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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Simon Horman , Philipp Zabel , Russell King , Geert Uytterhoeven , Magnus Damm Cc: linux-renesas-soc@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Fabrizio Castro , Lad Prabhakar Subject: [PATCH net-next 08/11] net: dsa: rzn1-a5psw: Make DSA tag protocol configurable via OF data Date: Fri, 21 Nov 2025 11:35:34 +0000 Message-ID: <20251121113553.2955854-9-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251121113553.2955854-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20251121113553.2955854-1-prabhakar.mahadev-lad.rj@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: Lad Prabhakar Update the RZN1 A5PSW driver to obtain the DSA tag protocol from device-specific data instead of using a hard-coded value. Add a new `tag_proto` field to `struct a5psw_of_data` and use it in `a5psw_get_tag_protocol()` to return the appropriate protocol for each SoC. This allows future SoCs such as RZ/T2H and RZ/N2H, which use the DSA_TAG_PROTO_RZT2H_ETHSW tag format, to share the same driver infrastructure without code duplication. Signed-off-by: Lad Prabhakar --- drivers/net/dsa/rzn1_a5psw.c | 5 ++++- drivers/net/dsa/rzn1_a5psw.h | 2 ++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/net/dsa/rzn1_a5psw.c b/drivers/net/dsa/rzn1_a5psw.c index d957b6d40f05..dc42a409eaef 100644 --- a/drivers/net/dsa/rzn1_a5psw.c +++ b/drivers/net/dsa/rzn1_a5psw.c @@ -97,7 +97,9 @@ static enum dsa_tag_protocol a5psw_get_tag_protocol(struc= t dsa_switch *ds, int port, enum dsa_tag_protocol mp) { - return DSA_TAG_PROTO_RZN1_A5PSW; + struct a5psw *a5psw =3D ds->priv; + + return a5psw->of_data->tag_proto; } =20 static void a5psw_port_pattern_set(struct a5psw *a5psw, int port, int patt= ern, @@ -1316,6 +1318,7 @@ static void a5psw_shutdown(struct platform_device *pd= ev) static const struct a5psw_of_data rzn1_of_data =3D { .nports =3D 5, .cpu_port =3D 4, + .tag_proto =3D DSA_TAG_PROTO_RZN1_A5PSW, }; =20 static const struct of_device_id a5psw_of_mtable[] =3D { diff --git a/drivers/net/dsa/rzn1_a5psw.h b/drivers/net/dsa/rzn1_a5psw.h index d1b2cc5b43e6..0fef32451e4f 100644 --- a/drivers/net/dsa/rzn1_a5psw.h +++ b/drivers/net/dsa/rzn1_a5psw.h @@ -234,10 +234,12 @@ union lk_data { * struct a5psw_of_data - OF data structure * @nports: Number of ports in the switch * @cpu_port: CPU port number + * @tag_proto: DSA tag protocol used by the switch */ struct a5psw_of_data { unsigned int nports; unsigned int cpu_port; + enum dsa_tag_protocol tag_proto; }; =20 /** --=20 2.52.0