projects / ms2-fixes / blame
| 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: " |
| 7 | ||
| 9f52af43 | 8 | static int delay = 10; |
| ab5ed215 MG |
9 | |
| 10 | module_param(delay, int, S_IRUSR | S_IRGRP | S_IROTH); | |
| 9f52af43 | 11 | MODULE_PARM_DESC(delay, "debouncing delay (ms), default: 10"); |
| ab5ed215 MG |
12 | |
| 13 | static int find_ms2_dev(struct device *dev, void *data) | |
| d1ff9643 MG |
14 | { |
| 15 | if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) { | |
| ab5ed215 | 16 | printk(KERN_INFO PREFIX "Found it\n"); |
| d1ff9643 MG |
17 | return 1; |
| 18 | } | |
| 19 | return 0; | |
| 20 | } | |
| b422e333 MG |
21 | |
| 22 | static int __init debounce_init(void) | |
| 23 | { | |
| d1ff9643 MG |
24 | struct device *event_dev = NULL; |
| 25 | struct gpio_event_platform_data *gpio_epd; | |
| 26 | struct gpio_event_info *gpio_ei; | |
| 27 | struct gpio_event_matrix_info *gpio_evmi; | |
| 28 | ||
| ab5ed215 | 29 | printk(KERN_INFO PREFIX "Searching for " GPIO_EVENT_DEV_NAME "...\n"); |
| d1ff9643 MG |
30 | |
| 31 | ||
| 32 | event_dev = device_find_child(&platform_bus, GPIO_EVENT_DEV_NAME, find_ms2_dev); | |
| 33 | if (event_dev == NULL) | |
| 34 | return -ENODEV; | |
| 35 | ||
| 36 | gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data; | |
| ab5ed215 | 37 | printk(KERN_INFO PREFIX "And there is a %s connected...\n", gpio_epd->name); |
| d1ff9643 MG |
38 | if (strcmp(gpio_epd->name, "sholes-keypad")) |
| 39 | return -ENODEV; | |
| 40 | ||
| 41 | gpio_ei = (struct gpio_event_info*)gpio_epd->info[0]; | |
| 42 | gpio_evmi = container_of(gpio_ei, struct gpio_event_matrix_info, info); | |
| 43 | ||
| ab5ed215 MG |
44 | printk(KERN_INFO PREFIX "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec); |
| 45 | printk(KERN_INFO PREFIX "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec); | |
| 46 | printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec); | |
| 47 | printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags); | |
| 20bf1c9e | 48 | |
| ab5ed215 MG |
49 | /* GPIOKPF_DEBOUNCE should already be set by GPIOKPF_REMOVE_PHANTOM_KEYS */ |
| 50 | if (!(gpio_evmi->flags & GPIOKPF_DEBOUNCE)) { | |
| 51 | printk(KERN_INFO PREFIX "Activating debounce\n"); | |
| 20bf1c9e | 52 | gpio_evmi->flags |= GPIOKPF_DEBOUNCE; |
| ab5ed215 MG |
53 | printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags); |
| 54 | } | |
| 55 | ||
| 56 | if (gpio_evmi->debounce_delay.tv.nsec != delay * NSEC_PER_MSEC) { | |
| 57 | printk(KERN_INFO PREFIX "Changing debounce_delay\n"); | |
| 58 | gpio_evmi->debounce_delay.tv.nsec = delay * NSEC_PER_MSEC; | |
| 59 | printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec); | |
| d1ff9643 MG |
60 | } |
| 61 | ||
| b422e333 MG |
62 | return 0; |
| 63 | } | |
| 64 | ||
| 65 | static void __exit debounce_exit(void) | |
| 66 | { | |
| 67 | } | |
| 68 | ||
| 69 | module_init(debounce_init); | |
| 70 | module_exit(debounce_exit); | |
| 71 | ||
| 72 | MODULE_LICENSE("GPL"); | |
| 73 | MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>"); |