U-boot Configuration

To enable GPIO in u-boot, the following configurations need to be enabled

CONFIG_DM_GPIO=y
CONFIG_ZYNQ_GPIO=y
CONFIG_CMD_GPIO=y

Test Procedure

Command Line:
It’s a simple way to access the GPIO from the command line.
Following commands need to run on the u-boot console:

gpio status -a
gpio input <gpio_num>
gpio set <gpio_num>
gpio clear <gpio_num>
gpio toggle <gpio_num>

78 GPIO signals for device pins
- Routed through the MIO multiplexer.
- Outputs are 3-state capable.
288 GPIO signals between the PS and PL through the EMIO interface
- 96 inputs.
- 192 outputs (96 true outputs and 96 output enables).
The function of each GPIO can be dynamically programmed on an individual or group basis.
Enable, bit or bank data write, output enable and direction controls.
Programmable interrupts on individual GPIO basis
- Status read of raw and masked interrupt.
- Selectable sensitivity: Level-sensitive (High or Low) or edge-sensitive (positive,negative, or both).

54 GPIO signals for device pins
- Routed through the MIO multiplexer.
- Outputs are 3-state capable.
192 GPIO signals between the PS and PL via the EMIO interface
- 64 Inputs
- 128 Outputs(64 true outputs and 64 output enables).
The function of each GPIO can be dynamically programmed on an individual or group basis.
Enable, bit or bank data write, output enable and direction controls.
Programmable interrupts on individual GPIO basis
- Status read of raw and masked interrupt.
- Selectable sensitivity: Level-sensitive (High or Low) or edge-sensitive (positive,negative, or both).