Description

Enable uboot gpio command. This would allow to set up rk3318-box'es LED display in custom uboot script. For example, to show "boot", this snippet can be added (gpio pins and letter codes should be adjusted for different STB/LCD models):

  FD650_MODE_WRCMD='0 1 0 0 1 0 0 0'
  DISPON='0 0 0 0 0 0 0 1'
  FD655_BASE_ADDR='0 1 1 0 0 1 1 0'
  Z='0 0 0 0 0 0 0 0'
  B='0 1 1 0 0 1 1 1'
  O='0 1 1 0 0 0 1 1'
  T='0 1 0 0 0 1 1 1'
  setenv d0 gpio clear C22
  setenv d1 gpio set C22
  setenv LC gpio clear C19
  setenv HC gpio set C19
  setenv send 'run d0 LC; for b in $cmd; do run d$b HC LC; done; run HC d1'
  cmd="$FD650_MODE_WRCMD 1 $DISPON 1" run send
  cmd="$FD655_BASE_ADDR 1 $Z 1 $B 1 $O 1 $O 1 $T 1" run send

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• [x] Compile and boot rk3318-box

Checklist:

• [ ] My code follows the style guidelines of this project
• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published in downstream modules

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