# git rev-parse -q --verify cbf5c33ba2f308fc9a42c947d3478698d10fd205^{commit}
cbf5c33ba2f308fc9a42c947d3478698d10fd205
already have revision, skipping fetch
# git checkout -q -f -B kisskb cbf5c33ba2f308fc9a42c947d3478698d10fd205
# git clean -qxdf
# < git log -1
# commit cbf5c33ba2f308fc9a42c947d3478698d10fd205
# Author: Cédric Le Goater <clg@kaod.org>
# Date:   Fri Jun 22 12:13:04 2018 +0200
# 
#     mtd: spi-nor: aspeed: introduce optimized settings for fast reads
#     
#     Better settings for fast reads are looked for by implementing a SPI
#     Timing calibration sequence described in the Aspeed SoC specification
#     document. The code is based on the OpenPOWER pflash tool and a similar
#     sequence using DMAs can be found in the SDK U-Boot.
#     
#     The SPI calibration performs a loop on different SPI clock rates
#     (dividers of the AHB clock rates) and on different input delay cycles
#     for each SPI clock rates. The successive read results are compared to
#     a golden buffer, read at low speed, to select the fastest read
#     settings for the chip.
#     
#     The "spi-max-frequency" property is used to cap the optimize read
#     algorithm on some devices or controllers for which we want a safe
#     setting, on the FMC controller chips for instance.
#     
#     It can also be deactivated at boot time with a kernel parameter
#     'optimize_read', but that was never used on the field.
#     
#     Signed-off-by: Cédric Le Goater <clg@kaod.org>
# < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-gcc --version
# < git log --format=%s --max-count=1 cbf5c33ba2f308fc9a42c947d3478698d10fd205
# < make -s -j 48 ARCH=xtensa O=/kisskb/build/cdrx_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  defconfig
drivers/staging/mt7621-dts/Kconfig:4:warning: 'BUILTIN_DTB' has wrong type. 'select' only accept arguments of bool and tristate type
# make -s -j 48 ARCH=xtensa O=/kisskb/build/cdrx_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-  
drivers/staging/mt7621-dts/Kconfig:4:warning: 'BUILTIN_DTB' has wrong type. 'select' only accept arguments of bool and tristate type
<stdin>:1332:2: warning: #warning syscall io_pgetevents not implemented [-Wcpp]
<stdin>:1335:2: warning: #warning syscall rseq not implemented [-Wcpp]
/kisskb/src/net/Makefile:24: CC cannot link executables. Skipping bpfilter.
Completed OK
# rm -rf /kisskb/build/cdrx_xtensa-defconfig_xtensa
# Build took: 0:00:29.650074