diff options
| author | Mugunthan V N | 2018-05-18 13:15:05 +0200 |
|---|---|---|
| committer | Marek Vasut | 2018-05-18 13:23:10 +0200 |
| commit | 59592b99d884f0524a29afe4a412bbed65cfc5b7 (patch) | |
| tree | 3ef0c25eb8a6233f8a488463236d9d4d4be02833 | |
| parent | 23ba2d6372e45479106922c6241a7a09707bbe08 (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>
| -rw-r--r-- | drivers/usb/common/common.c | 29 | ||||
| -rw-r--r-- | include/linux/usb/otg.h | 9 |
2 files changed, 38 insertions, 0 deletions
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c index 17a0ab23ff5..a55def5aba6 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; +} diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 0b273d8e2e8..d2604c5cafb 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -25,4 +25,13 @@ 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 */ |