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1What: /sys/bus/spi/<dev>/update_firmware2Date: Jul 20213Contact: sebastian.reichel@collabora.com4Description: Write 1 to this file to update the ACHC microcontroller5 firmware via the EzPort interface. For this the kernel6 will load "achc.bin" via the firmware API (so usually7 from /lib/firmware). The write will block until the FW8 has either been flashed successfully or an error occurred.9 10What: /sys/bus/spi/<dev>/reset11Date: Jul 202112Contact: sebastian.reichel@collabora.com13Description: This file represents the microcontroller's reset line.14 1 means the reset line is asserted, 0 means it's not15 asserted. The file is read and writable.16