[PATCH v4 4/4] drm/armada: Convert the probe function to the generic drm_of_component_probe()
From: Liviu Dudau
Date: Tue Oct 20 2015 - 05:24:51 EST
The armada DRM driver keeps some old platform data compatibility in the
probe function that makes moving to the generic drm_of_component_probe()
a bit more complicated that it should. Refactor the probe function to do
the platform_data processing after the generic probe (and only if that
fails). This way future cleanup can further remove support for it.
Signed-off-by: Liviu Dudau <Liviu.Dudau@xxxxxxx>
Acked-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/armada/armada_drv.c | 68 +++++++++++--------------------------
1 file changed, 19 insertions(+), 49 deletions(-)
diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index 63d909e..3a7ba69 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -11,6 +11,7 @@
#include <linux/of_graph.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/drm_of.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_gem.h"
@@ -265,43 +266,29 @@ static void armada_add_endpoints(struct device *dev,
}
}
-static int armada_drm_find_components(struct device *dev,
- struct component_match **match)
-{
- struct device_node *port;
- int i;
-
- if (dev->of_node) {
- struct device_node *np = dev->of_node;
-
- for (i = 0; ; i++) {
- port = of_parse_phandle(np, "ports", i);
- if (!port)
- break;
-
- component_match_add(dev, match, compare_of, port);
- of_node_put(port);
- }
+static const struct component_master_ops armada_master_ops = {
+ .bind = armada_drm_bind,
+ .unbind = armada_drm_unbind,
+};
- if (i == 0) {
- dev_err(dev, "missing 'ports' property\n");
- return -ENODEV;
- }
+static int armada_drm_probe(struct platform_device *pdev)
+{
+ struct component_match *match = NULL;
+ struct device *dev = &pdev->dev;
+ int ret;
- for (i = 0; ; i++) {
- port = of_parse_phandle(np, "ports", i);
- if (!port)
- break;
+ ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
+ if (ret != -EINVAL)
+ return ret;
- armada_add_endpoints(dev, match, port);
- of_node_put(port);
- }
- } else if (dev->platform_data) {
+ if (dev->platform_data) {
char **devices = dev->platform_data;
+ struct device_node *port;
struct device *d;
+ int i;
for (i = 0; devices[i]; i++)
- component_match_add(dev, match, compare_dev_name,
+ component_match_add(dev, &match, compare_dev_name,
devices[i]);
if (i == 0) {
@@ -311,32 +298,15 @@ static int armada_drm_find_components(struct device *dev,
for (i = 0; devices[i]; i++) {
d = bus_find_device_by_name(&platform_bus_type, NULL,
- devices[i]);
+ devices[i]);
if (d && d->of_node) {
for_each_child_of_node(d->of_node, port)
- armada_add_endpoints(dev, match, port);
+ armada_add_endpoints(dev, &match, port);
}
put_device(d);
}
}
- return 0;
-}
-
-static const struct component_master_ops armada_master_ops = {
- .bind = armada_drm_bind,
- .unbind = armada_drm_unbind,
-};
-
-static int armada_drm_probe(struct platform_device *pdev)
-{
- struct component_match *match = NULL;
- int ret;
-
- ret = armada_drm_find_components(&pdev->dev, &match);
- if (ret < 0)
- return ret;
-
return component_master_add_with_match(&pdev->dev, &armada_master_ops,
match);
}
--
2.6.0
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/