cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ucb1x00-assabet.c (2775B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *  linux/drivers/mfd/ucb1x00-assabet.c
      4 *
      5 *  Copyright (C) 2001-2003 Russell King, All Rights Reserved.
      6 *
      7 *  We handle the machine-specific bits of the UCB1x00 driver here.
      8 */
      9#include <linux/module.h>
     10#include <linux/init.h>
     11#include <linux/device.h>
     12#include <linux/err.h>
     13#include <linux/fs.h>
     14#include <linux/gpio_keys.h>
     15#include <linux/input.h>
     16#include <linux/platform_device.h>
     17#include <linux/proc_fs.h>
     18#include <linux/mfd/ucb1x00.h>
     19
     20#define UCB1X00_ATTR(name,input)\
     21static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \
     22			   char *buf)	\
     23{								\
     24	struct ucb1x00 *ucb = classdev_to_ucb1x00(dev);		\
     25	int val;						\
     26	ucb1x00_adc_enable(ucb);				\
     27	val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC);		\
     28	ucb1x00_adc_disable(ucb);				\
     29	return sprintf(buf, "%d\n", val);			\
     30}								\
     31static DEVICE_ATTR_RO(name)
     32
     33UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1);
     34UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0);
     35UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2);
     36
     37static int ucb1x00_assabet_add(struct ucb1x00_dev *dev)
     38{
     39	struct ucb1x00 *ucb = dev->ucb;
     40	struct platform_device *pdev;
     41	struct gpio_keys_platform_data keys;
     42	static struct gpio_keys_button buttons[6];
     43	unsigned i;
     44
     45	memset(buttons, 0, sizeof(buttons));
     46	memset(&keys, 0, sizeof(keys));
     47
     48	for (i = 0; i < ARRAY_SIZE(buttons); i++) {
     49		buttons[i].code = BTN_0 + i;
     50		buttons[i].gpio = ucb->gpio.base + i;
     51		buttons[i].type = EV_KEY;
     52		buttons[i].can_disable = true;
     53	}
     54
     55	keys.buttons = buttons;
     56	keys.nbuttons = ARRAY_SIZE(buttons);
     57	keys.poll_interval = 50;
     58	keys.name = "ucb1x00";
     59
     60	pdev = platform_device_register_data(&ucb->dev, "gpio-keys", -1,
     61		&keys, sizeof(keys));
     62
     63	device_create_file(&ucb->dev, &dev_attr_vbatt);
     64	device_create_file(&ucb->dev, &dev_attr_vcharger);
     65	device_create_file(&ucb->dev, &dev_attr_batt_temp);
     66
     67	dev->priv = pdev;
     68	return 0;
     69}
     70
     71static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev)
     72{
     73	struct platform_device *pdev = dev->priv;
     74
     75	if (!IS_ERR(pdev))
     76		platform_device_unregister(pdev);
     77
     78	device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp);
     79	device_remove_file(&dev->ucb->dev, &dev_attr_vcharger);
     80	device_remove_file(&dev->ucb->dev, &dev_attr_vbatt);
     81}
     82
     83static struct ucb1x00_driver ucb1x00_assabet_driver = {
     84	.add	= ucb1x00_assabet_add,
     85	.remove	= ucb1x00_assabet_remove,
     86};
     87
     88static int __init ucb1x00_assabet_init(void)
     89{
     90	return ucb1x00_register_driver(&ucb1x00_assabet_driver);
     91}
     92
     93static void __exit ucb1x00_assabet_exit(void)
     94{
     95	ucb1x00_unregister_driver(&ucb1x00_assabet_driver);
     96}
     97
     98module_init(ucb1x00_assabet_init);
     99module_exit(ucb1x00_assabet_exit);
    100
    101MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
    102MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver");
    103MODULE_LICENSE("GPL");