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From: Thomas Richard <thomas.richard@bootlin.com>
Date: Thu, 15 Feb 2024 16:17:54 +0100
Subject: [PATCH v3 09/18] phy: ti: phy-j721e-wiz: add resume support
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Message-Id: <20240102-j7200-pcie-s2r-v3-9-5c2e4a3fac1f@bootlin.com>
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To: Linus Walleij <linus.walleij@linaro.org>, 
 Bartosz Golaszewski <brgl@bgdev.pl>, Andy Shevchenko <andy@kernel.org>, 
 Tony Lindgren <tony@atomide.com>, 
 Haojian Zhuang <haojian.zhuang@linaro.org>, Vignesh R <vigneshr@ti.com>, 
 Aaro Koskinen <aaro.koskinen@iki.fi>, 
 Janusz Krzysztofik <jmkrzyszt@gmail.com>, 
 Andi Shyti <andi.shyti@kernel.org>, Peter Rosin <peda@axentia.se>, 
 Vinod Koul <vkoul@kernel.org>, Kishon Vijay Abraham I <kishon@kernel.org>, 
 Philipp Zabel <p.zabel@pengutronix.de>, 
 Lorenzo Pieralisi <lpieralisi@kernel.org>, 
 =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= <kw@linux.com>, 
 Rob Herring <robh@kernel.org>, Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, 
 linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, 
 linux-i2c@vger.kernel.org, linux-phy@lists.infradead.org, 
 linux-pci@vger.kernel.org, gregory.clement@bootlin.com, 
 theo.lebrun@bootlin.com, thomas.petazzoni@bootlin.com, u-kumar1@ti.com, 
 Thomas Richard <thomas.richard@bootlin.com>

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 | 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 45c5a4e9cd12..cde38182e34c 100644
--- a/drivers/phy/ti/phy-j721e-wiz.c
+++ b/drivers/phy/ti/phy-j721e-wiz.c
@@ -1660,12 +1660,41 @@ 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