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media: ov7670: make "xclk" clock optional

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When the "xclk" clock was added, it was made mandatory. This broke the
driver on an OLPC plaform which doesn't know such clock. Make it
optional.

Tested on a OLPC XO-1 laptop.

Fixes: 0a024d634c ("[media] ov7670: get xclk")

Cc: stable@vger.kernel.org # 4.11+
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Lubomir Rintel 2018-10-04 17:29:03 -04:00 committed by Mauro Carvalho Chehab
parent 146c45ef1f
commit 786fa584ed
1 changed files with 17 additions and 10 deletions
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27
drivers/media/i2c/ov7670.c
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@ -1808,17 +1808,24 @@ static int ov7670_probe(struct i2c_client *client,
info->pclk_hb_disable = true;
}
info->clk = devm_clk_get(&client->dev, "xclk");
if (IS_ERR(info->clk))
return PTR_ERR(info->clk);
ret = clk_prepare_enable(info->clk);
if (ret)
return ret;
info->clk = devm_clk_get(&client->dev, "xclk"); /* optional */
if (IS_ERR(info->clk)) {
ret = PTR_ERR(info->clk);
if (ret == -ENOENT)
info->clk = NULL;
else
return ret;
}
if (info->clk) {
ret = clk_prepare_enable(info->clk);
if (ret)
return ret;
info->clock_speed = clk_get_rate(info->clk) / 1000000;
if (info->clock_speed < 10 || info->clock_speed > 48) {
ret = -EINVAL;
goto clk_disable;
info->clock_speed = clk_get_rate(info->clk) / 1000000;
if (info->clock_speed < 10 || info->clock_speed > 48) {
ret = -EINVAL;
goto clk_disable;
}
}
ret = ov7670_init_gpio(client, info);