drm/i2c: tda998x: add DT support

This patch adds DT support to the tda998x.

Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index d31e1c170bb6..1ea4d43781f2 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -1172,6 +1172,8 @@ tda998x_encoder_init(struct i2c_client *client,
                     struct drm_encoder_slave *encoder_slave)
 {
         struct tda998x_priv *priv;
+        struct device_node *np = client->dev.of_node;
+        u32 video;
         int rev_lo, rev_hi, ret;
 
         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -1245,6 +1247,17 @@ tda998x_encoder_init(struct i2c_client *client,
         cec_write(priv, REG_CEC_FRO_IM_CLK_CTRL,
                         CEC_FRO_IM_CLK_CTRL_GHOST_DIS | CEC_FRO_IM_CLK_CTRL_IMCLK_SEL);
 
+        if (!np)
+                return 0;               /* non-DT */
+
+        /* get the optional video properties */
+        ret = of_property_read_u32(np, "video-ports", &video);
+        if (ret == 0) {
+                priv->vip_cntrl_0 = video >> 16;
+                priv->vip_cntrl_1 = video >> 8;
+                priv->vip_cntrl_2 = video;
+        }
+
         return 0;
 
 fail:
@@ -1259,6 +1272,14 @@ fail:
         return -ENXIO;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id tda998x_dt_ids[] = {
+        { .compatible = "nxp,tda998x", },
+        { }
+};
+MODULE_DEVICE_TABLE(of, tda998x_dt_ids);
+#endif
+
 static struct i2c_device_id tda998x_ids[] = {
         { "tda998x", 0 },
         { }
@@ -1271,6 +1292,7 @@ static struct drm_i2c_encoder_driver tda998x_driver = {
                 .remove = tda998x_remove,
                 .driver = {
                         .name = "tda998x",
+                        .of_match_table = of_match_ptr(tda998x_dt_ids),
                 },
                 .id_table = tda998x_ids,
         },