This is a note to let you know that I've just added the patch titled
pinctrl: at91: make it work with current gpiolib
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pinctrl-at91-make-it-work-with-current-gpiolib.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 0ab6e75966cb53e3d8d527ad607c22312a8c49d0
Author: Thomas Blocher <thomas.blocher@xxxxxxxxx>
Date: Wed Jul 31 01:16:26 2024 +0200
pinctrl: at91: make it work with current gpiolib
[ Upstream commit 752f387faaae0ae2e84d3f496922524785e77d60 ]
pinctrl-at91 currently does not support the gpio-groups devicetree
property and has no pin-range.
Because of this at91 gpios stopped working since patch
commit 2ab73c6d8323fa1e ("gpio: Support GPIO controllers without pin-ranges")
This was discussed in the patches
commit fc328a7d1fcce263 ("gpio: Revert regression in sysfs-gpio (gpiolib.c)")
commit 56e337f2cf132632 ("Revert "gpio: Revert regression in sysfs-gpio (gpiolib.c)"")
As a workaround manually set pin-range via gpiochip_add_pin_range() until
a) pinctrl-at91 is reworked to support devicetree gpio-groups
b) another solution as mentioned in
commit 56e337f2cf132632 ("Revert "gpio: Revert regression in sysfs-gpio (gpiolib.c)"")
is found
Signed-off-by: Thomas Blocher <thomas.blocher@xxxxxxxxx>
Link: https://lore.kernel.org/5b992862-355d-f0de-cd3d-ff99e67a4ff1@xxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index ad01cc5798232..48374945b2d7b 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1290,8 +1290,11 @@ static int at91_pinctrl_probe(struct platform_device *pdev)
/* We will handle a range of GPIO pins */
for (i = 0; i < gpio_banks; i++)
- if (gpio_chips[i])
+ if (gpio_chips[i]) {
pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
+ gpiochip_add_pin_range(&gpio_chips[i]->chip, dev_name(info->pctl->dev), 0,
+ gpio_chips[i]->range.pin_base, gpio_chips[i]->range.npins);
+ }
dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n");
