On 18/06/2024 10:15, Hironori KIKUCHI wrote:
> The ST7701 supports not only MIPI DSI, but also SPI as an interface
> for configuration. To support a panel connected via RGB parallel
> interface, add support for SPI using MIPI DBI helpers.
>
> Signed-off-by: Hironori KIKUCHI <kikuchan98@xxxxxxxxx>
...
> +
> +static int st7701_spi_probe(struct spi_device *spi)
> +{
> + struct st7701 *st7701;
> + struct gpio_desc *dc;
> + int err;
> +
> + err = st7701_probe(&spi->dev, DRM_MODE_CONNECTOR_DPI);
> + if (err)
> + return err;
> +
> + st7701 = dev_get_drvdata(&spi->dev);
> + st7701->write_command = st7701_dbi_write;
> +
> + dc = devm_gpiod_get_optional(&spi->dev, "dc", GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
Nope, you cannot use GPIOD_FLAGS_BIT_NONEXCLUSIVE outside of regulators.
I don't see any code for ensuring proper simultaneus access.
Best regards,
Krzysztof
