[ms2-fixes] / debounce.c

#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/gpio_event.h>

#define PREFIX "debounce: "

static unsigned old_flags = 0;
ktime_t old_debounce_delay;
ktime_t old_settle_time;
ktime_t old_poll_time;
static struct gpio_event_matrix_info *gpio_evmi = NULL;

static int find_ms2_dev(struct device *dev, void *data)
{
	if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) {
		printk(KERN_INFO PREFIX "Found it\n");
		return 1;
	}
	return 0;
}

static ssize_t show_debounce_delay(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->debounce_delay.tv.nsec / NSEC_PER_MSEC));
}

static void set_debounce_delay(long delay)
{
	if (gpio_evmi->debounce_delay.tv.nsec != delay * NSEC_PER_MSEC) {
		printk(KERN_INFO PREFIX "Changing debounce_delay\n");
		gpio_evmi->debounce_delay.tv.nsec = delay * NSEC_PER_MSEC;
		printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	}

#if 0
	if (gpio_evmi->debounce_delay.tv.nsec != 0) {
		if (!(gpio_evmi->flags & GPIOKPF_DEBOUNCE)) {
			printk(KERN_INFO PREFIX "Activating debounce\n");
			gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
		}
	} else {
		if (gpio_evmi->flags & GPIOKPF_DEBOUNCE) {
			printk(KERN_INFO PREFIX "Deactivating debounce\n");
			gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
		}
	}
#endif
}

static ssize_t store_debounce_delay(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	long int delay;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%ld", &delay);
	set_debounce_delay(delay);

	return count;
}

static ssize_t show_settle_time(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->settle_time.tv.nsec / NSEC_PER_USEC));
}

static ssize_t store_settle_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	long int delay;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%ld", &delay);
	gpio_evmi->settle_time.tv.nsec = delay * NSEC_PER_USEC;

	return count;
}

static ssize_t show_poll_time(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->poll_time.tv.nsec / NSEC_PER_MSEC));
}

static ssize_t store_poll_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	long int delay;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%ld", &delay);
	gpio_evmi->poll_time.tv.nsec = delay * NSEC_PER_MSEC;

	return count;
}

static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "0x%x\n", gpio_evmi->flags);
}

static ssize_t store_flags(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flags;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "0x%x", &flags);

	printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);

	if (flags & GPIOKPF_DRIVE_INACTIVE)
		return count;

	gpio_evmi->flags = flags;

	return count;
}

static ssize_t show_debounce_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DEBOUNCE) ? 1 : 0);
}

static ssize_t store_debounce_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
	}

	return count;
}

static ssize_t show_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_REMOVE_SOME_PHANTOM_KEYS) ? 1 : 0);
}

static ssize_t store_remove_some_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
	}

	return count;
}

static ssize_t show_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_UNMAPPED_KEYS) ? 1 : 0);
}

static ssize_t store_print_unmapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_PRINT_UNMAPPED_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_PRINT_UNMAPPED_KEYS;
	}

	return count;
}

static ssize_t show_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_MAPPED_KEYS) ? 1 : 0);
}

static ssize_t store_print_mapped_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_PRINT_MAPPED_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_PRINT_MAPPED_KEYS;
	}

	return count;
}

static ssize_t show_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, char *buf)
{
	if (!gpio_evmi) 
		return -ENODEV;

