[PATCH net-next v3 0/6] net: dsa: lantiq: add support for Intel GSW150

[PATCH net-next v3 0/6] 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.
---
Changes since v2:
 * enclose the gswip_hw_info initializers in compiler diag exception
   to prevent triggering -Woverride-init

Changes since initial submission:
 * add patch fixing node naming convention for dt-bindings
 * introduce GSWIP_MAX_PORTS macro
 * don't assert SGMII PCS reset in case chip doesn't have SGMII
 * use case ranges in phylink_get_caps


Daniel Golle (6):
  dt-bindings: net: dsa: lantiq,gswip: use correct node name
  dt-bindings: net: dsa: lantiq,gswip: add Intel GSW150
  net: dsa: lantiq: allow arbitrary MII registers
  net: dsa: lantiq: clean up phylink_get_caps switch statement
  net: dsa: mxl-gsw1xx: only setup SerDes PCS if it exists
  net: dsa: mxl-gsw1xx: add support for Intel GSW150

 .../bindings/net/dsa/lantiq,gswip.yaml        |   6 +-
 drivers/net/dsa/lantiq/lantiq_gswip.c         |  49 ++++--
 drivers/net/dsa/lantiq/lantiq_gswip.h         |   6 +-
 drivers/net/dsa/lantiq/lantiq_gswip_common.c  |  27 +---
 drivers/net/dsa/lantiq/mxl-gsw1xx.c           | 146 ++++++++++++++----
 drivers/net/dsa/lantiq/mxl-gsw1xx.h           |   2 +
 6 files changed, 163 insertions(+), 73 deletions(-)

-- 
2.52.0

[PATCH net-next v3 1/6] dt-bindings: net: dsa: lantiq,gswip: use correct node name

[Daniel Golle]

Ethernet PHYs should use nodes named 'ethernet-phy@'.
Rename the Ethernet PHY nodes in the example to comply.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
v3: no changes
v2: new patch

 Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
index 205b683849a53..9c0de536bae97 100644
--- a/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/lantiq,gswip.yaml
@@ -316,7 +316,7 @@ examples:
                 #address-cells = <1>;
                 #size-cells = <0>;
 
-                switchphy0: switchphy@0 {
+                switchphy0: ethernet-phy@0 {
                     reg = <0>;
 
                     leds {
@@ -331,7 +331,7 @@ examples:
                     };
                 };
 
-                switchphy1: switchphy@1 {
+                switchphy1: ethernet-phy@1 {
                     reg = <1>;
 
                     leds {
-- 
2.52.0

[PATCH net-next v3 2/6] 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>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
v3: no changes
v2: no changes

 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 9c0de536bae97..97842523772f4 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 v3 3/6] 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>
---
v3: enclose the gswip_hw_info initializers in compiler diag exception
    to prevent triggering -Woverride-init

v2: introduce GSWIP_MAX_PORTS macro

 drivers/net/dsa/lantiq/lantiq_gswip.c        | 37 ++++++++++++++++----
 drivers/net/dsa/lantiq/lantiq_gswip.h        |  6 ++--
 drivers/net/dsa/lantiq/lantiq_gswip_common.c | 27 +++-----------
 drivers/net/dsa/lantiq/mxl-gsw1xx.c          | 37 ++++++++++++++++----
 4 files changed, 70 insertions(+), 37 deletions(-)

diff --git a/drivers/net/dsa/lantiq/lantiq_gswip.c b/drivers/net/dsa/lantiq/lantiq_gswip.c
index b094001a7c805..b36bc1416d7ff 100644
--- a/drivers/net/dsa/lantiq/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq/lantiq_gswip.c
@@ -12,6 +12,7 @@
 #include "lantiq_pce.h"
 
 #include <linux/clk.h>
+#include <linux/compiler.h>
 #include <linux/delay.h>
 #include <linux/firmware.h>
 #include <linux/mfd/syscon.h>
@@ -462,11 +463,25 @@ static void gswip_shutdown(struct platform_device *pdev)
 	platform_set_drvdata(pdev, NULL);
 }
 
+__diag_push();
+__diag_ignore_all("-Woverride-init",
+		  "logic to initialize all and then override some is OK");
+
 static const struct gswip_hw_info gswip_xrx200 = {
-	.max_ports = 7,
+	.max_ports = GSWIP_MAX_PORTS,
 	.allowed_cpu_ports = BIT(6),
-	.mii_ports = BIT(0) | BIT(1) | BIT(5),
-	.mii_port_reg_offset = 0,
+	.mii_cfg = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -1,
+		[0] = GSWIP_MII_CFGp(0),
+		[1] = GSWIP_MII_CFGp(1),
+		[5] = GSWIP_MII_CFGp(5),
+	},
+	.mii_pcdu = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -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),
@@ -474,16 +489,26 @@ static const struct gswip_hw_info gswip_xrx200 = {
 };
 
 static const struct gswip_hw_info gswip_xrx300 = {
-	.max_ports = 7,
+	.max_ports = GSWIP_MAX_PORTS,
 	.allowed_cpu_ports = BIT(6),
-	.mii_ports = BIT(0) | BIT(5),
-	.mii_port_reg_offset = 0,
+	.mii_cfg = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -1,
+		[0] = GSWIP_MII_CFGp(0),
+		[5] = GSWIP_MII_CFGp(5),
+	},
+	.mii_pcdu = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -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),
 	.tag_protocol = DSA_TAG_PROTO_GSWIP,
 };
 
