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tty: serial: meson: retrieve port FIFO size from DT

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[ Upstream commit 27d44e05d7b85d9d4cfe0a3c0663ea49752ece93 ]

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.

Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20210518075833.3736038-3-narmstrong@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 2a1d728f20ed ("tty: serial: meson: fix hard LOCKUP on crtscts mode")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Neil Armstrong
2021-05-18 09:58:32 +02:00
committed by Greg Kroah-Hartman
parent 1e66cd4083
commit 980c3135f1
1 changed files with 4 additions and 1 deletions
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5
drivers/tty/serial/meson_uart.c
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@@ -728,6 +728,7 @@ static int meson_uart_probe(struct platform_device *pdev)
{ {
struct resource *res_mem, *res_irq; struct resource *res_mem, *res_irq;
struct uart_port *port; struct uart_port *port;
u32 fifosize = 64; /* Default is 64, 128 for EE UART_0 */
int ret = 0; int ret = 0;
if (pdev->dev.of_node) if (pdev->dev.of_node)
@@ -755,6 +756,8 @@ static int meson_uart_probe(struct platform_device *pdev)
if (!res_irq) if (!res_irq)
return -ENODEV; return -ENODEV;
of_property_read_u32(pdev->dev.of_node, "fifo-size", &fifosize);
if (meson_ports[pdev->id]) { if (meson_ports[pdev->id]) {
dev_err(&pdev->dev, "port %d already allocated\n", pdev->id); dev_err(&pdev->dev, "port %d already allocated\n", pdev->id);
return -EBUSY; return -EBUSY;
@@ -784,7 +787,7 @@ static int meson_uart_probe(struct platform_device *pdev)
port->type = PORT_MESON; port->type = PORT_MESON;
port->x_char = 0; port->x_char = 0;
port->ops = &meson_uart_ops; port->ops = &meson_uart_ops;
port->fifosize = 64; port->fifosize = fifosize;
meson_ports[pdev->id] = port; meson_ports[pdev->id] = port;
platform_set_drvdata(pdev, port); platform_set_drvdata(pdev, port);