diff options
Diffstat (limited to 'arch/mips/pci/pci-alchemy.c')
| -rw-r--r-- | arch/mips/pci/pci-alchemy.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/arch/mips/pci/pci-alchemy.c b/arch/mips/pci/pci-alchemy.c index 563d1f61d6ee..c19600a03460 100644 --- a/arch/mips/pci/pci-alchemy.c +++ b/arch/mips/pci/pci-alchemy.c @@ -7,6 +7,7 @@ * Support for all devices (greater than 16) added by David Gathright. */ +#include <linux/clk.h> #include <linux/export.h> #include <linux/types.h> #include <linux/pci.h> @@ -364,6 +365,7 @@ static int alchemy_pci_probe(struct platform_device *pdev) void __iomem *virt_io; unsigned long val; struct resource *r; + struct clk *c; int ret; /* need at least PCI IRQ mapping table */ @@ -393,11 +395,24 @@ static int alchemy_pci_probe(struct platform_device *pdev) goto out1; } + c = clk_get(&pdev->dev, "pci_clko"); + if (IS_ERR(c)) { + dev_err(&pdev->dev, "unable to find PCI clock\n"); + ret = PTR_ERR(c); + goto out2; + } + + ret = clk_prepare_enable(c); + if (ret) { + dev_err(&pdev->dev, "cannot enable PCI clock\n"); + goto out6; + } + ctx->regs = ioremap_nocache(r->start, resource_size(r)); if (!ctx->regs) { dev_err(&pdev->dev, "cannot map pci regs\n"); ret = -ENODEV; - goto out2; + goto out5; } /* map parts of the PCI IO area */ @@ -465,12 +480,19 @@ static int alchemy_pci_probe(struct platform_device *pdev) register_syscore_ops(&alchemy_pci_pmops); register_pci_controller(&ctx->alchemy_pci_ctrl); + dev_info(&pdev->dev, "PCI controller at %ld MHz\n", + clk_get_rate(c) / 1000000); + return 0; out4: iounmap(virt_io); out3: iounmap(ctx->regs); +out5: + clk_disable_unprepare(c); +out6: + clk_put(c); out2: release_mem_region(r->start, resource_size(r)); out1: |