project update and jellybean fix (missing permission)
[ms2-fixes] / debounce.c
index ec20fdb..b69e1bc 100644 (file)
 #include <linux/device.h>
 #include <linux/platform_device.h>
 #include <linux/gpio_event.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <mach/gpio.h>
+#include <linux/earlysuspend.h>
+#include <linux/wakelock.h>
+#include <plat/board-mapphone.h>
 
-int find_ms2_dev(struct device *dev, void *data)
+#define PREFIX "debounce: "
+
+#define PADCONF_PULL_UP                ( OMAP343X_PADCONF_OFF_WAKEUP_ENABLED | \
+                               OMAP343X_PADCONF_INPUT_ENABLED | \
+                               OMAP343X_PADCONF_PULL_UP | \
+                               OMAP343X_PADCONF_PUD_ENABLED | \
+                               OMAP343X_PADCONF_MUXMODE4 )
+
+#define PADCONF_PULL_DOWN      ( OMAP343X_PADCONF_OFF_WAKEUP_ENABLED | \
+                               OMAP343X_PADCONF_INPUT_ENABLED | \
+                               OMAP343X_PADCONF_PULL_DOWN | \
+                               OMAP343X_PADCONF_PUD_ENABLED | \
+                               OMAP343X_PADCONF_MUXMODE4 )
+
+#define OMAP_CTRL_REGADDR(reg)            (OMAP2_L4_IO_ADDRESS(OMAP343X_CTRL_BASE) + (reg))
+
+static unsigned old_flags = 0;
+static ktime_t old_debounce_delay;
+static ktime_t old_settle_time;
+static ktime_t old_poll_time;
+static int (*old_sw_fixup)(int index);
+static struct gpio_event_matrix_info *gpio_evmi = NULL;
+static int hw_debounce = 0;
+static int hw_debounce_time = 0;
+
+struct gpio_event {
+       struct gpio_event_input_devs *input_devs;
+       const struct gpio_event_platform_data *info;
+       struct early_suspend early_suspend;
+       void *state[0];
+};
+
+struct gpio_kp {
+       struct gpio_event_input_devs *input_devs;
+       struct gpio_event_matrix_info *keypad_info;
+       struct hrtimer timer;
+       struct wake_lock wake_lock;
+       int current_output;
+       unsigned int use_irq:1;
+       unsigned int key_state_changed:1;
+       unsigned int last_key_state_changed:1;
+       unsigned int some_keys_pressed:2;
+       unsigned long keys_pressed[0];
+};
+
+static struct gpio_kp *gpio_kp_state = NULL;
+
+static int find_ms2_dev(struct device *dev, void *data)
 {
        if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) {
-               printk(KERN_INFO "Found it!\n");
+               printk(KERN_INFO PREFIX "Found it\n");
                return 1;
        }
        return 0;
 }
 
