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465b13cc0a
It never makes sense to set the IO voltage of the SD card (vqmmc) to a voltage that's higher than the voltage of the card's main power supply (vmmc). The card's main voltage is 2.952V on trogdor, so let's set the max for the IO voltage to the same. NOTE: On Linux, this is pretty much a no-op currently. Linux already makes an effort to match vqmmc with vmmc when running at "3.3" signal voltage, so both before and after this change we end up running vqmmc at 2.904V when talking to non-UHS cards. It still seems cleaner to make it a little more correct, though. Also note: as per above, on Linux right now we end up running vqmmc as 2.904V even though vmmc is 2.952V. This isn't super ideal but shouldn't really hurt. Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/20201204104900.1.I0a4ac2c7f4d405431cf95eb7b7c36800660516ec@changeid Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> |
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| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.