From: Dai Okamura Date: Fri, 28 Sep 2018 02:05:09 +0000 (+0900) Subject: serial: 8250_uniphier: add auto-flow-control support X-Git-Tag: v4.20-rc1~71^2~12 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=aad2d4952d24d8910d9fc64da9107df0fb780a09;p=linux.git serial: 8250_uniphier: add auto-flow-control support Add selective auto-flow-control support for UniPhier serial driver. Signed-off-by: Dai Okamura Signed-off-by: Masahiro Yamada Reviewed-by: Rob Herring Signed-off-by: Greg Kroah-Hartman --- diff --git a/Documentation/devicetree/bindings/serial/uniphier-uart.txt b/Documentation/devicetree/bindings/serial/uniphier-uart.txt index 811c479b373d..7a1bf02bb869 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 1028c02c5d83..164ba133437a 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;