MSM_UART_SR_TX_READY
while (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY))
while (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY))
while (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY))
if (!(msm_read(port, MSM_UART_SR) & MSM_UART_SR_TX_READY))