openwrtv4/target/linux/lantiq/patches-3.8/0018-MIPS-lantiq-improve-pci-reset-gpio-handling.patch
Gabor Juhos 07532dca7f kernel: update linux 3.8 to 3.8.3
Also refresh the related generic/platform patches.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 36039
2013-03-15 14:39:51 +00:00

35 lines
1.2 KiB
Diff

From b6684dd3036513e4f91986fe982356512458f711 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Sat, 19 Jan 2013 08:54:26 +0000
Subject: [PATCH 18/40] 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/
---
arch/mips/pci/pci-lantiq.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- a/arch/mips/pci/pci-lantiq.c
+++ b/arch/mips/pci/pci-lantiq.c
@@ -129,8 +129,16 @@ static int ltq_pci_startup(struct platfo
/* 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);