1/* 2 * linux/drivers/mfd/ucb1x00-assabet.c 3 * 4 * Copyright (C) 2001-2003 Russell King, All Rights Reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License. 9 * 10 * We handle the machine-specific bits of the UCB1x00 driver here. 11 */ 12#include <linux/module.h> 13#include <linux/init.h> 14#include <linux/fs.h> 15#include <linux/proc_fs.h> 16#include <linux/device.h> 17#include <linux/mfd/ucb1x00.h> 18 19#include <mach/dma.h> 20 21 22#define UCB1X00_ATTR(name,input)\ 23static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ 24 char *buf) \ 25{ \ 26 struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ 27 int val; \ 28 ucb1x00_adc_enable(ucb); \ 29 val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ 30 ucb1x00_adc_disable(ucb); \ 31 return sprintf(buf, "%d\n", val); \ 32} \ 33static DEVICE_ATTR(name,0444,name##_show,NULL) 34 35UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); 36UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); 37UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); 38 39static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) 40{ 41 device_create_file(&dev->ucb->dev, &dev_attr_vbatt); 42 device_create_file(&dev->ucb->dev, &dev_attr_vcharger); 43 device_create_file(&dev->ucb->dev, &dev_attr_batt_temp); 44 return 0; 45} 46 47static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) 48{ 49 device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp); 50 device_remove_file(&dev->ucb->dev, &dev_attr_vcharger); 51 device_remove_file(&dev->ucb->dev, &dev_attr_vbatt); 52} 53 54static struct ucb1x00_driver ucb1x00_assabet_driver = { 55 .add = ucb1x00_assabet_add, 56 .remove = ucb1x00_assabet_remove, 57}; 58 59static int __init ucb1x00_assabet_init(void) 60{ 61 return ucb1x00_register_driver(&ucb1x00_assabet_driver); 62} 63 64static void __exit ucb1x00_assabet_exit(void) 65{ 66 ucb1x00_unregister_driver(&ucb1x00_assabet_driver); 67} 68 69module_init(ucb1x00_assabet_init); 70module_exit(ucb1x00_assabet_exit); 71 72MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); 73MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); 74MODULE_LICENSE("GPL"); 75