tcl/target/stm32f4: ramp up JTAG speed, HSI is 16MHz there

Since all F4 parts have an internal HSI providing 16MHz, it's safe to
use 2MHz JTAG frequency by default.

Change-Id: I2702d5a1d642d4acd4af2db54c028949132c6900
Signed-off-by: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Reviewed-on: http://openocd.zylin.com/2383
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/tcl/target/stm32f4x.cfg b/tcl/target/stm32f4x.cfg
index ecd39de77ca5e82070364738007d4c26b7fb75bb..a7ec5eab3e18e5f59c3724c42520ed614cd933a9 100644 (file)
--- a/tcl/target/stm32f4x.cfg
+++ b/tcl/target/stm32f4x.cfg
@@ -73,13 +73,13 @@ $_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE
 set _FLASHNAME $_CHIPNAME.flash
 flash bank $_FLASHNAME stm32f2x 0 0 0 0 $_TARGETNAME
 
-# JTAG speed should be <= F_CPU/6. F_CPU after reset is 8MHz, so use F_JTAG = 1MHz
+# JTAG speed should be <= F_CPU/6. F_CPU after reset is 16MHz, so use F_JTAG = 2MHz
 #
 # Since we may be running of an RC oscilator, we crank down the speed a
 # bit more to be on the safe side. Perhaps superstition, but if are
 # running off a crystal, we can run closer to the limit. Note
 # that there can be a pretty wide band where things are more or less stable.
-adapter_khz 1000
+adapter_khz 2000
 
 adapter_nsrst_delay 100
 if {[using_jtag]} {