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>
---
Change log:
----------
Changes since v2:
----------------
* No change

Changes since v1:
----------------
* No change

v2: https://lore.kernel.org/all/20240516042845.31211-1-r-gunasekaran@ti.com/
v1: https://lore.kernel.org/all/20240514092421.20897-1-r-gunasekaran@ti.com/#t

 drivers/usb/cdns3/cdns3-ti.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

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;
-- 
2.17.1

On 24-05-16 10:15:37, Ravi Gunasekaran wrote:
> 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>
> ---
> Change log:
> ----------
> Changes since v2:
> ----------------
> * No change
> 
> Changes since v1:
> ----------------
> * No change
> 
> v2: https://lore.kernel.org/all/20240516042845.31211-1-r-gunasekaran@ti.com/
> v1: https://lore.kernel.org/all/20240514092421.20897-1-r-gunasekaran@ti.com/#t
> 
>  drivers/usb/cdns3/cdns3-ti.c | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)
> 
> 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;
> -- 
> 2.17.1
> 

Acked-by: Peter Chen <peter.chen@kernel.org>

-- 

Thanks,
Peter Chen