[PATCH 8/9] serial: 8250_dw: Set port capabilities based on CPR register

[Heikki Krogerus]

The Designware UART has an optional support for 16750
compatible Auto Flow Control. This will enable it based on
the AFCE bit in Component Parameter Register.

Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
---
 drivers/tty/serial/8250/8250_dw.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 09aaea2..b7c7d6a 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -221,7 +221,11 @@ static void dw8250_setup_port(struct uart_8250_port *up)
 		p->flags |= UPF_FIXED_TYPE;
 		p->fifosize = DW_UART_CPR_FIFO_SIZE(reg);
 		up->tx_loadsz = p->fifosize;
+		up->capabilities = UART_CAP_FIFO;
 	}
+
+	if (reg & DW_UART_CPR_AFCE_MODE)
+		up->capabilities |= UART_CAP_AFE;
 }
 
 static int dw8250_probe(struct platform_device *pdev)
-- 
1.7.10.4

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