Add i2c tracing support to atrace

Cherry-picking from internal master

Test: None
Change-Id: Iaf0daa0982bd8d2355d3590d43ad78711e764ee0

diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 320d11d..d39c5ce 100644 (file)
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -121,6 +121,17 @@ static const TracingCategory k_categories[] = {
         { REQ,      "/sys/kernel/debug/tracing/events/irq/enable" },
         { OPT,      "/sys/kernel/debug/tracing/events/ipi/enable" },
     } },
+    { "i2c",        "I2C Events",   0, {
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_read/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_write/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_result/enable" },
+        { REQ,      "/sys/kernel/debug/tracing/events/i2c/i2c_reply/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_read/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_write/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_result/enable" },
+        { OPT,      "/sys/kernel/debug/tracing/events/i2c/smbus_reply/enable" },
+    } },
     { "freq",       "CPU Frequency",    0, {
         { REQ,      "/sys/kernel/debug/tracing/events/power/cpu_frequency/enable" },
         { OPT,      "/sys/kernel/debug/tracing/events/power/clock_set_rate/enable" },

diff --git a/cmds/atrace/atrace.rc b/cmds/atrace/atrace.rc
index 747cc69..54ba5ca 100644 (file)
--- a/cmds/atrace/atrace.rc
+++ b/cmds/atrace/atrace.rc
@@ -54,6 +54,15 @@ on post-fs
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_lock/enable
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_locked/enable
     chmod 0664 /sys/kernel/debug/tracing/events/binder/binder_unlock/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_read/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_write/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_result/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/i2c_reply/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_read/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_write/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_result/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/i2c/smbus_reply/enable
 
     # Tracing disabled by default
     write /sys/kernel/debug/tracing/tracing_on 0