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| author | Felix Held <felix-coreboot@felixheld.de> | 2020-12-01 21:29:59 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2020-12-02 21:28:19 +0000 |
| commit | f42da176de685ebc6432da1008c408876060dced (patch) | |
| tree | 6d18b89d302265152c2c8ff1bececa45adfd6d20 | |
| parent | 43a5f88bb428080ab6e361ef6bc5e92169ee8452 (diff) | |
| download | coreboot-f42da176de685ebc6432da1008c408876060dced.tar.xz | |
soc/amd/common/smbus: remove misleading definition
SMBHST_STAT_NOERROR was a redefinition of SMBHST_STAT_INTERRUPT that was
used in smbus_wait_until_done. Remove the misleading bit definition that
also didn't correspond with the register definitions and replace it with
the definition of the actual bit that gets checked. Also add a comment
that the code actually checks the IRQ status flag to see if the last
command is already completed.
Change-Id: I1a58fe0d58d3887dd2e83320e977a57e271685b3
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48219
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/smbus.h | 1 | ||||
| -rw-r--r-- | src/soc/amd/common/block/smbus/smbus.c | 3 |
2 files changed, 2 insertions, 2 deletions
diff --git a/src/soc/amd/common/block/include/amdblocks/smbus.h b/src/soc/amd/common/block/include/amdblocks/smbus.h index 773daf796c..73f63b02eb 100644 --- a/src/soc/amd/common/block/include/amdblocks/smbus.h +++ b/src/soc/amd/common/block/include/amdblocks/smbus.h @@ -11,7 +11,6 @@ #define SMBHST_STAT_INTERRUPT (1 << 1) #define SMBHST_STAT_BUSY (1 << 0) #define SMBHST_STAT_CLEAR 0xff -#define SMBHST_STAT_NOERROR (1 << 1) /* TODO: this one looks odd */ #define SMBHST_STAT_VAL_BITS 0x1f #define SMBHST_STAT_ERROR_BITS 0x1c diff --git a/src/soc/amd/common/block/smbus/smbus.c b/src/soc/amd/common/block/smbus/smbus.c index e94adf5bc6..4fb68d425d 100644 --- a/src/soc/amd/common/block/smbus/smbus.c +++ b/src/soc/amd/common/block/smbus/smbus.c @@ -69,7 +69,8 @@ static int smbus_wait_until_done(uintptr_t mmio) val &= SMBHST_STAT_VAL_BITS; /* mask off reserved bits */ if (val & SMBHST_STAT_ERROR_BITS) return -5; /* error */ - if (val == SMBHST_STAT_NOERROR) { + /* check IRQ status bit to see if the last host command is completed */ + if (val == SMBHST_STAT_INTERRUPT) { controller_write8(mmio, SMBHSTSTAT, val); /* clr sts */ return 0; } |