[PATCH v2 2/3] tty: serial: meson: retrieve port FIFO size from DT
From: Neil Armstrong <hidden>
Date: 2021-03-25 15:25:03
Also in:
linux-amlogic, linux-arm-kernel, linux-serial, lkml
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
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 <redacted> Reviewed-by: Kevin Hilman <khilman@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..ce4dbfb0bd24 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, "fifo-size", &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