ #include <linux/module.h> #include <linux/init.h> #include <linux/device.h> #include <linux/err.h> #include <linux/fs.h> #include <linux/gpio_keys.h> #include <linux/input.h> #include <linux/platform_device.h> #include <linux/proc_fs.h> #include <linux/mfd/ucb1x00.h> #define UCB1X00_ATTR(name,input)\ static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ char *buf) \ { \ struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ int val; \ ucb1x00_adc_enable(ucb); \ val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ ucb1x00_adc_disable(ucb); \ return sprintf(buf, "%d\n", val); \ } \ static DEVICE_ATTR(name,0444,name##_show,NULL) UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) { struct ucb1x00 *ucb = dev->ucb; struct platform_device *pdev; struct gpio_keys_platform_data keys; static struct gpio_keys_button buttons[6]; unsigned i; memset(buttons, 0, sizeof(buttons)); memset(&keys, 0, sizeof(keys)); for (i = 0; i < ARRAY_SIZE(buttons); i++) { buttons[i].code = BTN_0 + i; buttons[i].gpio = ucb->gpio.base + i; buttons[i].type = EV_KEY; buttons[i].can_disable = true; } keys.buttons = buttons; keys.nbuttons = ARRAY_SIZE(buttons); keys.poll_interval = 50; keys.name = "ucb1x00"; pdev = platform_device_register_data(&ucb->dev, "gpio-keys", -1, &keys, sizeof(keys)); device_create_file(&ucb->dev, &dev_attr_vbatt); device_create_file(&ucb->dev, &dev_attr_vcharger); device_create_file(&ucb->dev, &dev_attr_batt_temp); dev->priv = pdev; return 0; } static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) { struct platform_device *pdev = dev->priv; if (!IS_ERR(pdev)) platform_device_unregister(pdev); device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp); device_remove_file(&dev->ucb->dev, &dev_attr_vcharger); device_remove_file(&dev->ucb->dev, &dev_attr_vbatt); } static struct ucb1x00_driver ucb1x00_assabet_driver = { .add = ucb1x00_assabet_add, .remove = ucb1x00_assabet_remove, }; static int __init ucb1x00_assabet_init(void) { return ucb1x00_register_driver(&ucb1x00_assabet_driver); } static void __exit ucb1x00_assabet_exit(void) { ucb1x00_unregister_driver(&ucb1x00_assabet_driver); } module_init(ucb1x00_assabet_init); module_exit(ucb1x00_assabet_exit); MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); MODULE_LICENSE("GPL");