Re: [RFC PATCH net-next 5/6] microchip: lan865x: add driver support for Microchip's LAN865X MACPHY

[<Parthiban.Veerasooran@microchip.com>]

Hi William,

On 11/09/23 6:47 pm, Ziyang Xuan (William) wrote:
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> 
>> The LAN8650/1 is designed to conform to the OPEN Alliance 10BASE‑T1x
>> MAC‑PHY Serial Interface specification, Version 1.1. The IEEE Clause 4
>> MAC integration provides the low pin count standard SPI interface to any
>> microcontroller therefore providing Ethernet functionality without
>> requiring MAC integration within the microcontroller. The LAN8650/1
>> operates as an SPI client supporting SCLK clock rates up to a maximum of
>> 25 MHz. This SPI interface supports the transfer of both data (Ethernet
>> frames) and control (register access).
>>
>> By default, the chunk data payload is 64 bytes in size. A smaller payload
>> data size of 32 bytes is also supported and may be configured in the
>> Chunk Payload Size (CPS) field of the Configuration 0 (OA_CONFIG0)
>> register. Changing the chunk payload size requires the LAN8650/1 be reset
>> and shall not be done during normal operation.
>>
>> The Ethernet Media Access Controller (MAC) module implements a 10 Mbps
>> half duplex Ethernet MAC, compatible with the IEEE 802.3 standard.
>> 10BASE-T1S physical layer transceiver integrated into the LAN8650/1. The
>> PHY and MAC are connected via an internal Media Independent Interface
>> (MII).
>>
>> Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
>> ---
>>   MAINTAINERS                              |   6 +
>>   drivers/net/ethernet/microchip/Kconfig   |  10 +
>>   drivers/net/ethernet/microchip/Makefile  |   3 +
>>   drivers/net/ethernet/microchip/lan865x.c | 589 +++++++++++++++++++++++
>>   4 files changed, 608 insertions(+)
>>   create mode 100644 drivers/net/ethernet/microchip/lan865x.c
>>
>> diff --git a/MAINTAINERS b/MAINTAINERS
>> index c54454c7e7a1..666c042a15b2 100644
>> --- a/MAINTAINERS
>> +++ b/MAINTAINERS
>> @@ -13879,6 +13879,12 @@ L:   netdev@vger.kernel.org
>>   S:   Maintained
>>   F:   drivers/net/ethernet/microchip/lan743x_*
>>
>> +MICROCHIP LAN8650/1 10BASE-T1S MACPHY ETHERNET DRIVER
>> +M:   Parthiban Veerasooran <parthiban.veerasooran@microchip.com>
>> +L:   netdev@vger.kernel.org
>> +S:   Maintained
>> +F:   drivers/net/ethernet/microchip/lan865x.c
>> +
>>   MICROCHIP LAN87xx/LAN937x T1 PHY DRIVER
>>   M:   Arun Ramadoss <arun.ramadoss@microchip.com>
>>   R:   UNGLinuxDriver@microchip.com
>> diff --git a/drivers/net/ethernet/microchip/Kconfig b/drivers/net/ethernet/microchip/Kconfig
>> index 329e374b9539..d99be51b99f1 100644
>> --- a/drivers/net/ethernet/microchip/Kconfig
>> +++ b/drivers/net/ethernet/microchip/Kconfig
>> @@ -59,4 +59,14 @@ source "drivers/net/ethernet/microchip/lan966x/Kconfig"
>>   source "drivers/net/ethernet/microchip/sparx5/Kconfig"
>>   source "drivers/net/ethernet/microchip/vcap/Kconfig"
>>
>> +config LAN865X
>> +     tristate "LAN865x support"
>> +     depends on SPI
>> +     help
>> +               Support for the Microchip LAN8650/1 Rev.B0 Ethernet chip. It uses OPEN
>> +       Alliance 10BASE-T1x Serial Interface specification.
>> +
>> +               To compile this driver as a module, choose M here. The module will be
>> +          called lan865x.
