karo: fdt: get LVDS mapping and bus width from DT

[karo-tx-uboot.git] / board / karo / common / fdt.c

diff --git a/board/karo/common/fdt.c b/board/karo/common/fdt.c
index 8acdb85ebc7f45a8daff19b09530194c94fdd6cc..2322447986c1f3b7d873e9b6fabcfb805a660e38 100644 (file)
--- a/board/karo/common/fdt.c
+++ b/board/karo/common/fdt.c
@@ -314,7 +314,7 @@ out:
 
 static inline int karo_fdt_flexcan_enabled(void *blob)
 {
-       const char *can_ifs[] = {
+       static const char *can_ifs[] = {
                "can0",
                "can1",
        };
@@ -747,3 +747,56 @@ int karo_fdt_update_fb_mode(void *blob, const char *name)
                return fdt_update_native_fb_mode(blob, off);
        return off;
 }
+
+int karo_fdt_get_lcd_bus_width(const void *blob, int default_width)
+{
+       int off = fdt_path_offset(blob, "display");
+
+       if (off >= 0) {
+               const uint32_t *prop;
+
+               prop = fdt_getprop(blob, off, "fsl,data-width", NULL);
+               if (prop)
+                       return fdt32_to_cpu(*prop);
+       }
+       return default_width;
+}
+
+int karo_fdt_get_lvds_mapping(const void *blob, int default_mapping)
+{
+       int off = fdt_path_offset(blob, "display");
+
+       if (off >= 0) {
+               const char *prop;
+
+               prop = fdt_getprop(blob, off, "fsl,data-mapping", NULL);
+               if (prop)
+                       return strcmp(prop, "jeida") == 0;
+       }
+       return default_mapping;
+}
+
+u8 karo_fdt_get_lvds_channels(const void *blob)
+{
+       static const char *lvds_chans[] = {
+               "lvds0",
+               "lvds1",
+       };
+       u8 lvds_chan_mask = 0;
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(lvds_chans); i++) {
+               const char *status;
+               int off = fdt_path_offset(blob, lvds_chans[i]);
+
+               if (off < 0)
+                       continue;
+
+               status = fdt_getprop(blob, off, "status", NULL);
+               if (status && strcmp(status, "okay") == 0) {
+                       debug("%s is enabled\n", lvds_chans[i]);
+                       lvds_chan_mask |= 1 << i;
+               }
+       }
+       return lvds_chan_mask;
+}