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 18 #include <asm/dma.h> 19 20 #include "ucb1x00.h" 21 22 #define UCB1X00_ATTR(name,input)\ 23 static ssize_t name##_show(struct class_device *dev, char *buf) \ 24 { \ 25 struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ 26 int val; \ 27 ucb1x00_adc_enable(ucb); \ 28 val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ 29 ucb1x00_adc_disable(ucb); \ 30 return sprintf(buf, "%d\n", val); \ 31 } \ 32 static CLASS_DEVICE_ATTR(name,0444,name##_show,NULL) 33 34 UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); 35 UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); 36 UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); 37 38 static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) 39 { 40 class_device_create_file(&dev->ucb->cdev, &class_device_attr_vbatt); 41 class_device_create_file(&dev->ucb->cdev, &class_device_attr_vcharger); 42 class_device_create_file(&dev->ucb->cdev, &class_device_attr_batt_temp); 43 return 0; 44 } 45 46 static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) 47 { 48 class_device_remove_file(&dev->ucb->cdev, &class_device_attr_batt_temp); 49 class_device_remove_file(&dev->ucb->cdev, &class_device_attr_vcharger); 50 class_device_remove_file(&dev->ucb->cdev, &class_device_attr_vbatt); 51 } 52 53 static struct ucb1x00_driver ucb1x00_assabet_driver = { 54 .add = ucb1x00_assabet_add, 55 .remove = ucb1x00_assabet_remove, 56 }; 57 58 static int __init ucb1x00_assabet_init(void) 59 { 60 return ucb1x00_register_driver(&ucb1x00_assabet_driver); 61 } 62 63 static void __exit ucb1x00_assabet_exit(void) 64 { 65 ucb1x00_unregister_driver(&ucb1x00_assabet_driver); 66 } 67 68 module_init(ucb1x00_assabet_init); 69 module_exit(ucb1x00_assabet_exit); 70 71 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); 72 MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); 73 MODULE_LICENSE("GPL"); 74