>> +
>>   endif # NET_VENDOR_MICROCHIP
>> diff --git a/drivers/net/ethernet/microchip/Makefile b/drivers/net/ethernet/microchip/Makefile
>> index bbd349264e6f..315e850b2b26 100644
>> --- a/drivers/net/ethernet/microchip/Makefile
>> +++ b/drivers/net/ethernet/microchip/Makefile
>> @@ -12,3 +12,6 @@ lan743x-objs := lan743x_main.o lan743x_ethtool.o lan743x_ptp.o
>>   obj-$(CONFIG_LAN966X_SWITCH) += lan966x/
>>   obj-$(CONFIG_SPARX5_SWITCH) += sparx5/
>>   obj-$(CONFIG_VCAP) += vcap/
>> +
>> +obj-$(CONFIG_LAN865X) += lan865x_t1s.o
>> +lan865x_t1s-objs := lan865x.o ../oa_tc6.o
>> diff --git a/drivers/net/ethernet/microchip/lan865x.c b/drivers/net/ethernet/microchip/lan865x.c
>> new file mode 100644
>> index 000000000000..3c8ebf4c258f
>> --- /dev/null
>> +++ b/drivers/net/ethernet/microchip/lan865x.c
>> @@ -0,0 +1,589 @@
>> +// SPDX-License-Identifier: GPL-2.0+
>> +/*
>> + * Microchip's LAN865x 10BASE-T1S MAC-PHY driver
>> + *
>> + * Author: Parthiban Veerasooran <parthiban.veerasooran@microchip.com>
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/kernel.h>
>> +#include <linux/etherdevice.h>
>> +#include <linux/mdio.h>
>> +#include <linux/phy.h>
>> +#include <linux/of.h>
>> +#include <linux/oa_tc6.h>
>> +
>> +#define DRV_NAME             "lan865x"
>> +#define DRV_VERSION          "0.1"
>> +
>> +#define REG_STDR_RESET               0x00000003
>> +#define REG_MAC_ADDR_BO              0x00010022
>> +#define REG_MAC_ADDR_L               0x00010024
>> +#define REG_MAC_ADDR_H               0x00010025
>> +#define REG_MAC_NW_CTRL         0x00010000
>> +#define REG_MAC_NW_CONFIG    0x00010001
>> +#define REG_MAC_HASHL                0x00010020
>> +#define REG_MAC_HASHH                0x00010021
>> +#define REG_MAC_ADDR_BO              0x00010022
>> +#define REG_MAC_ADDR_L               0x00010024
>> +#define REG_MAC_ADDR_H               0x00010025
>> +
>> +#define CCS_Q0_TX_CFG                0x000A0081
>> +#define CCS_Q0_RX_CFG                0x000A0082
>> +
>> +/* Buffer configuration for 32-bytes chunk payload */
>> +#define CCS_Q0_TX_CFG_32     0x70000000
>> +#define CCS_Q0_RX_CFG_32     0x30000C00
>> +
>> +#define NW_RX_STATUS         BIT(2)
>> +#define NW_TX_STATUS         BIT(3)
>> +#define NW_DISABLE           0x0
>> +
>> +#define MAC_PROMISCUOUS_MODE BIT(4)
>> +#define MAC_MULTICAST_MODE   BIT(6)
>> +#define MAC_UNICAST_MODE     BIT(7)
>> +
>> +#define TX_TIMEOUT           (4 * HZ)
>> +#define LAN865X_MSG_DEFAULT  \
>> +     (NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN | NETIF_MSG_LINK)
>> +
>> +struct lan865x_priv {
>> +     struct net_device *netdev;
>> +     struct spi_device *spi;
>> +     struct oa_tc6 *tc6;
>> +     struct mii_bus *mdiobus;
>> +     struct phy_device *phydev;
>> +     struct device *dev;
>> +     u32 msg_enable;
>> +     bool txcte;
>> +     bool rxcte;
>> +     u32 cps;
>> +     bool protected;
>> +};
>> +
>> +static void lan865x_handle_link_change(struct net_device *netdev)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +
>> +     phy_print_status(priv->phydev);
>> +}
>> +
>> +static int lan865x_mdiobus_read(struct mii_bus *bus, int phy_id, int idx)
>> +{
>> +     struct lan865x_priv *priv = bus->priv;
>> +     u32 regval;
>> +     bool ret;
>> +
>> +     ret = oa_tc6_read_register(priv->tc6, 0xFF00 | (idx & 0xFF), &regval, 1);
>> +     if (ret)
>> +             return -ENODEV;
>> +
>> +     return regval;
>> +}
>> +
>> +static int lan865x_mdiobus_write(struct mii_bus *bus, int phy_id, int idx,
>> +                              u16 regval)
>> +{
