[PATCH v2 07/15] phy: ti: phy-j721e-wiz: add resume support

[Thomas Richard]

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

Based on the work of Théo Lebrun <theo.lebrun at bootlin.com>

Signed-off-by: Thomas Richard <thomas.richard at bootlin.com>
---
 drivers/phy/ti/phy-j721e-wiz.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index 09f7edf16562..163ac3e95ddb 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -1666,12 +1666,47 @@ 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);
+
+	ret = wiz_clock_init(wiz, node, false);
+	if (ret < 0) {
+		dev_warn(dev, "Failed to initialize clocks\n");
+		goto err_get_sync;
+	}
+
+	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);
+
+err_get_sync:
+
+	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