Commit fd9c963c authored by Axel Lin's avatar Axel Lin Committed by Linus Walleij

gpio: mb86s70: Return error if requesting an already assigned gpio

Signed-off-by: default avatarAxel Lin <>
Signed-off-by: default avatarLinus Walleij <>
parent c517d838
......@@ -58,6 +58,11 @@ static int mb86s70_gpio_request(struct gpio_chip *gc, unsigned gpio)
spin_lock_irqsave(&gchip->lock, flags);
val = readl(gchip->base + PFR(gpio));
if (!(val & OFFSET(gpio))) {
spin_unlock_irqrestore(&gchip->lock, flags);
return -EINVAL;
val &= ~OFFSET(gpio);
writel(val, gchip->base + PFR(gpio));
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