reset: sunxi: allow MFD subdevices probe

The current implementation uses sunxi_reset_init function for both early
init and platform device probe.

The sunxi_reset_init function uses DT to retrieve device resources, which
will be an issue if reset controllers are registered from an MFD device
that define resources from mfd_cell definition.

Moreover, we can make of devm functions when we're in the probe context.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 18 insertions, 3 deletions

diff --git a/drivers/reset/reset-sunxi.c b/drivers/reset/reset-sunxi.c
index 695bd3496eba..a94e7a7820b4 100644
--- a/drivers/reset/reset-sunxi.c
+++ b/drivers/reset/reset-sunxi.c
@@ -145,7 +145,24 @@ MODULE_DEVICE_TABLE(of, sunxi_reset_dt_ids);
 
 static int sunxi_reset_probe(struct platform_device *pdev)
 {
-        return sunxi_reset_init(pdev->dev.of_node);
+        struct sunxi_reset_data *data;
+        struct resource *res;
+
+        data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+        if (!data)
+                return -ENOMEM;
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        data->membase = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(data->membase))
+                return PTR_ERR(data->membase);
+
+        data->rcdev.owner = THIS_MODULE;
+        data->rcdev.nr_resets = resource_size(res) * 32;
+        data->rcdev.ops = &sunxi_reset_ops;
+        data->rcdev.of_node = pdev->dev.of_node;
+
+        return reset_controller_register(&data->rcdev);
 }
 
 static int sunxi_reset_remove(struct platform_device *pdev)
@@ -153,8 +170,6 @@ static int sunxi_reset_remove(struct platform_device *pdev)
         struct sunxi_reset_data *data = platform_get_drvdata(pdev);
 
         reset_controller_unregister(&data->rcdev);
-        iounmap(data->membase);
-        kfree(data);
 
         return 0;
 }