Allow flashing of EC binary from host with multiple servod invocations.

Adds argument --port to provide ability to flash from host that has
multiple servos running.

BRANCH=none
BUG=none
TEST=manual,

./util/flash_ec --board spring
- device connected to servod @ port 9999 is successfully flashed

./util/flash_ec --board spring --port 9902
- device connected to servod @ port 9902 is successfully flashed

Signed-off-by: Todd Broch <tbroch@chromium.org>
Change-Id: Iecc4b8df51236a1f21be5feca8bb87f5a1d03e97
Reviewed-on: https://gerrit.chromium.org/gerrit/43182
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

1 files changed, 7 insertions, 4 deletions

diff --git a/util/flash_ec b/util/flash_ec
index 4031250fd3..192b3efee2 100755
--- a/util/flash_ec
+++ b/util/flash_ec
@@ -12,10 +12,12 @@ DEFINE_string board "${DEFAULT_BOARD}" \
 	"The board to run debugger on."
 DEFINE_string image "" \
 	"Full pathname of the EC firmware image to flash."
-DEFINE_boolean ro "${FLAGS_FALSE}" \
-	"Write only the read-only partition"
 DEFINE_string offset "0" \
 	"Offset where to program the image from."
+DEFINE_integer port 9999 \
+	"Port to communicate to servo on."
+DEFINE_boolean ro "${FLAGS_FALSE}" \
+	"Write only the read-only partition"
 DEFINE_boolean unprotect "${FLAGS_FALSE}" \
 	"Clear the protect flag."
 
@@ -76,7 +78,8 @@ function ec_image() {
 # Find the EC UART on the servo v2
 function ec_uart() {
 	SERVOD_FAIL="Cannot communicate with servo. is servod running ?"
-	(dut-control uart1_pty || die "${SERVOD_FAIL}") | cut -d: -f2
+	(dut-control --port=${FLAGS_port} uart1_pty || \
+            die "${SERVOD_FAIL}") | cut -d: -f2
 }
 
 # Servo variables management
@@ -85,7 +88,7 @@ SERVO_VARS="uart1_en uart1_parity uart1_baudrate \
 jtag_buf_on_flex_en jtag_buf_en spi1_vref"
 
 function dut_control() {
-	dut-control "$1" >/dev/null
+	dut-control --port=${FLAGS_port} "$1" >/dev/null
 }
 
 function servo_save() {