Re: [PATCH v3 2/2] iio: adc: ti-ads1015: Make use of device property API

[Jonathan Cameron <jic23@kernel.org>]

On Thu,  5 Dec 2019 19:46:37 +0200
Andy Shevchenko <andriy.shevchenko@linux.intel.com> wrote:

> Make use of device property API in this driver so that both OF based
> system and ACPI based system can use this driver.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Applied.

Thanks,

Jonathan

> ---
> v2:
> - use device_for_each_child_node()
> - leave 'node' variable name (reduce churn)
>  drivers/iio/adc/ti-ads1015.c | 57 ++++++++++++++++--------------------
>  1 file changed, 26 insertions(+), 31 deletions(-)
> 
> diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
> index 3b123b4f0b99..5ea4f45d6bad 100644
> --- a/drivers/iio/adc/ti-ads1015.c
> +++ b/drivers/iio/adc/ti-ads1015.c
> @@ -12,10 +12,10 @@
>   */
>  
>  #include <linux/module.h>
> -#include <linux/of_device.h>
>  #include <linux/init.h>
>  #include <linux/irq.h>
>  #include <linux/i2c.h>
> +#include <linux/property.h>
>  #include <linux/regmap.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/mutex.h>
> @@ -77,6 +77,7 @@
>  #define ADS1015_DEFAULT_CHAN		0
>  
>  enum chip_ids {
> +	ADSXXXX = 0,
>  	ADS1015,
>  	ADS1115,
>  };
> @@ -843,65 +844,58 @@ static const struct iio_info ads1115_info = {
>  	.attrs          = &ads1115_attribute_group,
>  };
>  
> -#ifdef CONFIG_OF
> -static int ads1015_get_channels_config_of(struct i2c_client *client)
> +static int ads1015_client_get_channels_config(struct i2c_client *client)
>  {
>  	struct iio_dev *indio_dev = i2c_get_clientdata(client);
>  	struct ads1015_data *data = iio_priv(indio_dev);
> -	struct device_node *node;
> +	struct device *dev = &client->dev;
> +	struct fwnode_handle *node;
> +	int i = -1;
>  
> -	if (!client->dev.of_node ||
> -	    !of_get_next_child(client->dev.of_node, NULL))
> -		return -EINVAL;
> -
> -	for_each_child_of_node(client->dev.of_node, node) {
> +	device_for_each_child_node(dev, node) {
>  		u32 pval;
>  		unsigned int channel;
>  		unsigned int pga = ADS1015_DEFAULT_PGA;
>  		unsigned int data_rate = ADS1015_DEFAULT_DATA_RATE;
>  
> -		if (of_property_read_u32(node, "reg", &pval)) {
> -			dev_err(&client->dev, "invalid reg on %pOF\n",
> -				node);
> +		if (fwnode_property_read_u32(node, "reg", &pval)) {
> +			dev_err(dev, "invalid reg on %pfw\n", node);
>  			continue;
>  		}
>  
>  		channel = pval;
>  		if (channel >= ADS1015_CHANNELS) {
> -			dev_err(&client->dev,
> -				"invalid channel index %d on %pOF\n",
> +			dev_err(dev, "invalid channel index %d on %pfw\n",
>  				channel, node);
>  			continue;
>  		}
>  
> -		if (!of_property_read_u32(node, "ti,gain", &pval)) {
> +		if (!fwnode_property_read_u32(node, "ti,gain", &pval)) {
>  			pga = pval;
>  			if (pga > 6) {
> -				dev_err(&client->dev, "invalid gain on %pOF\n",
> -					node);
> -				of_node_put(node);
> +				dev_err(dev, "invalid gain on %pfw\n", node);
> +				fwnode_handle_put(node);
>  				return -EINVAL;
>  			}
>  		}
>  
> -		if (!of_property_read_u32(node, "ti,datarate", &pval)) {
> +		if (!fwnode_property_read_u32(node, "ti,datarate", &pval)) {
>  			data_rate = pval;
>  			if (data_rate > 7) {
> -				dev_err(&client->dev,
> -					"invalid data_rate on %pOF\n",
> -					node);
> -				of_node_put(node);
> +				dev_err(dev, "invalid data_rate on %pfw\n", node);
> +				fwnode_handle_put(node);
>  				return -EINVAL;
>  			}
>  		}
>  
>  		data->channel_data[channel].pga = pga;
>  		data->channel_data[channel].data_rate = data_rate;
> +
> +		i++;
>  	}
>  
> -	return 0;
> +	return i < 0 ? -EINVAL : 0;
>  }
> -#endif
>  
>  static void ads1015_get_channels_config(struct i2c_client *client)
>  {
> @@ -910,10 +904,9 @@ static void ads1015_get_channels_config(struct i2c_client *client)
>  	struct iio_dev *indio_dev = i2c_get_clientdata(client);
>  	struct ads1015_data *data = iio_priv(indio_dev);
>  
> -#ifdef CONFIG_OF
> -	if (!ads1015_get_channels_config_of(client))
> +	if (!ads1015_client_get_channels_config(client))
>  		return;
> -#endif
> +
>  	/* fallback on default configuration */
>  	for (k = 0; k < ADS1015_CHANNELS; ++k) {
>  		data->channel_data[k].pga = ADS1015_DEFAULT_PGA;
> @@ -951,9 +944,8 @@ static int ads1015_probe(struct i2c_client *client,
>  	indio_dev->name = ADS1015_DRV_NAME;
>  	indio_dev->modes = INDIO_DIRECT_MODE;
>  
> -	if (client->dev.of_node)
> -		chip = (enum chip_ids)of_device_get_match_data(&client->dev);
> -	else
> +	chip = (enum chip_ids)device_get_match_data(&client->dev);
> +	if (chip == ADSXXXX)
>  		chip = id->driver_data;
>  	switch (chip) {
>  	case ADS1015:
> @@ -968,6 +960,9 @@ static int ads1015_probe(struct i2c_client *client,
>  		indio_dev->info = &ads1115_info;
>  		data->data_rate = (unsigned int *) &ads1115_data_rate;
>  		break;
> +	default:
> +		dev_err(&client->dev, "Unknown chip %d\n", chip);
> +		return -EINVAL;
>  	}
>  
>  	data->event_channel = ADS1015_CHANNELS;