	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_PHANTOM_KEYS) ? 1 : 0);
}

static ssize_t store_print_phantom_keys_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
	unsigned flag;

	if (!gpio_evmi) 
		return -ENODEV;

	sscanf(buf, "%u", &flag);

	if (flag) {
		gpio_evmi->flags |= GPIOKPF_PRINT_PHANTOM_KEYS;
	} else {
		gpio_evmi->flags &= ~GPIOKPF_PRINT_PHANTOM_KEYS;
	}

	return count;
}

static DEVICE_ATTR(debounce_delay, (S_IRUGO | S_IWUGO), show_debounce_delay, store_debounce_delay);
static DEVICE_ATTR(settle_time, (S_IRUGO | S_IWUGO), show_settle_time, store_settle_time);
static DEVICE_ATTR(poll_time, (S_IRUGO | S_IWUGO), show_poll_time, store_poll_time);
static DEVICE_ATTR(flags, (S_IRUGO), show_flags, store_flags);
static DEVICE_ATTR(debounce_flag, (S_IRUGO | S_IWUGO), show_debounce_flag, store_debounce_flag);
static DEVICE_ATTR(remove_some_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_remove_some_phantom_keys_flag, store_remove_some_phantom_keys_flag);
static DEVICE_ATTR(print_unmapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_unmapped_keys_flag, store_print_unmapped_keys_flag);
static DEVICE_ATTR(print_mapped_keys_flag, (S_IRUGO | S_IWUGO), show_print_mapped_keys_flag, store_print_mapped_keys_flag);
static DEVICE_ATTR(print_phantom_keys_flag, (S_IRUGO | S_IWUGO), show_print_phantom_keys_flag, store_print_phantom_keys_flag);

static void debounce_release(struct device *dev)
{
}

static struct device debounce_device = {
	.init_name = "debounce",
	.release = debounce_release,
};

static int __init debounce_init(void)
{
	struct device *event_dev = NULL;
	struct gpio_event_platform_data *gpio_epd;
	struct gpio_event_info *gpio_ei;
	int err = 0;

	printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n");
	
	event_dev = device_find_child(&platform_bus, GPIO_EVENT_DEV_NAME, find_ms2_dev);
	if (event_dev == NULL)
		return -ENODEV;

	gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data;
	printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name);
	if (strcmp(gpio_epd->name, "sholes-keypad"))
		return -ENODEV;

	gpio_ei = (struct gpio_event_info*)gpio_epd->info[0];
	gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info);

	err = device_register(&debounce_device);
	if (err) {
		return err;
	}

	err = device_create_file(&debounce_device, &dev_attr_debounce_delay);
	err = device_create_file(&debounce_device, &dev_attr_settle_time);
	err = device_create_file(&debounce_device, &dev_attr_poll_time);
	err = device_create_file(&debounce_device, &dev_attr_flags);
	err = device_create_file(&debounce_device, &dev_attr_debounce_flag);
	err = device_create_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	err = device_create_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	err = device_create_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	err = device_create_file(&debounce_device, &dev_attr_print_phantom_keys_flag);

	printk(KERN_INFO PREFIX "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec);
	printk(KERN_INFO PREFIX "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec);
	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);

	old_debounce_delay = gpio_evmi->debounce_delay;
	old_settle_time = gpio_evmi->settle_time;
	old_poll_time = gpio_evmi->poll_time;
	old_flags = gpio_evmi->flags;

	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);

	return 0;
}

static void __exit debounce_exit(void)
{
	if (gpio_evmi) {
		if (gpio_evmi->debounce_delay.tv.nsec != old_debounce_delay.tv.nsec) {
			printk(KERN_INFO PREFIX "Restoring debounce_delay\n");
			gpio_evmi->debounce_delay = old_debounce_delay;
			printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
		}
		if (gpio_evmi->flags != old_flags) {
			printk(KERN_INFO PREFIX "Restoring flags\n");
			gpio_evmi->flags = old_flags;
			printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
		}
		gpio_evmi->settle_time = old_settle_time;
		gpio_evmi->poll_time = old_poll_time;
	}
	device_remove_file(&debounce_device, &dev_attr_debounce_delay);
	device_remove_file(&debounce_device, &dev_attr_settle_time);
	device_remove_file(&debounce_device, &dev_attr_poll_time);
	device_remove_file(&debounce_device, &dev_attr_flags);
	device_remove_file(&debounce_device, &dev_attr_debounce_flag);
	device_remove_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	device_remove_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	device_remove_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	device_remove_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
	device_unregister(&debounce_device);
}

