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| Filename | Latest commit message | Latest commit date |
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75067aba7a
The sdhci get_max_clock callback is set to sdhci_pltfm_clk_get_max_clock and tegra_sdhci_get_max_clock is removed. It appears that the shdci-tegra specific callback was originally introduced due to the requirement that the host clock has to be twice the bus clock on DDR50 mode. As far as I can tell the only effect the removal has on DDR50 mode is in cases where the parent clock is unable to supply the requested clock rate, causing the DDR50 mode to run at a lower frequency. Currently the DDR50 mode isn't enabled on any of the SoCs and would also require configuring the SDHCI clock divider register to function properly. The problem with tegra_sdhci_get_max_clock is that it divides the clock rate by two and thus artificially limits the maximum frequency of faster signaling modes which don't have the host-bus frequency ratio requirement of DDR50 such as SDR104 and HS200. Furthermore, the call to clk_round_rate() may return an error which isn't handled by tegra_sdhci_get_max_clock. Signed-off-by: Aapo Vienamo <avienamo@nvidia.com> Acked-by: Thierry Reding <treding@nvidia.com> Tested-by: Thierry Reding <treding@nvidia.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.