From 41932b9b8adc14b5650e8909f66d5bd08619b81c Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Wed, 9 Sep 2015 11:56:18 -0500 Subject: [PATCH] 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 Signed-off-by: Felipe Balbi --- 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 84512d1d5eee..c8b2ec9a79d6 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -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"); -- 2.20.1