tty: serial: msm_serial: Use DT aliases
We rely on probe order of this driver to determine the line number for
the uart port. This makes it impossible to know the line number
when these devices are populated via DT. Use the DT alias
mechanism to assign the line based on the aliases node.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index b507f5a..09364dd 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -1044,17 +1044,22 @@
struct resource *resource;
struct uart_port *port;
const struct of_device_id *id;
- int irq;
+ int irq, line;
if (pdev->id == -1)
pdev->id = atomic_inc_return(&msm_uart_next_id) - 1;
- if (unlikely(pdev->id < 0 || pdev->id >= UART_NR))
+ if (pdev->dev.of_node)
+ line = of_alias_get_id(pdev->dev.of_node, "serial");
+ else
+ line = pdev->id;
+
+ if (unlikely(line < 0 || line >= UART_NR))
return -ENXIO;
- dev_info(&pdev->dev, "msm_serial: detected port #%d\n", pdev->id);
+ dev_info(&pdev->dev, "msm_serial: detected port #%d\n", line);
- port = get_port_from_line(pdev->id);
+ port = get_port_from_line(line);
port->dev = &pdev->dev;
msm_port = UART_TO_MSM(port);