Merge branch 'add-support-for-qsgmii-mode-for-j721e-cpsw9g-to-am65-cpsw-driver'

Siddharth Vadapalli says:

====================
Add support for QSGMII mode for J721e CPSW9G to am65-cpsw driver

Add compatible to am65-cpsw driver for J721e CPSW9G, which contains 8
external ports and 1 internal host port.

Add support to power on and power off the SERDES PHY which is used by the
CPSW MAC.

=========
Changelog
=========
v5:
https://lore.kernel.org/r/20221109042203.375042-1-s-vadapalli@ti.com/
v4:
https://lore.kernel.org/r/20221108080606.124596-1-s-vadapalli@ti.com/
v3:
https://lore.kernel.org/r/20221026090957.180592-1-s-vadapalli@ti.com/
v2:
https://lore.kernel.org/r/20221018085810.151327-1-s-vadapalli@ti.com/
v1:
https://lore.kernel.org/r/20220914095053.189851-1-s-vadapalli@ti.com/
====================

Link: https://lore.kernel.org/r/20230104103432.1126403-1-s-vadapalli@ti.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

3 files changed, 106 insertions, 4 deletions

diff --git a/Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml b/Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
index 821974815dec..900063411a20 100644
--- a/Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
+++ b/Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
@@ -57,6 +57,7 @@ properties:
       - ti,am654-cpsw-nuss
       - ti,j7200-cpswxg-nuss
       - ti,j721e-cpsw-nuss
+      - ti,j721e-cpswxg-nuss
       - ti,am642-cpsw-nuss
 
   reg:
@@ -111,7 +112,7 @@ properties:
         const: 0
 
     patternProperties:
-      "^port@[1-4]$":
+      "^port@[1-8]$":
         type: object
         description: CPSWxG NUSS external ports
 
@@ -121,7 +122,7 @@ properties:
         properties:
           reg:
             minimum: 1
-            maximum: 4
+            maximum: 8
             description: CPSW port number
 
           phys:
@@ -186,12 +187,36 @@ allOf:
         properties:
           compatible:
             contains:
-              const: ti,j7200-cpswxg-nuss
+              const: ti,j721e-cpswxg-nuss
     then:
       properties:
         ethernet-ports:
           patternProperties:
-            "^port@[3-4]$": false
+            "^port@[5-8]$": false
+            "^port@[1-4]$":
+              properties:
+                reg:
+                  minimum: 1
+                  maximum: 4
+
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - ti,j721e-cpswxg-nuss
+                - ti,j7200-cpswxg-nuss
+    then:
+      properties:
+        ethernet-ports:
+          patternProperties:
+            "^port@[3-8]$": false
+            "^port@[1-2]$":
+              properties:
+                reg:
+                  minimum: 1
+                  maximum: 2
 
 additionalProperties: false
 
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index ecbde83b5243..5cac98284184 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -1416,6 +1416,68 @@ static const struct net_device_ops am65_cpsw_nuss_netdev_ops = {
 	.ndo_setup_tc           = am65_cpsw_qos_ndo_setup_tc,
 };
 
+static void am65_cpsw_disable_phy(struct phy *phy)
+{
+	phy_power_off(phy);
+	phy_exit(phy);
+}
+
+static int am65_cpsw_enable_phy(struct phy *phy)
+{
+	int ret;
+
+	ret = phy_init(phy);
+	if (ret < 0)
+		return ret;
+
+	ret = phy_power_on(phy);
+	if (ret < 0) {
+		phy_exit(phy);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void am65_cpsw_disable_serdes_phy(struct am65_cpsw_common *common)
+{
+	struct am65_cpsw_port *port;
+	struct phy *phy;
+	int i;
+
+	for (i = 0; i < common->port_num; i++) {
+		port = &common->ports[i];
+		phy = port->slave.serdes_phy;
+		if (phy)
+			am65_cpsw_disable_phy(phy);
+	}
+}
+
+static int am65_cpsw_init_serdes_phy(struct device *dev, struct device_node *port_np,
+				     struct am65_cpsw_port *port)
+{
+	const char *name = "serdes-phy";
+	struct phy *phy;
+	int ret;
+
+	phy = devm_of_phy_get(dev, port_np, name);
+	if (PTR_ERR(phy) == -ENODEV)
+		return 0;
+
+	/* Serdes PHY exists. Store it. */
+	port->slave.serdes_phy = phy;
+
+	ret =  am65_cpsw_enable_phy(phy);
+	if (ret < 0)
+		goto err_phy;
+
+	return 0;
+
+err_phy:
+	devm_phy_put(dev, phy);
+	return ret;
+}
+
 static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned int mode,
 				      const struct phylink_link_state *state)
 {
@@ -1959,6 +2021,11 @@ static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
 			goto of_node_put;
 		}
 
+		/* Initialize the Serdes PHY for the port */
+		ret = am65_cpsw_init_serdes_phy(dev, port_np, port);
+		if (ret)
+			return ret;
+
 		port->slave.mac_only =
 				of_property_read_bool(port_np, "ti,mac-only");
 
@@ -2684,11 +2751,19 @@ static const struct am65_cpsw_pdata j7200_cpswxg_pdata = {
 	.extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII),
 };
 
+static const struct am65_cpsw_pdata j721e_cpswxg_pdata = {
+	.quirks = 0,
+	.ale_dev_id = "am64-cpswxg",
+	.fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
+	.extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII),
+};
+
 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
 	{ .compatible = "ti,am654-cpsw-nuss", .data = &am65x_sr1_0},
 	{ .compatible = "ti,j721e-cpsw-nuss", .data = &j721e_pdata},
 	{ .compatible = "ti,am642-cpsw-nuss", .data = &am64x_cpswxg_pdata},
 	{ .compatible = "ti,j7200-cpswxg-nuss", .data = &j7200_cpswxg_pdata},
+	{ .compatible = "ti,j721e-cpswxg-nuss", .data = &j721e_cpswxg_pdata},
 	{ /* sentinel */ },
 };
 MODULE_DEVICE_TABLE(of, am65_cpsw_nuss_of_mtable);
@@ -2870,6 +2945,7 @@ static int am65_cpsw_nuss_remove(struct platform_device *pdev)
 	 */
 	am65_cpsw_nuss_cleanup_ndev(common);
 	am65_cpsw_nuss_phylink_cleanup(common);
+	am65_cpsw_disable_serdes_phy(common);
 
 	of_platform_device_destroy(common->mdio_dev, NULL);
 
diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.h b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
index 4b75620f8d28..ed26768a6e51 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.h
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.h
@@ -32,6 +32,7 @@ struct am65_cpsw_slave_data {
 	struct device_node		*phy_node;
 	phy_interface_t			phy_if;
 	struct phy			*ifphy;
+	struct phy			*serdes_phy;
 	bool				rx_pause;
 	bool				tx_pause;
 	u8				mac_addr[ETH_ALEN];