>> +     struct lan865x_priv *priv = bus->priv;
>> +     u32 value = regval;
>> +     bool ret;
>> +
>> +     ret = oa_tc6_write_register(priv->tc6, 0xFF00 | (idx & 0xFF), &value, 1);
>> +     if (ret)
>> +             return -ENODEV;
>> +
>> +     return 0;
>> +}
>> +
>> +static int lan865x_phy_init(struct lan865x_priv *priv)
>> +{
>> +     int ret;
>> +
>> +     priv->mdiobus = mdiobus_alloc();
>> +     if (!priv->mdiobus) {
>> +             netdev_err(priv->netdev, "MDIO bus alloc failed\n");
>> +             return -ENODEV;
>> +     }
>> +
>> +     priv->mdiobus->phy_mask = ~(u32)BIT(1);
>> +     priv->mdiobus->priv = priv;
>> +     priv->mdiobus->read = lan865x_mdiobus_read;
>> +     priv->mdiobus->write = lan865x_mdiobus_write;
>> +     priv->mdiobus->name = "lan865x-mdiobus";
>> +     priv->mdiobus->parent = priv->dev;
>> +
>> +     snprintf(priv->mdiobus->id, ARRAY_SIZE(priv->mdiobus->id),
>> +              "%s", dev_name(&priv->spi->dev));
>> +
>> +     ret = mdiobus_register(priv->mdiobus);
>> +     if (ret) {
>> +             netdev_err(priv->netdev, "Could not register MDIO bus\n");
>> +             mdiobus_free(priv->mdiobus);
>> +             return ret;
>> +     }
>> +     priv->phydev = phy_find_first(priv->mdiobus);
>> +     if (!priv->phydev) {
>> +             netdev_err(priv->netdev, "No PHY found\n");
>> +             mdiobus_unregister(priv->mdiobus);
>> +             mdiobus_free(priv->mdiobus);
>> +             return -ENODEV;
>> +     }
>> +     priv->phydev->is_internal = true;
>> +     ret = phy_connect_direct(priv->netdev, priv->phydev,
>> +                              &lan865x_handle_link_change,
>> +                              PHY_INTERFACE_MODE_INTERNAL);
>> +     if (ret) {
>> +             netdev_err(priv->netdev, "Can't attach PHY to %s\n", priv->mdiobus->id);
>> +             return ret;
> Here return directly without above resources recycle. Please check if it is correct.
> If it is needed, it is recommended to use error labels to avoid duplicate code.
Ok noted. Will correct it in the next revision.
> 
>> +     }
>> +     phy_attached_info(priv->phydev);
>> +     return ret;
>> +}
>> +
>> +static int lan865x_set_hw_macaddr(struct net_device *netdev)
>> +{
>> +     u32 regval;
>> +     bool ret;
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +     const u8 *mac = netdev->dev_addr;
>> +
>> +     ret = oa_tc6_read_register(priv->tc6, REG_MAC_NW_CTRL, &regval, 1);
>> +     if (ret)
>> +             goto error_mac;
>> +     if ((regval & NW_TX_STATUS) | (regval & NW_RX_STATUS)) {
>> +             if (netif_msg_drv(priv))
>> +                     netdev_warn(netdev, "Hardware must be disabled for MAC setting\n");
>> +             return -EBUSY;
>> +     }
>> +     /* MAC address setting */
>> +     regval = (mac[3] << 24) | (mac[2] << 16) | (mac[1] << 8) |
>> +             mac[0];
>> +     ret = oa_tc6_write_register(priv->tc6, REG_MAC_ADDR_L, &regval, 1);
>> +     if (ret)
>> +             goto error_mac;
>> +
>> +     regval = (mac[5] << 8) | mac[4];
>> +     ret = oa_tc6_write_register(priv->tc6, REG_MAC_ADDR_H, &regval, 1);
>> +     if (ret)
>> +             goto error_mac;
>> +
>> +     regval = (mac[5] << 24) | (mac[4] << 16) |
>> +             (mac[3] << 8) | mac[2];
>> +     ret = oa_tc6_write_register(priv->tc6, REG_MAC_ADDR_BO, &regval, 1);
>> +     if (ret)
>> +             goto error_mac;
>> +
>> +     return 0;
>> +
>> +error_mac:
>> +     return -ENODEV;
> 
> No resource recycle, goto and error label are not needed. What's more,
> the same label corresponds to different errors.
