From 7cdcc38f292d7a8ffd285d17c848e60e41eec759 Mon Sep 17 00:00:00 2001 From: Kyösti Mälkki Date: Mon, 6 Jan 2020 19:00:31 +0200 Subject: sb/intel/common: Add smbus_host_reset() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: I3f6000df391295e2c0ce910a2a919a1dd3333519 Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/c/coreboot/+/38229 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons --- src/southbridge/intel/common/smbus.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'src/southbridge/intel/common/smbus.c') 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) -- cgit v1.2.3