4.19-stable review patch. If anyone has any objections, please let me know.
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From: Neil Armstrong narmstrong@baylibre.com
[ 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 --- 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 6a74a31231ebf..7563fd215d816 100644 --- a/drivers/tty/serial/meson_uart.c +++ b/drivers/tty/serial/meson_uart.c @@ -663,6 +663,7 @@ 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;
if (pdev->dev.of_node) @@ -690,6 +691,8 @@ static int meson_uart_probe(struct platform_device *pdev) if (!res_irq) return -ENODEV;
+ of_property_read_u32(pdev->dev.of_node, "fifo-size", &fifosize); + if (meson_ports[pdev->id]) { dev_err(&pdev->dev, "port %d already allocated\n", pdev->id); return -EBUSY; @@ -719,7 +722,7 @@ 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);