[PATCH] gxfb: Support command line options

Add support for command line options for setting the mode and various
settings.

[akpm@osdl.org: cleanups]
Signed-off-by: NJordan Crouse <jordan.crouse@amd.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Acked-by: NJames Simmons <jsimmons@infradead.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/video/geode/gxfb_core.c

@@ -35,10 +35,10 @@
 #include "display_gx.h"
 #include "video_gx.h"
 
-static char mode_option[32] = "640x480-16@60";
+static char *mode_option;
 
 /* Modes relevant to the GX (taken from modedb.c) */
-static const struct fb_videomode __initdata gx_modedb[] = {
+static const struct fb_videomode gx_modedb[] __initdata = {
 	/* 640x480-60 VESA */
 	{ NULL, 60, 640, 480, 39682,  48, 16, 33, 10, 96, 2,
 	  0, FB_VMODE_NONINTERLACED, FB_MODE_IS_VESA },
@@ -341,7 +341,8 @@ static int __init gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *i
 		goto err;
 	}
 
-        /* Clear the frame buffer of garbage. */
+
+	/* Clear the frame buffer of garbage. */
         memset_io(info->screen_base, 0, info->fix.smem_len);
 
 	gxfb_check_var(&info->var, info);
@@ -411,11 +412,35 @@ static struct pci_driver gxfb_driver = {
 	.remove		= gxfb_remove,
 };
 
+#ifndef MODULE
+static int __init gxfb_setup(char *options)
+{
+
+	char *opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((opt = strsep(&options, ",")) != NULL) {
+		if (!*opt)
+			continue;
+
+		mode_option = opt;
+	}
+
+	return 0;
+}
+#endif
+
 static int __init gxfb_init(void)
 {
 #ifndef MODULE
-	if (fb_get_options("gxfb", NULL))
+	char *option = NULL;
+
+	if (fb_get_options("gxfb", &option))
 		return -ENODEV;
+
+	gxfb_setup(option);
 #endif
 	return pci_register_driver(&gxfb_driver);
 }
@@ -428,8 +453,8 @@ static void __exit gxfb_cleanup(void)
 module_init(gxfb_init);
 module_exit(gxfb_cleanup);
 
-module_param_string(mode, mode_option, sizeof(mode_option), 0444);
-MODULE_PARM_DESC(mode, "video mode (<x>x<y>[-<bpp>][@<refr>])");
+module_param(mode_option, charp, 0);
+MODULE_PARM_DESC(mode_option, "video mode (<x>x<y>[-<bpp>][@<refr>])");
 
 MODULE_DESCRIPTION("Framebuffer driver for the AMD Geode GX");
 MODULE_LICENSE("GPL");