mirror of https://gitee.com/openkylin/linux.git
a874d811f0
Mainly this is a preparation patch before adding one-by-one DMA SG entries transmission. But logically the Tx and Rx DMA channels setup should be performed in the dma_setup() callback anyway. So we'll move the DMA slave channels src/dst burst lengths, address and address width configuration from the Tx/Rx channels preparation methods to the dedicated functions and then make sure it's called at the DMA setup stage. Note we now make sure the return value of the dmaengine_slave_config() method doesn't indicate an error. It has been unnecessary in case if Dw DMAC is utilized as a DMA engine, since its device_config() callback always returns zero (though it might change in future). But since DW APB SSI driver now supports any DMA back-end we must make sure the DMA device configuration has been successful before proceeding with further setups. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Link: https://lore.kernel.org/r/20200920112322.24585-4-Sergey.Semin@baikalelectronics.ru Signed-off-by: Mark Brown <broonie@kernel.org> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| 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 | ||
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.