Ah yes, will correct it in the next revision.
> 
>> +}
>> +
>> +static int
>> +lan865x_set_link_ksettings(struct net_device *netdev,
>> +                        const struct ethtool_link_ksettings *cmd)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +     int ret = 0;
>> +
>> +     if (cmd->base.autoneg != AUTONEG_DISABLE ||
>> +         cmd->base.speed != SPEED_10 || cmd->base.duplex != DUPLEX_HALF) {
>> +             if (netif_msg_link(priv))
>> +                     netdev_warn(netdev, "Unsupported link setting");
>> +             ret = -EOPNOTSUPP;
>> +     } else {
>> +             if (netif_msg_link(priv))
>> +                     netdev_warn(netdev, "Hardware must be disabled to set link mode");
>> +             ret = -EBUSY;
>> +     }
>> +     return ret;
>> +}
>> +
>> +static int
>> +lan865x_get_link_ksettings(struct net_device *netdev,
>> +                        struct ethtool_link_ksettings *cmd)
>> +{
>> +     ethtool_link_ksettings_zero_link_mode(cmd, supported);
>> +     ethtool_link_ksettings_add_link_mode(cmd, supported, 10baseT_Half);
>> +     ethtool_link_ksettings_add_link_mode(cmd, supported, TP);
>> +
>> +     cmd->base.speed = SPEED_10;
>> +     cmd->base.duplex = DUPLEX_HALF;
>> +     cmd->base.port  = PORT_TP;
>> +     cmd->base.autoneg = AUTONEG_DISABLE;
>> +
>> +     return 0;
>> +}
>> +
>> +static void lan865x_set_msglevel(struct net_device *netdev, u32 val)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +
>> +     priv->msg_enable = val;
>> +}
>> +
>> +static u32 lan865x_get_msglevel(struct net_device *netdev)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +
>> +     return priv->msg_enable;
>> +}
>> +
>> +static void
>> +lan865x_get_drvinfo(struct net_device *netdev, struct ethtool_drvinfo *info)
>> +{
>> +     strscpy(info->driver, DRV_NAME, sizeof(info->driver));
>> +     strscpy(info->version, DRV_VERSION, sizeof(info->version));
>> +     strscpy(info->bus_info,
>> +             dev_name(netdev->dev.parent), sizeof(info->bus_info));
>> +}
>> +
>> +static const struct ethtool_ops lan865x_ethtool_ops = {
>> +     .get_drvinfo    = lan865x_get_drvinfo,
>> +     .get_msglevel   = lan865x_get_msglevel,
>> +     .set_msglevel   = lan865x_set_msglevel,
>> +     .get_link_ksettings = lan865x_get_link_ksettings,
>> +     .set_link_ksettings = lan865x_set_link_ksettings,
>> +};
>> +
>> +static void lan865x_tx_timeout(struct net_device *netdev, unsigned int txqueue)
>> +{
>> +     netdev->stats.tx_errors++;
>> +}
>> +
>> +static int lan865x_set_mac_address(struct net_device *netdev, void *addr)
>> +{
>> +     struct sockaddr *address = addr;
>> +
>> +     if (netif_running(netdev))
>> +             return -EBUSY;
>> +     if (!is_valid_ether_addr(address->sa_data))
>> +             return -EADDRNOTAVAIL;
>> +
>> +     eth_hw_addr_set(netdev, address->sa_data);
>> +     return lan865x_set_hw_macaddr(netdev);
>> +}
>> +
>> +static u32 lan865x_hash(u8 addr[ETH_ALEN])
>> +{
>> +     return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
>> +}
>> +
>> +static void lan865x_set_multicast_list(struct net_device *netdev)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +     u32 regval = 0;
>> +
>> +     if (netdev->flags & IFF_PROMISC) {
>> +             /* Enabling promiscuous mode */
>> +             regval |= MAC_PROMISCUOUS_MODE;
>> +             regval &= (~MAC_MULTICAST_MODE);
>> +             regval &= (~MAC_UNICAST_MODE);
>> +     } else if (netdev->flags & IFF_ALLMULTI) {
>> +             /* Enabling all multicast mode */
>> +             regval &= (~MAC_PROMISCUOUS_MODE);
>> +             regval |= MAC_MULTICAST_MODE;
>> +             regval &= (~MAC_UNICAST_MODE);
>> +     } else if (!netdev_mc_empty(netdev)) {
>> +             /* Enabling specific multicast addresses */
