On Sat, Dec 7, 2019 at 12:46 PM Simon Glass sjg@chromium.org wrote:
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
Changes in v6: None Changes in v5: None Changes in v4:
- Change the behaviour to be a device-tree option
- apollolake -> Apollo Lake
Changes in v3: None Changes in v2: None
doc/device-tree-bindings/pci/x86-pci.txt | 24 ++++++++++++++++++++++++ drivers/pci/pci-uclass.c | 15 ++++++++++----- include/pci.h | 9 ++++++++- 3 files changed, 42 insertions(+), 6 deletions(-) create mode 100644 doc/device-tree-bindings/pci/x86-pci.txt
applied to u-boot-x86/next, thanks!