UART01x_FR_DSR
if (delta & UART01x_FR_DSR)
if (status & UART01x_FR_DSR)
.fr_dsr = UART01x_FR_DSR,
.fr_dsr = UART01x_FR_DSR,
.fr_dsr = UART01x_FR_DSR,
.fr_dsr = UART01x_FR_DSR,
#define UART01x_FR_MODEM_ANY (UART01x_FR_DCD | UART01x_FR_DSR | UART01x_FR_CTS)