diff mbox series

[06/14] phy: ti: phy-j721e-wiz: add resume support

Message ID 20240102-j7200-pcie-s2r-v1-6-84e55da52400@bootlin.com
State New
Headers show
Series Add suspend to ram support for PCIe on J7200 | expand

Commit Message

Thomas Richard Jan. 15, 2024, 4:14 p.m. UTC 
Add resume support.
It has been tested on J7200 SR1.0 and SR2.0.

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

Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
---
 drivers/phy/ti/phy-j721e-wiz.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
diff mbox series

Patch

diff --git a/drivers/phy/ti/phy-j721e-wiz.c b/drivers/phy/ti/phy-j721e-wiz.c
index 09f7edf16562..fac7070a9d6b 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -1666,12 +1666,51 @@  static void wiz_remove(struct platform_device *pdev)
 	pm_runtime_disable(dev);
 }
 
+#ifdef CONFIG_PM
+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 const struct dev_pm_ops wiz_pm_ops = {
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, wiz_resume_noirq)
+};
+#endif
+
 static struct platform_driver wiz_driver = {
 	.probe		= wiz_probe,
 	.remove_new	= wiz_remove,
 	.driver		= {
 		.name	= "wiz",
 		.of_match_table = wiz_id_table,
+		.pm	= pm_ptr(&wiz_pm_ops),
 	},
 };
 module_platform_driver(wiz_driver);