[PATCH net-next 0/3] net: dsa: lantiq: add support for Intel GSW150

[PATCH net-next 0/3] net: dsa: lantiq: add support for Intel GSW150

[Daniel Golle]

The Intel GSW150 Ethernet Switch (aka. Lantiq PEB7084) is the predecessor of
MaxLinear's GSW1xx series of switches. It shares most features, but has a
slightly different port layout and different MII interfaces.
Adding support for this switch to the mxl-gsw1xx driver is quite trivial.

Daniel Golle (3):
  dt-bindings: net: dsa: lantiq,gswip: add Intel GSW150
  net: dsa: lantiq: allow arbitrary MII registers
  net: dsa: mxl-gsw1xx: add support for Intel GSW150

 .../bindings/net/dsa/lantiq,gswip.yaml        |  2 +
 drivers/net/dsa/lantiq/lantiq_gswip.c         | 26 +++++-
 drivers/net/dsa/lantiq/lantiq_gswip.h         |  4 +-
 drivers/net/dsa/lantiq/lantiq_gswip_common.c  | 27 +-----
 drivers/net/dsa/lantiq/mxl-gsw1xx.c           | 93 ++++++++++++++++---
 drivers/net/dsa/lantiq/mxl-gsw1xx.h           |  2 +
 6 files changed, 114 insertions(+), 40 deletions(-)

-- 
2.52.0

[PATCH net-next 1/3] dt-bindings: net: dsa: lantiq,gswip: add Intel GSW150

[Daniel Golle]

Add compatible strings for the Intel GSW150 which is apparently
identical or at least compatible with the Lantiq PEB7084 Ethernet
switch IC.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
index 747106810cc17..f8d14708af560 100644
--- a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
@@ -19,6 +19,8 @@ maintainers:
 properties:
   compatible:
     enum:
+      - intel,gsw150
+      - lantiq,peb7084
       - lantiq,xrx200-gswip
       - lantiq,xrx300-gswip
       - lantiq,xrx330-gswip
-- 
2.52.0

[PATCH net-next 2/3] net: dsa: lantiq: allow arbitrary MII registers

[Daniel Golle]

The Lantiq GSWIP and MaxLinear GSW1xx drivers are currently relying on a
hard-coded mapping of MII ports to their respective MII_CFG and MII_PCDU
registers and only allow applying an offset to the port index.

While this is sufficient for the currently supported hardware, the very
similar Intel GSW150 (aka. Lantiq PEB7084) cannot be described using
this arrangement.

Introduce two arrays to specify the MII_CFG and MII_PCDU registers for
each port, replacing the current bitmap used to safeguard MII ports as
well as the port index offset.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 drivers/net/dsa/lantiq/lantiq_gswip.c        | 26 ++++++++++++++---
 drivers/net/dsa/lantiq/lantiq_gswip.h        |  4 +--
 drivers/net/dsa/lantiq/lantiq_gswip_common.c | 27 +++---------------
 drivers/net/dsa/lantiq/mxl-gsw1xx.c          | 30 ++++++++++++++++----
 4 files changed, 52 insertions(+), 35 deletions(-)

