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usb: musb: dsps: control musb speed based on dts setting 

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@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Bin Liu 2015-09-09 11:56:18 -05:00 committed by Felipe Balbi
parent 9b7537642c
commit 41932b9b8a
1 changed files with 13 additions and 0 deletions
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13
drivers/usb/musb/musb_dsps.c
View File

@ -747,6 +747,19 @@ 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");