+/* hardware debounce: (time + 1) * 31us */
+static void hw_debounce_set(int enable, int time) {
+       int i;
+
+       if (gpio_evmi == NULL)
+               return;
+
+       for (i = 0; i < gpio_evmi->ninputs; i++) {
+               int gpio = gpio_evmi->input_gpios[i];
+
+               if ((time != -1) && (time != hw_debounce_time) && hw_debounce) {
+                       printk(KERN_INFO PREFIX "Setting hardware debounce time for GPIO %d to %d (%dus)\n", gpio, time, (time+1)*31);
+                       omap_set_gpio_debounce_time(gpio, time);
+               }
+
+               if ((enable != -1) && (enable != hw_debounce)) {
+                       printk(KERN_INFO PREFIX "%sabling hardware debounce for GPIO %d\n", (enable?"En":"Dis"), gpio);
+                       omap_set_gpio_debounce(gpio, enable);
+               }
+       }
+}
+
+static void set_irq_types(void) {
+       int err;
+       unsigned int irq;
+       unsigned long type;
+       int i;
+
+       if (gpio_evmi == NULL)
+               return;
+
+       switch (gpio_evmi->flags & (GPIOKPF_ACTIVE_HIGH|GPIOKPF_LEVEL_TRIGGERED_IRQ)) {
+       default:
+               type = IRQ_TYPE_EDGE_FALLING;
+               break;
+       case GPIOKPF_ACTIVE_HIGH:
+               type = IRQ_TYPE_EDGE_RISING;
+               break;
+       case GPIOKPF_LEVEL_TRIGGERED_IRQ:
+               type = IRQ_TYPE_LEVEL_LOW;
+               break;
+       case GPIOKPF_LEVEL_TRIGGERED_IRQ | GPIOKPF_ACTIVE_HIGH:
+               type = IRQ_TYPE_LEVEL_HIGH;
+               break;
+       }
+
+       printk(KERN_INFO PREFIX "Settinhg IRQ type to 0x%lx\n", type);
+
+       for (i = 0; i < gpio_evmi->ninputs; i++) {
+
+               err = irq = gpio_to_irq(gpio_evmi->input_gpios[i]);
+
+               if (err < 0)
+                       return;
+
+               err = set_irq_type(irq, type);
+       }
+}
+
+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);
+
+       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 ssize_t show_active_high_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_ACTIVE_HIGH) ? 1 : 0);
+}
+
+static ssize_t store_active_high_flag(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+       unsigned flag;
+       int i;
+
+       if (!gpio_evmi) 
+               return -ENODEV;
+
+       sscanf(buf, "%u", &flag);
+
+       if (flag) {
+               gpio_evmi->flags |= GPIOKPF_ACTIVE_HIGH;
+               for (i = 0x7a; i <= 0x88; i += 2) {
+                       __raw_writew(PADCONF_PULL_DOWN, OMAP_CTRL_REGADDR(i));
+               }
+       } else {
+               gpio_evmi->flags &= ~GPIOKPF_ACTIVE_HIGH;
+               for (i = 0x7a; i <= 0x88; i += 2) {
+                       __raw_writew(PADCONF_PULL_UP, OMAP_CTRL_REGADDR(i));
+               }
+       }
+
+       set_irq_types();
+
+       return count;
+}
+
+static ssize_t show_level_triggered_irq_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_LEVEL_TRIGGERED_IRQ) ? 1 : 0);
+}
+
+static ssize_t store_level_triggered_irq_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_LEVEL_TRIGGERED_IRQ;
+       } else {
+               gpio_evmi->flags &= ~GPIOKPF_LEVEL_TRIGGERED_IRQ;
+       }
+
+       set_irq_types();
+
+       return count;
+}
+
+static ssize_t show_drive_inactive_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_DRIVE_INACTIVE) ? 1 : 0);
+}
+
+static ssize_t store_drive_inactive_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_DRIVE_INACTIVE;
+       } else {
+               gpio_evmi->flags &= ~GPIOKPF_DRIVE_INACTIVE;
+       }
+
+       return count;
+}
+
+static ssize_t show_hw_debounce(struct device *dev, struct device_attribute *attr, char *buf)
+{
+       return snprintf(buf, PAGE_SIZE, "%d\n", hw_debounce);
+}
+
+static ssize_t store_hw_debounce(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+       int enable;
+
+       sscanf(buf, "%d", &enable);
+
+       if (enable) {
+               hw_debounce_set(1, -1);
+               hw_debounce = 1;
+       }
+       else {
+               hw_debounce_set(-1, 0);
+               hw_debounce_set(0, -1);
+               hw_debounce = 0;
+               hw_debounce_time = 0;
+       }
+
+       return count;
+}
+
+static ssize_t show_hw_debounce_time(struct device *dev, struct device_attribute *attr, char *buf)
+{
+       return snprintf(buf, PAGE_SIZE, "%d\n", hw_debounce_time);
+}
+
+static ssize_t store_hw_debounce_time(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
+{
+       int time;
+
+       sscanf(buf, "%d", &time);
+
+       if ((time < 0) || (time > 0xff))
+               return count;
+
+       if (!hw_debounce)
+               return count;
+
+       hw_debounce_set(-1, time);
+       hw_debounce_time = time;
+
+       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 DEVICE_ATTR(active_high_flag, (S_IRUGO | S_IWUGO), show_active_high_flag, store_active_high_flag);
+static DEVICE_ATTR(level_triggered_irq_flag, (S_IRUGO | S_IWUGO), show_level_triggered_irq_flag, store_level_triggered_irq_flag);
+static DEVICE_ATTR(drive_inactive_flag, (S_IRUGO | S_IWUGO), show_drive_inactive_flag, store_drive_inactive_flag);
+static DEVICE_ATTR(hw_debounce, (S_IRUGO | S_IWUGO), show_hw_debounce, store_hw_debounce);
+static DEVICE_ATTR(hw_debounce_time, (S_IRUGO | S_IWUGO), show_hw_debounce_time, store_hw_debounce_time);
+
+#if 0
+static int debounce_fixup(int index)
+{
+       int ret;
+
+       printk(KERN_INFO PREFIX "key_state_changed: %d, last_key_state_changed: %d, some_keys_pressed: %d\n",
+               gpio_kp_state->key_state_changed,
+               gpio_kp_state->last_key_state_changed,
+               gpio_kp_state->some_keys_pressed);
+
+       ret = old_sw_fixup(index);
+       if (!ret)
+               printk(KERN_INFO PREFIX "Index 0x%x ignored!\n", index);
+
+       return ret;
+}
+#endif
+
+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 platform_device *pdev = NULL;
        struct gpio_event_platform_data *gpio_epd;
        struct gpio_event_info *gpio_ei;
-       struct gpio_event_matrix_info *gpio_evmi;
-
-       printk(KERN_INFO "Searching for " GPIO_EVENT_DEV_NAME "...\n");
+       struct gpio_event *gpio_e;
+       int err = 0;
+       int i;
 
