[PATCH v3] platform/chrome: cros_ec_trace: update generating script

[Tzung-Bi Shih <tzungbi@google.com>]

To remove ", \" from the last line.

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
---
Changes from v1:
- simpler awk code
Changes from v2:
- use c style comments instead of c++ style
- use '@' delimiter in sed instead of '/' to avoid unintentional end of
  comment "*/"

 drivers/platform/chrome/cros_ec_trace.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_trace.c b/drivers/platform/chrome/cros_ec_trace.c
index 0a76412095a9..f6034b774f9a 100644
--- a/drivers/platform/chrome/cros_ec_trace.c
+++ b/drivers/platform/chrome/cros_ec_trace.c
@@ -5,8 +5,21 @@
 
 #define TRACE_SYMBOL(a) {a, #a}
 
-// Generate the list using the following script:
-// sed -n 's/^#define \(EC_CMD_[[:alnum:]_]*\)\s.*/\tTRACE_SYMBOL(\1), \\/p' include/linux/mfd/cros_ec_commands.h
+/*
+ * Generate the list using the following script:
+ * sed -n 's@^#define \(EC_CMD_[[:alnum:]_]*\)\s.*@\tTRACE_SYMBOL(\1), \\@p' \
+ * include/linux/mfd/cros_ec_commands.h | awk '
+ * {
+ *   if (NR != 1)
+ *     print buf;
+ *   buf = $0;
+ * }
+ * END {
+ *   gsub(/, \\/, "", buf);
+ *   print buf;
+ * }
+ * '
+ */
 #define EC_CMDS \
 	TRACE_SYMBOL(EC_CMD_PROTO_VERSION), \
 	TRACE_SYMBOL(EC_CMD_HELLO), \
-- 
2.22.0.709.g102302147b-goog