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PCI: aardvark: Use pci_is_root_bus() to check if bus is root bus 

Use pci_is_root_bus() rather than tracking the root bus number to
determine if the bus is the root bus or not. This removes storing
duplicated data as well as the need for the host bridge driver to have
to care about the bus numbers in most cases.

Link: https://lore.kernel.org/r/20200722022514.1283916-5-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Rob Herring 2020-07-21 20:24:59 -06:00 committed by Lorenzo Pieralisi
parent d3bb94d06a
commit 11e9797360
1 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/pci/controller/pci-aardvark.c
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@ -195,7 +195,6 @@ struct advk_pcie {
DECLARE_BITMAP(msi_used, MSI_IRQ_NUM);
struct mutex msi_used_lock;
u16 msi_msg;
int root_bus_nr;
int link_gen;
struct pci_bridge_emul bridge;
struct gpio_desc *reset_gpio;
@ -641,7 +640,7 @@ static void advk_sw_pci_bridge_init(struct advk_pcie *pcie)
static bool advk_pcie_valid_device(struct advk_pcie *pcie, struct pci_bus *bus,
int devfn)
{
if ((bus->number == pcie->root_bus_nr) && PCI_SLOT(devfn) != 0)
if (pci_is_root_bus(bus) && PCI_SLOT(devfn) != 0)
return false;
return true;
@ -659,7 +658,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
return PCIBIOS_DEVICE_NOT_FOUND;
}
if (bus->number == pcie->root_bus_nr)
if (pci_is_root_bus(bus))
return pci_bridge_emul_conf_read(&pcie->bridge, where,
size, val);
@ -670,7 +669,7 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn,
/* Program the control register */
reg = advk_readl(pcie, PIO_CTRL);
reg &= ~PIO_CTRL_TYPE_MASK;
if (bus->primary == pcie->root_bus_nr)
if (pci_is_root_bus(bus->parent))
reg |= PCIE_CONFIG_RD_TYPE0;
else
reg |= PCIE_CONFIG_RD_TYPE1;
@ -715,7 +714,7 @@ static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
if (!advk_pcie_valid_device(pcie, bus, devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
if (bus->number == pcie->root_bus_nr)
if (pci_is_root_bus(bus))
return pci_bridge_emul_conf_write(&pcie->bridge, where,
size, val);
@ -729,7 +728,7 @@ static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
/* Program the control register */
reg = advk_readl(pcie, PIO_CTRL);
reg &= ~PIO_CTRL_TYPE_MASK;
if (bus->primary == pcie->root_bus_nr)
if (pci_is_root_bus(bus->parent))
reg |= PCIE_CONFIG_WR_TYPE0;
else
reg |= PCIE_CONFIG_WR_TYPE1;
@ -1138,7 +1137,7 @@ static int advk_pcie_probe(struct platform_device *pdev)
dev_err(dev, "Failed to parse resources\n");
return ret;
}
pcie->root_bus_nr = bus->start;
bridge->busnr = bus->start;
pcie->reset_gpio = devm_gpiod_get_from_of_node(dev, dev->of_node,
"reset-gpios", 0,