Set musb config->maximum_speed based on the dts setting to control musb
speed.
By default musb works in high-speed mode. Adding
maximum-speed = "full-speed";
to dts usb node will force musb to full-speed mode.
Signed-off-by: Bin Liu <b-liu@xxxxxx>
---
drivers/usb/musb/musb_dsps.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 65d931a..da656d4 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -744,6 +744,19 @@ static int dsps_create_musb_pdev(struct dsps_glue *glue,
if (!ret && val)
config->multipoint = true;
+ config->maximum_speed = of_usb_get_maximum_speed(dn);
+ switch (config->maximum_speed) {
+ case USB_SPEED_LOW:
+ case USB_SPEED_FULL:
+ break;
+ case USB_SPEED_SUPER:
+ dev_warn(dev, "ignore incorrect maximum_speed "
+ "(super-speed) setting in dts");
+ /* fall through */
+ default:
+ config->maximum_speed = USB_SPEED_HIGH;
+ }
+
ret = platform_device_add_data(musb, &pdata, sizeof(pdata));
if (ret) {
dev_err(dev, "failed to add platform_data\n");
--
1.8.4
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