The IMX6 PCIe host controller does not have a proper reset and as such there are several issues that can arise if PCI is enabled in the bootloader follwed by Linux trying to re-configure LTSSM and/or toggling PERST# to the devices.
For now, the best approach seems to default to disabling PCI by defaulting pciedisable=1. This can be overridden by the user if they need PCI in the bootloader, for example: - GW552x needing ethernet access in bootloader - GW16082 expansion board needing a device-tree fixup for irq mapping
Signed-off-by: Tim Harvey tharvey@gateworks.com --- include/configs/gw_ventana.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/configs/gw_ventana.h b/include/configs/gw_ventana.h index 982ddba..4acfca6 100644 --- a/include/configs/gw_ventana.h +++ b/include/configs/gw_ventana.h @@ -274,6 +274,7 @@ "dio0:mode=gpio;dio1:mode=gpio;dio2:mode=gpio;dio3:mode=gpio\0" \
#define CONFIG_EXTRA_ENV_SETTINGS_COMMON \ + "pcidisable=1\0" \ "usb_pgood_delay=2000\0" \ "console=ttymxc1\0" \ "bootdevs=usb mmc sata flash\0" \