From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
The calculation formula for nominal bit rate of classical CAN is same as
that of nominal bit rate of CANFD on the RZ/G3E SoC compared to other SoCs.
Add shared_bittiming variable to struct rcar_canfd_hw_info to handle this
difference.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Reviewed-by: Fabrizio Castro <fabrizio.castro.jz@xxxxxxxxxxx>
---
v1->v2:
* No change.
---
drivers/net/can/rcar/rcar_canfd.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index b3c8c592fb0e..ce355f79e6b6 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -461,6 +461,7 @@ struct rcar_canfd_hw_info {
unsigned ch_interface_mode:1; /* Has channel interface mode */
unsigned shared_can_regs:1; /* Has shared classical can registers */
unsigned external_clk:1; /* Has external clock */
+ unsigned shared_bittiming:1; /* Has shared nominal bittiming constants */
};
/* Channel priv data */
@@ -632,6 +633,7 @@ static const struct rcar_canfd_hw_info rcar_gen3_hw_info = {
.ch_interface_mode = 0,
.shared_can_regs = 0,
.external_clk = 1,
+ .shared_bittiming = 0,
};
static const struct rcar_canfd_hw_info rcar_gen4_hw_info = {
@@ -649,6 +651,7 @@ static const struct rcar_canfd_hw_info rcar_gen4_hw_info = {
.ch_interface_mode = 1,
.shared_can_regs = 1,
.external_clk = 1,
+ .shared_bittiming = 0,
};
static const struct rcar_canfd_hw_info rzg2l_hw_info = {
@@ -666,6 +669,7 @@ static const struct rcar_canfd_hw_info rzg2l_hw_info = {
.ch_interface_mode = 0,
.shared_can_regs = 0,
.external_clk = 1,
+ .shared_bittiming = 0,
};
static const struct rcar_canfd_hw_info r9a09g047_hw_info = {
@@ -683,6 +687,7 @@ static const struct rcar_canfd_hw_info r9a09g047_hw_info = {
.ch_interface_mode = 1,
.shared_can_regs = 1,
.external_clk = 0,
+ .shared_bittiming = 1,
};
/* Helper functions */
@@ -1912,7 +1917,10 @@ static int rcar_canfd_channel_probe(struct rcar_canfd_global *gpriv, u32 ch,
priv->can.fd.do_get_auto_tdcv = rcar_canfd_get_auto_tdcv;
} else {
/* Controller starts in Classical CAN only mode */
- priv->can.bittiming_const = &rcar_canfd_bittiming_const;
+ if (gpriv->info->shared_bittiming)
+ priv->can.bittiming_const = gpriv->info->nom_bittiming;
+ else
+ priv->can.bittiming_const = &rcar_canfd_bittiming_const;
priv->can.ctrlmode_supported = CAN_CTRLMODE_BERR_REPORTING;
}
--
2.43.0
