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Message-Id: <20220720081034.3277385-30-mkl@pengutronix.de> Date: Wed, 20 Jul 2022 10:10:34 +0200 From: Marc Kleine-Budde <mkl@...gutronix.de> To: netdev@...r.kernel.org Cc: davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org, kernel@...gutronix.de, Vincent Mailhol <mailhol.vincent@...adoo.fr>, Marc Kleine-Budde <mkl@...gutronix.de> Subject: [PATCH net-next 29/29] can: error: add definitions for the different CAN error thresholds From: Vincent Mailhol <mailhol.vincent@...adoo.fr> Currently, drivers are using magic numbers to derive the CAN error states from the error counter. Add three macro declarations to remediate this. For reference, the error-active, error-passive and bus-off are defined in ISO 11898, section 12.1.4.2 "Error counting". Although ISO 11898 does not define error-warning state, this extra value is also commonly used and is thus also added. Link: https://lore.kernel.org/all/20220719143550.3681-13-mailhol.vincent@wanadoo.fr Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de> --- include/uapi/linux/can/error.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/uapi/linux/can/error.h b/include/uapi/linux/can/error.h index b7c3efd9ff99..acc1ac393d2a 100644 --- a/include/uapi/linux/can/error.h +++ b/include/uapi/linux/can/error.h @@ -127,4 +127,17 @@ /* TX error counter / data[6] */ /* RX error counter / data[7] */ +/* CAN state thresholds + * + * Error counter Error state + * ----------------------------------- + * 0 - 95 Error-active + * 96 - 127 Error-warning + * 128 - 255 Error-passive + * 256 and greater Bus-off + */ +#define CAN_ERROR_WARNING_THRESHOLD 96 +#define CAN_ERROR_PASSIVE_THRESHOLD 128 +#define CAN_BUS_OFF_THRESHOLD 256 + #endif /* _UAPI_CAN_ERROR_H */ -- 2.35.1
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