>> +             struct netdev_hw_addr *ha;
>> +             u32 hash_lo = 0;
>> +             u32 hash_hi = 0;
>> +
>> +             netdev_for_each_mc_addr(ha, netdev) {
>> +                     u32 bit_num = lan865x_hash(ha->addr);
>> +                     u32 mask = 1 << (bit_num & 0x1f);
>> +
>> +                     if (bit_num & 0x20)
>> +                             hash_hi |= mask;
>> +                     else
>> +                             hash_lo |= mask;
>> +             }
>> +             if (oa_tc6_write_register(priv->tc6, REG_MAC_HASHH, &hash_hi, 1)) {
>> +                     if (netif_msg_timer(priv))
>> +                             netdev_err(netdev, "Failed to write reg_hashh");
>> +                     return;
>> +             }
>> +             if (oa_tc6_write_register(priv->tc6, REG_MAC_HASHL, &hash_lo, 1)) {
>> +                     if (netif_msg_timer(priv))
>> +                             netdev_err(netdev, "Failed to write reg_hashl");
>> +                     return;
>> +             }
>> +             regval &= (~MAC_PROMISCUOUS_MODE);
>> +             regval &= (~MAC_MULTICAST_MODE);
>> +             regval |= MAC_UNICAST_MODE;
>> +     } else {
>> +             /* enabling local mac address only */
>> +             if (oa_tc6_write_register(priv->tc6, REG_MAC_HASHH, &regval, 1)) {
>> +                     if (netif_msg_timer(priv))
>> +                             netdev_err(netdev, "Failed to write reg_hashh");
>> +                     return;
>> +             }
>> +             if (oa_tc6_write_register(priv->tc6, REG_MAC_HASHL, &regval, 1)) {
>> +                     if (netif_msg_timer(priv))
>> +                             netdev_err(netdev, "Failed to write reg_hashl");
>> +                     return;
>> +             }
>> +     }
>> +     if (oa_tc6_write_register(priv->tc6, REG_MAC_NW_CONFIG, &regval, 1)) {
>> +             if (netif_msg_timer(priv))
>> +                     netdev_err(netdev, "Failed to enable promiscuous mode");
>> +     }
>> +}
>> +
>> +static netdev_tx_t lan865x_send_packet(struct sk_buff *skb,
>> +                                    struct net_device *netdev)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +
>> +     return oa_tc6_send_eth_pkt(priv->tc6, skb);
>> +}
>> +
>> +static int lan865x_hw_disable(struct lan865x_priv *priv)
>> +{
>> +     u32 regval = NW_DISABLE;
>> +
>> +     if (oa_tc6_write_register(priv->tc6, REG_MAC_NW_CTRL, &regval, 1))
>> +             return -ENODEV;
>> +
>> +     return 0;
>> +}
>> +
>> +static int lan865x_net_close(struct net_device *netdev)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +     int ret;
>> +
>> +     netif_stop_queue(netdev);
>> +     ret = lan865x_hw_disable(priv);
>> +     if (ret) {
>> +             if (netif_msg_ifup(priv))
>> +                     netdev_err(netdev, "Failed to disable the hardware\n");
>> +             return ret;
>> +     }
>> +
>> +     return 0;
>> +}
>> +
>> +static int lan865x_hw_enable(struct lan865x_priv *priv)
>> +{
>> +     u32 regval = NW_TX_STATUS | NW_RX_STATUS;
>> +
>> +     if (oa_tc6_write_register(priv->tc6, REG_MAC_NW_CTRL, &regval, 1))
>> +             return -ENODEV;
>> +
>> +     return 0;
>> +}
>> +
>> +static int lan865x_net_open(struct net_device *netdev)
>> +{
>> +     struct lan865x_priv *priv = netdev_priv(netdev);
>> +     int ret;
>> +
>> +     if (!is_valid_ether_addr(netdev->dev_addr)) {
>> +             if (netif_msg_ifup(priv))
>> +                     netdev_err(netdev, "Invalid MAC address %pm", netdev->dev_addr);
>> +             return -EADDRNOTAVAIL;
>> +     }
>> +     if (lan865x_hw_disable(priv)) {
>> +             if (netif_msg_ifup(priv))
>> +                     netdev_err(netdev, "Failed to disable the hardware\n");
