Commit f1f5c140 authored Nov 18, 2015 by Ben Dooks Committed by Greg Kroah-Hartman Dec 13, 2015

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>

parent 855ddcab

drivers/tty/serial/meson_uart.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);