| commit | d2b2be39296d910178173273017800a1b054a1ba | |
| author | Kane Chen <kane.chen@intel.com> | |
| Mon, 13 Apr 2020 12:48:54 +0000 (13 20:48 +0800) | ||
| committer | Tim Wawrzynczak <twawrzynczak@chromium.org> | |
| Tue, 28 Apr 2020 15:43:36 +0000 (28 15:43 +0000) | ||
| tree | 093bc25858c3ae8eb5bfb9ab06e361c0eae5d097 | treesnapshot (tar.gz zip) |
| parent | 007faee9486bcc24e1bc7011717ae88d7eb5e62b | commitdiff |
soc/intel/cannonlake: Report driver strength by _DSM in eMMC ACPI device
According to doc 621880, it suggests setting 40 ohm in byte 185 in extCSD.
This commit provides _DSM method for driver to query driving strength.
TEST=mmc extcsd read |grep HS_TIMING and found bit[7:4] is set to 4
BUG=b:154159888
Signed-off-by: Kane Chen <kane.chen@intel.com>
Change-Id: I1b4df8b0d1d2cad3a7f521ad47ee5a4b3320c767
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40467
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
According to doc 621880, it suggests setting 40 ohm in byte 185 in extCSD.
This commit provides _DSM method for driver to query driving strength.
TEST=mmc extcsd read |grep HS_TIMING and found bit[7:4] is set to 4
BUG=b:154159888
Signed-off-by: Kane Chen <kane.chen@intel.com>
Change-Id: I1b4df8b0d1d2cad3a7f521ad47ee5a4b3320c767
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40467
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
| src/soc/intel/cannonlake/acpi/scs.asl | diffblobblamehistory |