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Squashed commit of the following:

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drivers/serial/uart_16550.c:  Add a configuration, analogous to the STM32 configuration option, to suppress the NuttX standard re-ordering for /dev/ttySN for special case of the 16550 UART.

    config/serial: UART 16550: Add CONFIG_SERIAL_UART_ARCH_MMIO option so the a memory mapped device doesn't need to provide uart_getreg() and uart_putreg() implementations.

    u16550_txempty() should check UART_LSR_TEMT to avoid some data left in the transmit FIFO
This commit is contained in:
Xiang Xiao
2018-08-26 11:17:33 -06:00
committed by Gregory Nutt
parent ea62b13fd0
commit 46e47c8dcf
5 changed files with 203 additions and 152 deletions
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arch/arm/src/moxart/moxart_16550.c
-10
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@@ -58,16 +58,6 @@
* Public Functions
****************************************************************************/
uart_datawidth_t uart_getreg(uart_addrwidth_t base, unsigned int offset)
{
return *((volatile uart_addrwidth_t *)base + offset);
}
void uart_putreg(uart_addrwidth_t base, unsigned int offset, uart_datawidth_t value)
{
*((volatile uart_addrwidth_t *)base + offset) = value;
}
void uart_decodeirq(int irq, FAR void *context)
{
int i;