MdeModulePkg/SdMmcPciHcDxe: Add function to start SD clock
In SD card voltage switch flow we used to redo the entire internal clock setup after voltage switch. Since internal clock has already been setup this is wasting time on polling the internal clock stable. This commit changes it to only start the SD clock. Cc: Hao A Wu <hao.a.wu@intel.com> Cc: Marcin Wojtas <mw@semihalf.com> Cc: Zhichao Gao <zhichao.gao@intel.com> Cc: Liming Gao <liming.gao@intel.com> Signed-off-by: Mateusz Albecki <mateusz.albecki@intel.com> Tested-by: Marcin Wojtas <mw@semihalf.com> Tested-by: Hao A Wu <hao.a.wu@intel.com> Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
This commit is contained in:
committed by
mergify[bot]
parent
49accdedf9
commit
f68cb23c14
@@ -758,6 +758,30 @@ SdMmcHcStopClock (
|
||||
return Status;
|
||||
}
|
||||
|
||||
/**
|
||||
Start the SD clock.
|
||||
|
||||
@param[in] PciIo The PCI IO protocol instance.
|
||||
@param[in] Slot The slot number.
|
||||
|
||||
@retval EFI_SUCCESS Succeeded to start the SD clock.
|
||||
@rtval Others Failed to start the SD clock.
|
||||
**/
|
||||
EFI_STATUS
|
||||
SdMmcHcStartSdClock (
|
||||
IN EFI_PCI_IO_PROTOCOL *PciIo,
|
||||
IN UINT8 Slot
|
||||
)
|
||||
{
|
||||
UINT16 ClockCtrl;
|
||||
|
||||
//
|
||||
// Set SD Clock Enable in the Clock Control register to 1
|
||||
//
|
||||
ClockCtrl = BIT2;
|
||||
return SdMmcHcOrMmio (PciIo, Slot, SD_MMC_HC_CLOCK_CTRL, sizeof (ClockCtrl), &ClockCtrl);
|
||||
}
|
||||
|
||||
/**
|
||||
SD/MMC card clock supply.
|
||||
|
||||
@@ -879,11 +903,10 @@ SdMmcHcClockSupply (
|
||||
return Status;
|
||||
}
|
||||
|
||||
//
|
||||
// Set SD Clock Enable in the Clock Control register to 1
|
||||
//
|
||||
ClockCtrl = BIT2;
|
||||
Status = SdMmcHcOrMmio (PciIo, Slot, SD_MMC_HC_CLOCK_CTRL, sizeof (ClockCtrl), &ClockCtrl);
|
||||
Status = SdMmcHcStartSdClock (PciIo, Slot);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return Status;
|
||||
}
|
||||
|
||||
//
|
||||
// We don't notify the platform on first time setup to avoid changing
|
||||
|
Reference in New Issue
Block a user