Probing LPC can cause PCI enumeration to take place, which significantly increases pre-relocation memory usage. Also, LPC is somtimes enabled directly by SPL.
Adjust the logic to probe the LPC only after relocation. This allows chromebook_link64 to start up without a much larger CONFIG_SYS_MALLOC_F_LEN value.
Signed-off-by: Simon Glass sjg@chromium.org ---
Changes in v2: - Add new patch to set up LPC only after relocation
drivers/sysreset/sysreset_x86.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/sysreset/sysreset_x86.c b/drivers/sysreset/sysreset_x86.c index 8042f3994fe2..4936fdb76c72 100644 --- a/drivers/sysreset/sysreset_x86.c +++ b/drivers/sysreset/sysreset_x86.c @@ -129,8 +129,13 @@ static int x86_sysreset_probe(struct udevice *dev) { struct x86_sysreset_plat *plat = dev_get_plat(dev);
- /* Locate the PCH if there is one. It isn't essential */ - uclass_first_device(UCLASS_PCH, &plat->pch); + /* + * Locate the PCH if there is one. It isn't essential. Avoid this before + * relocation as we shouldn't need reset then and it needs a lot of + * memory for PCI enumeration. + */ + if (gd->flags & GD_FLG_RELOC) + uclass_first_device(UCLASS_PCH, &plat->pch);
return 0; }