From 2f23ecbf40c8c6572017a036505695e1c2ebb7c4 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Thu, 8 Oct 2020 18:43:56 +0200 Subject: [PATCH] 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 Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/ccs/ccs-core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c index fae8ceded861e..08fce285f73af 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)) -- 2.30.2