tree 5c71c2d8d777e780b97ae64d4d4b3efabd38cf2b
parent 081a23dd28c06c4564758310b8472c051ef0ac67
author Anthony DiGirolamo <tonymd@google.com> 1704751577 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> 1704751577 +0000

fpga_config: Check SPI Flash communication

- Check the SPI Flash chip is readable after the FPGA is configured
  over serial.

- This fixes SPI flash communication assuming
  ./out/gn/obj/fpga/toplevel/toplevel.bin is used to configure the
  FPGA.

  As of https://pigweed-review.googlesource.com/c/gonk/+/185890
  the SPI bus pins are set to inputs on the FPGA side which allows MCU
  to SPI flash chip communication.

- Small refactor removing global Arduino `SPI` usage in spi_flash.cc.

- Add ResumeFromPowerDown() to SpiFlash class.

Change-Id: Ibb3a32f3e762c6402f3ed0e4e07e639334e17e2a
Reviewed-on: https://pigweed-review.googlesource.com/c/gonk/+/185870
Reviewed-by: Eric Holland <hollande@google.com>
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Anthony DiGirolamo <tonymd@google.com>