From eab192ae56fd52416af485e3d7ba2c6982200d71 Mon Sep 17 00:00:00 2001 From: Qipan Li Date: Thu, 14 May 2015 06:45:22 +0000 Subject: [PATCH] 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 Signed-off-by: Barry Song Signed-off-by: Greg Kroah-Hartman --- 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 1d0d47f2a8c2..48cceaf5338a 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) -- 2.20.1