soc: fsl: dpio: store a backpointer to the device backing the dpaa2_io

Add a new field in the dpaa2_io structure to hold a backpointer to the
actual DPIO device.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

drivers/soc/fsl/dpio/dpio-driver.c

@@ -176,7 +176,7 @@ static int dpaa2_dpio_probe(struct fsl_mc_device *dpio_dev)
 	if (err)
 		goto err_register_dpio_irq;
 
-	priv->io = dpaa2_io_create(&desc);
+	priv->io = dpaa2_io_create(&desc, dev);
 	if (!priv->io) {
 		dev_err(dev, "dpaa2_io_create failed\n");
 		err = -ENOMEM;

drivers/soc/fsl/dpio/dpio-service.c

@@ -27,6 +27,7 @@ struct dpaa2_io {
 	/* protect notifications list */
 	spinlock_t lock_notifications;
 	struct list_head notifications;
+	struct device *dev;
 };
 
 struct dpaa2_io_store {
@@ -98,13 +99,15 @@ EXPORT_SYMBOL_GPL(dpaa2_io_service_select);
 /**
  * dpaa2_io_create() - create a dpaa2_io object.
  * @desc: the dpaa2_io descriptor
+ * @dev: the actual DPIO device
  *
  * Activates a "struct dpaa2_io" corresponding to the given config of an actual
  * DPIO object.
  *
  * Return a valid dpaa2_io object for success, or NULL for failure.
  */
-struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc)
+struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc,
+				 struct device *dev)
 {
 	struct dpaa2_io *obj = kmalloc(sizeof(*obj), GFP_KERNEL);
 
@@ -146,6 +149,8 @@ struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc)
 		dpio_by_cpu[desc->cpu] = obj;
 	spin_unlock(&dpio_list_lock);
 
+	obj->dev = dev;
+
 	return obj;
 }
 

include/soc/fsl/dpaa2-io.h

@@ -57,7 +57,8 @@ struct dpaa2_io_desc {
 	u32 qman_version;
 };
 
-struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc);
+struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc,
+				 struct device *dev);
 
 void dpaa2_io_down(struct dpaa2_io *d);