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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2020-01-06 19:00:31 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2020-01-09 21:29:53 +0000 |
| commit | 7cdcc38f292d7a8ffd285d17c848e60e41eec759 (patch) | |
| tree | 13bba3b16f89d74367fdc043e10d707534a24525 /src/southbridge/intel/common | |
| parent | c528426b264c897b6c17ef14846afea3711042cb (diff) | |
sb/intel/common: Add smbus_host_reset()
Change-Id: I3f6000df391295e2c0ce910a2a919a1dd3333519
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38229
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Diffstat (limited to 'src/southbridge/intel/common')
| -rw-r--r-- | src/southbridge/intel/common/smbus.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/southbridge/intel/common/smbus.c b/src/southbridge/intel/common/smbus.c index f294f3163b..f6805ad50f 100644 --- a/src/southbridge/intel/common/smbus.c +++ b/src/southbridge/intel/common/smbus.c @@ -92,6 +92,15 @@ static void host_and_or(uintptr_t base, u8 reg, u8 mask, u8 or) host_outb(base, reg, value); } +void smbus_host_reset(uintptr_t base) +{ + /* Disable interrupt generation. */ + host_outb(base, SMBHSTCTL, 0); + + /* Clear any lingering errors, so transactions can run. */ + host_and_or(base, SMBHSTSTAT, 0xff, 0); +} + static int host_completed(u8 status) { if (status & SMBHSTSTS_HOST_BUSY) |