hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

media: ov7670: make "xclk" clock optional 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/media/i2c/ov7670.c
View File

@ -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);