OMAPDSS: panel-dsi-cm: Add DT support

Add DT support for panel-dsi-cm.

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

1 files changed, 56 insertions, 4 deletions

diff --git a/drivers/video/omap2/displays-new/panel-dsi-cm.c b/drivers/video/omap2/displays-new/panel-dsi-cm.c
index b7baafe83aa3..a647e94c8b08 100644
--- a/drivers/video/omap2/displays-new/panel-dsi-cm.c
+++ b/drivers/video/omap2/displays-new/panel-dsi-cm.c
@@ -22,6 +22,8 @@
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
 
 #include <video/omapdss.h>
 #include <video/omap-panel-data.h>
@@ -595,10 +597,13 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
                 .lp_clk_max = 10000000,
         };
 
-        r = in->ops.dsi->configure_pins(in, &ddata->pin_config);
-        if (r) {
-                dev_err(&ddata->pdev->dev, "failed to configure DSI pins\n");
-                goto err0;
+        if (ddata->pin_config.num_pins > 0) {
+                r = in->ops.dsi->configure_pins(in, &ddata->pin_config);
+                if (r) {
+                        dev_err(&ddata->pdev->dev,
+                                "failed to configure DSI pins\n");
+                        goto err0;
+                }
         }
 
         r = in->ops.dsi->set_config(in, &dsi_config);
@@ -1156,6 +1161,41 @@ static int dsicm_probe_pdata(struct platform_device *pdev)
         return 0;
 }
 
+static int dsicm_probe_of(struct platform_device *pdev)
+{
+        struct device_node *node = pdev->dev.of_node;
+        struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+        struct omap_dss_device *in;
+        int gpio;
+
+        gpio = of_get_named_gpio(node, "reset-gpios", 0);
+        if (!gpio_is_valid(gpio)) {
+                dev_err(&pdev->dev, "failed to parse reset gpio\n");
+                return gpio;
+        }
+        ddata->reset_gpio = gpio;
+
+        gpio = of_get_named_gpio(node, "te-gpios", 0);
+        if (gpio_is_valid(gpio) || gpio == -ENOENT) {
+                ddata->ext_te_gpio = gpio;
+        } else {
+                dev_err(&pdev->dev, "failed to parse TE 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;
+
+        /* TODO: ulps, backlight */
+
+        return 0;
+}
+
 static int dsicm_probe(struct platform_device *pdev)
 {
         struct backlight_properties props;
@@ -1178,6 +1218,10 @@ static int dsicm_probe(struct platform_device *pdev)
                 r = dsicm_probe_pdata(pdev);
                 if (r)
                         return r;
+        } else if (pdev->dev.of_node) {
+                r = dsicm_probe_of(pdev);
+                if (r)
+                        return r;
         } else {
                 return -ENODEV;
         }
@@ -1320,12 +1364,20 @@ static int __exit dsicm_remove(struct platform_device *pdev)
         return 0;
 }
 
+static const struct of_device_id dsicm_of_match[] = {
+        { .compatible = "omapdss,panel-dsi-cm", },
+        {},
+};
+
+MODULE_DEVICE_TABLE(of, dsicm_of_match);
+
 static struct platform_driver dsicm_driver = {
         .probe = dsicm_probe,
         .remove = __exit_p(dsicm_remove),
         .driver = {
                 .name = "panel-dsi-cm",
                 .owner = THIS_MODULE,
+                .of_match_table = dsicm_of_match,
         },
 };