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[31.53.6.191]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b4db1be3csm33203505e9.1.2025.08.21.07.14.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Aug 2025 07:14:31 -0700 (PDT) From: Biju X-Google-Original-From: Biju To: Marc Kleine-Budde , Vincent Mailhol , Geert Uytterhoeven , Magnus Damm Cc: Biju Das , linux-can@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar Mahadev Lad , Biju Das , Fabrizio Castro Subject: [PATCH v2 1/4] can: rcar_canfd: Add shared_bittiming variable to struct rcar_canfd_hw_info Date: Thu, 21 Aug 2025 15:14:21 +0100 Message-ID: <20250821141429.298324-2-biju.das.jz@bp.renesas.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250821141429.298324-1-biju.das.jz@bp.renesas.com> References: <20250821141429.298324-1-biju.das.jz@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Biju Das 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 Reviewed-by: Fabrizio Castro --- 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 */ }; =20 /* Channel priv data */ @@ -632,6 +633,7 @@ static const struct rcar_canfd_hw_info rcar_gen3_hw_inf= o =3D { .ch_interface_mode =3D 0, .shared_can_regs =3D 0, .external_clk =3D 1, + .shared_bittiming =3D 0, }; =20 static const struct rcar_canfd_hw_info rcar_gen4_hw_info =3D { @@ -649,6 +651,7 @@ static const struct rcar_canfd_hw_info rcar_gen4_hw_inf= o =3D { .ch_interface_mode =3D 1, .shared_can_regs =3D 1, .external_clk =3D 1, + .shared_bittiming =3D 0, }; =20 static const struct rcar_canfd_hw_info rzg2l_hw_info =3D { @@ -666,6 +669,7 @@ static const struct rcar_canfd_hw_info rzg2l_hw_info = =3D { .ch_interface_mode =3D 0, .shared_can_regs =3D 0, .external_clk =3D 1, + .shared_bittiming =3D 0, }; =20 static const struct rcar_canfd_hw_info r9a09g047_hw_info =3D { @@ -683,6 +687,7 @@ static const struct rcar_canfd_hw_info r9a09g047_hw_inf= o =3D { .ch_interface_mode =3D 1, .shared_can_regs =3D 1, .external_clk =3D 0, + .shared_bittiming =3D 1, }; =20 /* Helper functions */ @@ -1912,7 +1917,10 @@ static int rcar_canfd_channel_probe(struct rcar_canf= d_global *gpriv, u32 ch, priv->can.fd.do_get_auto_tdcv =3D rcar_canfd_get_auto_tdcv; } else { /* Controller starts in Classical CAN only mode */ - priv->can.bittiming_const =3D &rcar_canfd_bittiming_const; + if (gpriv->info->shared_bittiming) + priv->can.bittiming_const =3D gpriv->info->nom_bittiming; + else + priv->can.bittiming_const =3D &rcar_canfd_bittiming_const; priv->can.ctrlmode_supported =3D CAN_CTRLMODE_BERR_REPORTING; } =20 --=20 2.43.0