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authorStephen Boyd <sboyd@codeaurora.org>2014-10-22 17:33:01 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-06 14:57:23 -0800
commit97f754710304382607417c700476007443cd96a4 (patch)
tree6032440d9bb279e9ad9017e2ef6124df9b44169d /drivers/tty/serial/msm_serial.c
parenta12f1b406f2d3c3e3bba5300b6e420d004ca263b (diff)
downloadlinux-97f754710304382607417c700476007443cd96a4.tar.gz
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>
Diffstat (limited to 'drivers/tty/serial/msm_serial.c')
-rw-r--r--drivers/tty/serial/msm_serial.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
index b507f5a16c1c..09364dd8cf3a 100644
--- a/drivers/tty/serial/msm_serial.c
+++ b/drivers/tty/serial/msm_serial.c
@@ -1044,17 +1044,22 @@ static int msm_serial_probe(struct platform_device *pdev)
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);