module_init(debounce_init);
module_exit(debounce_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>");
Commit	Line	Data
b422e333	1	#include <linux/module.h>
d1ff9643 MG	2	#include <linux/device.h>
	3	#include <linux/platform_device.h>
	4	#include <linux/gpio_event.h>
	5
ab5ed215 MG	6	#define PREFIX "debounce: "
ab5ed215 MG	7
a4838b14	8	static unsigned old_flags = 0;
bb65757a MG	9	ktime_t old_debounce_delay;
	10	ktime_t old_settle_time;
	11	ktime_t old_poll_time;
1e65c113 MG	12	static struct gpio_event_matrix_info *gpio_evmi = NULL;
1e65c113 MG	13
ab5ed215	14	static int find_ms2_dev(struct device dev, void data)
d1ff9643 MG	15	{
d1ff9643 MG	16	if (!strncmp((char)data, dev_name(dev), strlen((char)data))) {
ab5ed215	17	printk(KERN_INFO PREFIX "Found it\n");
d1ff9643 MG	18	return 1;
	19	}
	20	return 0;
	21	}
b422e333	22
f7cb07b2 MG	23	static ssize_t show_debounce_delay(struct device dev, struct device_attribute attr, char *buf)
	24	{
	25	if (!gpio_evmi)
	26	return -ENODEV;
	27
	28	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->debounce_delay.tv.nsec / NSEC_PER_MSEC));
	29	}
	30
	31	static void set_debounce_delay(long delay)
	32	{
	33	if (gpio_evmi->debounce_delay.tv.nsec != delay * NSEC_PER_MSEC) {
	34	printk(KERN_INFO PREFIX "Changing debounce_delay\n");
	35	gpio_evmi->debounce_delay.tv.nsec = delay * NSEC_PER_MSEC;
f7cb07b2 MG	36	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	37	}
	38
fc215caa	39	#if 0
f7cb07b2 MG	40	if (gpio_evmi->debounce_delay.tv.nsec != 0) {
	41	if (!(gpio_evmi->flags & GPIOKPF_DEBOUNCE)) {
	42	printk(KERN_INFO PREFIX "Activating debounce\n");
	43	gpio_evmi->flags \|= GPIOKPF_DEBOUNCE;
	44	}
	45	} else {
	46	if (gpio_evmi->flags & GPIOKPF_DEBOUNCE) {
	47	printk(KERN_INFO PREFIX "Deactivating debounce\n");
	48	gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
	49	}
	50	}
fc215caa	51	#endif
f7cb07b2 MG	52	}
	53
	54	static ssize_t store_debounce_delay(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	55	{
	56	long int delay;
	57
	58	if (!gpio_evmi)
	59	return -ENODEV;
	60
	61	sscanf(buf, "%ld", &delay);
	62	set_debounce_delay(delay);
	63
fc215caa	64	return count;
f7cb07b2 MG	65	}
	66
	67	static ssize_t show_settle_time(struct device dev, struct device_attribute attr, char *buf)
	68	{
	69	if (!gpio_evmi)
	70	return -ENODEV;
	71
	72	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->settle_time.tv.nsec / NSEC_PER_USEC));
	73	}
	74
	75	static ssize_t store_settle_time(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	76	{
	77	long int delay;
	78
	79	if (!gpio_evmi)
	80	return -ENODEV;
	81
	82	sscanf(buf, "%ld", &delay);
	83	gpio_evmi->settle_time.tv.nsec = delay * NSEC_PER_USEC;
	84
fc215caa	85	return count;
f7cb07b2 MG	86	}
	87
	88	static ssize_t show_poll_time(struct device dev, struct device_attribute attr, char *buf)
	89	{
	90	if (!gpio_evmi)
	91	return -ENODEV;
	92
	93	return snprintf(buf, PAGE_SIZE, "%ld\n", (gpio_evmi->poll_time.tv.nsec / NSEC_PER_MSEC));
	94	}
	95
	96	static ssize_t store_poll_time(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	97	{
	98	long int delay;
	99
	100	if (!gpio_evmi)
