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PCI: designware: Look for configuration space in 'reg', not 'ranges' 

The configuration address space has so far been specified in *ranges*,
however it should be specified in *reg* making it a platform MEM resource.
Hence used 'platform_get_resource_*' API to get configuration address space
in the designware driver.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Mohit Kumar <mohit.kumar@st.com>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Cc: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Kishon Vijay Abraham I 2014-07-17 14:30:40 +05:30 committed by Bjorn Helgaas
parent 7171511eae
commit 4dd964df36
2 changed files with 19 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/pci/designware-pcie.txt
View File

@ -2,6 +2,10 @@
Required properties:
- compatible: should contain "snps,dw-pcie" to identify the core.
- reg: Should contain the configuration address space.
- reg-names: Must be "config" for the PCIe configuration space.
(The old way of getting the configuration address space from "ranges"
is deprecated and should be avoided.)
- #address-cells: set to <3>
- #size-cells: set to <2>
- device_type: set to "pci"

17
drivers/pci/host/pcie-designware.c
View File

@ -20,6 +20,7 @@
#include <linux/of_pci.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include "pcie-designware.h"
@ -396,11 +397,23 @@ static const struct irq_domain_ops msi_domain_ops = {
int __init dw_pcie_host_init(struct pcie_port *pp)
{
struct device_node *np = pp->dev->of_node;
struct platform_device *pdev = to_platform_device(pp->dev);
struct of_pci_range range;
struct of_pci_range_parser parser;
struct resource *cfg_res;
u32 val;
int i;
cfg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
if (cfg_res) {
pp->config.cfg0_size = resource_size(cfg_res)/2;
pp->config.cfg1_size = resource_size(cfg_res)/2;
pp->cfg0_base = cfg_res->start;
pp->cfg1_base = cfg_res->start + pp->config.cfg0_size;
} else {
dev_err(pp->dev, "missing *config* reg space\n");
}
if (of_pci_range_parser_init(&parser, np)) {
dev_err(pp->dev, "missing ranges property\n");
return -EINVAL;
@ -433,6 +446,8 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
of_pci_range_to_resource(&range, np, &pp->cfg);
pp->config.cfg0_size = resource_size(&pp->cfg)/2;
pp->config.cfg1_size = resource_size(&pp->cfg)/2;
pp->cfg0_base = pp->cfg.start;
pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size;
}
}
@ -445,8 +460,6 @@ int __init dw_pcie_host_init(struct pcie_port *pp)
}
}
pp->cfg0_base = pp->cfg.start;
pp->cfg1_base = pp->cfg.start + pp->config.cfg0_size;
pp->mem_base = pp->mem.start;
pp->va_cfg0_base = devm_ioremap(pp->dev, pp->cfg0_base,