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36 lines
1.2 KiB
Diff
36 lines
1.2 KiB
Diff
From b6684dd3036513e4f91986fe982356512458f711 Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Sat, 19 Jan 2013 08:54:26 +0000
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Subject: [PATCH 18/40] MIPS: lantiq: improve pci reset gpio handling
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We need to make sure that the reset gpio is available and also set a sane
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default state.
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Signed-off-by: John Crispin <blogic@openwrt.org>
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Patchwork: http://patchwork.linux-mips.org/patch/4817/
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---
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arch/mips/pci/pci-lantiq.c | 12 ++++++++++--
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1 file changed, 10 insertions(+), 2 deletions(-)
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--- a/arch/mips/pci/pci-lantiq.c
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+++ b/arch/mips/pci/pci-lantiq.c
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@@ -129,8 +129,16 @@ static int ltq_pci_startup(struct platfo
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/* setup reset gpio used by pci */
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reset_gpio = of_get_named_gpio(node, "gpio-reset", 0);
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- if (gpio_is_valid(reset_gpio))
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- devm_gpio_request(&pdev->dev, reset_gpio, "pci-reset");
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+ if (gpio_is_valid(reset_gpio)) {
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+ int ret = devm_gpio_request(&pdev->dev,
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+ reset_gpio, "pci-reset");
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+ if (ret) {
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+ dev_err(&pdev->dev,
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+ "failed to request gpio %d\n", reset_gpio);
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+ return ret;
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+ }
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+ gpio_direction_output(reset_gpio, 1);
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+ }
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/* enable auto-switching between PCI and EBU */
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ltq_pci_w32(0xa, PCI_CR_CLK_CTRL);
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