Merge branch 'fbdev-3.11' of git://gitorious.org/linux-omap-dss2/linu…

…x into fbdev/for-next

Documentation/devicetree/bindings/video/ssd1307fb.txt

@@ -1,13 +1,17 @@
 * Solomon SSD1307 Framebuffer Driver
 
 Required properties:
-  - compatible: Should be "solomon,ssd1307fb-<bus>". The only supported bus for
-    now is i2c.
+  - compatible: Should be "solomon,<chip>fb-<bus>". The only supported bus for
+    now is i2c, and the supported chips are ssd1306 and ssd1307.
   - reg: Should contain address of the controller on the I2C bus. Most likely
          0x3c or 0x3d
   - pwm: Should contain the pwm to use according to the OF device tree PWM
-         specification [0]
+         specification [0]. Only required for the ssd1307.
   - reset-gpios: Should contain the GPIO used to reset the OLED display
+  - solomon,height: Height in pixel of the screen driven by the controller
+  - solomon,width: Width in pixel of the screen driven by the controller
+  - solomon,page-offset: Offset of pages (band of 8 pixels) that the screen is
+    mapped to.
 
 Optional properties:
   - reset-active-low: Is the reset gpio is active on physical low?

drivers/video/of_display_timing.c

@@ -53,21 +53,16 @@ static int parse_timing_property(struct device_node *np, const char *name,
 }
 
 /**
- * of_get_display_timing - parse display_timing entry from device_node
+ * of_parse_display_timing - parse display_timing entry from device_node
  * @np: device_node with the properties
  **/
-static struct display_timing *of_get_display_timing(struct device_node *np)
+static int of_parse_display_timing(struct device_node *np,
+		struct display_timing *dt)
 {
-	struct display_timing *dt;
 	u32 val = 0;
 	int ret = 0;
 
-	dt = kzalloc(sizeof(*dt), GFP_KERNEL);
-	if (!dt) {
-		pr_err("%s: could not allocate display_timing struct\n",
-			of_node_full_name(np));
-		return NULL;
-	}
+	memset(dt, 0, sizeof(*dt));
 
 	ret |= parse_timing_property(np, "hback-porch", &dt->hback_porch);
 	ret |= parse_timing_property(np, "hfront-porch", &dt->hfront_porch);
@@ -101,12 +96,38 @@ static struct display_timing *of_get_display_timing(struct device_node *np)
 	if (ret) {
 		pr_err("%s: error reading timing properties\n",
 			of_node_full_name(np));
-		kfree(dt);
-		return NULL;
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * of_get_display_timing - parse a display_timing entry
+ * @np: device_node with the timing subnode
+ * @name: name of the timing node
+ * @dt: display_timing struct to fill
+ **/
+int of_get_display_timing(struct device_node *np, const char *name,
+		struct display_timing *dt)
+{
+	struct device_node *timing_np;
+
+	if (!np) {
+		pr_err("%s: no devicenode given\n", of_node_full_name(np));
+		return -EINVAL;
 	}
 
-	return dt;
+	timing_np = of_find_node_by_name(np, name);
+	if (!timing_np) {
+		pr_err("%s: could not find node '%s'\n",
+			of_node_full_name(np), name);
+		return -ENOENT;
+	}
+
+	return of_parse_display_timing(timing_np, dt);
 }
+EXPORT_SYMBOL_GPL(of_get_display_timing);
 
 /**
  * of_get_display_timings - parse all display_timing entries from a device_node
@@ -174,9 +195,17 @@ struct display_timings *of_get_display_timings(struct device_node *np)
 
 	for_each_child_of_node(timings_np, entry) {
 		struct display_timing *dt;
+		int r;
 
-		dt = of_get_display_timing(entry);
+		dt = kzalloc(sizeof(*dt), GFP_KERNEL);
 		if (!dt) {
+			pr_err("%s: could not allocate display_timing struct\n",
+					of_node_full_name(np));
+			goto timingfail;
+		}
+
+		r = of_parse_display_timing(entry, dt);
+		if (r) {
 			/*
 			 * to not encourage wrong devicetrees, fail in case of
 			 * an error