The tcan4x5x chip support bulk read/write, but as the length field is only 8 bits wide, the maximum is 256. A length of 0 is treated as 256. Reviewed-by: Dan Murphy <dmurphy@xxxxxx> Tested-by: Sean Nyekjaer <sean@xxxxxxxxxx> Link: https://lore.kernel.org/r/20201215231746.1132907-14-mkl@xxxxxxxxxxxxxx Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> --- drivers/net/can/m_can/tcan4x5x-regmap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/can/m_can/tcan4x5x-regmap.c b/drivers/net/can/m_can/tcan4x5x-regmap.c index c6963437064c..f113881fb012 100644 --- a/drivers/net/can/m_can/tcan4x5x-regmap.c +++ b/drivers/net/can/m_can/tcan4x5x-regmap.c @@ -67,6 +67,8 @@ static const struct regmap_bus tcan4x5x_bus = { .read = tcan4x5x_regmap_read, .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, .val_format_endian_default = REGMAP_ENDIAN_NATIVE, + .max_raw_read = 256, + .max_raw_write = 256, }; int tcan4x5x_regmap_init(struct tcan4x5x_priv *priv) -- 2.29.2