diff --git a/drivers/net/dsa/lantiq/lantiq_gswip.c b/drivers/net/dsa/lantiq/lantiq_gswip.c
index b094001a7c805..4981cfb3e845e 100644
--- a/drivers/net/dsa/lantiq/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq/lantiq_gswip.c
@@ -465,8 +465,18 @@ static void gswip_shutdown(struct platform_device *pdev)
 static const struct gswip_hw_info gswip_xrx200 = {
 	.max_ports = 7,
 	.allowed_cpu_ports = BIT(6),
-	.mii_ports = BIT(0) | BIT(1) | BIT(5),
-	.mii_port_reg_offset = 0,
+	.mii_cfg = {
+		[0 ... 7] = -1,
+		[0] = GSWIP_MII_CFGp(0),
+		[1] = GSWIP_MII_CFGp(1),
+		[5] = GSWIP_MII_CFGp(5),
+	},
+	.mii_pcdu = {
+		[0 ... 7] = -1,
+		[0] = GSWIP_MII_PCDU0,
+		[1] = GSWIP_MII_PCDU1,
+		[5] = GSWIP_MII_PCDU5,
+	},
 	.phylink_get_caps = gswip_xrx200_phylink_get_caps,
 	.pce_microcode = &gswip_pce_microcode,
 	.pce_microcode_size = ARRAY_SIZE(gswip_pce_microcode),
@@ -476,8 +486,16 @@ static const struct gswip_hw_info gswip_xrx200 = {
 static const struct gswip_hw_info gswip_xrx300 = {
 	.max_ports = 7,
 	.allowed_cpu_ports = BIT(6),
-	.mii_ports = BIT(0) | BIT(5),
-	.mii_port_reg_offset = 0,
+	.mii_cfg = {
+		[0 ... 7] = -1,
+		[0] = GSWIP_MII_CFGp(0),
+		[5] = GSWIP_MII_CFGp(5),
+	},
+	.mii_pcdu = {
+		[0 ... 7] = -1,
+		[0] = GSWIP_MII_PCDU0,
+		[5] = GSWIP_MII_PCDU5,
+	},
 	.phylink_get_caps = gswip_xrx300_phylink_get_caps,
 	.pce_microcode = &gswip_pce_microcode,
 	.pce_microcode_size = ARRAY_SIZE(gswip_pce_microcode),
diff --git a/drivers/net/dsa/lantiq/lantiq_gswip.h b/drivers/net/dsa/lantiq/lantiq_gswip.h
index 8fc4c7cc5283a..b87a68a1b3b67 100644
--- a/drivers/net/dsa/lantiq/lantiq_gswip.h
+++ b/drivers/net/dsa/lantiq/lantiq_gswip.h
@@ -253,8 +253,8 @@ struct gswip_pce_microcode {
 struct gswip_hw_info {
 	int max_ports;
 	unsigned int allowed_cpu_ports;
-	unsigned int mii_ports;
-	int mii_port_reg_offset;
+	s16 mii_cfg[8];
+	s16 mii_pcdu[8];
 	bool supports_2500m;
 	const struct gswip_pce_microcode (*pce_microcode)[];
 	size_t pce_microcode_size;
diff --git a/drivers/net/dsa/lantiq/lantiq_gswip_common.c b/drivers/net/dsa/lantiq/lantiq_gswip_common.c
index 17a61e445f00f..0e8eedf64d3a3 100644
--- a/drivers/net/dsa/lantiq/lantiq_gswip_common.c
+++ b/drivers/net/dsa/lantiq/lantiq_gswip_common.c
@@ -118,15 +118,11 @@ static u32 gswip_switch_r_timeout(struct gswip_priv *priv, u32 offset,
 static void gswip_mii_mask_cfg(struct gswip_priv *priv, u32 mask, u32 set,
 			       int port)
 {
-	int reg_port;
-
 	/* MII_CFG register only exists for MII ports */
-	if (!(priv->hw_info->mii_ports & BIT(port)))
+	if (priv->hw_info->mii_cfg[port] == -1)
 		return;
 
-	reg_port = port + priv->hw_info->mii_port_reg_offset;
-
-	regmap_write_bits(priv->mii, GSWIP_MII_CFGp(reg_port), mask,
+	regmap_write_bits(priv->mii, priv->hw_info->mii_cfg[port], mask,
 			  set);
 }
 
@@ -610,28 +606,13 @@ static void gswip_mii_delay_setup(struct gswip_priv *priv, struct dsa_port *dp,
 	u32 tx_delay = GSWIP_MII_PCDU_TXDLY_DEFAULT;
 	u32 rx_delay = GSWIP_MII_PCDU_RXDLY_DEFAULT;
 	struct device_node *port_dn = dp->dn;
-	u16 mii_pcdu_reg;
 
 	/* As MII_PCDU registers only exist for MII ports, silently return
 	 * unless the port is an MII port
 	 */
-	if (!(priv->hw_info->mii_ports & BIT(dp->index)))
+	if (priv->hw_info->mii_pcdu[dp->index] == -1)
 		return;
 
-	switch (dp->index + priv->hw_info->mii_port_reg_offset) {
-	case 0:
-		mii_pcdu_reg = GSWIP_MII_PCDU0;
-		break;
-	case 1:
-		mii_pcdu_reg = GSWIP_MII_PCDU1;
-		break;
-	case 5:
-		mii_pcdu_reg = GSWIP_MII_PCDU5;
-		break;
-	default:
-		return;
-	}
-
 	/* legacy code to set default delays according to the interface mode */
 	switch (interface) {
 	case PHY_INTERFACE_MODE_RGMII_ID:
@@ -652,7 +633,7 @@ static void gswip_mii_delay_setup(struct gswip_priv *priv, struct dsa_port *dp,
 	of_property_read_u32(port_dn, "rx-internal-delay-ps", &rx_delay);
 	of_property_read_u32(port_dn, "tx-internal-delay-ps", &tx_delay);
 
