MIPS: lantiq: improve pci reset gpio handling

We need to make sure that the reset gpio is available and also set a sane
default state.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4817/

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/mips/pci/pci-lantiq.c b/arch/mips/pci/pci-lantiq.c
index 95681789b51e..f32664bbbe17 100644
--- a/arch/mips/pci/pci-lantiq.c
+++ b/arch/mips/pci/pci-lantiq.c
@@ -129,8 +129,16 @@ static int ltq_pci_startup(struct platform_device *pdev)
 
         /* setup reset gpio used by pci */
         reset_gpio = of_get_named_gpio(node, "gpio-reset", 0);
-        if (gpio_is_valid(reset_gpio))
-                devm_gpio_request(&pdev->dev, reset_gpio, "pci-reset");
+        if (gpio_is_valid(reset_gpio)) {
+                int ret = devm_gpio_request(&pdev->dev,
+                                                reset_gpio, "pci-reset");
+                if (ret) {
+                        dev_err(&pdev->dev,
+                                "failed to request gpio %d\n", reset_gpio);
+                        return ret;
+                }
+                gpio_direction_output(reset_gpio, 1);
+        }
 
         /* enable auto-switching between PCI and EBU */
         ltq_pci_w32(0xa, PCI_CR_CLK_CTRL);