linux-kernel - [PATCH net-next 7/7] net: lan743x: Register the platform device for sfp pluggable module

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Message-ID: <20230721060019.2737-8-Raju.Lakkaraju@microchip.com>
Date:   Fri, 21 Jul 2023 11:30:19 +0530
From:   Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
To:     <netdev@...r.kernel.org>
CC:     <davem@...emloft.net>, <kuba@...nel.org>,
        <linux-kernel@...r.kernel.org>, <bryan.whitehead@...rochip.com>,
        <andrew@...n.ch>, <linux@...linux.org.uk>,
        <UNGLinuxDriver@...rochip.com>
Subject: [PATCH net-next 7/7] net: lan743x: Register the platform device for sfp pluggable module

Add support for SFP pluggable module as platform device handle the GPIO
input and output signals and i2c bus access the SFP EEPROM data.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@...rochip.com>
---
 drivers/net/ethernet/microchip/lan743x_main.c | 39 +++++++++++++++++++
 drivers/net/ethernet/microchip/lan743x_main.h |  1 +
 2 files changed, 40 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 9b6326d035a8..2dd0965982fb 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -17,6 +17,7 @@
 #include <linux/crc16.h>
 #include <linux/gpio/machine.h>
 #include <linux/i2c.h>
+#include <linux/platform_device.h>
 #include "../../../misc/mchp_pci1xxxx/mchp_pci1xxxx_gp.h"
 #include "lan743x_main.h"
 #include "lan743x_ethtool.h"
@@ -3228,6 +3229,31 @@ static int lan743x_swnodes_register(struct lan743x_adapter *adapter)
 	return software_node_register_node_group(nodes->group);
 }
 
+static int lan743x_sfp_register(struct lan743x_adapter *adapter)
+{
+	struct pci_dev *pdev = adapter->pdev;
+	struct platform_device_info sfp_info;
+	struct platform_device *sfp_dev;
+
+	memset(&sfp_info, 0, sizeof(sfp_info));
+	sfp_info.parent = &adapter->pdev->dev;
+	sfp_info.fwnode = software_node_fwnode(adapter->nodes->group[SWNODE_SFP]);
+	sfp_info.name = "sfp";
+	sfp_info.id = (pdev->bus->number << 8) | pdev->devfn;
+	sfp_dev = platform_device_register_full(&sfp_info);
+	if (IS_ERR(sfp_dev)) {
+		netif_err(adapter, drv, adapter->netdev,
+			  "Failed to register SFP device\n");
+		return PTR_ERR(sfp_dev);
+	}
+
+	adapter->sfp_dev = sfp_dev;
+	netif_dbg(adapter, drv, adapter->netdev,
+		  "SFP platform device registered");
+
+	return 0;
+}
+
 static void lan743x_mac_cfg_update(struct lan743x_adapter *adapter, bool link,
 				   int speed, const unsigned long *advertise)
 {
@@ -3715,6 +3741,9 @@ static void lan743x_hardware_cleanup(struct lan743x_adapter *adapter)
 	if (adapter->phylink)
 		phylink_destroy(adapter->phylink);
 
+	if (adapter->sfp_dev)
+		platform_device_unregister(adapter->sfp_dev);
+
 	if (adapter->nodes)
 		software_node_unregister_node_group(adapter->nodes->group);
 
@@ -3942,6 +3971,16 @@ static int lan743x_pcidev_probe(struct pci_dev *pdev,
 	adapter->sgmii_lsd = LINK_2500_MASTER;
 
 	if (adapter->is_sfp_support_en) {
+		adapter->i2c_adap->dev.fwnode =
+			software_node_fwnode(adapter->nodes->group[SWNODE_I2C]);
+
+		ret = lan743x_sfp_register(adapter);
+		if (ret < 0) {
+			netif_err(adapter, probe, netdev,
+				  "failed to sfp register (%d)\n", ret);
+			goto cleanup_hardware;
+		}
+
 		ret = lan743x_phylink_create(adapter->netdev);
 		if (ret) {
 			netif_err(adapter, probe, netdev,
diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 6b94d0e93cbb..d23cf1ca888c 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -1083,6 +1083,7 @@ struct lan743x_adapter {
 	struct i2c_adapter	*i2c_adap;
 	struct phylink		*phylink;
 	struct phylink_config	phylink_config;
+	struct platform_device	*sfp_dev;
 };
 
 #define LAN743X_COMPONENT_FLAG_RX(channel)  BIT(20 + (channel))
-- 
2.25.1