linux-kernel - [PATCH 5/6] usb: cdns3-ti: notify cdns core that hardware resets across suspend on J7200

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20231113-j7200-usb-suspend-v1-5-ad1ee714835c@bootlin.com>
Date:   Mon, 13 Nov 2023 15:27:00 +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,
        Théo Lebrun <theo.lebrun@...tlin.com>
Subject: [PATCH 5/6] usb: cdns3-ti: notify cdns core that hardware resets
 across suspend on J7200

Use the CDNS3_RESET_ON_RESUME quirk flag to inform the cdns3 core that
our J7200 USB controller will lose power during suspend. It therefore
must be reconfigured when we resume.

Signed-off-by: Théo Lebrun <theo.lebrun@...tlin.com>
---
 drivers/usb/cdns3/cdns3-ti.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c
index 50b38c4b9c87..c65714c783fb 100644
--- a/drivers/usb/cdns3/cdns3-ti.c
+++ b/drivers/usb/cdns3/cdns3-ti.c
@@ -16,6 +16,7 @@
 #include <linux/of_platform.h>
 #include <linux/pm_runtime.h>
 #include <linux/property.h>
+#include "core.h"
 
 /* USB Wrapper register offsets */
 #define USBSS_PID		0x0
@@ -127,6 +128,7 @@ static int cdns_ti_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *node = pdev->dev.of_node;
+	const struct of_dev_auxdata *auxdata;
 	struct cdns_ti *data;
 	unsigned long rate;
 	int error, i;
@@ -182,7 +184,8 @@ static int cdns_ti_probe(struct platform_device *pdev)
 
 	cdns_ti_init_hw(data);
 
-	error = of_platform_populate(node, NULL, NULL, dev);
+	auxdata = of_device_get_match_data(dev);
+	error = of_platform_populate(node, NULL, auxdata, dev);
 	if (error) {
 		dev_err(dev, "failed to create children: %d\n", error);
 		goto err;
@@ -261,8 +264,20 @@ static void cdns_ti_remove(struct platform_device *pdev)
 	platform_set_drvdata(pdev, NULL);
 }
 
+static struct cdns3_platform_data cdns_ti_j7200_pdata = {
+	.quirks = CDNS3_RESET_ON_RESUME,
+};
+
+static const struct of_dev_auxdata cdns_ti_j7200_auxdata[] = {
+	{
+		.compatible = "cdns,usb3",
+		.platform_data = &cdns_ti_j7200_pdata,
+	},
+	{},
+};
+
 static const struct of_device_id cdns_ti_of_match[] = {
-	{ .compatible = "ti,j7200-usb", },
+	{ .compatible = "ti,j7200-usb", .data = cdns_ti_j7200_auxdata, },
 	{ .compatible = "ti,j721e-usb", },
 	{ .compatible = "ti,am64-usb", },
 	{},

-- 
2.41.0