[PATCH 1/3] drm/etnaviv: add function to create etnaviv platform device

[Sui Jingfeng]

 This patch separate the code related to the platform device creation
 so that it can be reuse by other function.

 An immediate benefit is we need call of_node_put() only once in the
 for_each_compatible_node(np, NULL, "vivante,gc") loop instead of
 three.

Signed-off-by: Sui Jingfeng <15330273260 at 189.cn>
---
 drivers/gpu/drm/etnaviv/etnaviv_drv.c | 47 +++++++++++++++++++--------
 drivers/gpu/drm/etnaviv/etnaviv_drv.h |  4 +++
 2 files changed, 37 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.c b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
index 0b756ecb1bc2..69d879e623b8 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.c
@@ -659,10 +659,39 @@ static struct platform_driver etnaviv_platform_driver = {
 
 static struct platform_device *etnaviv_drm;
 
-static int __init etnaviv_init(void)
+int etnaviv_create_platform_device(const char *name,
+				   const char *data[],
+				   unsigned int num)
 {
 	struct platform_device *pdev;
 	int ret;
+
+	pdev = platform_device_alloc(name, PLATFORM_DEVID_NONE);
+	if (!pdev)
+		return -ENOMEM;
+
+	if (data && num) {
+		ret = platform_device_add_data(pdev, data, num * sizeof(char *));
+		if (ret) {
+			platform_device_put(pdev);
+			return ret;
+		}
+	}
+
+	ret = platform_device_add(pdev);
+	if (ret) {
+		platform_device_put(pdev);
+		return ret;
+	}
+
+	etnaviv_drm = pdev;
+
+	return 0;
+}
+
+static int __init etnaviv_init(void)
+{
+	int ret;
 	struct device_node *np;
 
 	etnaviv_validate_init();
@@ -683,22 +712,12 @@ static int __init etnaviv_init(void)
 		if (!of_device_is_available(np))
 			continue;
 
-		pdev = platform_device_alloc("etnaviv", PLATFORM_DEVID_NONE);
-		if (!pdev) {
-			ret = -ENOMEM;
-			of_node_put(np);
-			goto unregister_platform_driver;
-		}
+		of_node_put(np);
 
-		ret = platform_device_add(pdev);
-		if (ret) {
-			platform_device_put(pdev);
-			of_node_put(np);
+		ret = etnaviv_create_platform_device("etnaviv", NULL, 0);
+		if (ret)
 			goto unregister_platform_driver;
-		}
 
-		etnaviv_drm = pdev;
-		of_node_put(np);
 		break;
 	}
 
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_drv.h b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
index f32f4771dada..944001a21ca2 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_drv.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_drv.h
@@ -81,6 +81,10 @@ void etnaviv_gem_describe_objects(struct etnaviv_drm_private *priv,
 	struct seq_file *m);
 #endif
 
+int etnaviv_create_platform_device(const char *name,
+				   const char *data[],
+				   unsigned int num);
+
 #define DBG(fmt, ...) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
 #define VERB(fmt, ...) if (0) DRM_DEBUG(fmt"\n", ##__VA_ARGS__)
 
-- 
2.25.1