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tcl/interface: fix raspberrypi2-native.cfg speed coefficient 

The speed coefficient for Raspberry Pi 2 was probably calibrated
for a scaled down clock frequency.

To prevent JTAG/SWD overclocking, use the value corresponding
to the 'official' maximum CPU clock.

Change-Id: Iaff58b092198dce6d6552c9d31d6a3ba4aaaa2d5
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: https://review.openocd.org/c/openocd/+/7305
Tested-by: jenkins
Reviewed-by: Jonathan Bell <jonathan@raspberrypi.com>
This commit is contained in:
Tomas Vanek 2022-11-03 08:48:53 +01:00
parent 4e077fddad
commit 1d04ef3e55
1 changed files with 2 additions and 2 deletions
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4
tcl/interface/raspberrypi2-native.cfg
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@ -15,9 +15,9 @@ adapter driver bcm2835gpio
bcm2835gpio peripheral_base 0x3F000000
# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
# These depend on system clock, calibrated for stock 700MHz
# These depend on system clock, calibrated for scaling_max_freq 900MHz
# bcm2835gpio speed SPEED_COEFF SPEED_OFFSET
bcm2835gpio speed_coeffs 146203 36
bcm2835gpio speed_coeffs 225000 36
# Each of the JTAG lines need a gpio number set: tck tms tdi tdo
# Header pin numbers: 23 22 19 21