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authorMugunthan V N <mugunthanvnm@ti.com>2018-05-18 13:15:05 +0200
committerMarek Vasut <marex@denx.de>2018-05-18 13:23:10 +0200
commit59592b99d884f0524a29afe4a412bbed65cfc5b7 (patch)
tree3ef0c25eb8a6233f8a488463236d9d4d4be02833 /drivers/usb/common/common.c
parent23ba2d6372e45479106922c6241a7a09707bbe08 (diff)
usb: common: add support to get maximum speed from dt
Add support to get maximum speed from dt so that usb drivers makes use of it for DT parsing. Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> (rebase and fix errors) Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/usb/common/common.c')
-rw-r--r--drivers/usb/common/common.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index 17a0ab23ff..a55def5aba 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -9,6 +9,7 @@
#include <common.h>
#include <linux/libfdt.h>
#include <linux/usb/otg.h>
+#include <linux/usb/ch9.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -37,3 +38,31 @@ enum usb_dr_mode usb_get_dr_mode(int node)
return USB_DR_MODE_UNKNOWN;
}
+
+static const char *const speed_names[] = {
+ [USB_SPEED_UNKNOWN] = "UNKNOWN",
+ [USB_SPEED_LOW] = "low-speed",
+ [USB_SPEED_FULL] = "full-speed",
+ [USB_SPEED_HIGH] = "high-speed",
+ [USB_SPEED_WIRELESS] = "wireless",
+ [USB_SPEED_SUPER] = "super-speed",
+};
+
+enum usb_device_speed usb_get_maximum_speed(int node)
+{
+ const void *fdt = gd->fdt_blob;
+ const char *max_speed;
+ int i;
+
+ max_speed = fdt_getprop(fdt, node, "maximum-speed", NULL);
+ if (!max_speed) {
+ pr_err("usb maximum-speed not found\n");
+ return USB_SPEED_UNKNOWN;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(speed_names); i++)
+ if (!strcmp(max_speed, speed_names[i]))
+ return i;
+
+ return USB_SPEED_UNKNOWN;
+}