Introduce port debouncing mechanism in mv_gpio driver

[mkm_semihalf.com]

Summary

This patch introduces gpio debouncing mechanism
with fixed memory allocation in critical section.

When you press button, value at gpio pin connected to button
is changing many times which will cause in unexpected behaviour.
Debouncing mechanism will prevent this phenomenon

head/sys/arm/mv/gpio.c

+# Created by: Herve Quiroz <[e-mail]>
+# $FreeBSD$
+
+PORTNAME=       commons-configuration
+PORTVERSION=    1.10
+CATEGORIES=     devel java
+MASTER_SITES=   APACHE_COMMONS_BINARIES
+PKGNAMEPREFIX=  apache-
+DISTNAME=       ${PORTNAME}-${PORTVERSION}-bin
+
+MAINTAINER=     [e-mail]
+COMMENT=        Java package for the reading of configuration/preferences files
+
+LICENSE=        APACHE20
+
+RUN_DEPENDS=        ${JAVALIBDIR}/commons-beanutils.jar:java/jakarta-commons-beanutils \
+                ${JAVALIBDIR}/commons-lang.jar:java/jakarta-commons-lang \
+                ${JAVALIBDIR}/commons-logging.jar:java/apache-commons-logging
+
+WRKSRC=                ${WRKDIR}/${PORTNAME}-${PORTVERSION}
+
+OPTIONS_DEFINE= DOCS
+
+USE_JAVA=       yes
+JAVA_VERSION=   1.6+
+NO_BUILD=       yes
+
+PORTDOCS=       *
+PLIST_FILES+=   %%JAVAJARDIR%%/${PORTNAME}.jar
+
+do-install:
+        ${INSTALL_DATA} ${WRKSRC}/${PORTNAME}-${PORTVERSION}.jar \
+                ${STAGEDIR}${JAVAJARDIR}/${PORTNAME}.jar
+        cd ${WRKSRC}/apidocs && ${FIND} . -type d -exec ${MKDIR} \
+                ${STAGEDIR}${DOCSDIR}/{} \;
+        cd ${WRKSRC}/apidocs && ${FIND} . -type f -exec ${INSTALL_DATA} {} \
+                ${STAGEDIR}${DOCSDIR}/{} \;
+
+.include <bsd.port.mk>

head/sys/arm/mv/mvreg.h

+# Created by: Herve Quiroz <[e-mail]>
+# $FreeBSD$
+
+PORTNAME=       commons-configuration
+PORTVERSION=    1.10
+CATEGORIES=     devel java
+MASTER_SITES=   APACHE_COMMONS_BINARIES
+PKGNAMEPREFIX=  apache-
+DISTNAME=       ${PORTNAME}-${PORTVERSION}-bin
+
+MAINTAINER=     [e-mail]
+COMMENT=        Java package for the reading of configuration/preferences files
+
+LICENSE=        APACHE20
+
+RUN_DEPENDS=        ${JAVALIBDIR}/commons-beanutils.jar:java/jakarta-commons-beanutils \
+                ${JAVALIBDIR}/commons-lang.jar:java/jakarta-commons-lang \
+                ${JAVALIBDIR}/commons-logging.jar:java/apache-commons-logging
+
+WRKSRC=                ${WRKDIR}/${PORTNAME}-${PORTVERSION}
+
+OPTIONS_DEFINE= DOCS
+
+USE_JAVA=       yes
+JAVA_VERSION=   1.6+
+NO_BUILD=       yes
+
+PORTDOCS=       *
+PLIST_FILES+=   %%JAVAJARDIR%%/${PORTNAME}.jar
+
+do-install:
+        ${INSTALL_DATA} ${WRKSRC}/${PORTNAME}-${PORTVERSION}.jar \
+                ${STAGEDIR}${JAVAJARDIR}/${PORTNAME}.jar
+        cd ${WRKSRC}/apidocs && ${FIND} . -type d -exec ${MKDIR} \
+                ${STAGEDIR}${DOCSDIR}/{} \;
+        cd ${WRKSRC}/apidocs && ${FIND} . -type f -exec ${INSTALL_DATA} {} \
+                ${STAGEDIR}${DOCSDIR}/{} \;
+
+.include <bsd.port.mk>

head/sys/arm/mv/mvvar.h

+# Created by: Herve Quiroz <[e-mail]>
+# $FreeBSD$
+
+PORTNAME=       commons-configuration
+PORTVERSION=    1.10
+CATEGORIES=     devel java
+MASTER_SITES=   APACHE_COMMONS_BINARIES
+PKGNAMEPREFIX=  apache-
+DISTNAME=       ${PORTNAME}-${PORTVERSION}-bin
+
+MAINTAINER=     [e-mail]
+COMMENT=        Java package for the reading of configuration/preferences files
+
+LICENSE=        APACHE20
+
+RUN_DEPENDS=        ${JAVALIBDIR}/commons-beanutils.jar:java/jakarta-commons-beanutils \
+                ${JAVALIBDIR}/commons-lang.jar:java/jakarta-commons-lang \
+                ${JAVALIBDIR}/commons-logging.jar:java/apache-commons-logging
+
+WRKSRC=                ${WRKDIR}/${PORTNAME}-${PORTVERSION}
+
+OPTIONS_DEFINE= DOCS
+
+USE_JAVA=       yes
+JAVA_VERSION=   1.6+
+NO_BUILD=       yes
+
+PORTDOCS=       *
+PLIST_FILES+=   %%JAVAJARDIR%%/${PORTNAME}.jar
+
+do-install:
+        ${INSTALL_DATA} ${WRKSRC}/${PORTNAME}-${PORTVERSION}.jar \
+                ${STAGEDIR}${JAVAJARDIR}/${PORTNAME}.jar
+        cd ${WRKSRC}/apidocs && ${FIND} . -type d -exec ${MKDIR} \
+                ${STAGEDIR}${DOCSDIR}/{} \;
+        cd ${WRKSRC}/apidocs && ${FIND} . -type f -exec ${INSTALL_DATA} {} \
+                ${STAGEDIR}${DOCSDIR}/{} \;
+
+.include <bsd.port.mk>