ARM_SMMU_sCR0_CLIENTPD
reg &= ~ARM_SMMU_sCR0_CLIENTPD;
reg |= ARM_SMMU_sCR0_CLIENTPD;
arm_smmu_gr0_write(smmu, ARM_SMMU_GR0_sCR0, ARM_SMMU_sCR0_CLIENTPD);