diff options
| author | Simon Glass <sjg@chromium.org> | 2019-12-06 21:41:38 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-12-15 08:52:29 +0800 |
| commit | 6dd4b014329dc1f3e3e9a3c7c9055b1e0c4da3c3 (patch) | |
| tree | 854ceaa24271b5b6d4f5861feb3d56d43a3997c5 /drivers/core | |
| parent | 2206ac248a550a4e796cd246ce57300fe7995d91 (diff) | |
dm: pci: Move pci_get_devfn() into a common file
Early in boot it is necessary to decode the PCI device/function values for
particular peripherals in the device tree or of-platdata. This is needed
in TPL where CONFIG_PCI is not defined.
To handle this, move pci_get_devfn() into a file that is built even when
CONFIG_PCI is not defined.
Also add a function for use by of-platdata, to convert a reg property to
a pci_dev_t.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/core')
| -rw-r--r-- | drivers/core/util.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/core/util.c b/drivers/core/util.c index 7dc1a2af02..69f83755f0 100644 --- a/drivers/core/util.c +++ b/drivers/core/util.c @@ -4,7 +4,9 @@ */ #include <common.h> +#include <dm/device.h> #include <dm/ofnode.h> +#include <dm/read.h> #include <dm/util.h> #include <linux/libfdt.h> #include <vsprintf.h> @@ -58,3 +60,21 @@ bool dm_ofnode_pre_reloc(ofnode node) #endif } #endif + +#if !CONFIG_IS_ENABLED(OF_PLATDATA) +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; +} +#endif |