smmu_readl
value = smmu_readl(smmu, group->reg);
value = smmu_readl(smmu, client->regs.smmu.reg);
smmu_readl(smmu, SMMU_PTB_ASID);
value = smmu_readl(smmu, group->reg);
value = smmu_readl(smmu, client->regs.smmu.reg);
value = smmu_readl(smmu, group->reg);
value = smmu_readl(smmu, client->regs.smmu.reg);