Commit eab192ae authored May 14, 2015 by Qipan Li Committed by Greg Kroah-Hartman May 24, 2015

serial: sirf: fix the issue that HW flow control doesn't work for BT



>From HW spec, when rxfifo's data is less than AFC_RX_THD(RX threshhold), RTS
signal is active. otherwise, RTS signal is inactive.

Crrently the RX threshhold is set as zero, so RTS has no chance to be
active. This patch replaces the default 0 by a positive number.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent c1b7ac6f

drivers/tty/serial/sirfsoc_uart.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -344,7 +344,8 @@ static void sirfsoc_uart_enable_ms(struct uart_port *port)
		if (sirfport->uart_reg->uart_type == SIRF_REAL_UART) {
		wr_regl(port, ureg->sirfsoc_afc_ctrl,
		rd_regl(port, ureg->sirfsoc_afc_ctrl) \|
		SIRFUART_AFC_TX_EN \| SIRFUART_AFC_RX_EN);
		SIRFUART_AFC_TX_EN \| SIRFUART_AFC_RX_EN \|
		SIRFUART_AFC_CTRL_RX_THD);
		if (!sirfport->is_atlas7)
		wr_regl(port, ureg->sirfsoc_int_en_reg,
		rd_regl(port, ureg->sirfsoc_int_en_reg)

Admin message