#include <linux/gpio_event.h>
#include <mach/gpio.h>
-/* hardware debounce: (value + 1) * 31us */
-#define GPIO_DEBOUNCE_TIME 0x1
-
#define PREFIX "debounce: "
static unsigned old_flags = 0;
-ktime_t old_debounce_delay;
-ktime_t old_settle_time;
-ktime_t old_poll_time;
+static ktime_t old_debounce_delay;
+static ktime_t old_settle_time;
+static ktime_t old_poll_time;
static struct gpio_event_matrix_info *gpio_evmi = NULL;
+static int hw_debounce = 0;
+static int hw_debounce_time = 0;
static int find_ms2_dev(struct device *dev, void *data)
{
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 ssize_t show_debounce_delay(struct device *dev, struct device_attribute *attr, char *buf)
{
if (!gpio_evmi)
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(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), show_active_high_flag, store_active_high_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);
static void debounce_release(struct device *dev)
{
.release = debounce_release,
};
-static unsigned int mapphone_col_gpios[] = { 43, 53, 54, 55, 56, 57, 58, 63 };
-static unsigned int mapphone_row_gpios[] = { 34, 35, 36, 37, 38, 39, 40, 41 };
-
-static void hw_debounce_pin(int gpio, int enable) {
- printk(KERN_INFO PREFIX "%sabling hardware debounce for GPIO %d\n", (enable?"En":"Dis"), gpio);
- if (enable)
- omap_set_gpio_debounce_time(gpio, GPIO_DEBOUNCE_TIME);
- omap_set_gpio_debounce(gpio, enable);
-}
-
-static void hw_debounce(int enable) {
- int i;
-
- for (i = 0; i < (sizeof(mapphone_col_gpios) / sizeof(mapphone_col_gpios[0])); i++) {
- hw_debounce_pin(mapphone_col_gpios[i], enable);
- }
-
- for (i = 0; i < (sizeof(mapphone_row_gpios) / sizeof(mapphone_row_gpios[0])); i++) {
- hw_debounce_pin(mapphone_row_gpios[i], enable);
- }
-}
-
static int __init debounce_init(void)
{
struct device *event_dev = NULL;
return err;
}
- hw_debounce(1);
-
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_print_phantom_keys_flag);
err = device_create_file(&debounce_device, &dev_attr_active_high_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);
gpio_evmi->settle_time = old_settle_time;
gpio_evmi->poll_time = old_poll_time;
}
- hw_debounce(0);
+ 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_print_phantom_keys_flag);
device_remove_file(&debounce_device, &dev_attr_active_high_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);
}
projects / ms2-fixes / blobdiff