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| author | John Crispin <blogic@openwrt.org> | 2013-01-19 08:54:26 +0000 |
|---|---|---|
| committer | John Crispin <blogic@openwrt.org> | 2013-02-17 00:15:17 +0100 |
| commit | bae696a267d81ea268f4de1e396b8c82154f22ed (patch) | |
| tree | a0d7b008010d7938c14039caefbac8df81e714bf /arch/mips/pci | |
| parent | d0c550dc36881fda171ec8ad3dcc67491ad968eb (diff) | |
| download | linux-stable-bae696a267d81ea268f4de1e396b8c82154f22ed.tar.gz linux-stable-bae696a267d81ea268f4de1e396b8c82154f22ed.tar.bz2 linux-stable-bae696a267d81ea268f4de1e396b8c82154f22ed.zip | |
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/
Diffstat (limited to 'arch/mips/pci')
| -rw-r--r-- | arch/mips/pci/pci-lantiq.c | 12 |
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); |