As per the datasheet, manage the IO and value states to implement open-source/open-drain, but do this by falling back to gpiolib's emulation. This commit simply makes the behaviour explicit for clarity, rather than relying on the implicit return of -ENOTSUPP to trigger the emulation. Signed-off-by: Andrew Jeffery <andrew@xxxxxxxx> --- drivers/gpio/gpio-aspeed.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c index 3327a48df862..ccea609676ee 100644 --- a/drivers/gpio/gpio-aspeed.c +++ b/drivers/gpio/gpio-aspeed.c @@ -761,6 +761,10 @@ static int aspeed_gpio_set_config(struct gpio_chip *chip, unsigned int offset, param == PIN_CONFIG_BIAS_PULL_DOWN || param == PIN_CONFIG_DRIVE_STRENGTH) return pinctrl_gpio_set_config(offset, config); + else if (param == PIN_CONFIG_DRIVE_OPEN_DRAIN || + param == PIN_CONFIG_DRIVE_OPEN_SOURCE) + /* Return -ENOTSUPP to trigger emulation, as per datasheet */ + return -ENOTSUPP; return -ENOTSUPP; } -- 2.9.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
