SPI Handshake GPIO error

[hmaiedEtic]

Checklist

• Checked the issue tracker for similar issues to ensure this is not a duplicate.
• Provided a clear description of your suggestion.
• Included any relevant context or examples.

Issue or Suggestion Description

Hello,

I compiled the esp_hosted driver for the AM62X-SK platform with Linux 6.4.16. I changed the HANDSHAKE_PIN and DATA_READY_PIN in the esp_spi.h file.

#define HANDSHAKE_PIN           38
#define SPI_IRQ                 gpio_to_irq(HANDSHAKE_PIN)
#define SPI_DATA_READY_PIN      39

However, when I attempt to load esp32_spi , I encounter the following error in the log:

[   52.341964] esp32_spi: spi_dev_init: ESP32 peripheral is registered to SPI bus [0], chip select [1], SPI Clock [10]
[   52.352383] esp32_spi: spi_dev_init: Failed to obtain GPIO for Handshake pin, err:-517

It seems like there is an issue with the GPIO handshake pin setup. The error code -517 is returned when the system attempts to initialize the SPI device, indicating a failure to obtain the GPIO for the handshake pin.

Here is the part of the device tree I edited to configure the GPIO pins.

       mygpio0_pins_default: mygpio0-default-pins {
               pinctrl-single,pins = <
                       AM62X_IOPAD(0x009c, PIN_INPUT, 7) /* (V25) GPMC0_WAIT1.GPIO0_38 */
                       AM62X_IOPAD(0x00a0, PIN_INPUT, 7) /* (K25) GPMC0_WPn.GPIO0_39 */
               >;
        };

&main_gpio0 {
        pinctrl-names = "default";
        pinctrl-0 = <&mygpio0_pins_default>;
};

Has anyone encountered a similar issue or can suggest potential solutions to resolve this error? Any guidance would be appreciated!