OMAPDSS: encoder-tfp410: Add DT support

Add DT support for encoder-tfp410.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Archit Taneja <archit@ti.com>

1 files changed, 42 insertions, 1 deletions

diff --git a/drivers/video/omap2/displays-new/encoder-tfp410.c b/drivers/video/omap2/displays-new/encoder-tfp410.c
index 4a291e756be9..b4e9a42a79e6 100644
--- a/drivers/video/omap2/displays-new/encoder-tfp410.c
+++ b/drivers/video/omap2/displays-new/encoder-tfp410.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
+#include <linux/of_gpio.h>
 
 #include <video/omapdss.h>
 #include <video/omap-panel-data.h>
@@ -82,7 +83,8 @@ static int tfp410_enable(struct omap_dss_device *dssdev)
                 return 0;
 
         in->ops.dpi->set_timings(in, &ddata->timings);
-        in->ops.dpi->set_data_lines(in, ddata->data_lines);
+        if (ddata->data_lines)
+                in->ops.dpi->set_data_lines(in, ddata->data_lines);
 
         r = in->ops.dpi->enable(in);
         if (r)
@@ -179,6 +181,33 @@ static int tfp410_probe_pdata(struct platform_device *pdev)
         return 0;
 }
 
+static int tfp410_probe_of(struct platform_device *pdev)
+{
+        struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+        struct device_node *node = pdev->dev.of_node;
+        struct omap_dss_device *in;
+        int gpio;
+
+        gpio = of_get_named_gpio(node, "powerdown-gpios", 0);
+
+        if (gpio_is_valid(gpio) || gpio == -ENOENT) {
+                ddata->pd_gpio = gpio;
+        } else {
+                dev_err(&pdev->dev, "failed to parse PD gpio\n");
+                return gpio;
+        }
+
+        in = omapdss_of_find_source_for_first_ep(node);
+        if (IS_ERR(in)) {
+                dev_err(&pdev->dev, "failed to find video source\n");
+                return PTR_ERR(in);
+        }
+
+        ddata->in = in;
+
+        return 0;
+}
+
 static int tfp410_probe(struct platform_device *pdev)
 {
         struct panel_drv_data *ddata;
@@ -195,6 +224,10 @@ static int tfp410_probe(struct platform_device *pdev)
                 r = tfp410_probe_pdata(pdev);
                 if (r)
                         return r;
+        } else if (pdev->dev.of_node) {
+                r = tfp410_probe_of(pdev);
+                if (r)
+                        return r;
         } else {
                 return -ENODEV;
         }
@@ -251,12 +284,20 @@ static int __exit tfp410_remove(struct platform_device *pdev)
         return 0;
 }
 
+static const struct of_device_id tfp410_of_match[] = {
+        { .compatible = "omapdss,ti,tfp410", },
+        {},
+};
+
+MODULE_DEVICE_TABLE(of, tfp410_of_match);
+
 static struct platform_driver tfp410_driver = {
         .probe  = tfp410_probe,
         .remove = __exit_p(tfp410_remove),
         .driver = {
                 .name   = "tfp410",
                 .owner  = THIS_MODULE,
+                .of_match_table = tfp410_of_match,
         },
 };