clk: tegra: dfll: Fix drvdata overwriting issue

Both tegra124-dfll and clk-dfll are using platform_set_drvdata
to set drvdata of the exact same pdev while they use different
pointers for the drvdata. Once the drvdata has been overwritten
by tegra124-dfll, clk-dfll will never get its td pointer as it
expects.

Since tegra124-dfll merely needs its soc pointer in its remove
function, this patch fixes the bug by removing the overwriting
in the tegra124-dfll file and letting the tegra_dfll_unregister
return an soc pointer for it.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/clk/tegra/clk-dfll.c b/drivers/clk/tegra/clk-dfll.c
index 2c44aeb0b97c..0a7deee74eea 100644
--- a/drivers/clk/tegra/clk-dfll.c
+++ b/drivers/clk/tegra/clk-dfll.c
@@ -1728,10 +1728,10 @@ EXPORT_SYMBOL(tegra_dfll_register);
  * @pdev: DFLL platform_device *
  *
  * Unbind this driver from the DFLL hardware device represented by
- * @pdev. The DFLL must be disabled for this to succeed. Returns 0
- * upon success or -EBUSY if the DFLL is still active.
+ * @pdev. The DFLL must be disabled for this to succeed. Returns a
+ * soc pointer upon success or -EBUSY if the DFLL is still active.
  */
-int tegra_dfll_unregister(struct platform_device *pdev)
+struct tegra_dfll_soc_data *tegra_dfll_unregister(struct platform_device *pdev)
 {
 	struct tegra_dfll *td = platform_get_drvdata(pdev);
 
@@ -1739,7 +1739,7 @@ int tegra_dfll_unregister(struct platform_device *pdev)
 	if (td->mode != DFLL_DISABLED) {
 		dev_err(&pdev->dev,
 			"must disable DFLL before removing driver\n");
-		return -EBUSY;
+		return ERR_PTR(-EBUSY);
 	}
 
 	debugfs_remove_recursive(td->debugfs_dir);
@@ -1753,6 +1753,6 @@ int tegra_dfll_unregister(struct platform_device *pdev)
 
 	reset_control_assert(td->dvco_rst);
 
-	return 0;
+	return td->soc;
 }
 EXPORT_SYMBOL(tegra_dfll_unregister);