[media] smiapp: Make clock control optional

The clock control is not explicitly controlled by the driver in two cases:
ACPI based systems and when the clock is part of the power sequence of the
camera module.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
index 009b5e2..fbd851b 100644 (file)
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2892,7 +2892,10 @@ static int smiapp_probe(struct i2c_client *client,
        }
 
        sensor->ext_clk = devm_clk_get(&client->dev, NULL);
-       if (IS_ERR(sensor->ext_clk)) {
+       if (PTR_ERR(sensor->ext_clk) == -ENOENT) {
+               dev_info(&client->dev, "no clock defined, continuing...\n");
+               sensor->ext_clk = NULL;
+       } else if (IS_ERR(sensor->ext_clk)) {
                dev_err(&client->dev, "could not get clock (%ld)\n",
                        PTR_ERR(sensor->ext_clk));
                return -EPROBE_DEFER;