pinctrl: samsung: Fix invalid register offset used for Exynos5433 external interrupts

commit af0b0baa89953aed07034725023371b2fa50a1e6 upstream.

When setting the pin function for external interrupts, the driver used
wrong IO memory address base.  The pin function register is always under
pctl_base, not the eint_base.

By updating wrong register, the external interrupts for chosen GPIO
would not work at all and some other GPIO might be configured to wrong
value.  For example on Exynos5433-based boards, the external interrupts
for gpf{1-5}-X GPIOs should not work at all (driver toggled reserved
registers from ALIVE bank instead).

Platforms other than Exynos5433 should not be affected as eint_base
equals pctl_base in such case.

Fixes: 8b1bd11c1f8f ("pinctrl: samsung: Add the support the multiple IORESOURCE_MEM for one pin-bank")
Reported-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/pinctrl/samsung/pinctrl-exynos.c b/drivers/pinctrl/samsung/pinctrl-exynos.c
index 731530a9ce38b0c6c5e6d40ff888e4cbdde75153..9ab8faf528a6c07018e5fba267a84e9b7c8eb8d4 100644 (file)
--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -174,10 +174,10 @@ static int exynos_irq_request_resources(struct irq_data *irqd)
 
        spin_lock_irqsave(&bank->slock, flags);
 
-       con = readl(bank->eint_base + reg_con);
+       con = readl(bank->pctl_base + reg_con);
        con &= ~(mask << shift);
        con |= EXYNOS_EINT_FUNC << shift;
-       writel(con, bank->eint_base + reg_con);
+       writel(con, bank->pctl_base + reg_con);
 
        spin_unlock_irqrestore(&bank->slock, flags);
 
@@ -202,10 +202,10 @@ static void exynos_irq_release_resources(struct irq_data *irqd)
 
        spin_lock_irqsave(&bank->slock, flags);
 
-       con = readl(bank->eint_base + reg_con);
+       con = readl(bank->pctl_base + reg_con);
        con &= ~(mask << shift);
        con |= FUNC_INPUT << shift;
-       writel(con, bank->eint_base + reg_con);
+       writel(con, bank->pctl_base + reg_con);
 
        spin_unlock_irqrestore(&bank->slock, flags);