gpio: mvebu: Add clk support to prevent lockup

[karo-tx-linux.git] / drivers / gpio / gpio-mvebu.c

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 7472182967ce15b44d964d184038fbca247724e8..61a6fde6c089b28a76f3ca5012309c101ebcf2b2 100644 (file)
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -42,6 +42,7 @@
 #include <linux/io.h>
 #include <linux/of_irq.h>
 #include <linux/of_device.h>
+#include <linux/clk.h>
 #include <linux/pinctrl/consumer.h>
 
 /*
@@ -496,6 +497,7 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
        struct resource *res;
        struct irq_chip_generic *gc;
        struct irq_chip_type *ct;
+       struct clk *clk;
        unsigned int ngpios;
        int soc_variant;
        int i, cpu, id;
@@ -529,6 +531,11 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
                return id;
        }
 
+       clk = devm_clk_get(&pdev->dev, NULL);
+       /* Not all SoCs require a clock.*/
+       if (!IS_ERR(clk))
+               clk_prepare_enable(clk);
+
        mvchip->soc_variant = soc_variant;
        mvchip->chip.label = dev_name(&pdev->dev);
        mvchip->chip.dev = &pdev->dev;