ARM: dts: exynos542x: move mfc device into own bus with limited dma-range

MFC block does not support setting address base to 0, what is the default
value when using generic iommu based dma-mapping. This patch adds
additional virtual bus (with dma ranges limited to 0x10000000..0x20000000)
only for MFC device, so it gets proper dma mapping configuration. This is
a workaround until proper configuration of default dma window gets
implemented.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 8c84bed..3c82e57 100644 (file)
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -172,15 +172,23 @@
                clock-names = "pll_ref", "pll_in", "sclk_audio", "sclk_pcm_in";
        };
 
-       mfc: codec@11000000 {
-               compatible = "samsung,mfc-v7";
-               reg = <0x11000000 0x10000>;
-               interrupts = <0 96 0>;
-               clocks = <&clock CLK_MFC>;
-               clock-names = "mfc";
-               power-domains = <&mfc_pd>;
-               iommus = <&sysmmu_mfc_l>, <&sysmmu_mfc_r>;
-               iommu-names = "left", "right";
+       mfc-bus {
+               compatible = "simple-bus";
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges;
+               dma-ranges = <0x10000000 0x0 0x10000000>;
+
+               mfc: codec@11000000 {
+                       compatible = "samsung,mfc-v7";
+                       reg = <0x11000000 0x10000>;
+                       interrupts = <0 96 0>;
+                       clocks = <&clock CLK_MFC>;
+                       clock-names = "mfc";
+                       power-domains = <&mfc_pd>;
+                       iommus = <&sysmmu_mfc_l>, <&sysmmu_mfc_r>;
+                       iommu-names = "left", "right";
+               };
        };
 
        mmc_0: mmc@12200000 {