X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/ms2-fixes/blobdiff_plain/b422e3333d93d3e54f65e0837af55ede54d73247..a6cf1017c8c88c76993e72e8d8ba46a7be431c80:/debounce.c

diff --git a/debounce.c b/debounce.c
index 8e13520..845adad 100644
--- a/debounce.c
+++ b/debounce.c
@@ -1,8 +1,64 @@
 #include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/gpio_event.h>
+
+#define PREFIX "debounce: "
+
+static int debounce_delay = 10;
+
+module_param(debounce_delay, int, S_IRUSR | S_IRGRP | S_IROTH);
+MODULE_PARM_DESC(debounce_delay, "debouncing delay (ms), default: 10");
+
+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 int __init debounce_init(void)
 {
-	printk(KERN_INFO "Hello Milestone2!\n");
+	struct device *event_dev = NULL;
+	struct gpio_event_platform_data *gpio_epd;
+	struct gpio_event_info *gpio_ei;
+	struct gpio_event_matrix_info *gpio_evmi;
+
+	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);
+
+	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);
+
+	/* GPIOKPF_DEBOUNCE should already be set by GPIOKPF_REMOVE_PHANTOM_KEYS */
+	if (!(gpio_evmi->flags & GPIOKPF_DEBOUNCE)) {
+		printk(KERN_INFO PREFIX "Activating debounce\n");
+		gpio_evmi->flags |= GPIOKPF_DEBOUNCE;
+		printk(KERN_INFO PREFIX "flags: 0x%x\n", gpio_evmi->flags);
+	}
+
+	if (gpio_evmi->debounce_delay.tv.nsec != debounce_delay * NSEC_PER_MSEC) {
+		printk(KERN_INFO PREFIX "Changing debounce_delay\n");
+		gpio_evmi->debounce_delay.tv.nsec = debounce_delay * NSEC_PER_MSEC;
+		printk(KERN_INFO PREFIX "debounce_delay: %u\n", gpio_evmi->debounce_delay.tv.nsec);
+	}
+
 	return 0;
 }