linux-kernel - [PATCH 3/8] phy: ti: phy-j721e-wiz: add resume support

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Date: Tue, 16 Apr 2024 14:52:32 +0200
From: Thomas Richard <thomas.richard@...tlin.com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 gregory.clement@...tlin.com, theo.lebrun@...tlin.com, 
 thomas.petazzoni@...tlin.com, u-kumar1@...com, 
 Thomas Richard <thomas.richard@...tlin.com>
Subject: [PATCH 3/8] phy: ti: phy-j721e-wiz: add resume support

Add resume support.
It has been tested on J7200 SR1.0 and SR2.0.

Co-developed-by: Théo Lebrun <theo.lebrun@...tlin.com>
Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
Signed-off-by: Thomas Richard <thomas.richard@...tlin.com>
---
 drivers/phy/ti/phy-j721e-wiz.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index ba670109e7ad..7f626c597025 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -1659,12 +1659,41 @@ static void wiz_remove(struct platform_device *pdev)
 	pm_runtime_disable(dev);
 }
 
+static int wiz_resume_noirq(struct device *dev)
+{
+	struct device_node *node = dev->of_node;
+	struct wiz *wiz = dev_get_drvdata(dev);
+	int ret;
+
+	/* Enable supplemental Control override if available */
+	if (wiz->sup_legacy_clk_override)
+		regmap_field_write(wiz->sup_legacy_clk_override, 1);
+
+	wiz_clock_init(wiz);
+
+	ret = wiz_init(wiz);
+	if (ret) {
+		dev_err(dev, "WIZ initialization failed\n");
+		goto err_wiz_init;
+	}
+
+	return 0;
+
+err_wiz_init:
+	wiz_clock_cleanup(wiz, node);
+
+	return ret;
+}
+
+static DEFINE_NOIRQ_DEV_PM_OPS(wiz_pm_ops, NULL, wiz_resume_noirq);
+
 static struct platform_driver wiz_driver = {
 	.probe		= wiz_probe,
 	.remove_new	= wiz_remove,
 	.driver		= {
 		.name	= "wiz",
 		.of_match_table = wiz_id_table,
+		.pm	= pm_sleep_ptr(&wiz_pm_ops),
 	},
 };
 module_platform_driver(wiz_driver);

-- 
2.39.2