[PATCH 2/6] serial: sirf: fix the issue that HW flow control doesn't work for BT
From: Barry Song <hidden>
Date: 2015-05-14 06:45:22
Also in:
linux-serial
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
From: Qipan Li <redacted>
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 <redacted> Signed-off-by: Barry Song <redacted> --- drivers/tty/serial/sirfsoc_uart.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c
index 1d0d47f..48cceaf 100644
--- a/drivers/tty/serial/sirfsoc_uart.c
+++ b/drivers/tty/serial/sirfsoc_uart.c@@ -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)
--
2.3.5