>> +             return -ENODEV;
>> +     }
>> +     ret = lan865x_set_hw_macaddr(netdev);
>> +     if (ret != 0)
>> +             return ret;
>> +
>> +     if (lan865x_hw_enable(priv) != 0) {
>> +             if (netif_msg_ifup(priv))
>> +                     netdev_err(netdev, "Failed to enable hardware\n");
>> +             return -ENODEV;
>> +     }
>> +     netif_start_queue(netdev);
>> +
>> +     return 0;
>> +}
>> +
>> +static const struct net_device_ops lan865x_netdev_ops = {
>> +     .ndo_open               = lan865x_net_open,
>> +     .ndo_stop               = lan865x_net_close,
>> +     .ndo_start_xmit         = lan865x_send_packet,
>> +     .ndo_set_rx_mode        = lan865x_set_multicast_list,
>> +     .ndo_set_mac_address    = lan865x_set_mac_address,
>> +     .ndo_tx_timeout         = lan865x_tx_timeout,
>> +     .ndo_validate_addr      = eth_validate_addr,
>> +};
>> +
>> +static int lan865x_get_dt_data(struct lan865x_priv *priv)
>> +{
>> +     struct spi_device *spi = priv->spi;
>> +     int ret;
>> +
>> +     if (of_property_present(spi->dev.of_node, "oa-chunk-size")) {
>> +             ret = of_property_read_u32(spi->dev.of_node, "oa-chunk-size",
>> +                                        &priv->cps);
>> +             if (ret < 0)
>> +                     return ret;
>> +     } else {
>> +             priv->cps = 64;
>> +             dev_info(&spi->dev, "Property oa-chunk-size is not found in dt and proceeding with the size 64\n");
>> +     }
>> +
>> +     if (of_property_present(spi->dev.of_node, "oa-tx-cut-through"))
>> +             priv->txcte = true;
>> +     else
>> +             dev_info(&spi->dev, "Property oa-tx-cut-through is not found in dt and proceeding with tx store and forward mode\n");
>> +
>> +     if (of_property_present(spi->dev.of_node, "oa-rx-cut-through"))
>> +             priv->rxcte = true;
>> +     else
>> +             dev_info(&spi->dev, "Property oa-rx-cut-through is not found in dt and proceeding with rx store and forward mode\n");
>> +
>> +     if (of_property_present(spi->dev.of_node, "oa-protected"))
>> +             priv->protected = true;
>> +     else
>> +             dev_info(&spi->dev, "Property oa-protected is not found in dt and proceeding with protection enabled\n");
>> +
>> +     return 0;
>> +}
>> +
>> +static int lan865x_probe(struct spi_device *spi)
>> +{
>> +     struct net_device *netdev;
>> +     struct lan865x_priv *priv;
>> +     u32 regval;
>> +     int ret;
>> +
>> +     netdev = alloc_etherdev(sizeof(struct lan865x_priv));
>> +     if (!netdev)
>> +             return -ENOMEM;
>> +
>> +     priv = netdev_priv(netdev);
>> +     priv->netdev = netdev;
>> +     priv->spi = spi;
>> +     priv->msg_enable = 0;
>> +     spi_set_drvdata(spi, priv);
>> +     SET_NETDEV_DEV(netdev, &spi->dev);
>> +
>> +     ret = lan865x_get_dt_data(priv);
>> +     if (ret)
>> +             return ret;
> 
> Has not free allocated netdev.
Ok noted, will correct it in the next revision.
> 
>> +
>> +     spi->rt = true;
>> +     spi_setup(spi);
>> +
>> +     priv->tc6 = oa_tc6_init(spi, netdev);
>> +     if (!priv->tc6) {
>> +             ret = -ENOMEM;
>> +             goto error_oa_tc6_init;
>> +     }
>> +
>> +     if (priv->cps == 32) {
>> +             regval = CCS_Q0_TX_CFG_32;
>> +             ret = oa_tc6_write_register(priv->tc6, CCS_Q0_TX_CFG, &regval, 1);
>> +             if (ret)
>> +                     return ret;
> 
> No resources recycle. Please check.
Ok noted, will correct it in the next revision.
> 
>> +
>> +             regval = CCS_Q0_RX_CFG_32;
>> +             ret = oa_tc6_write_register(priv->tc6, CCS_Q0_RX_CFG, &regval, 1);
>> +             if (ret)
>> +                     return ret;
> 
> No resources recycle. Please check.
