Generic Pin Configuration - Pin Control Subsystem

Transcript

1. GENERIC PIN CONFIGURATION PIN CONTROL SUBSYSTEM Matheus Castello matheus@castello.eng.br
2. MATHEUS DE BARROS CASTELLO 27 year old, BS in Computer Science System SW Engineer at SIDIA since 2015 Linux Kernel Developer - pinctrl-bcm2835 contributions Maker Enthusiast in Spare Time WHO I AM ?
4. GENERIC PIN CONFIGURATION? PIN CONFIGURATION AND MULTIPLEXING PIN CONTROL SUBSYSTEM? DEVICE TREE BINDINGS?
5. PIN CONFIGURATION HOW KERNEL KNOW PERIPHERALS THAT ARE CONNECTED ?
6. PIN CONFIGURATION PC ARCHITECTURE - AUTO ENUMERATION BUS
7. PIN CONFIGURATION? EMBEDDED SYSTEMS - PERIPHERALS DIRECT CONNECTED TO GPIO
8. DEVICE TREE DEVICE TREE DESCRIBE HARDWARE TO KERNEL
9. DEVICE TREE
10. GPIO - PIN CONFIGURATION AND MULTIPLEXING PIN CONFIGURATION AND MULTIPLEXING
11. PIN CONFIGURATION AND MULTIPLEXING GPIO - GENERAL PURPOSE INPUT OUTPUT
12. SETTING UP GPIO PIN CONFIGURATION AND MULTIPLEXING PIN MULTIPLEXING PIN CONFIGURATION
13. SETTING UP GPIO PIN CONFIGURATION AND MULTIPLEXING PIN CONTROL SUBSYSTEM
14. PIN CONTROL DEVICE TREE BINDINGS DEFINE PIN CONTROL PROPERTIES Documentation/device-tre/bindings/pinctrl/brcm,bcm2835.txt
15. PIN CONTROL PARSE DEVICE TREE PINCTRL BINDINGS - APPLY IT IN CHIP REGISTERS drivers/pinctrl/bcm/pinctrl-bcm2835.c PARSE PINCTRL BINDINGS WRITE PIN CONF REGISTERS WRITE PIN MUX REGISTERS
16. REAL TESTING - SOUND CLAP DEVICE EXAMPLE OF USE IN DEVICE DRIVE
17. PINCTRL LIVE TEST CHANGING SOME DEVICE TREE
18. GENERIC PIN CONFIGURATION? HOUSE OF MOTHER JOAN
19. GENERIC PIN CONFIGURATION KEEPING PINCTRL SUSBSYSTEM SYNERGY
20. GENERIC PIN CONFIGURATION KEEPING PINCTRL SUSBSYSTEM SYNERGY
21. GENERIC PIN CONFIGURATION KEEPING PINCTRL SUSBSYSTEM SYNERGY
22. GENERIC PIN CONFIGURATION KEEPING PINCTRL SUSBSYSTEM EASY
23. GENERIC PIN CONFIGURATION KEEPING PINCTRL SUSBSYSTEM EASY
24. GENERIC PIN CONFIGURATION EACH VENDOR HAVE YOUR WAY TO APPLY MAPPED DATA
25. GENERIC PIN CONFIGURATION EACH VENDOR HAVE YOUR WAY TO APPLY MAPPED DATA
26. PINCTRL LIVE TEST CHANGING SOME DEVICE TREE
27. Q&A
28. Matheus Castello matheus@castello.eng.br THANK YOU