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drivers/jlink: fix (again) calculate_swo_prescaler formula
[openocd.git] / src / jtag / drivers / jlink.c
diff --git a/src/jtag/drivers/jlink.c b/src/jtag/drivers/jlink.c
index 910799ce2f3b2e38c6b634408c89765b0566be29..ae8ce49c68e0431ec09a37cc6bd37f66b822bcd1 100644 (file)
--- a/src/jtag/drivers/jlink.c
+++ b/src/jtag/drivers/jlink.c
@@ -1269,8 +1269,7 @@ static uint32_t calculate_trace_buffer_size(void)
 static bool calculate_swo_prescaler(unsigned int traceclkin_freq,
                uint32_t trace_freq, uint16_t *prescaler)
 {
-       unsigned int presc;
-       presc = DIV_ROUND_UP(traceclkin_freq, trace_freq);
+       unsigned int presc = (traceclkin_freq + trace_freq / 2) / trace_freq;
        if (presc > TPIU_ACPR_MAX_SWOSCALER)
                return false;
 
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