Ok noted, will correct it in the next revision.

Best Regards,
Parthiban V
> 
>> +     }
>> +
>> +     if (oa_tc6_configure(priv->tc6, priv->cps, priv->protected, priv->txcte,
>> +                          priv->rxcte))
>> +             goto err_macphy_config;
>> +
>> +     ret = lan865x_phy_init(priv);
>> +     if (ret)
>> +             goto error_phy;
>> +
>> +     if (device_get_ethdev_address(&spi->dev, netdev))
>> +             eth_hw_addr_random(netdev);
>> +
>> +     ret = lan865x_set_hw_macaddr(netdev);
>> +     if (ret) {
>> +             if (netif_msg_probe(priv))
>> +                     dev_err(&spi->dev, "Failed to configure MAC");
>> +             goto error_set_mac;
>> +     }
>> +
>> +     netdev->if_port = IF_PORT_10BASET;
>> +     netdev->irq = spi->irq;
>> +     netdev->netdev_ops = &lan865x_netdev_ops;
>> +     netdev->watchdog_timeo = TX_TIMEOUT;
>> +     netdev->ethtool_ops = &lan865x_ethtool_ops;
>> +     ret = register_netdev(netdev);
>> +     if (ret) {
>> +             if (netif_msg_probe(priv))
>> +                     dev_err(&spi->dev, "Register netdev failed (ret = %d)",
>> +                             ret);
>> +             goto error_netdev_register;
>> +     }
>> +
>> +     phy_start(priv->phydev);
>> +     return 0;
>> +
>> +error_netdev_register:
>> +error_set_mac:
>> +     phy_disconnect(priv->phydev);
>> +     mdiobus_unregister(priv->mdiobus);
>> +     mdiobus_free(priv->mdiobus);
>> +error_phy:
>> +err_macphy_config:
>> +     oa_tc6_deinit(priv->tc6);
>> +error_oa_tc6_init:
>> +     free_netdev(priv->netdev);
>> +     return ret;
>> +}
>> +
>> +static void lan865x_remove(struct spi_device *spi)
>> +{
>> +     struct lan865x_priv *priv = spi_get_drvdata(spi);
>> +
>> +     phy_stop(priv->phydev);
>> +     phy_disconnect(priv->phydev);
>> +     mdiobus_unregister(priv->mdiobus);
>> +     mdiobus_free(priv->mdiobus);
>> +     unregister_netdev(priv->netdev);
>> +     if (oa_tc6_deinit(priv->tc6))
>> +             dev_err(&spi->dev, "Failed to deinitialize oa tc6\n");
>> +     free_netdev(priv->netdev);
>> +}
>> +
>> +#ifdef CONFIG_OF
>> +static const struct of_device_id lan865x_dt_ids[] = {
>> +     { .compatible = "microchip,lan865x" },
>> +     { /* Sentinel */ }
>> +};
>> +MODULE_DEVICE_TABLE(of, lan865x_dt_ids);
>> +#endif
>> +
>> +#ifdef CONFIG_ACPI
>> +static const struct acpi_device_id lan865x_acpi_ids[] = {
>> +     { .id = "LAN865X",
>> +     },
>> +     {},
>> +};
>> +MODULE_DEVICE_TABLE(acpi, lan865x_acpi_ids);
>> +#endif
>> +
>> +static struct spi_driver lan865x_driver = {
>> +     .driver = {
>> +             .name = DRV_NAME,
>> +#ifdef CONFIG_OF
>> +             .of_match_table = lan865x_dt_ids,
>> +#endif
>> +#ifdef CONFIG_ACPI
>> +                .acpi_match_table = ACPI_PTR(lan865x_acpi_ids),
>> +#endif
>> +      },
>> +     .probe = lan865x_probe,
>> +     .remove = lan865x_remove,
>> +};
>> +module_spi_driver(lan865x_driver);
>> +
>> +MODULE_DESCRIPTION(DRV_NAME " 10Base-T1S MACPHY Ethernet Driver");
>> +MODULE_AUTHOR("Parthiban Veerasooran <parthiban.veerasooran@microchip.com>");
>> +MODULE_LICENSE("GPL");
>> +MODULE_ALIAS("spi:" DRV_NAME);
>>