silicann / blickwerk-boot

linux kernel and u-boot sources for blickwerk sensors
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Allow usage as GPIO for pin 26 #15

Open sumpfralle opened 4 years ago

sumpfralle commented 4 years ago

Currently GPIO 26 seems to be configured implicitly during kernel bootup (after u-boot). This results in a pull-up resistor being active.

Instead this pin is supposed to be used as a GPIO input. Its name could be something like analogwerk_spi_boot_busy (or something similar related to the SPI interface currently available as /dev/spidev32766.0).