	101	return -ENODEV;
	102
	103	sscanf(buf, "%ld", &delay);
	104	gpio_evmi->poll_time.tv.nsec = delay * NSEC_PER_MSEC;
	105
fc215caa	106	return count;
f7cb07b2 MG	107	}
	108
	109	static ssize_t show_flags(struct device dev, struct device_attribute attr, char *buf)
	110	{
	111	if (!gpio_evmi)
	112	return -ENODEV;
	113
	114	return snprintf(buf, PAGE_SIZE, "0x%x\n", gpio_evmi->flags);
	115	}
	116
	117	static ssize_t store_flags(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	118	{
	119	unsigned flags;
	120
	121	if (!gpio_evmi)
	122	return -ENODEV;
	123
	124	sscanf(buf, "0x%x", &flags);
fc215caa MG	125
	126	printk(KERN_INFO PREFIX "flags: 0x%x\n", flags);
	127
	128	if (flags & GPIOKPF_DRIVE_INACTIVE)
	129	return count;
	130
f7cb07b2 MG	131	gpio_evmi->flags = flags;
f7cb07b2 MG	132
fc215caa MG	133	return count;
	134	}
	135
	136	static ssize_t show_debounce_flag(struct device dev, struct device_attribute attr, char *buf)
	137	{
	138	if (!gpio_evmi)
	139	return -ENODEV;
	140
	141	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_DEBOUNCE) ? 1 : 0);
f7cb07b2 MG	142	}
f7cb07b2 MG	143
fc215caa MG	144	static ssize_t store_debounce_flag(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	145	{
	146	unsigned flag;
	147
	148	if (!gpio_evmi)
	149	return -ENODEV;
	150
	151	sscanf(buf, "%u", &flag);
	152
	153	if (flag) {
	154	gpio_evmi->flags \|= GPIOKPF_DEBOUNCE;
	155	} else {
	156	gpio_evmi->flags &= ~GPIOKPF_DEBOUNCE;
	157	}
	158
	159	return count;
	160	}
	161
	162	static ssize_t show_remove_some_phantom_keys_flag(struct device dev, struct device_attribute attr, char *buf)
	163	{
	164	if (!gpio_evmi)
	165	return -ENODEV;
	166
	167	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_REMOVE_SOME_PHANTOM_KEYS) ? 1 : 0);
	168	}
	169
	170	static ssize_t store_remove_some_phantom_keys_flag(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	171	{
	172	unsigned flag;
	173
	174	if (!gpio_evmi)
	175	return -ENODEV;
	176
	177	sscanf(buf, "%u", &flag);
	178
	179	if (flag) {
	180	gpio_evmi->flags \|= GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
	181	} else {
	182	gpio_evmi->flags &= ~GPIOKPF_REMOVE_SOME_PHANTOM_KEYS;
	183	}
	184
	185	return count;
	186	}
	187
	188	static ssize_t show_print_unmapped_keys_flag(struct device dev, struct device_attribute attr, char *buf)
	189	{
	190	if (!gpio_evmi)
	191	return -ENODEV;
	192
	193	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_UNMAPPED_KEYS) ? 1 : 0);
	194	}
	195
	196	static ssize_t store_print_unmapped_keys_flag(struct device dev, struct device_attribute attr, const char *buf, size_t count)
	197	{
	198	unsigned flag;
	199
	200	if (!gpio_evmi)
	201	return -ENODEV;
	202
	203	sscanf(buf, "%u", &flag);
	204
	205	if (flag) {
	206	gpio_evmi->flags \|= GPIOKPF_PRINT_UNMAPPED_KEYS;
	207	} else {
208	gpio_evmi->flags &= ~GPIOKPF_PRINT_UNMAPPED_KEYS;
209	}
210
211	return count;
212	}
213
214	static ssize_t show_print_mapped_keys_flag(struct device dev, struct device_attribute attr, char *buf)
215	{
216	if (!gpio_evmi)
217	return -ENODEV;
218
219	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_MAPPED_KEYS) ? 1 : 0);
