Re: [PATCH] iio: adc: ti-adc081c: add ACPI device ID matching

[Jonathan Cameron <jic23@kernel.org>]

On 27/05/16 18:37, Dan O'Donovan wrote:
> Add ACPI device ID matching for TI ADC081C/ADC101C/ADC121C ADCs.
> 
> Signed-off-by: Dan O'Donovan <dan@emutex.com>
Applied to the togreg branch of iio.git.
Will be initially pushed out as testing for the autobuilders to
play with it.

Thanks,

Jonathan
> ---
>  drivers/iio/adc/ti-adc081c.c | 26 +++++++++++++++++++++++++-
>  1 file changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c
> index 9fd032d..f8807ad 100644
> --- a/drivers/iio/adc/ti-adc081c.c
> +++ b/drivers/iio/adc/ti-adc081c.c
> @@ -22,6 +22,7 @@
>  #include <linux/i2c.h>
>  #include <linux/module.h>
>  #include <linux/of.h>
> +#include <linux/acpi.h>
>  
>  #include <linux/iio/iio.h>
>  #include <linux/iio/buffer.h>
> @@ -149,12 +150,24 @@ static int adc081c_probe(struct i2c_client *client,
>  {
>  	struct iio_dev *iio;
>  	struct adc081c *adc;
> -	struct adcxx1c_model *model = &adcxx1c_models[id->driver_data];
> +	struct adcxx1c_model *model;
>  	int err;
>  
>  	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA))
>  		return -EOPNOTSUPP;
>  
> +	if (ACPI_COMPANION(&client->dev)) {
> +		const struct acpi_device_id *ad_id;
> +
> +		ad_id = acpi_match_device(client->dev.driver->acpi_match_table,
> +					  &client->dev);
> +		if (!ad_id)
> +			return -ENODEV;
> +		model = &adcxx1c_models[ad_id->driver_data];
> +	} else {
> +		model = &adcxx1c_models[id->driver_data];
> +	}
> +
>  	iio = devm_iio_device_alloc(&client->dev, sizeof(*adc));
>  	if (!iio)
>  		return -ENOMEM;
> @@ -231,10 +244,21 @@ static const struct of_device_id adc081c_of_match[] = {
>  MODULE_DEVICE_TABLE(of, adc081c_of_match);
>  #endif
>  
> +#ifdef CONFIG_ACPI
> +static const struct acpi_device_id adc081c_acpi_match[] = {
> +	{ "ADC081C", ADC081C },
> +	{ "ADC101C", ADC101C },
> +	{ "ADC121C", ADC121C },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(acpi, adc081c_acpi_match);
> +#endif
> +
>  static struct i2c_driver adc081c_driver = {
>  	.driver = {
>  		.name = "adc081c",
>  		.of_match_table = of_match_ptr(adc081c_of_match),
> +		.acpi_match_table = ACPI_PTR(adc081c_acpi_match),
>  	},
>  	.probe = adc081c_probe,
>  	.remove = adc081c_remove,
>