[media] v4l: mt9v032: Add OF support

Parse DT properties into a platform data structure when a DT node is
available.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/Documentation/devicetree/bindings/media/i2c/mt9v032.txt b/Documentation/devicetree/bindings/media/i2c/mt9v032.txt
new file mode 100644 (file)
index 0000000..2025653
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/mt9v032.txt
@@ -0,0 +1,39 @@
+* Aptina 1/3-Inch WVGA CMOS Digital Image Sensor
+
+The Aptina MT9V032 is a 1/3-inch CMOS active pixel digital image sensor with
+an active array size of 752H x 480V. It is programmable through a simple
+two-wire serial interface.
+
+Required Properties:
+
+- compatible: value should be either one among the following
+       (a) "aptina,mt9v022" for MT9V022 color sensor
+       (b) "aptina,mt9v022m" for MT9V022 monochrome sensor
+       (c) "aptina,mt9v024" for MT9V024 color sensor
+       (d) "aptina,mt9v024m" for MT9V024 monochrome sensor
+       (e) "aptina,mt9v032" for MT9V032 color sensor
+       (f) "aptina,mt9v032m" for MT9V032 monochrome sensor
+       (g) "aptina,mt9v034" for MT9V034 color sensor
+       (h) "aptina,mt9v034m" for MT9V034 monochrome sensor
+
+Optional Properties:
+
+- link-frequencies: List of allowed link frequencies in Hz. Each frequency is
+       expressed as a 64-bit big-endian integer.
+
+For further reading on port node refer to
+Documentation/devicetree/bindings/media/video-interfaces.txt.
+
+Example:
+
+       mt9v032@5c {
+               compatible = "aptina,mt9v032";
+               reg = <0x5c>;
+
+               port {
+                       mt9v032_out: endpoint {
+                               link-frequencies = /bits/ 64
+                                       <13000000 26600000 27000000>;
+                       };
+               };
+       };

diff --git a/MAINTAINERS b/MAINTAINERS
index b596508..97c174b 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6535,6 +6535,7 @@ M:        Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 L:     linux-media@vger.kernel.org
 T:     git git://linuxtv.org/media_tree.git
 S:     Maintained
+F:     Documentation/devicetree/bindings/media/i2c/mt9v032.txt
 F:     drivers/media/i2c/mt9v032.c
 F:     include/media/mt9v032.h
 

diff --git a/drivers/media/i2c/mt9v032.c b/drivers/media/i2c/mt9v032.c
index 6d64e23..977f400 100644 (file)
--- a/drivers/media/i2c/mt9v032.c
+++ b/drivers/media/i2c/mt9v032.c
@@ -17,6 +17,8 @@
 #include <linux/i2c.h>
 #include <linux/log2.h>
 #include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/videodev2.h>
@@ -26,6 +28,7 @@
 #include <media/mt9v032.h>
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
 #include <media/v4l2-subdev.h>
 
 /* The first four rows are black rows. The active area spans 753x481 pixels. */
@@ -876,10 +879,58 @@ static const struct regmap_config mt9v032_regmap_config = {
  * Driver initialization and probing
  */
 
+static struct mt9v032_platform_data *
+mt9v032_get_pdata(struct i2c_client *client)
+{
+       struct mt9v032_platform_data *pdata;
+       struct v4l2_of_endpoint endpoint;
+       struct device_node *np;
+       struct property *prop;
+
+       if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
+               return client->dev.platform_data;
+
+       np = of_graph_get_next_endpoint(client->dev.of_node, NULL);
+       if (!np)
+               return NULL;
+
+       if (v4l2_of_parse_endpoint(np, &endpoint) < 0)
+               goto done;
+
+       pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
+       if (!pdata)
+               goto done;
+
+       prop = of_find_property(np, "link-frequencies", NULL);
+       if (prop) {
+               u64 *link_freqs;
+               size_t size = prop->length / sizeof(*link_freqs);
+
+               link_freqs = devm_kcalloc(&client->dev, size,
+                                         sizeof(*link_freqs), GFP_KERNEL);
+               if (!link_freqs)
+                       goto done;
+
+               if (of_property_read_u64_array(np, "link-frequencies",
+                                              link_freqs, size) < 0)
+                       goto done;
+
+               pdata->link_freqs = link_freqs;
+               pdata->link_def_freq = link_freqs[0];
+       }
+
+       pdata->clk_pol = !!(endpoint.bus.parallel.flags &
+                           V4L2_MBUS_PCLK_SAMPLE_RISING);
+
+done:
+       of_node_put(np);
+       return pdata;
+}
+
 static int mt9v032_probe(struct i2c_client *client,
                const struct i2c_device_id *did)
 {
-       struct mt9v032_platform_data *pdata = client->dev.platform_data;
+       struct mt9v032_platform_data *pdata = mt9v032_get_pdata(client);
        struct mt9v032 *mt9v032;
        unsigned int i;
        int ret;
@@ -1037,9 +1088,25 @@ static const struct i2c_device_id mt9v032_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, mt9v032_id);
 
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id mt9v032_of_match[] = {
+       { .compatible = "aptina,mt9v022" },
+       { .compatible = "aptina,mt9v022m" },
+       { .compatible = "aptina,mt9v024" },
+       { .compatible = "aptina,mt9v024m" },
+       { .compatible = "aptina,mt9v032" },
+       { .compatible = "aptina,mt9v032m" },
+       { .compatible = "aptina,mt9v034" },
+       { .compatible = "aptina,mt9v034m" },
+       { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mt9v032_of_match);
+#endif
+
 static struct i2c_driver mt9v032_driver = {
        .driver = {
                .name = "mt9v032",
+               .of_match_table = of_match_ptr(mt9v032_of_match),
        },
        .probe          = mt9v032_probe,
        .remove         = mt9v032_remove,