lkml.org 
[lkml]   [2018]   [Sep]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/3] serial: 8250_uniphier: add auto-flow-control support
Date
From: Dai Okamura <okamura.dai@socionext.com>

Add selective auto-flow-control support for UniPhier serial driver.

Signed-off-by: Dai Okamura <okamura.dai@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---

Documentation/devicetree/bindings/serial/uniphier-uart.txt | 3 +++
drivers/tty/serial/8250/8250_uniphier.c | 3 +++
2 files changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/uniphier-uart.txt b/Documentation/devicetree/bindings/serial/uniphier-uart.txt
index 811c479..7a1bf02 100644
--- a/Documentation/devicetree/bindings/serial/uniphier-uart.txt
+++ b/Documentation/devicetree/bindings/serial/uniphier-uart.txt
@@ -6,6 +6,9 @@ Required properties:
- interrupts: a single interrupt specifier.
- clocks: phandle to the input clock.

+Optional properties:
+-auto-flow-control: enable automatic flow control support.
+
Example:
aliases {
serial0 = &serial0;
diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c
index 1028c02..164ba13 100644
--- a/drivers/tty/serial/8250/8250_uniphier.c
+++ b/drivers/tty/serial/8250/8250_uniphier.c
@@ -222,6 +222,9 @@ static int uniphier_uart_probe(struct platform_device *pdev)
up.port.flags = UPF_FIXED_PORT | UPF_FIXED_TYPE;
up.capabilities = UART_CAP_FIFO;

+ if (of_property_read_bool(dev->of_node, "auto-flow-control"))
+ up.capabilities |= UART_CAP_AFE;
+
up.port.serial_in = uniphier_serial_in;
up.port.serial_out = uniphier_serial_out;
up.dl_read = uniphier_serial_dl_read;
--
2.7.4
\
 
 \ /
  Last update: 2018-09-19 07:31    [W:0.044 / U:12.844 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site