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PCI: altera: Use pci_parse_request_of_pci_ranges()

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Convert altera host bridge to use the common
pci_parse_request_of_pci_ranges().

There's no need to assign the resources to a temporary list first. Just
use bridge->windows directly and remove all the temporary list handling.

If an I/O range is present, then it will now be mapped. It's expected
that h/w which doesn't support I/O range will not define one.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: rfi@lists.rocketboards.org
This commit is contained in:
Rob Herring 2019-10-28 11:32:35 -05:00 committed by Lorenzo Pieralisi
parent 4e5be6f81b
commit e634e3e0b7
1 changed files with 2 additions and 39 deletions
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41
drivers/pci/controller/pcie-altera.c
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@ -92,7 +92,6 @@ struct altera_pcie {
u8 root_bus_nr;
struct irq_domain *irq_domain;
struct resource bus_range;
struct list_head resources;
const struct altera_pcie_data *pcie_data;
};
@ -670,39 +669,6 @@ static void altera_pcie_isr(struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
static int altera_pcie_parse_request_of_pci_ranges(struct altera_pcie *pcie)
{
int err, res_valid = 0;
struct device *dev = &pcie->pdev->dev;
struct resource_entry *win;
err = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
&pcie->resources, NULL);
if (err)
return err;
err = devm_request_pci_bus_resources(dev, &pcie->resources);
if (err)
goto out_release_res;
resource_list_for_each_entry(win, &pcie->resources) {
struct resource *res = win->res;
if (resource_type(res) == IORESOURCE_MEM)
res_valid |= !(res->flags & IORESOURCE_PREFETCH);
}
if (res_valid)
return 0;
dev_err(dev, "non-prefetchable memory resource required\n");
err = -EINVAL;
out_release_res:
pci_free_resource_list(&pcie->resources);
return err;
}
static int altera_pcie_init_irq_domain(struct altera_pcie *pcie)
{
struct device *dev = &pcie->pdev->dev;
@ -833,9 +799,8 @@ static int altera_pcie_probe(struct platform_device *pdev)
return ret;
}
INIT_LIST_HEAD(&pcie->resources);
ret = altera_pcie_parse_request_of_pci_ranges(pcie);
ret = pci_parse_request_of_pci_ranges(dev, &bridge->windows,
NULL);
if (ret) {
dev_err(dev, "Failed add resources\n");
return ret;
@ -853,7 +818,6 @@ static int altera_pcie_probe(struct platform_device *pdev)
cra_writel(pcie, P2A_INT_ENA_ALL, P2A_INT_ENABLE);
altera_pcie_host_init(pcie);
list_splice_init(&pcie->resources, &bridge->windows);
bridge->dev.parent = dev;
bridge->sysdata = pcie;
bridge->busnr = pcie->root_bus_nr;
@ -884,7 +848,6 @@ static int altera_pcie_remove(struct platform_device *pdev)
pci_stop_root_bus(bridge->bus);
pci_remove_root_bus(bridge->bus);
pci_free_resource_list(&pcie->resources);
altera_pcie_irq_teardown(pcie);
return 0;