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media: ccs: Add a sanity check for external clock frequency 

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>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Sakari Ailus 2020-10-08 18:43:56 +02:00 committed by Mauro Carvalho Chehab
parent 2fed6c84dc
commit 2f23ecbf40
1 changed files with 5 additions and 0 deletions
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5
drivers/media/i2c/ccs/ccs-core.c
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@ -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))