Hello there, not sure how it works with patches in OpenWRT, so I try all channels… I noticed that unexporting GPIOs is broken on ramips (gpio-ralink.c). There is a trac issue with some more details, and I already added the patch there:
https://dev.openwrt.org/ticket/14309 Here it is again for your convenvience: --- a/drivers/gpio/gpio-ralink.c 2014-09-23 11:06:10.044595879 +0200 +++ b/drivers/gpio/gpio-ralink.c 2014-09-23 11:11:14.063674520 +0200 @@ -258,6 +258,14 @@ return pinctrl_request_gpio(gpio); } +static void ralink_gpio_free(struct gpio_chip *chip, unsigned offset) +{ + int gpio = chip->base + offset; + + pinctrl_free_gpio(gpio); +} + + static int ralink_gpio_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -310,6 +318,7 @@ rg->chip.get = ralink_gpio_get; rg->chip.set = ralink_gpio_set; rg->chip.request = ralink_gpio_request; + rg->chip.free = ralink_gpio_free; rg->chip.to_irq = ralink_gpio_to_irq; /* set polarity to low for all lines */ Obviously, it needs to be applied after te patch that creates gpio-ralink.c in the first place. MfG Sebastian
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