+       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;
-
+       
+       pdev = container_of(event_dev, struct platform_device, dev);
+       if (pdev == NULL)
+               return -ENODEV;
+       
        gpio_epd = (struct gpio_event_platform_data*)event_dev->platform_data;
-       printk(KERN_INFO "And there is a %s connected...\n", gpio_epd->name);
+       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);
 
-       printk(KERN_INFO "settle_time: %u\n", gpio_evmi->settle_time.tv.nsec);
-       printk(KERN_INFO "poll_time: %u\n", gpio_evmi->poll_time.tv.nsec);
-       printk(KERN_INFO "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
-       if (!gpio_evmi->debounce_delay.tv.nsec) {
-               printk(KERN_INFO "Activating debounce!\n");
-               gpio_evmi->debounce_delay.tv.nsec = 5 * NSEC_PER_MSEC;
-               printk(KERN_INFO "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
+       gpio_e = platform_get_drvdata(pdev);
+       printk(KERN_INFO PREFIX "Number of states: %d\n", gpio_e->info->info_count);
+
+       /* Search for correct gpio_event state */
+       for (i = 0; i < gpio_e->info->info_count; i++) {
+               if (gpio_e->info->info[i]->func == gpio_ei->func) {
+                       printk(KERN_INFO PREFIX "Keypad state: %d\n", i);
+                       gpio_kp_state = gpio_e->state[i];
+               }
+       }
+
+       if (!gpio_kp_state) {
+               printk(KERN_ERR PREFIX "Can't determine correct keypad state!\n");
+               return -ENODEV;
+       }
+
+       printk(KERN_INFO PREFIX "kp_use_irq: %d\n", gpio_kp_state->use_irq);
+#if 0
+       gpio_kp_state->use_irq=0;
+       hrtimer_start(&(gpio_kp_state->timer), gpio_evmi->poll_time, HRTIMER_MODE_REL);
+       printk(KERN_INFO PREFIX "kp_use_irq: %d\n", gpio_kp_state->use_irq);
+#endif
+
+       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);
+       err = device_create_file(&debounce_device, &dev_attr_active_high_flag);
+       err = device_create_file(&debounce_device, &dev_attr_level_triggered_irq_flag);
+       err = device_create_file(&debounce_device, &dev_attr_drive_inactive_flag);
+       err = device_create_file(&debounce_device, &dev_attr_hw_debounce);
+       err = device_create_file(&debounce_device, &dev_attr_hw_debounce_time);
+
+       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;
+       old_sw_fixup = gpio_evmi->sw_fixup;
+
+#if 0
+       printk(KERN_INFO PREFIX "Registering fixup handler\n");
+       gpio_evmi->sw_fixup = debounce_fixup;
+#endif
+
        return 0;
 }
 
 static void __exit debounce_exit(void)
 {
+       int i;
+
+       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);
+                       if (gpio_evmi->flags & GPIOKPF_ACTIVE_HIGH) {
+                               for (i = 0x7a; i <= 0x88; i += 2) {
+                                       __raw_writew(PADCONF_PULL_DOWN, OMAP_CTRL_REGADDR(i));
+                               }
+                       } else {
+                               for (i = 0x7a; i <= 0x88; i += 2) {
+                                       __raw_writew(PADCONF_PULL_UP, OMAP_CTRL_REGADDR(i));
+                               }
+                       }
+                       set_irq_types();
+               }
+               gpio_evmi->settle_time = old_settle_time;
+               gpio_evmi->poll_time = old_poll_time;
+
+               if (gpio_evmi->sw_fixup != old_sw_fixup) {
+                       printk(KERN_INFO PREFIX "Restoring fixup handler\n");
+                       gpio_evmi->sw_fixup = old_sw_fixup;
+               }
+       }
+       hw_debounce_set(0, 0);
+       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_remove_file(&debounce_device, &dev_attr_active_high_flag);
+       device_remove_file(&debounce_device, &dev_attr_level_triggered_irq_flag);
+       device_remove_file(&debounce_device, &dev_attr_drive_inactive_flag);
+       device_remove_file(&debounce_device, &dev_attr_hw_debounce);
+       device_remove_file(&debounce_device, &dev_attr_hw_debounce_time);
+       device_unregister(&debounce_device);
 }
 
 module_init(debounce_init);
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