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c6a6c7d0c0
tcpci_maxim currently never triggers the TCPM state machine when CC status has not changed due to a contaminant but due to a real connection event, i.e. a genuine plug event, meaning the system will stay idle and not notify any subscribers. The reason is that the initial state of the port is 'toggling', which causes _max_tcpci_irq() to only drive the contamination part of the TCPM state machine (via tcpm_port_clean()). What should happen instead is that if no contamination was detected, the TCPM should be notified of the CC change in this case. To fix this, we update ...is_contaminant() to also allow its caller to determine if more CC processing is required and then call into the TCPM as required. While at it, add a kernel-doc for max_contaminant_is_contaminant(). Note: the code has an issue where I2C errors during contaminant detection also cause the TCPM state machine to not be updated. This commit doesn't change this behaviour and should be addressed by follow-up commit(s). Signed-off-by: André Draszik <andre.draszik@linaro.org> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20240806-max33359-toggling-v2-1-a66ab37baafb@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 reStructuredText 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.