iio: Update iio_channel_get API to use consumer device pointer as argument

For iio_channel_get to work with OF based configurations, it needs the
consumer device pointer instead of the consumer device name as argument.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Anton Vorontsov <anton@enomsg.org>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

5 files changed, 20 insertions, 11 deletions

diff --git a/drivers/extcon/extcon-adc-jack.c b/drivers/extcon/extcon-adc-jack.c
index eda2a1aa4adb..d0233cd18ffa 100644
--- a/drivers/extcon/extcon-adc-jack.c
+++ b/drivers/extcon/extcon-adc-jack.c
@@ -135,8 +135,7 @@ static int adc_jack_probe(struct platform_device *pdev)
                 ;
         data->num_conditions = i;
 
-        data->chan = iio_channel_get(dev_name(&pdev->dev),
-                        pdata->consumer_channel);
+        data->chan = iio_channel_get(&pdev->dev, pdata->consumer_channel);
         if (IS_ERR(data->chan)) {
                 err = PTR_ERR(data->chan);
                 goto out;
diff --git a/drivers/iio/inkern.c b/drivers/iio/inkern.c
index c42aba6817e8..b289915b8469 100644
--- a/drivers/iio/inkern.c
+++ b/drivers/iio/inkern.c
@@ -93,7 +93,8 @@ static const struct iio_chan_spec
 }
 
 
-struct iio_channel *iio_channel_get(const char *name, const char *channel_name)
+static struct iio_channel *iio_channel_get_sys(const char *name,
+                                               const char *channel_name)
 {
         struct iio_map_internal *c_i = NULL, *c = NULL;
         struct iio_channel *channel;
@@ -144,6 +145,14 @@ error_no_mem:
         iio_device_put(c->indio_dev);
         return ERR_PTR(err);
 }
+
+struct iio_channel *iio_channel_get(struct device *dev,
+                                    const char *channel_name)
+{
+        const char *name = dev ? dev_name(dev) : NULL;
+
+        return iio_channel_get_sys(name, channel_name);
+}
 EXPORT_SYMBOL_GPL(iio_channel_get);
 
 void iio_channel_release(struct iio_channel *channel)
diff --git a/drivers/power/generic-adc-battery.c b/drivers/power/generic-adc-battery.c
index 32ce17e235c0..42733c4dcb0e 100644
--- a/drivers/power/generic-adc-battery.c
+++ b/drivers/power/generic-adc-battery.c
@@ -287,8 +287,8 @@ static int gab_probe(struct platform_device *pdev)
          * based on the channel supported by consumer device.
          */
         for (chan = 0; chan < ARRAY_SIZE(gab_chan_name); chan++) {
-                adc_bat->channel[chan] = iio_channel_get(dev_name(&pdev->dev),
-                                                gab_chan_name[chan]);
+                adc_bat->channel[chan] = iio_channel_get(&pdev->dev,
+                                                         gab_chan_name[chan]);
                 if (IS_ERR(adc_bat->channel[chan])) {
                         ret = PTR_ERR(adc_bat->channel[chan]);
                 } else {
diff --git a/drivers/power/lp8788-charger.c b/drivers/power/lp8788-charger.c
index 22b6407c9ca9..27889088e78e 100644
--- a/drivers/power/lp8788-charger.c
+++ b/drivers/power/lp8788-charger.c
@@ -580,7 +580,7 @@ static void lp8788_irq_unregister(struct platform_device *pdev,
         }
 }
 
-static void lp8788_setup_adc_channel(const char *consumer_name,
+static void lp8788_setup_adc_channel(struct device *dev,
                                 struct lp8788_charger *pchg)
 {
         struct lp8788_charger_platform_data *pdata = pchg->pdata;
@@ -590,11 +590,11 @@ static void lp8788_setup_adc_channel(const char *consumer_name,
                 return;
 
         /* ADC channel for battery voltage */
-        chan = iio_channel_get(consumer_name, pdata->adc_vbatt);
+        chan = iio_channel_get(dev, pdata->adc_vbatt);
         pchg->chan[LP8788_VBATT] = IS_ERR(chan) ? NULL : chan;
 
         /* ADC channel for battery temperature */
-        chan = iio_channel_get(consumer_name, pdata->adc_batt_temp);
+        chan = iio_channel_get(dev, pdata->adc_batt_temp);
         pchg->chan[LP8788_BATT_TEMP] = IS_ERR(chan) ? NULL : chan;
 }
 
@@ -704,7 +704,7 @@ static int lp8788_charger_probe(struct platform_device *pdev)
         if (ret)
                 return ret;
 
-        lp8788_setup_adc_channel(pdev->name, pchg);
+        lp8788_setup_adc_channel(&pdev->dev, pchg);
 
         ret = lp8788_psy_register(pdev, pchg);
         if (ret)
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index a85787ac66ab..833926c91aa8 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h
@@ -31,14 +31,15 @@ struct iio_channel {
 
 /**
  * iio_channel_get() - get description of all that is needed to access channel.
- * @name:               Unique name of the device as provided in the iio_map
+ * @dev:                Pointer to consumer device. Device name must match
+ *                      the name of the device as provided in the iio_map
  *                      with which the desired provider to consumer mapping
  *                      was registered.
  * @consumer_channel:   Unique name to identify the channel on the consumer
  *                      side. This typically describes the channels use within
  *                      the consumer. E.g. 'battery_voltage'
  */
-struct iio_channel *iio_channel_get(const char *name,
+struct iio_channel *iio_channel_get(struct device *dev,
                                     const char *consumer_channel);
 
 /**