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charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.10.10.103] X-Mailer: Zimbra 8.8.15_GA_3968 (ZimbraWebClient - FF113 (Linux)/8.8.15_GA_3968) Thread-Topic: prueth: Adds ICSSM Ethernet driver Thread-Index: WdttyWoLoXQ9UDMeCG+9GNLwYsLE+w== X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - server.wki.vra.mybluehostin.me X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - couthit.com X-Get-Message-Sender-Via: server.wki.vra.mybluehostin.me: authenticated_id: smtp@couthit.com X-Authenticated-Sender: server.wki.vra.mybluehostin.me: smtp@couthit.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250221_043516_530523_AAFFA7F2 X-CRM114-Status: GOOD ( 12.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: nm , Vignesh Raghavendra , praneeth , edumazet , krishna , pmohan , diogo ivo , robh , javier carrasco cruz , m-karicheri2 , basharath , kuba , pabeni , devicetree , conor+dt , schnelle , mohan , richardcochran , Prajith Jayarajan , rogerq , jacob e keller , ssantosh , linux-arm-kernel , rogerq , srk , pratheesh , m-malladi , netdev , linux-kernel , danishanwar , afd , andrew+netdev , parvathi , horms , krzk+dt , davem Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, > On 2025-02-14 at 11:16:54, parvathi (parvathi@couthit.com) wrote: >> From: Roger Quadros >> >> +static int icssm_prueth_probe(struct platform_device *pdev) >> +{ >> + struct device_node *eth0_node = NULL, *eth1_node = NULL; >> + struct device_node *eth_node, *eth_ports_node; >> + enum pruss_pru_id pruss_id0, pruss_id1; >> + struct device *dev = &pdev->dev; >> + struct device_node *np; >> + struct prueth *prueth; >> + int i, ret; >> + >> + np = dev->of_node; >> + if (!np) >> + return -ENODEV; /* we don't support non DT */ >> + >> + prueth = devm_kzalloc(dev, sizeof(*prueth), GFP_KERNEL); >> + if (!prueth) >> + return -ENOMEM; >> + >> + platform_set_drvdata(pdev, prueth); >> + prueth->dev = dev; >> + prueth->fw_data = device_get_match_data(dev); >> + >> + eth_ports_node = of_get_child_by_name(np, "ethernet-ports"); >> + if (!eth_ports_node) >> + return -ENOENT; >> + >> + for_each_child_of_node(eth_ports_node, eth_node) { >> + u32 reg; >> + >> + if (strcmp(eth_node->name, "ethernet-port")) >> + continue; >> + ret = of_property_read_u32(eth_node, "reg", ®); >> + if (ret < 0) { >> + dev_err(dev, "%pOF error reading port_id %d\n", >> + eth_node, ret); >> + } >> + >> + of_node_get(eth_node); >> + >> + if (reg == 0) { >> + eth0_node = eth_node; >> + if (!of_device_is_available(eth0_node)) { >> + of_node_put(eth0_node); >> + eth0_node = NULL; >> + } >> + } else if (reg == 1) { >> + eth1_node = eth_node; >> + if (!of_device_is_available(eth1_node)) { >> + of_node_put(eth1_node); >> + eth1_node = NULL; >> + } > It depends on your DT, but is there any chance that more than once, we reach > here in else case. > { if (of_device_is_availabke(...) } ? > Yes, we will enter here in case of "EPROBE_DEFER". >> + } else { >> + dev_err(dev, "port reg should be 0 or 1\n"); >> + } >> + } >> + >> + of_node_put(eth_ports_node); >> + >> + /* At least one node must be present and available else we fail */ >> + if (!eth0_node && !eth1_node) { >> + dev_err(dev, "neither port0 nor port1 node available\n"); >> + return -ENODEV; >> + } >> + >> + if (eth0_node == eth1_node) { >> + dev_err(dev, "port0 and port1 can't have same reg\n"); >> + of_node_put(eth0_node); >> + return -ENODEV; >> + } >> + >> + prueth->eth_node[PRUETH_MAC0] = eth0_node; >> + prueth->eth_node[PRUETH_MAC1] = eth1_node; > ... > + >> + if (eth0_node) { >> + prueth->pru0 = pru_rproc_get(np, 0, &pruss_id0); >> + if (IS_ERR(prueth->pru0)) { >> + ret = PTR_ERR(prueth->pru0); >> + if (ret != -EPROBE_DEFER) >> + dev_err(dev, "unable to get PRU0: %d\n", ret); >> + goto put_pru; >> + } >> + } >> + >> + if (eth1_node) { >> + prueth->pru1 = pru_rproc_get(np, 1, &pruss_id1); >> + if (IS_ERR(prueth->pru1)) { >> + ret = PTR_ERR(prueth->pru1); >> + if (ret != -EPROBE_DEFER) >> + dev_err(dev, "unable to get PRU1: %d\n", ret); >> + goto put_pru; >> + } >> + } >> + >> + /* setup netdev interfaces */ >> + if (eth0_node) { >> + ret = icssm_prueth_netdev_init(prueth, eth0_node); >> + if (ret) { >> + if (ret != -EPROBE_DEFER) { >> + dev_err(dev, "netdev init %s failed: %d\n", >> + eth0_node->name, ret); >> + } >> + goto put_pru; >> + } >> + } >> + >> + if (eth1_node) { >> + ret = icssm_prueth_netdev_init(prueth, eth1_node); >> + if (ret) { >> + if (ret != -EPROBE_DEFER) { >> + dev_err(dev, "netdev init %s failed: %d\n", >> + eth1_node->name, ret); >> + } >> + goto netdev_exit; >> + } >> + } >> + >> + /* register the network devices */ >> + if (eth0_node) { >> + ret = register_netdev(prueth->emac[PRUETH_MAC0]->ndev); >> + if (ret) { >> + dev_err(dev, "can't register netdev for port MII0"); >> + goto netdev_exit; >> + } >> + >> + prueth->registered_netdevs[PRUETH_MAC0] = >> + prueth->emac[PRUETH_MAC0]->ndev; >> + } >> + >> + if (eth1_node) { >> + ret = register_netdev(prueth->emac[PRUETH_MAC1]->ndev); >> + if (ret) { >> + dev_err(dev, "can't register netdev for port MII1"); >> + goto netdev_unregister; >> + } >> + >> + prueth->registered_netdevs[PRUETH_MAC1] = >> + prueth->emac[PRUETH_MAC1]->ndev; >> + } >> + >> + if (eth1_node) >> + of_node_put(eth1_node); >> + if (eth0_node) >> + of_node_put(eth0_node); > nit: A function would be better than code duplication for eth0_node and > eth1_node ? It is due to possibility of using a single node. Thanks and Regards, Parvathi.