This is a note to let you know that I've just added the patch titled
gpio: bcm-kona: Fix GPIO lock/unlock for banks above bank 0
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:
gpio-bcm-kona-fix-gpio-lock-unlock-for-banks-above-b.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.
commit 475153a39743172d7c0afb4f41e14a394c8fb42b
Author: Artur Weber <aweber.kernel@xxxxxxxxx>
Date: Thu Feb 6 18:46:00 2025 +0100
gpio: bcm-kona: Fix GPIO lock/unlock for banks above bank 0
[ Upstream commit de1d0d160f64ee76df1d364d521b2faf465a091c ]
The GPIO lock/unlock functions clear/write a bit to the relevant
register for each bank. However, due to an oversight the bit that
was being written was based on the total GPIO number, not the index
of the GPIO within the relevant bank, causing it to fail for any
GPIO above 32 (thus any GPIO for banks above bank 0).
Fix lock/unlock for these banks by using the correct bit.
Fixes: bdb93c03c550 ("gpio: bcm281xx: Centralize register locking")
Reviewed-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
Reviewed-by: Markus Mayer <mmayer@xxxxxxxxxxxx>
Signed-off-by: Artur Weber <aweber.kernel@xxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20250206-kona-gpio-fixes-v2-1-409135eab780@xxxxxxxxx
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c
index d329a143f5ec9..c83968384904e 100644
--- a/drivers/gpio/gpio-bcm-kona.c
+++ b/drivers/gpio/gpio-bcm-kona.c
@@ -93,11 +93,12 @@ static void bcm_kona_gpio_lock_gpio(struct bcm_kona_gpio *kona_gpio,
u32 val;
unsigned long flags;
int bank_id = GPIO_BANK(gpio);
+ int bit = GPIO_BIT(gpio);
raw_spin_lock_irqsave(&kona_gpio->lock, flags);
val = readl(kona_gpio->reg_base + GPIO_PWD_STATUS(bank_id));
- val |= BIT(gpio);
+ val |= BIT(bit);
bcm_kona_gpio_write_lock_regs(kona_gpio->reg_base, bank_id, val);
raw_spin_unlock_irqrestore(&kona_gpio->lock, flags);
@@ -109,11 +110,12 @@ static void bcm_kona_gpio_unlock_gpio(struct bcm_kona_gpio *kona_gpio,
u32 val;
unsigned long flags;
int bank_id = GPIO_BANK(gpio);
+ int bit = GPIO_BIT(gpio);
raw_spin_lock_irqsave(&kona_gpio->lock, flags);
val = readl(kona_gpio->reg_base + GPIO_PWD_STATUS(bank_id));
- val &= ~BIT(gpio);
+ val &= ~BIT(bit);
bcm_kona_gpio_write_lock_regs(kona_gpio->reg_base, bank_id, val);
raw_spin_unlock_irqrestore(&kona_gpio->lock, flags);
