# \[PATCH 12/21\] drm/tegra: Probe dpaux devices on demand

- From: Tomeu Vizoso \<hidden\>
- Date: 2015-05-25 14:58:36 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2015/05/4501598
- Thread: https://ratatoskr.run/linux-arm-kernel/2015/05/4501586/t.md

```text
When looking up a dpaux device through its DT node, ensure that the
corresponding device has been registered.

Signed-off-by: Tomeu Vizoso <redacted>
---
 drivers/gpu/drm/tegra/dpaux.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index d6b55e3..10bba41 100644
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -12,6 +12,7 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/of_gpio.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>
 #include <linux/regulator/consumer.h>
@@ -397,6 +398,8 @@ struct tegra_dpaux *tegra_dpaux_find_by_of_node(struct device_node *np)
 {
 	struct tegra_dpaux *dpaux;
 
+	of_platform_device_ensure(np);
+
 	mutex_lock(&dpaux_lock);
 
 	list_for_each_entry(dpaux, &dpaux_list, list)
-- 
2.4.1
```