[PATCH 2/6] lib: add small helpers top get/set /sys/power/pm_debug_messages

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

This is required to twiddle this control sys entry for PM debugging
messages when going into S3 and S4.

Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/lib/include/fwts.h          |  1 +
 src/lib/include/fwts_pm_debug.h | 25 ++++++++++++++++++
 src/lib/src/Makefile.am         |  1 +
 src/lib/src/fwts_pm_debug.c     | 47 +++++++++++++++++++++++++++++++++
 4 files changed, 74 insertions(+)
 create mode 100644 src/lib/include/fwts_pm_debug.h
 create mode 100644 src/lib/src/fwts_pm_debug.c

diff --git a/src/lib/include/fwts.h b/src/lib/include/fwts.h
index 9428814b..c3b43534 100644
--- a/src/lib/include/fwts.h
+++ b/src/lib/include/fwts.h
@@ -128,5 +128,6 @@
 #include "fwts_pci.h"
 #include "fwts_safe_mem.h"
 #include "fwts_devicetree.h"
+#include "fwts_pm_debug.h"
 
 #endif
diff --git a/src/lib/include/fwts_pm_debug.h b/src/lib/include/fwts_pm_debug.h
new file mode 100644
index 00000000..fb5eed13
--- /dev/null
+++ b/src/lib/include/fwts_pm_debug.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2013-2018 Canonical
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+#ifndef __FWTS_PM_DEBUG_H__
+#define __FWTS_PM_DEBUG_H__
+
+int fwts_pm_debug_get(int *value);
+int fwts_pm_debug_set(const int value);
+
+#endif
diff --git a/src/lib/src/Makefile.am b/src/lib/src/Makefile.am
index fa232451..d067fe11 100644
--- a/src/lib/src/Makefile.am
+++ b/src/lib/src/Makefile.am
@@ -104,4 +104,5 @@ libfwts_la_SOURCES = 		\
 	fwts_wakealarm.c 	\
 	fwts_pm_method.c	\
 	fwts_safe_mem.c		\
+	fwts_pm_debug.c		\
 	$(dt_sources)
diff --git a/src/lib/src/fwts_pm_debug.c b/src/lib/src/fwts_pm_debug.c
new file mode 100644
index 00000000..861c6748
--- /dev/null
+++ b/src/lib/src/fwts_pm_debug.c
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2018 Canonical
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "fwts.h"
+
+static const char pm_debug[] = "/sys/power/pm_debug_messages";
+
+/*
+ *  fwts_pm_debug_get
+ *	get the current pm_debug_messages setting, value
+ *	is also set to -1 if there is an error
+ */
+int fwts_pm_debug_get(int *value)
+{
+	int ret;
+
+	ret = fwts_get_int(pm_debug, value);
+	if (ret != FWTS_OK)
+		*value = -1;
+
+	return ret;
+}
+
+/*
+ *  fwts_pm_debug_set
+ *	set the pm_debug_messages setting
+ */
+int fwts_pm_debug_set(const int value)
+{
+	return fwts_set_int(pm_debug, value);
+}
-- 
2.17.0