-	regmap_write_bits(priv->mii, mii_pcdu_reg,
+	regmap_write_bits(priv->mii, priv->hw_info->mii_pcdu[dp->index],
 			  GSWIP_MII_PCDU_TXDLY_MASK |
 			  GSWIP_MII_PCDU_RXDLY_MASK,
 			  GSWIP_MII_PCDU_TXDLY(tx_delay) |
diff --git a/drivers/net/dsa/lantiq/mxl-gsw1xx.c b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
index 6afc7539fefbe..4390c2df2e4bd 100644
--- a/drivers/net/dsa/lantiq/mxl-gsw1xx.c
+++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
@@ -739,8 +739,14 @@ static void gsw1xx_shutdown(struct mdio_device *mdiodev)
 static const struct gswip_hw_info gsw12x_data = {
 	.max_ports		= GSW1XX_PORTS,
 	.allowed_cpu_ports	= BIT(GSW1XX_MII_PORT) | BIT(GSW1XX_SGMII_PORT),
-	.mii_ports		= BIT(GSW1XX_MII_PORT),
-	.mii_port_reg_offset	= -GSW1XX_MII_PORT,
+	.mii_cfg = {
+		[0 ... 7] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_CFGp(0),
+	},
+	.mii_pcdu = {
+		[0 ... 7] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_PCDU0,
+	},
 	.mac_select_pcs		= gsw1xx_phylink_mac_select_pcs,
 	.phylink_get_caps	= &gsw1xx_phylink_get_caps,
 	.supports_2500m		= true,
@@ -753,8 +759,14 @@ static const struct gswip_hw_info gsw12x_data = {
 static const struct gswip_hw_info gsw140_data = {
 	.max_ports		= GSW1XX_PORTS,
 	.allowed_cpu_ports	= BIT(GSW1XX_MII_PORT) | BIT(GSW1XX_SGMII_PORT),
-	.mii_ports		= BIT(GSW1XX_MII_PORT),
-	.mii_port_reg_offset	= -GSW1XX_MII_PORT,
+	.mii_cfg = {
+		[0 ... 7] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_CFGp(0),
+	},
+	.mii_pcdu = {
+		[0 ... 7] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_PCDU0,
+	},
 	.mac_select_pcs		= gsw1xx_phylink_mac_select_pcs,
 	.phylink_get_caps	= &gsw1xx_phylink_get_caps,
 	.supports_2500m		= true,
@@ -767,8 +779,14 @@ static const struct gswip_hw_info gsw140_data = {
 static const struct gswip_hw_info gsw141_data = {
 	.max_ports		= GSW1XX_PORTS,
 	.allowed_cpu_ports	= BIT(GSW1XX_MII_PORT) | BIT(GSW1XX_SGMII_PORT),
-	.mii_ports		= BIT(GSW1XX_MII_PORT),
-	.mii_port_reg_offset	= -GSW1XX_MII_PORT,
+	.mii_cfg = {
+		[0 ... 7] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_CFGp(0),
+	},
+	.mii_pcdu = {
+		[0 ... 7] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_PCDU0,
+	},
 	.mac_select_pcs		= gsw1xx_phylink_mac_select_pcs,
 	.phylink_get_caps	= gsw1xx_phylink_get_caps,
 	.port_setup		= gsw1xx_port_setup,
-- 
2.52.0

[PATCH net-next 3/3] net: dsa: mxl-gsw1xx: add support for Intel GSW150

[Daniel Golle]

Add support for the Intel GSW150 (aka. Lantiq PEB7084) switch IC to
the mxl-gsw1xx driver. This switch comes with 5 Gigabit Ethernet
copper ports (Intel XWAY PHY11G (xRX v1.2 integrated) PHYs) as well as
one GMII/RGMII and one RGMII port.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 drivers/net/dsa/lantiq/mxl-gsw1xx.c | 63 ++++++++++++++++++++++++++---
 drivers/net/dsa/lantiq/mxl-gsw1xx.h |  2 +
 2 files changed, 60 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/lantiq/mxl-gsw1xx.c b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
index 4390c2df2e4bd..1c6a5456a5caf 100644
--- a/drivers/net/dsa/lantiq/mxl-gsw1xx.c
+++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
@@ -502,6 +502,14 @@ static const struct phylink_pcs_ops gsw1xx_pcs_ops = {
 	.pcs_link_up = gsw1xx_pcs_link_up,
 };
 
