COMMAND6x_CLEAR
if (tsllux_write1(sc, TSL256x_REG_CONTROL | COMMAND6x_CLEAR,
if (tsllux_write1(sc, TSL256x_REG_INTERRUPT | COMMAND6x_CLEAR, 0)) {
#define REGMASK6x (COMMAND6x_REGMASK | COMMAND6x_CLEAR)