[PATCH v1] meson saradc: add iio device attrib to switch channel 7 mux

[Andy Shevchenko]

On Wed, May 24, 2023 at 03:01:11AM +0300, George Stark wrote:
> Patch adds two sysfs nodes: chan7_mux to set mux state
> and chan7_mux_available to show available mux states.
> Mux can be used to debug and calibrate adc by
> switching and measuring well-known inputs like gnd, vdd etc.

GND
Vdd

...

> +static ssize_t chan7_mux_store(struct device *dev,
> +			       struct device_attribute *attr,
> +			       const char *buf, size_t count)
> +{
> +	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
> +	int i;
> +
> +	for (i = 0; i < ARRAY_SIZE(chan7_vol); i++)
> +		if (!strcmp(chan7_vol[i], buf)) {
> +			meson_sar_adc_set_chan7_mux(indio_dev, i);
> +			return count;
> +		}
> +
> +	return -EINVAL;

NIH sysfs_match_string().

> +}

...

> +static IIO_DEVICE_ATTR_RW(chan7_mux, -1);
> +static IIO_DEVICE_ATTR_RO(chan7_mux_available, -1);

Place each of them near to the respective callback(s),

...

> +static struct attribute *meson_sar_adc_attrs[] = {
> +	&iio_dev_attr_chan7_mux_available.dev_attr.attr,
> +	&iio_dev_attr_chan7_mux.dev_attr.attr,
> +	NULL,

No comma for the terminator entry.

> +};

-- 
With Best Regards,
Andy Shevchenko