diff mbox series

[19/24] ccs: Add a sanity check for external clock frequency

Message ID 20201207211530.21180-20-sakari.ailus@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series Additional CCS feature support | expand

Commit Message

Sakari Ailus Dec. 7, 2020, 9:15 p.m. UTC
The driver depends on the external clock frequency. Add a sanity check for
the frequency, by returning an error from probe if it's zero.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/i2c/ccs/ccs-core.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c
index fae8ceded861..08fce285f73a 100644
--- a/drivers/media/i2c/ccs/ccs-core.c
+++ b/drivers/media/i2c/ccs/ccs-core.c
@@ -3275,6 +3275,11 @@  static int ccs_probe(struct i2c_client *client)
 		return -EINVAL;
 	}
 
+	if (!sensor->hwcfg.ext_clk) {
+		dev_err(&client->dev, "cannot work with xclk frequency 0\n");
+		return -EINVAL;
+	}
+
 	sensor->reset = devm_gpiod_get_optional(&client->dev, "reset",
 						GPIOD_OUT_HIGH);
 	if (IS_ERR(sensor->reset))