ftdi: fix adapter_init rclk fallback

[openocd.git] / src / jtag / drivers / ftdi.c

diff --git a/src/jtag/drivers/ftdi.c b/src/jtag/drivers/ftdi.c
index 0a2aec2225e0026b5a0604af4e1d91551f11f2b0..f04b390c1717b1c541c2e3e81fa9daa1cbda8ff3 100644 (file)
--- a/src/jtag/drivers/ftdi.c
+++ b/src/jtag/drivers/ftdi.c
@@ -247,6 +247,11 @@ static int ftdi_speed_div(int speed, int *khz)
 
 static int ftdi_khz(int khz, int *jtag_speed)
 {
+       if (khz == 0 && !mpsse_is_high_speed(mpsse_ctx)) {
+               LOG_DEBUG("RCLK not supported");
+               return ERROR_FAIL;
+       }
+
        *jtag_speed = khz * 1000;
        return ERROR_OK;
 }