linux-kernel - [PATCH 4.13 013/109] pinctrl: samsung: Fix invalid register offset used for Exynos5433 external interrupts

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Message-Id: <20170924203353.632673504@linuxfoundation.org>
Date:   Sun, 24 Sep 2017 22:32:34 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Tomasz Figa <tomasz.figa@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>
Subject: [PATCH 4.13 013/109] pinctrl: samsung: Fix invalid register offset used for Exynos5433 external interrupts

4.13-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Krzysztof Kozlowski <krzk@...nel.org>

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@...il.com>
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
Tested-by: Sylwester Nawrocki <s.nawrocki@...sung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/pinctrl/samsung/pinctrl-exynos.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/pinctrl/samsung/pinctrl-exynos.c
+++ b/drivers/pinctrl/samsung/pinctrl-exynos.c
@@ -174,10 +174,10 @@ static int exynos_irq_request_resources(
 
 	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
 
 	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);