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Commit 1eacd7b8 authored by Ryder Lee's avatar Ryder Lee Committed by Bjorn Helgaas
Browse files

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: default avatarRyder Lee <ryder.lee@mediatek.com>
Signed-off-by: default avatarHonghui Zhang <honghui.zhang@mediatek.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent c681c930

drivers/pci/host/pcie-mediatek.c

+10 −7
Original line number Diff line number Diff line
@@ -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);
@@ -336,13 +337,15 @@ 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);

	/* 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");

	if (IS_ERR(pcie->free_ck)) {