ucb1x00-assabet.c
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/*
* 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");