Messages in this thread Patch in this message | | | From | Heikki Krogerus <> | Subject | [PATCHv2 3/3] serial: of_serial: Handle auto-flow-control property | Date | Mon, 25 Mar 2013 15:51:15 +0200 |
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Automatic Flow Control capability is not tied to this property. This is only one way of detecting it. The property is limited to be used only with 8250 driver.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> --- .../devicetree/bindings/tty/serial/of-serial.txt | 3 +++ drivers/tty/serial/of_serial.c | 13 ++++++++++--- 2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt index c13f0ce..1928a3e 100644 --- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt @@ -34,6 +34,9 @@ Optional properties: - no-loopback-test: set to indicate that the port does not implements loopback test mode - fifo-size: the fifo size of the UART. +- auto-flow-control: one way to enable automatic flow control support. The + driver is allowed to detect support for the capability even without this + property. Example: diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index 267711b..39c7ea4 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -14,7 +14,6 @@ #include <linux/slab.h> #include <linux/delay.h> #include <linux/serial_core.h> -#include <linux/serial_8250.h> #include <linux/serial_reg.h> #include <linux/of_address.h> #include <linux/of_irq.h> @@ -22,6 +21,8 @@ #include <linux/nwpserial.h> #include <linux/clk.h> +#include "8250/8250.h" + struct of_serial_info { struct clk *clk; int type; @@ -171,11 +172,17 @@ static int of_platform_serial_probe(struct platform_device *ofdev) #ifdef CONFIG_SERIAL_8250 case PORT_8250 ... PORT_MAX_8250: { - /* For now the of bindings don't support the extra - 8250 specific bits */ struct uart_8250_port port8250; memset(&port8250, 0, sizeof(port8250)); port8250.port = port; + + if (port.fifosize) + port8250.capabilities = UART_CAP_FIFO; + + if (of_property_read_bool(ofdev->dev.of_node, + "auto-flow-control")) + port8250.capabilities |= UART_CAP_AFE; + ret = serial8250_register_8250_port(&port8250); break; } -- 1.7.10.4
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