video, sm501: add OF binding to support SM501

- add binding to OF, compatible name "smi,sm501"

Signed-off-by: Heiko Schocher <hs@denx.de>
cc: linux-fbdev@vger.kernel.org
cc: devicetree-discuss@ozlabs.org
cc: Ben Dooks <ben@simtec.co.uk>
cc: Vincent Sanders <vince@simtec.co.uk>
cc: Samuel Ortiz <sameo@linux.intel.com>
cc: linux-kernel@vger.kernel.org
cc: Randy Dunlap <rdunlap@xenotime.net>
cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 39 insertions, 3 deletions

diff --git a/drivers/video/sm501fb.c b/drivers/video/sm501fb.c
index f31252ce8892..46d1a64fe80d 100644
--- a/drivers/video/sm501fb.c
+++ b/drivers/video/sm501fb.c
@@ -1729,6 +1729,15 @@ static int sm501fb_init_fb(struct fb_info *fb,
                 FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
                 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
 
+#if defined(CONFIG_OF)
+#ifdef __BIG_ENDIAN
+        if (of_get_property(info->dev->parent->of_node, "little-endian", NULL))
+                fb->flags |= FBINFO_FOREIGN_ENDIAN;
+#else
+        if (of_get_property(info->dev->parent->of_node, "big-endian", NULL))
+                fb->flags |= FBINFO_FOREIGN_ENDIAN;
+#endif
+#endif
         /* fixed data */
 
         fb->fix.type            = FB_TYPE_PACKED_PIXELS;
@@ -1765,14 +1774,17 @@ static int sm501fb_init_fb(struct fb_info *fb,
                         fb->var.xres_virtual = fb->var.xres;
                         fb->var.yres_virtual = fb->var.yres;
                 } else {
-                        if (info->edid_data)
+                        if (info->edid_data) {
                                 ret = fb_find_mode(&fb->var, fb, fb_mode,
                                         fb->monspecs.modedb,
                                         fb->monspecs.modedb_len,
                                         &sm501_default_mode, default_bpp);
-                        else
+                                /* edid_data is no longer needed, free it */
+                                kfree(info->edid_data);
+                        } else {
                                 ret = fb_find_mode(&fb->var, fb,
                                            NULL, NULL, 0, NULL, 8);
+                        }
 
                         switch (ret) {
                         case 1:
@@ -1933,8 +1945,32 @@ static int __devinit sm501fb_probe(struct platform_device *pdev)
         }
 
         if (info->pdata == NULL) {
-                dev_info(dev, "using default configuration data\n");
+                int found = 0;
+#if defined(CONFIG_OF)
+                struct device_node *np = pdev->dev.parent->of_node;
+                const u8 *prop;
+                const char *cp;
+                int len;
+
                 info->pdata = &sm501fb_def_pdata;
+                if (np) {
+                        /* Get EDID */
+                        cp = of_get_property(np, "mode", &len);
+                        if (cp)
+                                strcpy(fb_mode, cp);
+                        prop = of_get_property(np, "edid", &len);
+                        if (prop && len == EDID_LENGTH) {
+                                info->edid_data = kmemdup(prop, EDID_LENGTH,
+                                                          GFP_KERNEL);
+                                if (info->edid_data)
+                                        found = 1;
+                        }
+                }
+#endif
+                if (!found) {
+                        dev_info(dev, "using default configuration data\n");
+                        info->pdata = &sm501fb_def_pdata;
+                }
         }
 
         /* probe for the presence of each panel */