diff options
| author | Ronald G. Minnich <rminnich@gmail.com> | 2006-07-27 04:05:43 +0000 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2006-07-27 04:05:43 +0000 |
| commit | 59fc4db642bcf9c0a80785524e0740b03bfcacfe (patch) | |
| tree | 73f5e04428846b09b19e01f2806b284925a66e73 /src | |
| parent | cb8eab482ff09ec256456312ef2d6e7710123551 (diff) | |
"Hey Ron - Attached is a simple patch that enables the upper banks on the
UART. If the upper banks are enabled, then the Linux 8250 driver knows
how to set baud speeds greater then 115200. This was prompted by David
Woodhouse.
Jordan"
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2348 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src')
| -rw-r--r-- | src/southbridge/amd/cs5536/cs5536_early_setup.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/southbridge/amd/cs5536/cs5536_early_setup.c b/src/southbridge/amd/cs5536/cs5536_early_setup.c index ab9725865e..5163ca6a15 100644 --- a/src/southbridge/amd/cs5536/cs5536_early_setup.c +++ b/src/southbridge/amd/cs5536/cs5536_early_setup.c @@ -190,7 +190,12 @@ static int cs5536_setup_onchipuart(void) * MSR 0x51400021 bit [27:24] */ msr_t msr; - msr.lo = 2; + + /* Bit 1 = DEVEN (device enable) + * Bit 4 = EN_BANKS (allow access to the upper banks) + */ + + msr.lo = (1 << 4) | (1 << 1); msr.hi = 0; /* This enables COM2, but that should be done elsewhere wrmsr(0x5140003e, msr); |