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ARM: meson: serial: use meson_uart_tx_empty() to wait for empty 

Use the meson_uart_tx_empty() instead of a direct read of the status
register. This is easier to read and will ensure the UART's transmit
state machine is idle when trying to update the baud rate.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Tested-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Dooks 2015-11-18 14:41:16 +00:00 committed by Greg Kroah-Hartman
parent 855ddcab35
commit f1f5c1400f
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/meson_uart.c
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@ -285,7 +285,7 @@ static void meson_uart_change_speed(struct uart_port *port, unsigned long baud)
{
u32 val;
while (!(readl(port->membase + AML_UART_STATUS) & AML_UART_TX_EMPTY))
while (!meson_uart_tx_empty(port))
cpu_relax();
val = readl(port->membase + AML_UART_REG5);