diff options
| author | Stefan Roese <sr@denx.de> | 2019-01-25 11:52:42 +0100 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2019-02-05 14:22:24 +0100 |
| commit | b52142004fbdfd6db0091ba7ae33c91e3b459034 (patch) | |
| tree | 82a451e32969f8ee4d49448b82f751ecdb816f41 | |
| parent | e5fd39c886485e3dec77f4438a6e364c2987cf5f (diff) | |
| download | u-boot-b52142004fbdfd6db0091ba7ae33c91e3b459034.tar.gz | |
pci: Add pci_get_devfn() to extract devfn from the fdt_pci_addr
This function will be used by the Marvell Armada XP/38x PCIe driver,
which is moved to DM right now. So let's extract the functionality
from pci_uclass_child_post_bind() to make it available.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
| -rw-r--r-- | drivers/pci/pci-uclass.c | 28 | ||||
| -rw-r--r-- | include/pci.h | 10 |
2 files changed, 29 insertions, 9 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index 2cf55cb743..47f3cc9107 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -1007,10 +1007,25 @@ static int pci_uclass_post_probe(struct udevice *bus) return 0; } +int pci_get_devfn(struct udevice *dev) +{ + struct fdt_pci_addr addr; + int ret; + + /* Extract the devfn from fdt_pci_addr */ + ret = ofnode_read_pci_addr(dev_ofnode(dev), FDT_PCI_SPACE_CONFIG, + "reg", &addr); + if (ret) { + if (ret != -ENOENT) + return -EINVAL; + } + + return addr.phys_hi & 0xff00; +} + static int pci_uclass_child_post_bind(struct udevice *dev) { struct pci_child_platdata *pplat; - struct fdt_pci_addr addr; int ret; if (!dev_of_valid(dev)) @@ -1022,14 +1037,9 @@ static int pci_uclass_child_post_bind(struct udevice *dev) ofnode_read_pci_vendev(dev_ofnode(dev), &pplat->vendor, &pplat->device); /* Extract the devfn from fdt_pci_addr */ - ret = ofnode_read_pci_addr(dev_ofnode(dev), FDT_PCI_SPACE_CONFIG, "reg", - &addr); - if (ret) { - if (ret != -ENOENT) - return -EINVAL; - } else { - pplat->devfn = addr.phys_hi & 0xff00; - } + pplat->devfn = pci_get_devfn(dev); + if (ret < 0) + return ret; return 0; } diff --git a/include/pci.h b/include/pci.h index 785d7d28b7..041f8e3747 100644 --- a/include/pci.h +++ b/include/pci.h @@ -1560,6 +1560,16 @@ struct dm_pci_emul_ops { int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn, struct udevice **containerp, struct udevice **emulp); +/** + * pci_get_devfn() - Extract the devfn from fdt_pci_addr of the device + * + * Get devfn from fdt_pci_addr of the specifified device + * + * @dev: PCI device + * @return devfn in bits 15...8 if found, -ENODEV if not found + */ +int pci_get_devfn(struct udevice *dev); + #endif /* CONFIG_DM_PCI */ /** |