diff mbox series

[2/2] usb: cdns3-ti: Add workaround for Errata i2409

Message ID 20240514092421.20897-3-r-gunasekaran@ti.com
State Superseded
Headers show
Series TI AM64/J7: USB Errata i2409 workaround | expand

Commit Message

Ravi Gunasekaran May 14, 2024, 9:24 a.m. UTC 
From: Roger Quadros <rogerq@kernel.org>

TI USB2 PHY is known to have a lockup issue on very short
suspend intervals. Enable the Suspend Residency quirk flag to
workaround this as described in Errata i2409 [1].

[1] - https://www.ti.com/lit/er/sprz457h/sprz457h.pdf

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
---
 drivers/usb/cdns3/cdns3-ti.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/cdns3/cdns3-ti.c b/drivers/usb/cdns3/cdns3-ti.c
index 5945c4b1e11f..cfabc12ee0e3 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
@@ -85,6 +86,18 @@  static inline void cdns_ti_writel(struct cdns_ti *data, u32 offset, u32 value)
 	writel(value, data->usbss + offset);
 }
 
+static struct cdns3_platform_data cdns_ti_pdata = {
+	.quirks = CDNS3_DRD_SUSPEND_RESIDENCY_ENABLE,   /* Errata i2409 */
+};
+
+static const struct of_dev_auxdata cdns_ti_auxdata[] = {
+	{
+		.compatible = "cdns,usb3",
+		.platform_data = &cdns_ti_pdata,
+	},
+	{},
+};
+
 static int cdns_ti_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -176,7 +189,7 @@  static int cdns_ti_probe(struct platform_device *pdev)
 	reg |= USBSS_W1_PWRUP_RST;
 	cdns_ti_writel(data, USBSS_W1, reg);
 
-	error = of_platform_populate(node, NULL, NULL, dev);
+	error = of_platform_populate(node, NULL, cdns_ti_auxdata, dev);
 	if (error) {
 		dev_err(dev, "failed to create children: %d\n", error);
 		goto err;