[PATCH 1/2] dt-bindings: iommu/rockchip: Make clock properties optional

[Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>]

Rockchip IOMMUs are used without explicit clock handling for 4 years
now, so we should keep compatibility with old devicetrees if possible.
Therefore make iommu clocks optional.

Fixes: 8fa9eb39c614 ("dt-bindings: iommu/rockchip: Add clock property")
Signed-off-by: Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
---
 Documentation/devicetree/bindings/iommu/rockchip,iommu.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
index 6ecefea1c6f9..25bfad987513 100644
--- a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
+++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
@@ -14,13 +14,13 @@ Required properties:
                     "single-master" device, and needs no additional information
                     to associate with its master device.  See:
                     Documentation/devicetree/bindings/iommu/iommu.txt
+
+Optional properties:
 - clocks          : A list of clocks required for the IOMMU to be accessible by
                     the host CPU.
 - clock-names     : Should contain the following:
 	"iface" - Main peripheral bus clock (PCLK/HCL) (required)
 	"aclk"  - AXI bus clock (required)
-
-Optional properties:
 - rockchip,disable-mmu-reset : Don't use the mmu reset operation.
 			       Some mmu instances may produce unexpected results
 			       when the reset operation is used.
-- 
2.16.2