From: shaochangliang <[email protected]> I2C may enable failed in D06, so retry I2C enable while enable failed.
Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: shaochangliang <[email protected]> Signed-off-by: Ming Huang <[email protected]> Signed-off-by: Heyi Guo <[email protected]> --- Silicon/Hisilicon/Library/I2CLib/I2CLib.c | 22 ++++++++++++-------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/Silicon/Hisilicon/Library/I2CLib/I2CLib.c b/Silicon/Hisilicon/Library/I2CLib/I2CLib.c index b5b388d756..ecd2f07c4d 100644 --- a/Silicon/Hisilicon/Library/I2CLib/I2CLib.c +++ b/Silicon/Hisilicon/Library/I2CLib/I2CLib.c @@ -83,6 +83,7 @@ I2C_Enable(UINT32 Socket,UINT8 Port) { I2C0_ENABLE_U I2cEnableReg; I2C0_ENABLE_STATUS_U I2cEnableStatusReg; + UINT32 ulTimeCnt = I2C_READ_TIMEOUT; UINTN Base = GetI2cBase(Socket, Port); @@ -91,16 +92,19 @@ I2C_Enable(UINT32 Socket,UINT8 Port) I2cEnableReg.bits.enable = 1; I2C_REG_WRITE(Base + I2C_ENABLE_OFFSET, I2cEnableReg.Val32); - - I2C_REG_READ(Base + I2C_ENABLE_STATUS_OFFSET, I2cEnableStatusReg.Val32); - if (1 == I2cEnableStatusReg.bits.ic_en) + do { - return EFI_SUCCESS; - } - else - { - return EFI_DEVICE_ERROR; - } + I2C_Delay(10000); + + ulTimeCnt--; + I2C_REG_READ(Base + I2C_ENABLE_STATUS_OFFSET, I2cEnableStatusReg.Val32); + if (0 == ulTimeCnt) + { + return EFI_DEVICE_ERROR; + } + }while (0 == I2cEnableStatusReg.bits.ic_en); + + return EFI_SUCCESS; } void I2C_SetTarget(UINT32 Socket,UINT8 Port,UINT32 I2cDeviceAddr) -- 2.17.0 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
