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| author | Ryder Lee <ryder.lee@mediatek.com> | 2017-08-10 09:34:57 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-08-30 16:23:57 +0300 |
| commit | 1eacd7b84e0413f55fbc0c61874f745cc5e2ed9e (patch) | |
| tree | 0ffa757d3ee524b5dd499b9e9a1061b28de1e323 /drivers/pci/host | |
| parent | c681c93067b8484381653dee0fc79a6d81be7050 (diff) | |
| download | linux-1eacd7b84e0413f55fbc0c61874f745cc5e2ed9e.tar.xz | |
PCI: mediatek: Switch to use platform_get_resource_byname()
This is a transitional patch. We currently use platfarm_get_resource() for
retrieving the IOMEM resources, but there might be some chips don't have
subsys/shared registers part, which depends on platform design, and these
will be introduced in further patches.
Switch this function to use the platform_get_resource_byname() so that the
binding can be agnostic of the resource order.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/host')
| -rw-r--r-- | drivers/pci/host/pcie-mediatek.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/pci/host/pcie-mediatek.c b/drivers/pci/host/pcie-mediatek.c index 01caa98d4171..c649ab4ab2c0 100644 --- a/drivers/pci/host/pcie-mediatek.c +++ b/drivers/pci/host/pcie-mediatek.c @@ -295,7 +295,8 @@ static int mtk_pcie_parse_port(struct mtk_pcie *pcie, return err; } - regs = platform_get_resource(pdev, IORESOURCE_MEM, slot + 1); + snprintf(name, sizeof(name), "port%d", slot); + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); port->base = devm_ioremap_resource(dev, regs); if (IS_ERR(port->base)) { dev_err(dev, "failed to map port%d base\n", slot); @@ -336,12 +337,14 @@ static int mtk_pcie_subsys_powerup(struct mtk_pcie *pcie) struct resource *regs; int err; - /* get shared registers */ - regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); - pcie->base = devm_ioremap_resource(dev, regs); - if (IS_ERR(pcie->base)) { - dev_err(dev, "failed to map shared register\n"); - return PTR_ERR(pcie->base); + /* get shared registers, which are optional */ + regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "subsys"); + if (regs) { + pcie->base = devm_ioremap_resource(dev, regs); + if (IS_ERR(pcie->base)) { + dev_err(dev, "failed to map shared register\n"); + return PTR_ERR(pcie->base); + } } pcie->free_ck = devm_clk_get(dev, "free_ck"); |