serial: ns16550: Handle -ENOENT when requesting clock

When calling clk_get_by_index(), fall back to the legacy method of
getting the clock if -ENOENT is returned.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 765499d..29d5471 100644 (file)
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -408,7 +408,7 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev)
                err = clk_get_rate(&clk);
                if (!IS_ERR_VALUE(err))
                        plat->clock = err;
-       } else if (err != -ENODEV && err != -ENOSYS) {
+       } else if (err != -ENOENT && err != -ENODEV && err != -ENOSYS) {
                debug("ns16550 failed to get clock\n");
                return err;
        }