The patch titled
PPS: LinuxPPS clients support
has been added to the -mm tree. Its filename is
pps-linuxpps-clients-support.patch
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------------------------------------------------------
Subject: PPS: LinuxPPS clients support
From: Rodolfo Giometti <giometti@xxxxxxxx>
Each PPS source can be registered/deregistered into the system by using
special modules called "clients". They simply define the PPS sources'
attributes and implement the time signal registartion mechanism.
This patch adds a special directory for such clients and adds a dummy client
that can be useful to test system integrity on real systems.
Signed-off-by: Rodolfo Giometti <giometti@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pps/Kconfig | 2
drivers/pps/Makefile | 1
drivers/pps/clients/Kconfig | 18 +++++
drivers/pps/clients/Makefile | 9 ++
drivers/pps/clients/ktimer.c | 114 +++++++++++++++++++++++++++++++++
5 files changed, 144 insertions(+)
diff -puN drivers/pps/Kconfig~pps-linuxpps-clients-support drivers/pps/Kconfig
--- a/drivers/pps/Kconfig~pps-linuxpps-clients-support
+++ a/drivers/pps/Kconfig
@@ -30,4 +30,6 @@ config PPS_DEBUG
messages to the system log. Select this if you are having a
problem with PPS support and want to see more of what is going on.
+source drivers/pps/clients/Kconfig
+
endmenu
diff -puN drivers/pps/Makefile~pps-linuxpps-clients-support drivers/pps/Makefile
--- a/drivers/pps/Makefile~pps-linuxpps-clients-support
+++ a/drivers/pps/Makefile
@@ -4,5 +4,6 @@
pps_core-y := pps.o kapi.o sysfs.o
obj-$(CONFIG_PPS) := pps_core.o
+obj-y += clients/
ccflags-$(CONFIG_PPS_DEBUG) := -DDEBUG
diff -puN /dev/null drivers/pps/clients/Kconfig
--- /dev/null
+++ a/drivers/pps/clients/Kconfig
@@ -0,0 +1,18 @@
+#
+# PPS clients configuration
+#
+
+if PPS
+
+comment "PPS clients support"
+
+config PPS_CLIENT_KTIMER
+ tristate "Kernel timer client (Testing client, use for debug)"
+ help
+ If you say yes here you get support for a PPS debugging client
+ which uses a kernel timer to generate the PPS signal.
+
+ This driver can also be built as a module. If so, the module
+ will be called ktimer.ko.
+
+endif
diff -puN /dev/null drivers/pps/clients/Makefile
--- /dev/null
+++ a/drivers/pps/clients/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for PPS clients.
+#
+
+obj-$(CONFIG_PPS_CLIENT_KTIMER) += ktimer.o
+
+ifeq ($(CONFIG_PPS_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
diff -puN /dev/null drivers/pps/clients/ktimer.c
--- /dev/null
+++ a/drivers/pps/clients/ktimer.c
@@ -0,0 +1,114 @@
+/*
+ * ktimer.c -- kernel timer test client
+ *
+ *
+ * Copyright (C) 2005-2006 Rodolfo Giometti <giometti@xxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/timer.h>
+
+#include <linux/pps.h>
+
+/*
+ * Global variables
+ */
+
+static int source;
+static struct timer_list ktimer;
+
+/*
+ * The kernel timer
+ */
+
+static void pps_ktimer_event(unsigned long ptr)
+{
+ pr_info("PPS event at %lu\n", jiffies);
+
+ pps_event(source, PPS_CAPTUREASSERT, NULL);
+
+ mod_timer(&ktimer, jiffies + HZ);
+}
+
+/*
+ * The echo function
+ */
+
+static void pps_ktimer_echo(int source, int event, void *data)
+{
+ pr_info("echo %s %s for source %d\n",
+ event & PPS_CAPTUREASSERT ? "assert" : "",
+ event & PPS_CAPTURECLEAR ? "clear" : "",
+ source);
+}
+
+/*
+ * The PPS info struct
+ */
+
+static struct pps_source_info pps_ktimer_info = {
+ .name = "ktimer",
+ .path = "",
+ .mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT | \
+ PPS_ECHOASSERT | \
+ PPS_CANWAIT | PPS_TSFMT_TSPEC,
+ .echo = pps_ktimer_echo,
+ .owner = THIS_MODULE,
+};
+
+/*
+ * Module staff
+ */
+
+static void __exit pps_ktimer_exit(void)
+{
+ del_timer_sync(&ktimer);
+ pps_unregister_source(source);
+
+ pr_info("ktimer PPS source unregistered\n");
+}
+
+static int __init pps_ktimer_init(void)
+{
+ int ret;
+
+ ret = pps_register_source(&pps_ktimer_info,
+ PPS_CAPTUREASSERT | PPS_OFFSETASSERT);
+ if (ret < 0) {
+ printk(KERN_ERR "cannot register ktimer source\n");
+ return ret;
+ }
+ source = ret;
+
+ setup_timer(&ktimer, pps_ktimer_event, 0);
+ mod_timer(&ktimer, jiffies + HZ);
+
+ pr_info("ktimer PPS source registered at %d\n", source);
+
+ return 0;
+}
+
+module_init(pps_ktimer_init);
+module_exit(pps_ktimer_exit);
+
+MODULE_AUTHOR("Rodolfo Giometti <giometti@xxxxxxxx>");
+MODULE_DESCRIPTION("dummy PPS source by using a kernel timer (just for debug)");
+MODULE_LICENSE("GPL");
_
Patches currently in -mm which might be from giometti@xxxxxxxx are
linuxpps-core-support.patch
pps-userland-header-file-for-pps-api.patch
pps-documentation-programs-and-examples.patch
pps-linuxpps-clients-support.patch
pps-serial-clients-support.patch
pps-example-program-to-enable-pps-support-on-serial-ports.patch
pps-parallel-port-clients-support.patch
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