boards/xtensa/esp32: add three missing defconfigs

[fdcavalcanti]

Summary

This PR adds three new defconfigs to esp32-devkitc: gpio, i2c and spi. Those are available on other boards but were missing from the esp32-devkitc.

• documentation: update ESP32 docs for spi, gpio and i2c

Adds description for the GPIO, SPI and I2C defconfigs for the
esp32-devkitc board.

• board/xtensa/esp32: add SPI defconfig

Add SPI defconfig for ESP32-DevKit-C.

• board/xtensa/esp32: add GPIO defconfig

Add a GPIO defconfig for ESP32-DevKit-C.

• boards/xtensa/esp32: add I2C defconfig and update board source

Add I2C defconfig to esp32-devkitc board and update some board
ifdefs.

• arch/xtensa/esp32: select I2C_DRIVER on I2C

Automatically select I2C_DRIVER when ESP32_I2C is selected.

Impact

Impact on user: New defconfigs available: gpio, spi, i2c.

Impact on build: No.

Impact on hardware: Only ESP32 devices.

Impact on documentation: Adds defconfig description on the esp32-devkitc page.

Impact on security: No.

Impact on compatibility: No.

Testing

Building

Build each of the new defconfigs and flash the board:

./tools/configure.sh esp32-devkitc:spi
./tools/configure.sh esp32-devkitc:i2c
./tools/configure.sh esp32-devkitc:gpio

Running

Merge and flash as usual.

Results

• SPI:

nsh> ls /dev
/dev:
 console
 null
 spi2
 ttyS0
 zero

nsh> spi bus
 BUS   EXISTS?
Bus 2: YES
Bus 3: NO

• GPIO:

nsh> ls /dev
/dev:
 console
 gpio0
 gpio1
 gpio2
 null
 ttyS0
 zero
nsh> gpio -o 1 /dev/gpio0
Driver: /dev/gpio0
  Output pin:    Value=0
  Writing:       Value=1
  Verify:        Value=1

• I2C:

nsh> ls /dev
/dev:
 console
 i2c0
 null
 ttyS0
 zero
nsh> i2c bus
 BUS   EXISTS?
Bus 0: YES
Bus 1: NO
Bus 2: NO
Bus 3: NO

[linguini1]

Hi @fdcavalcanti , try running ./tools/refresh.sh --defaults on the modified boards (I forget the syntax exactly but ./tools/refresh.sh --help will tell you) to normalize the configs. That should fix the CI errors

[fdcavalcanti]

Hi @fdcavalcanti , try running ./tools/refresh.sh --defaults on the modified boards (I forget the syntax exactly but ./tools/refresh.sh --help will tell you) to normalize the configs. That should fix the CI errors

Yes I did it but pushed to the wrong fork...
Should work now!

[acassis]

@fdcavalcanti nevermind, I found your Documentation :-)