pmuisp_write
pmuisp_write(0x18000, is, REG_PMU_ISP_ARM_OPTION);
pmuisp_write(0x1, is, REG_PMU_ISP_ARM_CONFIGURATION);
pmuisp_write(0x10000, is, REG_PMU_ISP_ARM_OPTION);
pmuisp_write(0x0, is, REG_PMU_ISP_ARM_CONFIGURATION);