diff options
Diffstat (limited to 'drivers/usb/cdns3/drd.c')
| -rw-r--r-- | drivers/usb/cdns3/drd.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/drd.c b/drivers/usb/cdns3/drd.c index fa5318ade3e1..55c73b1d8704 100644 --- a/drivers/usb/cdns3/drd.c +++ b/drivers/usb/cdns3/drd.c @@ -478,3 +478,18 @@ int cdns_drd_exit(struct cdns *cdns) return 0; } + + +/* Indicate the cdns3 core was power lost before */ +bool cdns_power_is_lost(struct cdns *cdns) +{ + if (cdns->version == CDNS3_CONTROLLER_V1) { + if (!(readl(&cdns->otg_v1_regs->simulate) & BIT(0))) + return true; + } else { + if (!(readl(&cdns->otg_v0_regs->simulate) & BIT(0))) + return true; + } + return false; +} +EXPORT_SYMBOL_GPL(cdns_power_is_lost); |