220	}
221
222	static ssize_t store_print_mapped_keys_flag(struct device dev, struct device_attribute attr, const char *buf, size_t count)
223	{
224	unsigned flag;
225
226	if (!gpio_evmi)
227	return -ENODEV;
228
229	sscanf(buf, "%u", &flag);
230
231	if (flag) {
232	gpio_evmi->flags \|= GPIOKPF_PRINT_MAPPED_KEYS;
233	} else {
234	gpio_evmi->flags &= ~GPIOKPF_PRINT_MAPPED_KEYS;
235	}
236
237	return count;
238	}
239
240	static ssize_t show_print_phantom_keys_flag(struct device dev, struct device_attribute attr, char *buf)
241	{
242	if (!gpio_evmi)
243	return -ENODEV;
244
245	return snprintf(buf, PAGE_SIZE, "%u\n", (gpio_evmi->flags & GPIOKPF_PRINT_PHANTOM_KEYS) ? 1 : 0);
246	}
247
248	static ssize_t store_print_phantom_keys_flag(struct device dev, struct device_attribute attr, const char *buf, size_t count)
249	{
250	unsigned flag;
251
252	if (!gpio_evmi)
253	return -ENODEV;
254
255	sscanf(buf, "%u", &flag);
256
257	if (flag) {
258	gpio_evmi->flags \|= GPIOKPF_PRINT_PHANTOM_KEYS;
259	} else {
260	gpio_evmi->flags &= ~GPIOKPF_PRINT_PHANTOM_KEYS;
261	}
262
263	return count;
264	}
265
266	static DEVICE_ATTR(debounce_delay, (S_IRUGO \| S_IWUGO), show_debounce_delay, store_debounce_delay);
267	static DEVICE_ATTR(settle_time, (S_IRUGO \| S_IWUGO), show_settle_time, store_settle_time);
268	static DEVICE_ATTR(poll_time, (S_IRUGO \| S_IWUGO), show_poll_time, store_poll_time);
269	static DEVICE_ATTR(flags, (S_IRUGO), show_flags, store_flags);
270	static DEVICE_ATTR(debounce_flag, (S_IRUGO \| S_IWUGO), show_debounce_flag, store_debounce_flag);
271	static DEVICE_ATTR(remove_some_phantom_keys_flag, (S_IRUGO \| S_IWUGO), show_remove_some_phantom_keys_flag, store_remove_some_phantom_keys_flag);
272	static DEVICE_ATTR(print_unmapped_keys_flag, (S_IRUGO \| S_IWUGO), show_print_unmapped_keys_flag, store_print_unmapped_keys_flag);
273	static DEVICE_ATTR(print_mapped_keys_flag, (S_IRUGO \| S_IWUGO), show_print_mapped_keys_flag, store_print_mapped_keys_flag);
274	static DEVICE_ATTR(print_phantom_keys_flag, (S_IRUGO \| S_IWUGO), show_print_phantom_keys_flag, store_print_phantom_keys_flag);
f7cb07b2 MG	275
	276	static void debounce_release(struct device *dev)
	277	{
	278	}
	279
	280	static struct device debounce_device = {
	281	.init_name = "debounce",
	282	.release = debounce_release,
	283	};
	284
b422e333 MG	285	static int __init debounce_init(void)
b422e333 MG	286	{
d1ff9643 MG	287	struct device *event_dev = NULL;
	288	struct gpio_event_platform_data *gpio_epd;
	289	struct gpio_event_info *gpio_ei;
f7cb07b2	290	int err = 0;
d1ff9643	291
ab5ed215	292	printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n");
d1ff9643 MG	293
	294	event_dev = device_find_child(&platform_bus, GPIO_EVENT_DEV_NAME, find_ms2_dev);
	295	if (event_dev == NULL)
	296	return -ENODEV;
	297
	298	gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data;
ab5ed215	299	printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name);
d1ff9643 MG	300	if (strcmp(gpio_epd->name, "sholes-keypad"))
	301	return -ENODEV;
	302
	303	gpio_ei = (struct gpio_event_info*)gpio_epd->info[0];
