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Message-ID: <20230724112934.2637802-11-danishanwar@ti.com>
Date: Mon, 24 Jul 2023 16:59:34 +0530
From: MD Danish Anwar <danishanwar@...com>
To: Randy Dunlap <rdunlap@...radead.org>,
Roger Quadros <rogerq@...nel.org>,
Simon Horman <simon.horman@...igine.com>,
Vignesh Raghavendra <vigneshr@...com>,
Andrew Lunn <andrew@...n.ch>,
Richard Cochran <richardcochran@...il.com>,
Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Rob Herring <robh+dt@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
"David S. Miller" <davem@...emloft.net>,
MD Danish Anwar <danishanwar@...com>
CC: <nm@...com>, <srk@...com>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>, <netdev@...r.kernel.org>,
<linux-omap@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>
Subject: [PATCH v11 10/10] net: ti: icssg-prueth: Add Power management support
Add suspend / resume APIs to support power management in ICSSG ethernet
driver.
Signed-off-by: MD Danish Anwar <danishanwar@...com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
drivers/net/ethernet/ti/icssg_prueth.c | 57 ++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/drivers/net/ethernet/ti/icssg_prueth.c b/drivers/net/ethernet/ti/icssg_prueth.c
index a34e29ed3351..53d93a33c64d 100644
--- a/drivers/net/ethernet/ti/icssg_prueth.c
+++ b/drivers/net/ethernet/ti/icssg_prueth.c
@@ -1835,6 +1835,62 @@ static int prueth_remove(struct platform_device *pdev)
return 0;
}
+#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,
@@ -1852,6 +1908,7 @@ 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);
--
2.34.1
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