PL011: Fix a bug in the UART FIFO polling

Before attempting to write a character, the PL011 driver polls
the PL011_UARTFR_TXFF bit to know whether the UART FIFO is full.
However, the comparison with 1 was incorrect because
PL011_UARTFR_TXFF is not at bit 0. This patch fixes it.

Change-Id: I4b53c28612f58581c6189ed6c794ed02cc2a89e3
This commit is contained in:
Sandrine Bailleux 2014-06-02 13:52:38 +01:00
parent de116940dd
commit c6af727f3c
1 changed files with 4 additions and 2 deletions

View File

@ -65,8 +65,10 @@ void console_init(unsigned long base_addr)
}
#define WAIT_UNTIL_UART_FREE(base) while ((pl011_read_fr(base)\
& PL011_UARTFR_TXFF) == 1)
#define WAIT_UNTIL_UART_FREE(base) \
while ((pl011_read_fr(base) & PL011_UARTFR_TXFF)) \
continue
int console_putc(int c)
{
assert(uart_base);