From: Neil Armstrong <narmstrong@baylibre.com>
To: gregkh@linuxfoundation.org
Cc: devicetree@vger.kernel.org, linux-serial@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
Neil Armstrong <narmstrong@baylibre.com>
Subject: [PATCH 2/3] tty: serial: meson: retrieve port FIFO size from DT
Date: Mon, 15 Mar 2021 09:34:58 +0100 [thread overview]
Message-ID: <20210315083459.359773-3-narmstrong@baylibre.com> (raw)
In-Reply-To: <20210315083459.359773-1-narmstrong@baylibre.com>
Now the DT bindings has a property to get the FIFO size for a particular port,
retrieve it and use to setup the FIFO interrupts threshold.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/tty/serial/meson_uart.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c
index 69eeef9edfa5..7244b12aefab 100644
--- a/drivers/tty/serial/meson_uart.c
+++ b/drivers/tty/serial/meson_uart.c
@@ -717,6 +717,7 @@ static int meson_uart_probe(struct platform_device *pdev)
{
struct resource *res_mem, *res_irq;
struct uart_port *port;
+ u32 fifosize = 64; /* Default is 64, 128 for EE UART_0 */
int ret = 0;
int id = -1;
@@ -743,6 +744,8 @@ static int meson_uart_probe(struct platform_device *pdev)
if (!res_irq)
return -ENODEV;
+ of_property_read_u32(pdev->dev.of_node, "amlogic,uart-fifosize", &fifosize);
+
if (meson_ports[pdev->id]) {
dev_err(&pdev->dev, "port %d already allocated\n", pdev->id);
return -EBUSY;
@@ -772,7 +775,7 @@ static int meson_uart_probe(struct platform_device *pdev)
port->type = PORT_MESON;
port->x_char = 0;
port->ops = &meson_uart_ops;
- port->fifosize = 64;
+ port->fifosize = fifosize;
meson_ports[pdev->id] = port;
platform_set_drvdata(pdev, port);
--
2.25.1
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next prev parent reply other threads:[~2021-03-15 8:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 8:34 [PATCH 0/3] tty: serial: meson: add amlogic,uart-fifosize property Neil Armstrong
2021-03-15 8:34 ` [PATCH 1/3] dt-bindings: serial: amlogic, meson-uart: add amlogic, uart-fifosize property Neil Armstrong
2021-03-23 21:33 ` Martin Blumenstingl
2021-03-24 17:40 ` Rob Herring
2021-03-15 8:34 ` Neil Armstrong [this message]
2021-03-16 0:26 ` [PATCH 2/3] tty: serial: meson: retrieve port FIFO size from DT Kevin Hilman
2021-03-23 21:34 ` Martin Blumenstingl
2021-03-15 8:34 ` [PATCH 3/3] arm64: dts: meson: set 128bytes FIFO size on uart A Neil Armstrong
2021-05-18 7:58 [PATCH 0/3] tty: serial: meson: add amlogic,uart-fifosize property Neil Armstrong
2021-05-18 7:58 ` [PATCH 2/3] tty: serial: meson: retrieve port FIFO size from DT Neil Armstrong
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