+__diag_pop();
+
 static const struct of_device_id gswip_of_match[] = {
 	{ .compatible = "lantiq,xrx200-gswip", .data = &gswip_xrx200 },
 	{ .compatible = "lantiq,xrx300-gswip", .data = &gswip_xrx300 },
diff --git a/drivers/net/dsa/lantiq/lantiq_gswip.h b/drivers/net/dsa/lantiq/lantiq_gswip.h
index 2e0f2afbadbbc..524289db7c213 100644
--- a/drivers/net/dsa/lantiq/lantiq_gswip.h
+++ b/drivers/net/dsa/lantiq/lantiq_gswip.h
@@ -243,6 +243,8 @@
 
 #define GSWIP_VLAN_UNAWARE_PVID	0
 
+#define GSWIP_MAX_PORTS		7
+
 struct gswip_pce_microcode {
 	u16 val_3;
 	u16 val_2;
@@ -253,8 +255,8 @@ 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[GSWIP_MAX_PORTS];
+	s16 mii_pcdu[GSWIP_MAX_PORTS];
 	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 e790f2ef75884..05b28b540661a 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);
 }
 
@@ -604,28 +600,13 @@ 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:
@@ -646,7 +627,7 @@ 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 f8ff8a604bf53..acf9e2465b934 100644
--- a/drivers/net/dsa/lantiq/mxl-gsw1xx.c
+++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/bits.h>
+#include <linux/compiler.h>
 #include <linux/delay.h>
 #include <linux/jiffies.h>
 #include <linux/module.h>
@@ -699,11 +700,21 @@ static void gsw1xx_shutdown(struct mdio_device *mdiodev)
 	cancel_delayed_work_sync(&gsw1xx_priv->clear_raneg);
 }
 
+__diag_push();
+__diag_ignore_all("-Woverride-init",
+		  "logic to initialize all and then override some is OK");
+
 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 ... GSWIP_MAX_PORTS - 1] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_CFGp(0),
+	},
+	.mii_pcdu = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -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,
@@ -715,8 +726,14 @@ 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 ... GSWIP_MAX_PORTS - 1] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_CFGp(0),
+	},
+	.mii_pcdu = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -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,
@@ -728,8 +745,14 @@ 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 ... GSWIP_MAX_PORTS - 1] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_CFGp(0),
+	},
+	.mii_pcdu = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -1,
+		[GSW1XX_MII_PORT] = GSWIP_MII_PCDU0,
+	},
 	.mac_select_pcs		= gsw1xx_phylink_mac_select_pcs,
 	.phylink_get_caps	= gsw1xx_phylink_get_caps,
 	.pce_microcode		= &gsw1xx_pce_microcode,
@@ -737,6 +760,8 @@ static const struct gswip_hw_info gsw141_data = {
 	.tag_protocol		= DSA_TAG_PROTO_MXL_GSW1XX,
 };
 
+__diag_pop();
+
 /*
  * GSW125 is the industrial temperature version of GSW120.
  * GSW145 is the industrial temperature version of GSW140.
-- 
2.52.0

[PATCH net-next v3 4/6] net: dsa: lantiq: clean up phylink_get_caps switch statement

[Daniel Golle]

Use case ranges for phylink_get_caps and remove the redundant "port N:"
from the comments.

Suggested-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
v3: no changes
v2: new patch

 drivers/net/dsa/lantiq/lantiq_gswip.c | 12 +++---------
 drivers/net/dsa/lantiq/mxl-gsw1xx.c   | 11 +++++------
 2 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/drivers/net/dsa/lantiq/lantiq_gswip.c b/drivers/net/dsa/lantiq/lantiq_gswip.c
index b36bc1416d7ff..68d5a282800d9 100644
--- a/drivers/net/dsa/lantiq/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq/lantiq_gswip.c
@@ -34,8 +34,7 @@ static void gswip_xrx200_phylink_get_caps(struct dsa_switch *ds, int port,
 					  struct phylink_config *config)
 {
 	switch (port) {
-	case 0:
-	case 1:
+	case 0 ... 1:
 		phy_interface_set_rgmii(config->supported_interfaces);
 		__set_bit(PHY_INTERFACE_MODE_MII,
 			  config->supported_interfaces);
@@ -45,9 +44,7 @@ static void gswip_xrx200_phylink_get_caps(struct dsa_switch *ds, int port,
 			  config->supported_interfaces);
 		break;
 
