Arm ps2 mouse interrupt (#6490)

* ps2_mouse on ARM: an interrupt-version of the ps2-mouse code ported to ARM/chibios

* ps2_mouse on ARM: link EXT callback-channel selection to the user defined PS2_LINE_CLOCK

* ps2_mouse on ARM: replace DELAY_X defines with hardware-agnostic wait_X

* ps2_mouse on ARM: replace chibios-specific defines for the pins/lines with defines from quantum/config_common.h

and drop the '_LINE' component from teh define name

* ps2_mouse on ARM: expose the software-intterupt port as a user editable define

* Update docs/feature_ps2_mouse.md

Co-Authored-By: Hugo van Kemenade <hugovk@users.noreply.github.com>

* Update feature_ps2_mouse.md

* use a define to deduce the PS_DATA_PORT instead

* reduce all-zero extcfg to oneliner

* ps2_mouse: use generic wait instead of avr-delay

* Update docs/feature_ps2_mouse.md

* ps2_mouse: changes for new chibios version

(17.6.0 -> 19.1.0)
replacing the legacy externa-interrupt driver with pal-callbacks

* ps2_mouse: use PLATFORM_KEY

Co-Authored-By: Joel Challis <git@zvecr.com>

* ps2_mouse: clang-format corrections

* ps2_mouse: add systemlocks

using the chibios equivalent to AVRs cli: chSys[Unl|L]ock

Co-authored-by: Johannes <you@example.com>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>
Co-authored-by: Joel Challis <git@zvecr.com>

1 files changed, 26 insertions, 2 deletions

diff --git a/docs/feature_ps2_mouse.md b/docs/feature_ps2_mouse.md
index 8e84e22d8a..00c7ee72ee 100644
--- a/docs/feature_ps2_mouse.md
+++ b/docs/feature_ps2_mouse.md
@@ -50,7 +50,7 @@ In your keyboard config.h:
 #endif
 ```
 
-## Interrupt Version :id=interrupt-version
+### Interrupt Version (AVR/ATMega32u4) :id=interrupt-version-avr
 
 The following example uses D2 for clock and D5 for data. You can use any INT or PCINT pin for clock, and any pin for data.
 
@@ -88,7 +88,31 @@ In your keyboard config.h:
 #endif
 ```
 
-## USART Version :id=usart-version
+### Interrupt Version (ARM chibios) :id=interrupt-version-chibios
+
+Pretty much any two pins can be used for the (software) interrupt variant on ARM cores. The example below uses A8 for clock, and A9 for data.
+
+In rules.mk:
+
+```
+PS2_MOUSE_ENABLE = yes
+PS2_USE_INT = yes
+```
+
+In your keyboard config.h:
+
+```c
+#define PS2_CLOCK A8
+#define PS2_DATA  A9
+```
+
+And in the chibios specifig halconf.h:
+```c
+#define PAL_USE_CALLBACKS TRUE
+```
+
+
+### USART Version :id=usart-version
 
 To use USART on the ATMega32u4, you have to use PD5 for clock and PD2 for data. If one of those are unavailable, you need to use interrupt version.