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https://github.com/brain-hackers/u-boot-brain
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7e40e1926a
We can safely remove it, because none of the currently supported
boards uses these features.
The existing implementation had multiple problems:
- unnecessary code duplication between sun4i/sun5i/sun7i
- ZQ calibration was never initiated explicitly, and could be
only triggered by setting the highest bit in the 'zq' parameter
in the 'dram_para' struct (this was never actually done for
any of the known Allwinner devices).
- even if the ZQ calibration could be started, no attempts were
made to wait for its completion, or checking whether the
default automatically initiated ZQ calibration is still
in progress
- ODT was only ever enabled on sun4i, but not on sun5i/sun7i
Additionally, SDR_IOCR was set to 0x00cc0000 only on sun4i. There
are some hints in the Rockchip Linux kernel sources, indicating
that these bits are related to the automatic I/O power down
feature, which is poorly understood on sunxi hardware at the
moment. Avoiding to set these bits on sun4i too does not seem to
have any measurable/visible impact.
The impedance and ODT configuration code will be re-introdeced in
one of the next comits.
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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| arm720t | ||
| arm920t | ||
| arm926ejs | ||
| arm946es | ||
| arm1136 | ||
| arm1176 | ||
| arm_intcm | ||
| armv7 | ||
| armv8 | ||
| at91-common | ||
| pxa | ||
| sa1100 | ||
| tegra20-common | ||
| tegra30-common | ||
| tegra114-common | ||
| tegra124-common | ||
| tegra-common | ||
| Makefile | ||
| u-boot-spl.lds | ||
| u-boot.lds | ||