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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>
hifive-unleashed-5.1
Ryder Lee 2017-08-10 14:34:57 +08:00 committed by Bjorn Helgaas
parent c681c93067
commit 1eacd7b84e
1 changed files with 10 additions and 7 deletions
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17
drivers/pci/host/pcie-mediatek.c
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@ -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");