-	case 2:
-	case 3:
-	case 4:
+	case 2 ... 4:
 	case 6:
 		__set_bit(PHY_INTERFACE_MODE_INTERNAL,
 			  config->supported_interfaces);
@@ -76,10 +73,7 @@ static void gswip_xrx300_phylink_get_caps(struct dsa_switch *ds, int port,
 			  config->supported_interfaces);
 		break;
 
-	case 1:
-	case 2:
-	case 3:
-	case 4:
+	case 1 ... 4:
 	case 6:
 		__set_bit(PHY_INTERFACE_MODE_INTERNAL,
 			  config->supported_interfaces);
diff --git a/drivers/net/dsa/lantiq/mxl-gsw1xx.c b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
index acf9e2465b934..0267196f98464 100644
--- a/drivers/net/dsa/lantiq/mxl-gsw1xx.c
+++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
@@ -512,14 +512,12 @@ static void gsw1xx_phylink_get_caps(struct dsa_switch *ds, int port,
 				   MAC_10 | MAC_100 | MAC_1000;
 
 	switch (port) {
-	case 0:
-	case 1:
-	case 2:
-	case 3:
+	case 0 ... 3: /* built-in PHYs */
 		__set_bit(PHY_INTERFACE_MODE_INTERNAL,
 			  config->supported_interfaces);
 		break;
-	case 4: /* port 4: SGMII */
+
+	case 4: /* SGMII */
 		__set_bit(PHY_INTERFACE_MODE_SGMII,
 			  config->supported_interfaces);
 		__set_bit(PHY_INTERFACE_MODE_1000BASEX,
@@ -530,7 +528,8 @@ static void gsw1xx_phylink_get_caps(struct dsa_switch *ds, int port,
 			config->mac_capabilities |= MAC_2500FD;
 		}
 		return; /* no support for EEE on SGMII port */
-	case 5: /* port 5: RGMII or RMII */
+
+	case 5: /* RGMII or RMII */
 		__set_bit(PHY_INTERFACE_MODE_RMII,
 			  config->supported_interfaces);
 		phy_interface_set_rgmii(config->supported_interfaces);
-- 
2.52.0

[PATCH net-next v3 5/6] net: dsa: mxl-gsw1xx: only setup SerDes PCS if it exists

[Daniel Golle]

Older Intel GSW150 chip doesn't have a SGMII/1000Base-X/2500Base-X PCS.
Prepare for supporting Intel GSW150 by skipping PCS reset and
initialization in case no .mac_select_pcs operation is defined.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
v3: no changes
v2: new patch

 drivers/net/dsa/lantiq/mxl-gsw1xx.c | 37 ++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 14 deletions(-)

diff --git a/drivers/net/dsa/lantiq/mxl-gsw1xx.c b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
index 0267196f98464..54cf7aab3bfe4 100644
--- a/drivers/net/dsa/lantiq/mxl-gsw1xx.c
+++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
@@ -579,6 +579,28 @@ static struct regmap *gsw1xx_regmap_init(struct gsw1xx_priv *priv,
 				priv, &config);
 }
 
+static int gsw1xx_serdes_pcs_init(struct gsw1xx_priv *priv)
+{
+	/* do nothing if the chip doesn't have a SerDes PCS */
+	if (!priv->gswip.hw_info->mac_select_pcs)
+		return 0;
+
+	priv->pcs.ops = &gsw1xx_pcs_ops;
+	priv->pcs.poll = true;
+	__set_bit(PHY_INTERFACE_MODE_SGMII,
+		  priv->pcs.supported_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_1000BASEX,
+		  priv->pcs.supported_interfaces);
+	if (priv->gswip.hw_info->supports_2500m)
+		__set_bit(PHY_INTERFACE_MODE_2500BASEX,
+			  priv->pcs.supported_interfaces);
+	priv->tbi_interface = PHY_INTERFACE_MODE_NA;
+
+	/* assert SGMII reset to power down SGMII unit */
+	return regmap_set_bits(priv->shell, GSW1XX_SHELL_RST_REQ,
+			       GSW1XX_RST_REQ_SGMII_SHELL);
+}
+
 static int gsw1xx_probe(struct mdio_device *mdiodev)
 {
 	struct device *dev = &mdiodev->dev;
@@ -631,20 +653,7 @@ static int gsw1xx_probe(struct mdio_device *mdiodev)
 	if (IS_ERR(priv->shell))
 		return PTR_ERR(priv->shell);
 
