This is a note to let you know that I've just added the patch titled
pinctrl: stm32: consider the GPIO offset to expose all the GPIO lines
to the 5.15-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-stm32-consider-the-gpio-offset-to-expose-all-the-gpio-lines.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b67210cc217f9ca1c576909454d846970c13dfd4 Mon Sep 17 00:00:00 2001
From: Fabien Dessenne <fabien.dessenne@xxxxxxxxxxx>
Date: Wed, 15 Dec 2021 10:58:08 +0100
Subject: pinctrl: stm32: consider the GPIO offset to expose all the GPIO lines
From: Fabien Dessenne <fabien.dessenne@xxxxxxxxxxx>
commit b67210cc217f9ca1c576909454d846970c13dfd4 upstream.
Consider the GPIO controller offset (from "gpio-ranges") to compute the
maximum GPIO line number.
This fixes an issue where gpio-ranges uses a non-null offset.
e.g.: gpio-ranges = <&pinctrl 6 86 10>
In that case the last valid GPIO line is not 9 but 15 (6 + 10 - 1)
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 67e2996f72c7 ("pinctrl: stm32: fix the reported number of GPIO lines per bank")
Reported-by: Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx>
Signed-off-by: Fabien Dessenne <fabien.dessenne@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211215095808.621716-1-fabien.dessenne@xxxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pinctrl/stm32/pinctrl-stm32.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -1251,10 +1251,10 @@ static int stm32_gpiolib_register_bank(s
bank_nr = args.args[1] / STM32_GPIO_PINS_PER_BANK;
bank->gpio_chip.base = args.args[1];
- npins = args.args[2];
- while (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3,
- ++i, &args))
- npins += args.args[2];
+ /* get the last defined gpio line (offset + nb of pins) */
+ npins = args.args[0] + args.args[2];
+ while (!of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, ++i, &args))
+ npins = max(npins, (int)(args.args[0] + args.args[2]));
} else {
bank_nr = pctl->nbanks;
bank->gpio_chip.base = bank_nr * STM32_GPIO_PINS_PER_BANK;
Patches currently in stable-queue which might be from fabien.dessenne@xxxxxxxxxxx are
queue-5.15/pinctrl-stm32-consider-the-gpio-offset-to-expose-all-the-gpio-lines.patch
