From: Erik Gilling <konkers@android.com>
Date: Mon, 2 Apr 2012 22:46:24 +0000 (-0700)
Subject: switch: add timestamps to switch driver
X-Git-Tag: firefly_0821_release~7613^2~147
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=499149639354dc2ca0ae0f45716511a5c3a8d533;p=firefly-linux-kernel-4.4.55.git

switch: add timestamps to switch driver

Change-Id: Iac5b5279f45fcc6e506d801cb5e9d6d2f6f6f9fa
Signed-off-by: Erik Gilling <konkers@android.com>
---

diff --git a/drivers/switch/switch_class.c b/drivers/switch/switch_class.c
index e05fc2591147..cd2456a3cbd8 100644
--- a/drivers/switch/switch_class.c
+++ b/drivers/switch/switch_class.c
@@ -22,6 +22,7 @@
 #include <linux/fs.h>
 #include <linux/err.h>
 #include <linux/switch.h>
+#include <linux/hrtimer.h>
 
 struct class *switch_class;
 static atomic_t device_count;
@@ -61,8 +62,9 @@ void switch_set_state(struct switch_dev *sdev, int state)
 {
 	char name_buf[120];
 	char state_buf[120];
+	char timestamp_buf[120];
 	char *prop_buf;
-	char *envp[3];
+	char *envp[4];
 	int env_offset = 0;
 	int length;
 
@@ -87,6 +89,9 @@ void switch_set_state(struct switch_dev *sdev, int state)
 					"SWITCH_STATE=%s", prop_buf);
 				envp[env_offset++] = state_buf;
 			}
+			snprintf(timestamp_buf, sizeof(timestamp_buf),
+				 "SWITCH_TIME=%llu", ktime_to_ns(ktime_get()));
+			envp[env_offset++] = timestamp_buf;
 			envp[env_offset] = NULL;
 			kobject_uevent_env(&sdev->dev->kobj, KOBJ_CHANGE, envp);
 			free_page((unsigned long)prop_buf);