-	priv->pcs.ops = &gsw1xx_pcs_ops;
-	priv->pcs.poll = true;
-	__set_bit(PHY_INTERFACE_MODE_SGMII,
-		  priv->pcs.supported_interfaces);
-	__set_bit(PHY_INTERFACE_MODE_1000BASEX,
-		  priv->pcs.supported_interfaces);
-	if (priv->gswip.hw_info->supports_2500m)
-		__set_bit(PHY_INTERFACE_MODE_2500BASEX,
-			  priv->pcs.supported_interfaces);
-	priv->tbi_interface = PHY_INTERFACE_MODE_NA;
-
-	/* assert SGMII reset to power down SGMII unit */
-	ret = regmap_set_bits(priv->shell, GSW1XX_SHELL_RST_REQ,
-			      GSW1XX_RST_REQ_SGMII_SHELL);
+	ret = gsw1xx_serdes_pcs_init(priv);
 	if (ret < 0)
 		return ret;
 
-- 
2.52.0

[PATCH net-next v3 6/6] 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>
---
v3: enclose the gswip_hw_info initializers in compiler diag exception
    to prevent triggering -Woverride-init

v2: clean-up phylink_get_caps

 drivers/net/dsa/lantiq/mxl-gsw1xx.c | 61 ++++++++++++++++++++++++++---
 drivers/net/dsa/lantiq/mxl-gsw1xx.h |  2 +
 2 files changed, 58 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/lantiq/mxl-gsw1xx.c b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
index 54cf7aab3bfe4..0d18b79647064 100644
--- a/drivers/net/dsa/lantiq/mxl-gsw1xx.c
+++ b/drivers/net/dsa/lantiq/mxl-gsw1xx.c
@@ -503,6 +503,14 @@ 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 +544,32 @@ 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 ... 4: /* built-in PHYs */
+		__set_bit(PHY_INTERFACE_MODE_INTERNAL,
+			  config->supported_interfaces);
+		break;
+
+	case 5: /* GMII or RGMII */
+		__set_bit(PHY_INTERFACE_MODE_GMII,
+			  config->supported_interfaces);
+		fallthrough;
+
+	case 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,
@@ -768,6 +798,25 @@ 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 ... GSWIP_MAX_PORTS - 1] = -1,
+		[5] = 0,
+		[6] = 10,
+	},
+	.mii_pcdu = {
+		[0 ... GSWIP_MAX_PORTS - 1] = -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,
+};
+
 __diag_pop();
 
 /*
@@ -775,6 +824,8 @@ __diag_pop();
  * 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 },
@@ -798,5 +849,5 @@ 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 38e03c048a26c..087587f62e5e1 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 v3 3/6] net: dsa: lantiq: allow arbitrary MII registers

[Jakub Kicinski]

On Fri, 16 Jan 2026 00:07:37 +0000 Daniel Golle wrote:
> +__diag_push();
> +__diag_ignore_all("-Woverride-init",
> +		  "logic to initialize all and then override some is OK");

This seems quite unjustified to save at a glance 4 lines of code.
-- 
pw-bot: cr

Re: [PATCH net-next v3 3/6] net: dsa: lantiq: allow arbitrary MII registers

[Daniel Golle]

On Thu, Jan 15, 2026 at 07:11:08PM -0800, Jakub Kicinski wrote:
> On Fri, 16 Jan 2026 00:07:37 +0000 Daniel Golle wrote:
> > +__diag_push();
> > +__diag_ignore_all("-Woverride-init",
> > +		  "logic to initialize all and then override some is OK");
> 
> This seems quite unjustified to save at a glance 4 lines of code.

So I'll spell it out instead. I kinda like the notion of default
initializers, it's much more obviously correct and impossible to
accidentally leave anything uninitialized (or rather wrongly initialized
with 0).

In lantiq_gswip.c it would look like this then:
	.mii_cfg = {
		[0] = GSWIP_MII_CFGp(0),
		[1] = GSWIP_MII_CFGp(1),
		[2 ... 4] = -1,
		[5] = GSWIP_MII_CFGp(5),
		[6] = -1,
	},
	.mii_pcdu = {
		[0] = GSWIP_MII_PCDU0,
		[1] = GSWIP_MII_PCDU1,
		[2 ... 4] = -1,
		[5] = GSWIP_MII_PCDU5,
		[6] = -1,
	},
...
	.mii_cfg = {
		[0] = GSWIP_MII_CFGp(0),
		[1 ... 4] = -1,
		[5] = GSWIP_MII_CFGp(5),
		[6] = -1,
	},
	.mii_pcdu = {
		[0] = GSWIP_MII_PCDU0,
		[1 ... 4] = -1,
		[5] = GSWIP_MII_PCDU5,
		[6] = -1,
	},