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Diffstat (limited to 'payloads/libpayload/Config.in')
| -rw-r--r-- | payloads/libpayload/Config.in | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/payloads/libpayload/Config.in b/payloads/libpayload/Config.in index a1343f566b..fbb477ed7f 100644 --- a/payloads/libpayload/Config.in +++ b/payloads/libpayload/Config.in @@ -72,6 +72,22 @@ config NVRAM bool "Support for reading/writing NVRAM bytes" default y +config RTC_PORT_EXTENDED_VIA + bool "Extended RTC ports are 0x74/0x75" + default n + help + For recent chipsets with 256 NVRAM bytes, you have to access the + upper 128 bytes (128-255) using two different I/O ports, + usually 0x72/0x73. + + On some chipsets this can be a different set of ports, though. + The VIA VT8237R for example only recognizes the ports 0x74/0x75 + for accessing the high 128 NVRAM bytes (as seems to be the case for + multiple VIA chipsets). + + If you want to read or write CMOS bytes on computers with one of + these chipsets, say 'y' here. + endmenu menu "Build Options" |