diff options
| author | Ye Li <ye.li@nxp.com> | 2017-11-24 01:33:21 -0600 |
|---|---|---|
| committer | Ye Li <ye.li@nxp.com> | 2017-11-24 02:49:30 -0600 |
| commit | e31f99c05c37ac35080e415cfd8c8e2a1c96f865 (patch) | |
| tree | a5cff9d564153f2f62d839859b0d2ddab2d89126 | |
| parent | 5ad6d4cc562bac2a4ba9c05c39f039a939cbdf24 (diff) | |
MLK-16974 imx8m: Modify kernel DTB to limit USB to high-speed for mfgtool
We found USB issue when using super-speed for mfgtool, temporally work around
the problem to use high-speed only.
Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Li Jun <jun.li@nxp.com>
| -rw-r--r-- | arch/arm/cpu/armv8/imx8m/soc.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/imx8m/soc.c b/arch/arm/cpu/armv8/imx8m/soc.c index a644e37b46..79cf1ead04 100644 --- a/arch/arm/cpu/armv8/imx8m/soc.c +++ b/arch/arm/cpu/armv8/imx8m/soc.c @@ -476,6 +476,31 @@ add_status: nodes_path[i], "status"); } } + + const char *usb_dwc3_path = "/usb@38100000/dwc3"; + nodeoff = fdt_path_offset(blob, usb_dwc3_path); + if (nodeoff >= 0) { + const char *speed = "high-speed"; + printf("Found %s node\n", usb_dwc3_path); + +usb_modify_speed: + + rc = fdt_setprop(blob, nodeoff, "maximum-speed", speed, strlen(speed) + 1); + if (rc) { + if (rc == -FDT_ERR_NOSPACE) { + rc = fdt_increase_size(blob, 512); + if (!rc) + goto usb_modify_speed; + } + printf("Unable to set property %s:%s, err=%s\n", + usb_dwc3_path, "maximum-speed", fdt_strerror(rc)); + } else { + printf("Modify %s:%s = %s\n", + usb_dwc3_path, "maximum-speed", speed); + } + }else { + printf("Can't found %s node\n", usb_dwc3_path); + } } /* Disable the CPU idle for A0 chip since the HW does not support it */ |