Commit 32943c7d81ebd70ddc1916a2523fbff512733f93
1 parent
e18f601c5c
Exists in
smarc_8mq_lf_v2020.04
and in
4 other branches
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> (cherry picked from commit e31f99c05c37ac35080e415cfd8c8e2a1c96f865) (cherry picked from commit 6134c7ee3967fe303bdb2bb7e981ac698b909c5d) (cherry picked from commit 46f606811b9adfb5bff35ef487de31bae8109801)
Showing 1 changed file with 26 additions and 0 deletions Side-by-side Diff
arch/arm/mach-imx/imx8m/soc.c
| ... | ... | @@ -384,6 +384,32 @@ |
| 384 | 384 | } |
| 385 | 385 | } |
| 386 | 386 | |
| 387 | + const char *usb_dwc3_path = "/usb@38100000/dwc3"; | |
| 388 | + nodeoff = fdt_path_offset(blob, usb_dwc3_path); | |
| 389 | + if (nodeoff >= 0) { | |
| 390 | + const char *speed = "high-speed"; | |
| 391 | + printf("Found %s node\n", usb_dwc3_path); | |
| 392 | + | |
| 393 | +usb_modify_speed: | |
| 394 | + | |
| 395 | + rc = fdt_setprop(blob, nodeoff, "maximum-speed", speed, strlen(speed) + 1); | |
| 396 | + if (rc) { | |
| 397 | + if (rc == -FDT_ERR_NOSPACE) { | |
| 398 | + rc = fdt_increase_size(blob, 512); | |
| 399 | + if (!rc) | |
| 400 | + goto usb_modify_speed; | |
| 401 | + } | |
| 402 | + printf("Unable to set property %s:%s, err=%s\n", | |
| 403 | + usb_dwc3_path, "maximum-speed", fdt_strerror(rc)); | |
| 404 | + } else { | |
| 405 | + printf("Modify %s:%s = %s\n", | |
| 406 | + usb_dwc3_path, "maximum-speed", speed); | |
| 407 | + } | |
| 408 | + }else { | |
| 409 | + printf("Can't found %s node\n", usb_dwc3_path); | |
| 410 | + } | |
| 411 | + } | |
| 412 | + | |
| 387 | 413 | /* Disable the CPU idle for A0 chip since the HW does not support it */ |
| 388 | 414 | if (is_soc_rev(CHIP_REV_1_0)) { |
| 389 | 415 | static const char * const nodes_path[] = { |