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pinctrl: at91: make it work with current gpiolib

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[ 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 2ab73c6d83 ("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@ek-dev.de>
Link: https://lore.kernel.org/5b992862-355d-f0de-cd3d-ff99e67a4ff1@ek-dev.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thomas Blocher 2024-07-31 01:16:26 +02:00 committed by Greg Kroah-Hartman
parent 9f08d024ed
commit 2e5052143c
1 changed files with 4 additions and 1 deletions
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5
drivers/pinctrl/pinctrl-at91.c
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@ -1401,8 +1401,11 @@ 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");