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[media] smiapp: Get clock rate if it's not available through DT

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Obtain the clock rate from the clock framework if it's not available
through DT. The assumption is that the parent device (camera module)
defines the rate as clock control is a part of the power on and power off
sequences --- which are camera module specific.

Also use the clock rate from DT if no clock is provided.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Sakari Ailus 2017-08-29 09:41:24 -03:00 committed by Mauro Carvalho Chehab
parent f689866aec
commit de10c1619c
1 changed files with 33 additions and 19 deletions
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52
drivers/media/i2c/smiapp/smiapp-core.c
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@ -2829,12 +2829,10 @@ static struct smiapp_hwconfig *smiapp_get_hwconfig(struct device *dev)
/* NVM size is not mandatory */
fwnode_property_read_u32(fwnode, "nokia,nvm-size", &hwcfg->nvm_size);
rval = fwnode_property_read_u32(fwnode, "clock-frequency",
rval = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
&hwcfg->ext_clk);
if (rval) {
dev_warn(dev, "can't get clock-frequency\n");
goto out_err;
}
if (rval)
dev_info(dev, "can't get clock-frequency\n");
dev_dbg(dev, "nvm %d, clk %d, mode %d\n",
hwcfg->nvm_size, hwcfg->ext_clk, hwcfg->csi_signalling_mode);
@ -2870,7 +2868,6 @@ static int smiapp_probe(struct i2c_client *client,
{
struct smiapp_sensor *sensor;
struct smiapp_hwconfig *hwcfg = smiapp_get_hwconfig(&client->dev);
unsigned long rate;
unsigned int i;
int rval;
@ -2901,20 +2898,37 @@ static int smiapp_probe(struct i2c_client *client,
return -EPROBE_DEFER;
}
rval = clk_set_rate(sensor->ext_clk, sensor->hwcfg->ext_clk);
if (rval < 0) {
dev_err(&client->dev,
"unable to set clock freq to %u\n",
sensor->hwcfg->ext_clk);
return rval;
}
if (sensor->ext_clk) {
if (sensor->hwcfg->ext_clk) {
unsigned long rate;
rate = clk_get_rate(sensor->ext_clk);
if (rate != sensor->hwcfg->ext_clk) {
dev_err(&client->dev,
"can't set clock freq, asked for %u but got %lu\n",
sensor->hwcfg->ext_clk, rate);
return rval;
rval = clk_set_rate(sensor->ext_clk,
sensor->hwcfg->ext_clk);
if (rval < 0) {
dev_err(&client->dev,
"unable to set clock freq to %u\n",
sensor->hwcfg->ext_clk);
return rval;
}
rate = clk_get_rate(sensor->ext_clk);
if (rate != sensor->hwcfg->ext_clk) {
dev_err(&client->dev,
"can't set clock freq, asked for %u but got %lu\n",
sensor->hwcfg->ext_clk, rate);
return rval;
}
} else {
sensor->hwcfg->ext_clk = clk_get_rate(sensor->ext_clk);
dev_dbg(&client->dev, "obtained clock freq %u\n",
sensor->hwcfg->ext_clk);
}
} else if (sensor->hwcfg->ext_clk) {
dev_dbg(&client->dev, "assuming clock freq %u\n",
sensor->hwcfg->ext_clk);
} else {
dev_err(&client->dev, "unable to obtain clock freq\n");
return -EINVAL;
}
sensor->xshutdown = devm_gpiod_get_optional(&client->dev, "xshutdown",