video: ARM CLCD: runtime check for Versatile

The current compile-time check for inversed IENB/CNTL does not
work in multiplatform boots: as soon as versatile is included
in the build, the IENB/CNTL is switched and breaks graphics.
Convert this to a runtime switch.

Cc: stable@vger.kernel.org
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Fixes: a29da136de34 ("ARM: versatile: convert to multi-platform")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 8 insertions, 7 deletions

diff --git a/drivers/video/fbdev/amba-clcd.c b/drivers/video/fbdev/amba-clcd.c
index fe274b5851c7..93e66a9148b9 100644
--- a/drivers/video/fbdev/amba-clcd.c
+++ b/drivers/video/fbdev/amba-clcd.c
@@ -440,13 +440,14 @@ static int clcdfb_register(struct clcd_fb *fb)
                 fb->off_ienb = CLCD_PL111_IENB;
                 fb->off_cntl = CLCD_PL111_CNTL;
         } else {
-#ifdef CONFIG_ARCH_VERSATILE
-                fb->off_ienb = CLCD_PL111_IENB;
-                fb->off_cntl = CLCD_PL111_CNTL;
-#else
-                fb->off_ienb = CLCD_PL110_IENB;
-                fb->off_cntl = CLCD_PL110_CNTL;
-#endif
+                if (of_machine_is_compatible("arm,versatile-ab") ||
+                    of_machine_is_compatible("arm,versatile-pb")) {
+                        fb->off_ienb = CLCD_PL111_IENB;
+                        fb->off_cntl = CLCD_PL111_CNTL;
+                } else {
+                        fb->off_ienb = CLCD_PL110_IENB;
+                        fb->off_cntl = CLCD_PL110_CNTL;
+                }
         }
 
         fb->clk = clk_get(&fb->dev->dev, NULL);