releases/5.4.291/gpio-bcm-kona-fix-gpio-lock-unlock-for-banks-above-b.patch

From e228ae7b3b0e2076312a7be89d00603e452f9473 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Thu, 6 Feb 2025 18:46:00 +0100
Subject: gpio: bcm-kona: Fix GPIO lock/unlock for banks above bank 0

From: Artur Weber <aweber.kernel@gmail.com>

[ 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@broadcom.com>
Reviewed-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Artur Weber <aweber.kernel@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250206-kona-gpio-fixes-v2-1-409135eab780@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpio/gpio-bcm-kona.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c
index 100575973e1fd..840a4b7e6c4d1 100644
--- a/drivers/gpio/gpio-bcm-kona.c
+++ b/drivers/gpio/gpio-bcm-kona.c
@@ -94,11 +94,12 @@ 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);
@@ -110,11 +111,12 @@ 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);
-- 
2.39.5