simple-pm-bus: Make clocks optional

simple-pm-bus binding requires either power-domains or clocks, not both.
Allow clk_get_bulk() to return -ENOENT.

When no clocks are present, bulk->count is set to 0, which works
correctly with clk_enable_bulk() and other clk functions used in this
driver.

Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
Signed-off-by: Markus Schneider-Pargmann (TI.com) <msp@baylibre.com>

diff --git a/drivers/core/simple-pm-bus.c b/drivers/core/simple-pm-bus.c
index f38372ec60bcad4d8c630001d164630f2f99dc32..5df11728e82848b83eae6ab7dad857a8762c2aab 100644 (file)
--- a/drivers/core/simple-pm-bus.c
+++ b/drivers/core/simple-pm-bus.c
@@ -16,7 +16,7 @@ static int simple_pm_bus_probe(struct udevice *dev)
        struct clk_bulk *bulk = dev_get_priv(dev);
 
        ret = clk_get_bulk(dev, bulk);
-       if (ret)
+       if (ret && ret != -ENOENT)
                return ret;
 
        ret = clk_enable_bulk(bulk);