redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

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

Commit fd9c963c56 ("gpio: mb86s70: Return error if requesting an
already assigned gpio") adds code that infers from the state of the
GPIO Pin Function Register (PFR) whether a GPIO has been assigned
already. This assumes that the pin functions are set to 'peripheral'
when the driver is loaded, which is not guaranteed. Also, the GPIO
layer is perfectly capable of keeping track of which GPIOs have been
assigned already, so we shouldn't need this check in the first place.

This reverts commit fd9c963c56.

Cc: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
zero-colors
Ard Biesheuvel 2017-10-27 21:21:48 +01:00 committed by Linus Walleij
parent e1289dba18
commit eb32889928
1 changed files with 0 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpio/gpio-mb86s7x.c
View File

@ -53,11 +53,6 @@ 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));