linux-kernel - [PATCH] phy: ti: gmii-sel: add resume support

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Message-Id: <20240125171754.773909-1-thomas.richard@bootlin.com>
Date: Thu, 25 Jan 2024 18:17:54 +0100
From: Thomas Richard <thomas.richard@...tlin.com>
To: vkoul@...nel.org,
	kishon@...nel.org
Cc: linux-phy@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	gregory.clement@...tlin.com,
	thomas.petazzoni@...tlin.com,
	theo.lebrun@...tlin.com,
	u-kumar1@...com,
	Thomas Richard <thomas.richard@...tlin.com>
Subject: [PATCH] phy: ti: gmii-sel: add resume support

The resume callback restores the submode of each PHY.

It uses the submode stored in struct phy_gmii_sel_phy_priv (variable
phy_if_mode). The submode was saved by the set_mode PHY operation.

Signed-off-by: Thomas Richard <thomas.richard@...tlin.com>
---
 drivers/phy/ti/phy-gmii-sel.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/phy/ti/phy-gmii-sel.c b/drivers/phy/ti/phy-gmii-sel.c
index 555b323f45da..c62790937313 100644
--- a/drivers/phy/ti/phy-gmii-sel.c
+++ b/drivers/phy/ti/phy-gmii-sel.c
@@ -491,11 +491,35 @@ static int phy_gmii_sel_probe(struct platform_device *pdev)
 	return 0;
 }
 
+static int phy_gmii_sel_resume_noirq(struct device *dev)
+{
+	struct phy_gmii_sel_priv *priv = dev_get_drvdata(dev);
+	struct phy_gmii_sel_phy_priv *if_phys = priv->if_phys;
+	int ret, i;
+
+	for (i = 0; i < priv->num_ports; i++) {
+		if (if_phys[i].phy_if_mode) {
+			ret = phy_gmii_sel_mode(if_phys[i].if_phy,
+						PHY_MODE_ETHERNET, if_phys[i].phy_if_mode);
+			if (ret) {
+				dev_err(dev, "port%u: restore mode fail %d\n",
+					if_phys[i].if_phy->id, ret);
+				return ret;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static DEFINE_NOIRQ_DEV_PM_OPS(phy_gmii_sel_pm_ops, NULL, phy_gmii_sel_resume_noirq);
+
 static struct platform_driver phy_gmii_sel_driver = {
 	.probe		= phy_gmii_sel_probe,
 	.driver		= {
 		.name	= "phy-gmii-sel",
 		.of_match_table = phy_gmii_sel_id_table,
+		.pm = pm_sleep_ptr(&phy_gmii_sel_pm_ops),
 	},
 };
 module_platform_driver(phy_gmii_sel_driver);
-- 
2.39.2