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

From: Heikki Krogerus
Date: Wed Apr 10 2013 - 09:59:15 EST


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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