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| author | Simon Glass <sjg@chromium.org> | 2019-12-06 21:41:37 -0700 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2019-12-15 08:52:29 +0800 |
| commit | 2206ac248a550a4e796cd246ce57300fe7995d91 (patch) | |
| tree | ba6cafc679517bc39897da03342deca45cb91071 /drivers/pci | |
| parent | b14c53398683952723540f82027fb0cbfba4f7de (diff) | |
| download | u-boot-2206ac248a550a4e796cd246ce57300fe7995d91.zip u-boot-2206ac248a550a4e796cd246ce57300fe7995d91.tar.gz u-boot-2206ac248a550a4e796cd246ce57300fe7995d91.tar.bz2 | |
dm: pci: Allow delaying auto-config until after relocation
At present PCI auto-configuration happens in U-Boot both before and after
relocation. This is a waste of time and may mess up static addresses used
in board_init_f(). Adjust the code to supporting doing auto-configuration
once, after relocation, under control of a device-tree property.
This is needed for Apollo Lake for debugging the silicon-init code. Once
the UART is moved to a different MMIO address the debug UART does not work
and any debug output in Apollo Lake's arch_fsp_init_r() causes a hang.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/pci-uclass.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/pci/pci-uclass.c b/drivers/pci/pci-uclass.c index fab20fc..8e13adb 100644 --- a/drivers/pci/pci-uclass.c +++ b/drivers/pci/pci-uclass.c @@ -975,12 +975,15 @@ static int pci_uclass_pre_probe(struct udevice *bus) hose->bus = bus; hose->first_busno = bus->seq; hose->last_busno = bus->seq; + hose->skip_auto_config_until_reloc = + dev_read_bool(bus, "u-boot,skip-auto-config-until-reloc"); return 0; } static int pci_uclass_post_probe(struct udevice *bus) { + struct pci_controller *hose = dev_get_uclass_priv(bus); int ret; debug("%s: probing bus %d\n", __func__, bus->seq); @@ -988,11 +991,13 @@ static int pci_uclass_post_probe(struct udevice *bus) if (ret) return ret; -#if CONFIG_IS_ENABLED(PCI_PNP) - ret = pci_auto_config_devices(bus); - if (ret < 0) - return ret; -#endif + if (CONFIG_IS_ENABLED(PCI_PNP) && + (!hose->skip_auto_config_until_reloc || + (gd->flags & GD_FLG_RELOC))) { + ret = pci_auto_config_devices(bus); + if (ret < 0) + return log_msg_ret("pci auto-config", ret); + } #if defined(CONFIG_X86) && defined(CONFIG_HAVE_FSP) /* |