	304	gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info);
	305
f7cb07b2 MG	306	err = device_register(&debounce_device);
	307	if (err) {
	308	return err;
	309	}
	310
	311	err = device_create_file(&debounce_device, &dev_attr_debounce_delay);
	312	err = device_create_file(&debounce_device, &dev_attr_settle_time);
	313	err = device_create_file(&debounce_device, &dev_attr_poll_time);
	314	err = device_create_file(&debounce_device, &dev_attr_flags);
fc215caa MG	315	err = device_create_file(&debounce_device, &dev_attr_debounce_flag);
	316	err = device_create_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	317	err = device_create_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	318	err = device_create_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	319	err = device_create_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
f7cb07b2	320
ab5ed215 MG	321	printk(KERN_INFO PREFIX "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec);
	322	printk(KERN_INFO PREFIX "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec);
	323	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
	324	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
20bf1c9e	325
bb65757a MG	326	old_debounce_delay = gpio_evmi->debounce_delay;
	327	old_settle_time = gpio_evmi->settle_time;
	328	old_poll_time = gpio_evmi->poll_time;
	329	old_flags = gpio_evmi->flags;
1e65c113	330
a4838b14 MG	331	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
a4838b14 MG	332
b422e333 MG	333	return 0;
	334	}
	335
	336	static void __exit debounce_exit(void)
	337	{
1e65c113	338	if (gpio_evmi) {
bb65757a	339	if (gpio_evmi->debounce_delay.tv.nsec != old_debounce_delay.tv.nsec) {
1e65c113	340	printk(KERN_INFO PREFIX "Restoring debounce_delay\n");
bb65757a	341	gpio_evmi->debounce_delay = old_debounce_delay;
1e65c113 MG	342	printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
1e65c113 MG	343	}
a4838b14 MG	344	if (gpio_evmi->flags != old_flags) {
	345	printk(KERN_INFO PREFIX "Restoring flags\n");
	346	gpio_evmi->flags = old_flags;
	347	printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
	348	}
bb65757a MG	349	gpio_evmi->settle_time = old_settle_time;
bb65757a MG	350	gpio_evmi->poll_time = old_poll_time;
1e65c113	351	}
f7cb07b2 MG	352	device_remove_file(&debounce_device, &dev_attr_debounce_delay);
	353	device_remove_file(&debounce_device, &dev_attr_settle_time);
	354	device_remove_file(&debounce_device, &dev_attr_poll_time);
	355	device_remove_file(&debounce_device, &dev_attr_flags);
fc215caa MG	356	device_remove_file(&debounce_device, &dev_attr_debounce_flag);
	357	device_remove_file(&debounce_device, &dev_attr_remove_some_phantom_keys_flag);
	358	device_remove_file(&debounce_device, &dev_attr_print_unmapped_keys_flag);
	359	device_remove_file(&debounce_device, &dev_attr_print_mapped_keys_flag);
	360	device_remove_file(&debounce_device, &dev_attr_print_phantom_keys_flag);
f7cb07b2	361	device_unregister(&debounce_device);
b422e333 MG	362	}
	363
	364	module_init(debounce_init);
	365	module_exit(debounce_exit);
	366
	367	MODULE_LICENSE("GPL");
	368	MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>");