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When the TMS is switched on, the node uses PWM (Pulse Width Modulation) during the data phase instead of the classic NRZ (Non Return to Zero) encoding. PWM is configured by three parameters: - PWMS: Pulse Width Modulation Short phase - PWML: Pulse Width Modulation Long phase - PWMO: Pulse Width Modulation Offset time For each of these parameters, define three IFLA symbols: - IFLA_CAN_PWM_PWM*_MIN: the minimum allowed value. - IFLA_CAN_PWM_PWM*_MAX: the maximum allowed value. - IFLA_CAN_PWM_PWM*: the runtime value. This results in a total of nine IFLA symbols which are all nested in a parent IFLA_CAN_XL_PWM symbol. IFLA_CAN_PWM_PWM*_MIN and IFLA_CAN_PWM_PWM*_MAX define the range of allowed values and will match the value statically configured by the device in struct can_pwm_const. IFLA_CAN_PWM_PWM* match the runtime values stored in struct can_pwm. Those parameters may only be configured when the tms mode is on. If the PWMS, PWML and PWMO parameters are provided, check that all the needed parameters are present using can_validate_pwm(), then check their value using can_validate_pwm_bittiming(). PWMO defaults to zero if omitted. Otherwise, if CAN_CTRLMODE_XL_TMS is true but none of the PWM parameters are provided, calculate them using can_calc_pwm(). Signed-off-by: Vincent Mailhol <mailhol@kernel.org> Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Link: https://patch.msgid.link/20251126-canxl-v8-11-e7e3eb74f889@pengutronix.de Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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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.