Initial support for more current Raspberry Pi models (i.e. 5)

[cloudkucooland]

This PR is mostly me checking to see if work is already being done on this front.

I've been unable to determine how to get the GPIO/SPI on my Pi5 to work properly with this module. Before I put actual work in, I want to make sure the work isn't already being done elsewhere.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 27.2%. Comparing base (63e6b8c) to head (2764615).

Files with missing lines	Patch %	Lines
bcm283x/gpio.go	0.0%	10 Missing ⚠️
rpi/rpi.go	0.0%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main     #65     +/-   ##
=======================================
- Coverage   27.3%   27.2%   -0.0%     
=======================================
  Files         96      96             
  Lines      11815   11822      +7     
=======================================
  Hits        3220    3220             
- Misses      8460    8467      +7     
  Partials     135     135             

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[cloudkucooland]

scot@birdhouse:/home/scot/AlarmClock/ledserver % dmesg | grep -i gpio
[ 0.424898] sdhci-brcmstb 1000fff000.mmc: Got CD GPIO
[ 2.413069] rpi-gpiomem 107d508500.gpiomem: window base 0x107d508500 size 0x00000040
[ 2.413138] rpi-gpiomem 107d508500.gpiomem: initialised 1 regions as /dev/gpiomem1
[ 2.413745] rpi-gpiomem 107d517c00.gpiomem: window base 0x107d517c00 size 0x00000040
[ 2.414159] rpi-gpiomem 107d517c00.gpiomem: initialised 1 regions as /dev/gpiomem2
[ 2.414194] rpi-gpiomem 107d504100.gpiomem: window base 0x107d504100 size 0x00000020
[ 2.414231] rpi-gpiomem 107d504100.gpiomem: initialised 1 regions as /dev/gpiomem3
[ 2.414253] rpi-gpiomem 107d510700.gpiomem: window base 0x107d510700 size 0x00000020
[ 2.414344] rpi-gpiomem 107d510700.gpiomem: initialised 1 regions as /dev/gpiomem4
[ 2.414393] rpi-gpiomem 1f000d0000.gpiomem: window base 0x1f000d0000 size 0x00030000
[ 2.414440] rpi-gpiomem 1f000d0000.gpiomem: initialised 1 regions as /dev/gpiomem0

[cloudkucooland]

scot@birdhouse:/home/scot/AlarmClock/ledserver % sudo ~/go/bin/periph-info
Drivers loaded and their dependencies, if any:

• bcm283x-gpio : [ioctl-gpio]
• ioctl-gpio
• rpi : optional: [bcm283x-gpio]
• sysfs-gpio : [ioctl-gpio]
• sysfs-i2c
• sysfs-led
• sysfs-spi
• sysfs-thermal
  Drivers skipped and the reason why:
• allwinner-gpio-pl: no A64 CPU detected
• allwinner-gpio : no Allwinner CPU detected
• netlink-onewire : no onewire buses found
• pine64 : pine64 board not detected
  Drivers failed to load and the error:
• bcm283x-dma: pmem: mapping at 0xfe007000 failed: pmem: failed to memory map: invalid argument

[maruel]

Thanks!