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Miller" , MD Danish Anwar CC: , , , , , , Subject: [PATCH v13 10/10] net: ti: icssg-prueth: Add Power management support Date: Tue, 1 Aug 2023 14:44:28 +0530 Message-ID: <20230801091428.1359979-11-danishanwar@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230801091428.1359979-1-danishanwar@ti.com> References: <20230801091428.1359979-1-danishanwar@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230801_040249_497660_622FFC32 X-CRM114-Status: GOOD ( 17.81 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add suspend / resume APIs to support power management in ICSSG ethernet driver. Reviewed-by: Andrew Lunn Signed-off-by: MD Danish Anwar --- drivers/net/ethernet/ti/icssg/icssg_prueth.c | 57 ++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index 80721d82f6c5..47b941fb0198 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -1813,6 +1813,62 @@ static void prueth_remove(struct platform_device *pdev) prueth_put_cores(prueth, ICSS_SLICE0); } +#ifdef CONFIG_PM_SLEEP +static int prueth_suspend(struct device *dev) +{ + struct prueth *prueth = dev_get_drvdata(dev); + struct net_device *ndev; + int i, ret; + + for (i = 0; i < PRUETH_NUM_MACS; i++) { + ndev = prueth->registered_netdevs[i]; + + if (!ndev) + continue; + + if (netif_running(ndev)) { + netif_device_detach(ndev); + ret = emac_ndo_stop(ndev); + if (ret < 0) { + netdev_err(ndev, "failed to stop: %d", ret); + return ret; + } + } + } + + return 0; +} + +static int prueth_resume(struct device *dev) +{ + struct prueth *prueth = dev_get_drvdata(dev); + struct net_device *ndev; + int i, ret; + + for (i = 0; i < PRUETH_NUM_MACS; i++) { + ndev = prueth->registered_netdevs[i]; + + if (!ndev) + continue; + + if (netif_running(ndev)) { + ret = emac_ndo_open(ndev); + if (ret < 0) { + netdev_err(ndev, "failed to start: %d", ret); + return ret; + } + netif_device_attach(ndev); + } + } + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops prueth_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(prueth_suspend, prueth_resume) +}; + static const struct prueth_pdata am654_icssg_pdata = { .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE, .quirk_10m_link_issue = 1, @@ -1830,6 +1886,7 @@ static struct platform_driver prueth_driver = { .driver = { .name = "icssg-prueth", .of_match_table = prueth_dt_match, + .pm = &prueth_dev_pm_ops, }, }; module_platform_driver(prueth_driver);