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Linux kernel source tree
c0838d3a93
The I2C IP doesn't support writes or reads of 0 bytes. In order for a START/STOP transaction to take place on the bus, the data written/read has to be at least one byte. That is, you cannot generate a write with 0 bytes, just to get the ACK from a device, just so you can probe that device if it is on the bus and so to discover all devices on the bus--you'll have to read at least one byte. Writes of 0 bytes generate no START/STOP on this I2C IP--the bus is not engaged at all. Set the I2C_AQ_NO_ZERO_LEN to the existing I2C quirk tables for Aldebaran, Arcturus, Navi10 and Sienna Cichlid, and add a quirk table to the I2C driver which drives the bus when the SMU doesn't--for instance on Vega20. Cc: Alexander Deucher <Alexander.Deucher@amd.com> Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com> Cc: Lijo Lazar <Lijo.Lazar@amd.com> Cc: John Clements <john.clements@amd.com> Cc: Hawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: Luben Tuikov <luben.tuikov@amd.com> Reviewed-by: Lijo Lazar <Lijo.Lazar@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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| arch | ||
| 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.