diff options
| author | Kane Chen <kane.chen@intel.com> | 2017-10-16 19:40:18 +0800 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2017-10-31 15:49:55 +0000 |
| commit | 66f1f382cd3bd5a7250e0a7ad35d9a1c505de47a (patch) | |
| tree | 899e5780ab5d63b9e8d4a6d9402fe0d3f8f4c9e8 /src/include | |
| parent | dfd2a8b7e7bba6ccffb141f812f70b5bc608f37a (diff) | |
intel/common/smbus: increase spd read performance
This change increases the spd read performance by using smbus word
access.
BUG=b:67021853
TEST=boot to os and find 80~100 ms boot time improvement on one dimm
Change-Id: I98fe67642d8ccd428bccbca7f6390331d6055d14
Signed-off-by: Kane Chen <kane.chen@intel.com>
Reviewed-on: https://review.coreboot.org/22072
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/device/early_smbus.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/include/device/early_smbus.h b/src/include/device/early_smbus.h index e3fe4fe982..c9073967b1 100644 --- a/src/include/device/early_smbus.h +++ b/src/include/device/early_smbus.h @@ -63,6 +63,7 @@ void smbus_reset(u32 smbus_dev); int smbus_print_error(u32 smbus_dev, u8 host_status, int loops); int smbus_is_busy(u32 smbus_dev); int smbus_wait_until_ready(u32 smbus_dev); +u16 smbus_read_word(u32 smbus_dev, u8 addr, u8 offset); u8 smbus_read_byte(u32 smbus_dev, u8 addr, u8 offset); u8 smbus_write_byte(u32 smbus_dev, u8 addr, u8 offset, u8 value); void smbus_delay(void); |