PCH_R_BAR_HSTS
uint8_t hsts = pchsmbus_read8(pch, PCH_R_BAR_HSTS);
pchsmbus_write8(pch, PCH_R_BAR_HSTS, status);
sts = pchsmbus_read8(pch, PCH_R_BAR_HSTS);
uint8_t status = pchsmbus_read8(pch, PCH_R_BAR_HSTS);
pchsmbus_write8(pch, PCH_R_BAR_HSTS, PCH_HSTS_CLEAR_PRE);