[PATCH v2 2/3] tty: serial: meson: retrieve port FIFO size from DT

[Neil Armstrong]

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 <narmstr...@baylibre.com>
Reviewed-by: Kevin Hilman <khil...@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