Register DPLL sub-devices to expose the functionality provided
by ZL3073x chip family. Each sub-device represents one of
the available DPLL channels.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
---
v3->v4:
* use static mfd cells
---
 drivers/mfd/zl3073x-core.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/mfd/zl3073x-core.c b/drivers/mfd/zl3073x-core.c
index d0022dfb0236c..a8971b86db121 100644
--- a/drivers/mfd/zl3073x-core.c
+++ b/drivers/mfd/zl3073x-core.c
@@ -7,6 +7,7 @@
 #include <linux/device.h>
 #include <linux/export.h>
 #include <linux/math64.h>
+#include <linux/mfd/core.h>
 #include <linux/mfd/zl3073x.h>
 #include <linux/module.h>
 #include <linux/netlink.h>
@@ -910,6 +911,14 @@ zl3073x_dev_state_fetch(struct zl3073x_dev *zldev)
 	return rc;
 }
 
+static const struct mfd_cell zl3073x_dpll_cells[] = {
+	MFD_CELL_BASIC("zl3073x-dpll", NULL, NULL, 0, 0),
+	MFD_CELL_BASIC("zl3073x-dpll", NULL, NULL, 0, 1),
+	MFD_CELL_BASIC("zl3073x-dpll", NULL, NULL, 0, 2),
+	MFD_CELL_BASIC("zl3073x-dpll", NULL, NULL, 0, 3),
+	MFD_CELL_BASIC("zl3073x-dpll", NULL, NULL, 0, 4),
+};
+
 /**
  * zl3073x_dev_probe - initialize zl3073x device
  * @zldev: pointer to zl3073x device
@@ -973,6 +982,16 @@ int zl3073x_dev_probe(struct zl3073x_dev *zldev,
 	if (rc)
 		return rc;
 
+	/* Add DPLL sub-device cell for each DPLL channel */
+	rc = devm_mfd_add_devices(zldev->dev, PLATFORM_DEVID_AUTO,
+				  zl3073x_dpll_cells, chip_info->num_channels,
+				  NULL, 0, NULL);
+	if (rc) {
+		dev_err_probe(zldev->dev, rc,
+			      "Failed to add DPLL sub-device\n");
+		return rc;
+	}
+
 	/* Register the device as devlink device */
 	devlink = priv_to_devlink(zldev);
 	devlink_register(devlink);
-- 
2.49.0