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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/
This commit is contained in:
John Crispin 2013-01-19 08:54:26 +00:00
parent d0c550dc36
commit bae696a267
1 changed files with 10 additions and 2 deletions
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12
arch/mips/pci/pci-lantiq.c
View File

@ -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);