OMAP1: pass LCD config with omapfb_set_lcd_config()

LCD config for old omapfb driver is passed with OMAP_TAG_LCD from board
files or from the bootloader. In an effort to remove OMAP_TAG_LCD, this
patch adds omapfb_set_lcd_config() function that the board files can
call to set the LCD config.

This has the drawback that configuration can no longer come from the
bootloader. Of the boards supported by the kernel, this should only
affect N770 which depends on the data from the bootloader. This patch
adds an LCD config for N770 to its board files, but that is most
probably broken. Fixing this would need information about the HW setup
in N770 boards.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>

1 files changed, 16 insertions, 6 deletions

diff --git a/arch/arm/plat-omap/fb.c b/arch/arm/plat-omap/fb.c
index 45f35c983f44..24e62693b809 100644
--- a/arch/arm/plat-omap/fb.c
+++ b/arch/arm/plat-omap/fb.c
@@ -37,6 +37,7 @@
 
 #if defined(CONFIG_FB_OMAP) || defined(CONFIG_FB_OMAP_MODULE)
 
+static bool omapfb_lcd_configured;
 static struct omapfb_platform_data omapfb_config;
 
 static u64 omap_fb_dma_mask = ~(u32)0;
@@ -52,16 +53,21 @@ static struct platform_device omap_fb_device = {
         .num_resources = 0,
 };
 
-static int __init omap_init_fb(void)
+void __init omapfb_set_lcd_config(const struct omap_lcd_config *config)
 {
-        const struct omap_lcd_config *conf;
+        omapfb_config.lcd = *config;
+        omapfb_lcd_configured = true;
+}
 
-        conf = omap_get_config(OMAP_TAG_LCD, struct omap_lcd_config);
-        if (conf == NULL)
+static int __init omap_init_fb(void)
+{
+        /*
+         * If the board file has not set the lcd config with
+         * omapfb_set_lcd_config(), don't bother registering the omapfb device
+         */
+        if (!omapfb_lcd_configured)
                 return 0;
 
-        omapfb_config.lcd = *conf;
-
         return platform_device_register(&omap_fb_device);
 }
 
@@ -90,4 +96,8 @@ static int __init omap_init_fb(void)
 
 arch_initcall(omap_init_fb);
 
+#else
+
+void __init omapfb_set_lcd_config(omap_lcd_config *config) { }
+
 #endif