mainlining shenanigans
85ba75bb57
When the PHY powers up, the diagnostics clock isn't enabled (bit 2 in register PHY_CTRL_1 (0x0012)). Also, the PHY is not in standby mode, so bit 13 in PHY_CTRL_3 (0x0017) is always set at power up. The standby mode and the diagnostics clock are both meant to be for the cable diagnostics feature of the PHY (in phylib this would be equivalent to the cable-test support), and for the frame-generator feature of the PHY. In standby mode, the PHY doesn't negotiate links or manage links. To use the cable diagnostics/test (or frame-generator), the PHY must be first set in standby mode, so that the link operation doesn't interfere. Then, the diagnostics clock must be enabled. For the cable-test feature, when the operation finishes, the PHY goes into PHY_UP state, and the config_aneg hook is called. For the ADIN PHY, we need to make sure that during autonegotiation configuration/setup the PHY is removed from standby mode and the diagnostics clock is disabled, so that normal operation is resumed. This change does that by moving the set of the ADIN1300_LINKING_EN bit (2) in the config_aneg (to disable standby mode). Previously, this was set in the downshift setup, because the downshift retry value and the ADIN1300_LINKING_EN are in the same register. And the ADIN1300_DIAG_CLK_EN bit (13) is cleared, to disable the diagnostics clock. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Link: https://lore.kernel.org/r/20201103074436.93790-1-alexandru.ardelean@analog.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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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.