From: Michael Gernoth <michael@gernoth.net>
Date: Wed, 18 May 2011 21:17:04 +0000 (+0200)
Subject: set keypad debounce time to 5 ms
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/ms2-fixes/commitdiff_plain/d1ff9643d914a61f1d1a08bdb5a5ac7ae665aa16?ds=sidebyside

set keypad debounce time to 5 ms
---

diff --git a/debounce.c b/debounce.c
index 8e13520..ec20fdb 100644
--- a/debounce.c
+++ b/debounce.c
@@ -1,8 +1,48 @@
 #include <linux/module.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/gpio_event.h>
+
+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");
+		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 "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 "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);
+	}
+
 	return 0;
 }