[PATCH 3/3] serial: 8250_uniphier: add auto-flow-control support
From: Masahiro Yamada <hidden>
Date: 2018-09-19 05:29:53
Also in:
linux-arm-kernel, linux-serial, lkml
Subsystem:
8250/16?50 (and clone uarts) serial driver, arm/uniphier architecture, open firmware and flattened device tree bindings, the rest, tty layer and serial drivers · Maintainers:
Greg Kroah-Hartman, Kunihiko Hayashi, Masami Hiramatsu, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Jiri Slaby
From: Dai Okamura <redacted> Add selective auto-flow-control support for UniPhier serial driver. Signed-off-by: Dai Okamura <redacted> Signed-off-by: Masahiro Yamada <redacted> --- 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