linux-kernel - [PATCH v2 2/7] usb: cdns3-ti: remove runtime PM

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Message-Id: <20231120-j7200-usb-suspend-v2-2-038c7e4a3df4@bootlin.com>
Date:   Mon, 20 Nov 2023 18:06:02 +0100
From:   Théo Lebrun <theo.lebrun@...tlin.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Roger Quadros <rogerq@...nel.org>,
        Peter Chen <peter.chen@...nel.org>,
        Pawel Laszczak <pawell@...ence.com>,
        Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>
Cc:     linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        "Thomas Petazzoni thomas.petazzoni"@bootlin.com,
        Grégory Clement <gregory.clement@...tlin.com>,
        Théo Lebrun <theo.lebrun@...tlin.com>
Subject: [PATCH v2 2/7] usb: cdns3-ti: remove runtime PM

The driver does not use RPM. It enables it & gets a reference at probe.
It then undoes that on probe error or at remove.

Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
---
 drivers/usb/cdns3/cdns3-ti.c | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c
index 5945c4b1e11f..dc1594acdcee 100644
--- a/drivers/usb/cdns3/cdns3-ti.c
+++ b/drivers/usb/cdns3/cdns3-ti.c
@@ -135,13 +135,6 @@ static int cdns_ti_probe(struct platform_device *pdev)
 
 	rate_code = i;
 
-	pm_runtime_enable(dev);
-	error = pm_runtime_get_sync(dev);
-	if (error < 0) {
-		dev_err(dev, "pm_runtime_get_sync failed: %d\n", error);
-		goto err;
-	}
-
 	/* assert RESET */
 	reg = cdns_ti_readl(data, USBSS_W1);
 	reg &= ~USBSS_W1_PWRUP_RST;
@@ -179,16 +172,10 @@ static int cdns_ti_probe(struct platform_device *pdev)
 	error = of_platform_populate(node, NULL, NULL, dev);
 	if (error) {
 		dev_err(dev, "failed to create children: %d\n", error);
-		goto err;
+		return error;
 	}
 
 	return 0;
-
-err:
-	pm_runtime_put_sync(data->dev);
-	pm_runtime_disable(data->dev);
-
-	return error;
 }
 
 static int cdns_ti_remove_core(struct device *dev, void *c)
@@ -205,8 +192,6 @@ static void cdns_ti_remove(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 
 	device_for_each_child(dev, NULL, cdns_ti_remove_core);
-	pm_runtime_put_sync(dev);
-	pm_runtime_disable(dev);
 
 	platform_set_drvdata(pdev, NULL);
 }

-- 
2.42.0