tcl/interface/raspberrypi-native: adjust speed offsets

Change 7732: jtag/drivers/bcm2835gpio: Support all 54 GPIO pins [1]
reduces the time needed for GPIO handling.

Adjust the speed offsets to the new and faster bcm2835gpio code.

Measured with Sigrok/PulseView, sampled at 800 MHz.
Configured as SWD with the fast path in the driver - other
modes are expected to be slower.
Adjusted to keep all half periods of SWCLK in the sampled poll
sequence longer or equal than the half period of the nominal
adapter speed.

Link: [1] https://review.openocd.org/c/openocd/+/7732
Change-Id: Ia9e932dfd7547c8011c1d20d9e90bc0294050e8a
Signed-off-by: Tomas Vanek <[email protected]>
Reviewed-on: https://review.openocd.org/c/openocd/+/9234
Tested-by: jenkins
Reviewed-by: Vincent Fazio <[email protected]>

Author: tom-van

tcl/interface/raspberrypi-native.cfg

@@ -50,12 +50,12 @@ set clocks_per_timing_loop 4
 if {[string match *bcm2711* $compat]} {
 	set speed_offset 52
 } elseif {[string match *bcm2837* $compat] || [string match *bcm2710* $compat]} {
-	set speed_offset 34
+	set speed_offset 31
 } elseif {[string match *bcm2836* $compat] || [string match *bcm2709* $compat]} {
-	set speed_offset 36
+	set speed_offset 25
 } elseif {[string match *bcm2835* $compat] || [string match *bcm2708* $compat]} {
 	set clocks_per_timing_loop 6
-	set speed_offset 32
+	set speed_offset 23
 } elseif {[string match *bcm2712* $compat]} {
 	echo "Error: Raspberrypi Pi 5 has moved GPIOs to PCIe connected RP1 chip."
 	echo "Error: Native GPIO handling is not supported, use 'raspberrypi5-gpiod.cfg'"