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

Théo Lebrun
2023-11-13T14:27:07Z

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@bootlin.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