+static void gsw1xx_phylink_get_lpi_caps(struct phylink_config *config)
+{
+	config->lpi_capabilities = MAC_100FD | MAC_1000FD;
+	config->lpi_timer_default = 20;
+	memcpy(config->lpi_interfaces, config->supported_interfaces,
+	       sizeof(config->lpi_interfaces));
+}
+
 static void gsw1xx_phylink_get_caps(struct dsa_switch *ds, int port,
 				    struct phylink_config *config)
 {
@@ -536,10 +544,34 @@ static void gsw1xx_phylink_get_caps(struct dsa_switch *ds, int port,
 		break;
 	}
 
-	config->lpi_capabilities = MAC_100FD | MAC_1000FD;
-	config->lpi_timer_default = 20;
-	memcpy(config->lpi_interfaces, config->supported_interfaces,
-	       sizeof(config->lpi_interfaces));
+	gsw1xx_phylink_get_lpi_caps(config);
+}
+
+static void gsw150_phylink_get_caps(struct dsa_switch *ds, int port,
+				    struct phylink_config *config)
+{
+	config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+				   MAC_10 | MAC_100 | MAC_1000;
+
+	switch (port) {
+	case 0: /* port 0~4: built-in 1GE PHYs */
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+		__set_bit(PHY_INTERFACE_MODE_INTERNAL,
+			  config->supported_interfaces);
+		break;
+	case 5: /* port 5: GMII or RGMII */
+		__set_bit(PHY_INTERFACE_MODE_GMII,
+			  config->supported_interfaces);
+		fallthrough;
+	case 6: /* port 6: RGMII */
+		phy_interface_set_rgmii(config->supported_interfaces);
+		break;
+	}
+
+	gsw1xx_phylink_get_lpi_caps(config);
 }
 
 static struct phylink_pcs *gsw1xx_phylink_mac_select_pcs(struct phylink_config *config,
@@ -795,11 +827,32 @@ static const struct gswip_hw_info gsw141_data = {
 	.tag_protocol		= DSA_TAG_PROTO_MXL_GSW1XX,
 };
 
+static const struct gswip_hw_info gsw150_data = {
+	.max_ports		= GSW150_PORTS,
+	.allowed_cpu_ports	= BIT(5) | BIT(6),
+	.mii_cfg = {
+		[0 ... 7] = -1,
+		[5] = 0,
+		[6] = 10,
+	},
+	.mii_pcdu = {
+		[0 ... 7] = -1,
+		[5] = 1,
+		[6] = 11,
+	},
+	.phylink_get_caps	= gsw150_phylink_get_caps,
+	.pce_microcode		= &gsw1xx_pce_microcode,
+	.pce_microcode_size	= ARRAY_SIZE(gsw1xx_pce_microcode),
+	.tag_protocol		= DSA_TAG_PROTO_MXL_GSW1XX,
+};
+
 /*
  * GSW125 is the industrial temperature version of GSW120.
  * GSW145 is the industrial temperature version of GSW140.
  */
 static const struct of_device_id gsw1xx_of_match[] = {
+	{ .compatible = "intel,gsw150", .data = &gsw150_data },
+	{ .compatible = "lantiq,peb7084", .data = &gsw150_data },
 	{ .compatible = "maxlinear,gsw120", .data = &gsw12x_data },
 	{ .compatible = "maxlinear,gsw125", .data = &gsw12x_data },
 	{ .compatible = "maxlinear,gsw140", .data = &gsw140_data },
@@ -823,5 +876,5 @@ static struct mdio_driver gsw1xx_driver = {
 mdio_module_driver(gsw1xx_driver);
 
 MODULE_AUTHOR("Daniel Golle <daniel@makrotopia.org>");
-MODULE_DESCRIPTION("Driver for MaxLinear GSW1xx ethernet switch");
+MODULE_DESCRIPTION("Driver for Intel/MaxLinear GSW1xx Ethernet switch");
 MODULE_LICENSE("GPL");
diff --git a/drivers/net/dsa/lantiq/mxl-gsw1xx.h b/drivers/net/dsa/lantiq/mxl-gsw1xx.h
index 8c0298b2b7663..6d2ab81b14dde 100644
--- a/drivers/net/dsa/lantiq/mxl-gsw1xx.h
+++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.h
@@ -10,6 +10,8 @@
 #include <linux/bitfield.h>
 
