From: Mugunthan V N mugunthanvnm@ti.com
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: Vignesh R vigneshr@ti.com Reviewed-by: Simon Glass sjg@chromium.org --- drivers/usb/common/common.c | 29 +++++++++++++++++++++++++++++ include/linux/usb/otg.h | 9 +++++++++ scripts/Makefile.spl | 1 + 3 files changed, 39 insertions(+)
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c index 35c2dc18d955..c11689dc36fa 100644 --- a/drivers/usb/common/common.c +++ b/drivers/usb/common/common.c @@ -10,6 +10,7 @@ #include <common.h> #include <libfdt.h> #include <linux/usb/otg.h> +#include <linux/usb/ch9.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -38,3 +39,31 @@ 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) { + error("usb dr_mode not found\n"); + return USB_DR_MODE_UNKNOWN; + } + + for (i = 0; i < ARRAY_SIZE(speed_names); i++) + if (!strcmp(max_speed, speed_names[i])) + return i; + + return USB_SPEED_UNKNOWN; +} diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 8f8ac6aeefe3..b61ef19b22f3 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -26,4 +26,13 @@ enum usb_dr_mode { */ enum usb_dr_mode usb_get_dr_mode(int node);
+/** + * usb_get_maximum_speed() - Get maximum speed for given device + * @node: Node offset to the given device + * + * The function gets phy interface string from property 'maximum-speed', + * and returns the correspondig enum usb_device_speed + */ +enum usb_device_speed usb_get_maximum_speed(int node); + #endif /* __LINUX_USB_OTG_H */ diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl index ac3c2c7f1342..bffea085b329 100644 --- a/scripts/Makefile.spl +++ b/scripts/Makefile.spl @@ -78,6 +78,7 @@ endif
libs-$(CONFIG_SPL_LIBDISK_SUPPORT) += disk/ libs-y += drivers/ +libs-y += drivers/usb/common/ libs-$(CONFIG_SPL_USB_GADGET_SUPPORT) += drivers/usb/dwc3/ libs-y += dts/ libs-y += fs/