gpio: gpio-mm-lantiq: Use of_property_read_u32

Instead of parsing manually the shadow content, use the much simpler
helper of_property_read_u32.

Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: John Crispin <blogic@openwrt.org>
Cc: devicetree@vger.kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/gpio/gpio-mm-lantiq.c b/drivers/gpio/gpio-mm-lantiq.c
index 7d551610244b..95ff180d261e 100644
--- a/drivers/gpio/gpio-mm-lantiq.c
+++ b/drivers/gpio/gpio-mm-lantiq.c
@@ -105,7 +105,7 @@ static void ltq_mm_save_regs(struct of_mm_gpio_chip *mm_gc)
 static int ltq_mm_probe(struct platform_device *pdev)
 {
         struct ltq_mm *chip;
-        const __be32 *shadow;
+        u32 shadow;
 
         chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
         if (!chip)
@@ -117,9 +117,8 @@ static int ltq_mm_probe(struct platform_device *pdev)
         chip->mmchip.save_regs = ltq_mm_save_regs;
 
         /* store the shadow value if one was passed by the devicetree */
-        shadow = of_get_property(pdev->dev.of_node, "lantiq,shadow", NULL);
-        if (shadow)
-                chip->shadow = be32_to_cpu(*shadow);
+        if (!of_property_read_u32(pdev->dev.of_node, "lantiq,shadow", &shadow))
+                chip->shadow = shadow;
 
         return of_mm_gpiochip_add(pdev->dev.of_node, &chip->mmchip);
 }