 #define GSW1XX_PORTS				6
+#define GSW150_PORTS				7
+
 /* Port used for RGMII or optional RMII */
 #define GSW1XX_MII_PORT				5
 /* Port used for SGMII */
-- 
2.52.0

Re: [PATCH net-next 2/3] net: dsa: lantiq: allow arbitrary MII registers

[Vladimir Oltean]

On Tue, Jan 13, 2026 at 03:25:16AM +0000, Daniel Golle wrote:
> The Lantiq GSWIP and MaxLinear GSW1xx drivers are currently relying on a
> hard-coded mapping of MII ports to their respective MII_CFG and MII_PCDU
> registers and only allow applying an offset to the port index.
> 
> While this is sufficient for the currently supported hardware, the very
> similar Intel GSW150 (aka. Lantiq PEB7084) cannot be described using
> this arrangement.
> 
> Introduce two arrays to specify the MII_CFG and MII_PCDU registers for
> each port, replacing the current bitmap used to safeguard MII ports as
> well as the port index offset.
> 
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>
> ---
> diff --git a/drivers/net/dsa/lantiq/lantiq_gswip.h b/drivers/net/dsa/lantiq/lantiq_gswip.h
> index 8fc4c7cc5283a..b87a68a1b3b67 100644
> --- a/drivers/net/dsa/lantiq/lantiq_gswip.h
> +++ b/drivers/net/dsa/lantiq/lantiq_gswip.h
> @@ -253,8 +253,8 @@ struct gswip_pce_microcode {
>  struct gswip_hw_info {
>  	int max_ports;
>  	unsigned int allowed_cpu_ports;
> -	unsigned int mii_ports;
> -	int mii_port_reg_offset;
> +	s16 mii_cfg[8];
> +	s16 mii_pcdu[8];

Why [8] and not [7] (the larger of GSW150_PORTS and GSW1XX_PORTS)?
I would prefer to see a macro holding the largest port count of the
supported switches, and the "7" also expressed as that value - 1.

>  	bool supports_2500m;
>  	const struct gswip_pce_microcode (*pce_microcode)[];
>  	size_t pce_microcode_size;

Re: [PATCH net-next 3/3] net: dsa: mxl-gsw1xx: add support for Intel GSW150

[Vladimir Oltean]

On Tue, Jan 13, 2026 at 03:25:34AM +0000, Daniel Golle wrote:
> Add support for the Intel GSW150 (aka. Lantiq PEB7084) switch IC to
> the mxl-gsw1xx driver. This switch comes with 5 Gigabit Ethernet
> copper ports (Intel XWAY PHY11G (xRX v1.2 integrated) PHYs) as well as
> one GMII/RGMII and one RGMII port.
> 
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>
> ---
>  drivers/net/dsa/lantiq/mxl-gsw1xx.c | 63 ++++++++++++++++++++++++++---
>  drivers/net/dsa/lantiq/mxl-gsw1xx.h |  2 +
>  2 files changed, 60 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/dsa/lantiq/mxl-gsw1xx.c b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
> index 4390c2df2e4bd..1c6a5456a5caf 100644
> --- a/drivers/net/dsa/lantiq/mxl-gsw1xx.c
> +++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
> +static void gsw150_phylink_get_caps(struct dsa_switch *ds, int port,
> +				    struct phylink_config *config)
> +{
> +	config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
> +				   MAC_10 | MAC_100 | MAC_1000;
> +
> +	switch (port) {
> +	case 0: /* port 0~4: built-in 1GE PHYs */
> +	case 1:
> +	case 2:
> +	case 3:
> +	case 4:

I think there's a syntax for this, see mt7530_mac_port_get_caps():

	case 0 ... 4:

also, you can drop "port X: " from the comments.

> +		__set_bit(PHY_INTERFACE_MODE_INTERNAL,
> +			  config->supported_interfaces);
> +		break;
> +	case 5: /* port 5: GMII or RGMII */
> +		__set_bit(PHY_INTERFACE_MODE_GMII,
> +			  config->supported_interfaces);
> +		fallthrough;
> +	case 6: /* port 6: RGMII */
> +		phy_interface_set_rgmii(config->supported_interfaces);
> +		break;
> +	}
> +
> +	gsw1xx_phylink_get_lpi_caps(config);
>  }