gpio: mxc: Use devm_clk_get_optional instead of devm_clk_get

i.MX SoC's GPIO clock is optional, so it is better to use
devm_clk_get_optional instead of devm_clk_get.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index b2813580c5825a08d7f05b45885b8798f44b17fa..7907a875586626d4592ca2d71ffedfd72131f684 100644 (file)
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -435,12 +435,9 @@ static int mxc_gpio_probe(struct platform_device *pdev)
                return port->irq;
 
        /* the controller clock is optional */
-       port->clk = devm_clk_get(&pdev->dev, NULL);
-       if (IS_ERR(port->clk)) {
-               if (PTR_ERR(port->clk) == -EPROBE_DEFER)
-                       return -EPROBE_DEFER;
-               port->clk = NULL;
-       }
+       port->clk = devm_clk_get_optional(&pdev->dev, NULL);
+       if (IS_ERR(port->clk))
+               return PTR_ERR(port->clk);
 
        err = clk_prepare_enable(port->clk);
        if (err) {