[PATCH can-next 04/21] can: rockchip_canfd: add driver for Rockchip CAN-FD controller

[Simon Horman]

On Mon, Jul 29, 2024 at 03:05:35PM +0200, Marc Kleine-Budde wrote:
> Add driver for the Rockchip CAN-FD controller.
> 
> The IP core on the rk3568v2 SoC has 12 documented errata. Corrections
> for these errata will be added in the upcoming patches.
> 
> Since several workarounds are required for the TX path, only add the
> base driver that only implements the RX path.
> 
> Although the RX path implements CAN-FD support, it's not activated in
> ctrlmode_supported, as the IP core in the rk3568v2 has problems with
> receiving or sending certain CAN-FD frames.
> 
> Signed-off-by: Marc Kleine-Budde <mkl at pengutronix.de>

...

> +static void rkcanfd_get_berr_counter_raw(struct rkcanfd_priv *priv,
> +					 struct can_berr_counter *bec)
> +{
> +	struct can_berr_counter bec_raw;
> +
> +	bec->rxerr = rkcanfd_read(priv, RKCANFD_REG_RXERRORCNT);
> +	bec->txerr = rkcanfd_read(priv, RKCANFD_REG_TXERRORCNT);
> +	bec_raw = *bec;

nit: bec_raw is assigned but otherwise unused
     although this is addressed in patch 15 of this series.

> +}

...