OMAPDSS: register dss drivers in module init

We do the dss driver registration in a rather strange way: we have the
higher level omapdss driver, and we use that driver's probe function to
register the drivers for the rest of the dss devices.

There doesn't seem to be any reason for that, and additionally the
soon-to-be-merged patch "ARM: OMAP: omap_device: remove
omap_device_parent" will break omapdss initialization with the current
registration model.

This patch changes the registration for all drivers to happen at the
same place, in the init of the module.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

drivers/video/omap2/dss/core.c

@@ -183,42 +183,6 @@ static int omap_dss_probe(struct platform_device *pdev)
 	dss_init_overlay_managers(pdev);
 	dss_init_overlays(pdev);
 
-	r = dss_init_platform_driver();
-	if (r) {
-		DSSERR("Failed to initialize DSS platform driver\n");
-		goto err_dss;
-	}
-
-	r = dispc_init_platform_driver();
-	if (r) {
-		DSSERR("Failed to initialize dispc platform driver\n");
-		goto err_dispc;
-	}
-
-	r = rfbi_init_platform_driver();
-	if (r) {
-		DSSERR("Failed to initialize rfbi platform driver\n");
-		goto err_rfbi;
-	}
-
-	r = venc_init_platform_driver();
-	if (r) {
-		DSSERR("Failed to initialize venc platform driver\n");
-		goto err_venc;
-	}
-
-	r = dsi_init_platform_driver();
-	if (r) {
-		DSSERR("Failed to initialize DSI platform driver\n");
-		goto err_dsi;
-	}
-
-	r = hdmi_init_platform_driver();
-	if (r) {
-		DSSERR("Failed to initialize hdmi\n");
-		goto err_hdmi;
-	}
-
 	r = dss_initialize_debugfs();
 	if (r)
 		goto err_debugfs;
@@ -246,18 +210,6 @@ static int omap_dss_probe(struct platform_device *pdev)
 err_register:
 	dss_uninitialize_debugfs();
 err_debugfs:
-	hdmi_uninit_platform_driver();
-err_hdmi:
-	dsi_uninit_platform_driver();
-err_dsi:
-	venc_uninit_platform_driver();
-err_venc:
-	dispc_uninit_platform_driver();
-err_dispc:
-	rfbi_uninit_platform_driver();
-err_rfbi:
-	dss_uninit_platform_driver();
-err_dss:
 
 	return r;
 }
@@ -269,13 +221,6 @@ static int omap_dss_remove(struct platform_device *pdev)
 
 	dss_uninitialize_debugfs();
 
-	hdmi_uninit_platform_driver();
-	dsi_uninit_platform_driver();
-	venc_uninit_platform_driver();
-	rfbi_uninit_platform_driver();
-	dispc_uninit_platform_driver();
-	dss_uninit_platform_driver();
-
 	dss_uninit_overlays(pdev);
 	dss_uninit_overlay_managers(pdev);
 
@@ -525,6 +470,80 @@ static int omap_dss_bus_register(void)
 
 /* INIT */
 
+static int __init omap_dss_register_drivers(void)
+{
+	int r;
+
+	r = platform_driver_register(&omap_dss_driver);
+	if (r)
+		return r;
+
+	r = dss_init_platform_driver();
+	if (r) {
+		DSSERR("Failed to initialize DSS platform driver\n");
+		goto err_dss;
+	}
+
+	r = dispc_init_platform_driver();
+	if (r) {
+		DSSERR("Failed to initialize dispc platform driver\n");
+		goto err_dispc;
+	}
+
+	r = rfbi_init_platform_driver();
+	if (r) {
+		DSSERR("Failed to initialize rfbi platform driver\n");
+		goto err_rfbi;
+	}
+
+	r = venc_init_platform_driver();
+	if (r) {
+		DSSERR("Failed to initialize venc platform driver\n");
+		goto err_venc;
+	}
+
+	r = dsi_init_platform_driver();
+	if (r) {
+		DSSERR("Failed to initialize DSI platform driver\n");
+		goto err_dsi;
+	}
+
+	r = hdmi_init_platform_driver();
+	if (r) {
+		DSSERR("Failed to initialize hdmi\n");
+		goto err_hdmi;
+	}
+
+	return 0;
+
+err_hdmi:
+	dsi_uninit_platform_driver();
+err_dsi:
+	venc_uninit_platform_driver();
+err_venc:
+	rfbi_uninit_platform_driver();
+err_rfbi:
+	dispc_uninit_platform_driver();
+err_dispc:
+	dss_uninit_platform_driver();
+err_dss:
+	platform_driver_unregister(&omap_dss_driver);
+
+	return r;
+}
+
+static void __exit omap_dss_unregister_drivers(void)
+{
+	hdmi_uninit_platform_driver();
+	dsi_uninit_platform_driver();
+	venc_uninit_platform_driver();
+	rfbi_uninit_platform_driver();
+	dispc_uninit_platform_driver();
+	dss_uninit_platform_driver();
+
+	platform_driver_unregister(&omap_dss_driver);
+}
+
 #ifdef CONFIG_OMAP2_DSS_MODULE
 static void omap_dss_bus_unregister(void)
 {
@@ -541,7 +560,7 @@ static int __init omap_dss_init(void)
 	if (r)
 		return r;
 
-	r = platform_driver_register(&omap_dss_driver);
+	r = omap_dss_register_drivers();
 	if (r) {
 		omap_dss_bus_unregister();
 		return r;
@@ -562,7 +581,7 @@ static void __exit omap_dss_exit(void)
 		core.vdds_sdi_reg = NULL;
 	}
 
-	platform_driver_unregister(&omap_dss_driver);
+	omap_dss_unregister_drivers();
 
 	omap_dss_bus_unregister();
 }
@@ -577,7 +596,7 @@ static int __init omap_dss_init(void)
 
 static int __init omap_dss_init2(void)
 {
-	return platform_driver_register(&omap_dss_driver);
+	return omap_dss_register_drivers();
 }
 
 core_initcall(omap_dss_init);