[PATCH v2 next 1/2] dts: hisi: fixes no syscon error when init mdio

[yankejian <yankejian@huawei.com>]

Signed-nux start up, we get the log below:
"Hi-HNS_MDIO 803c0000.mdio: no syscon hisilicon,peri-c-subctrl
 mdio_bus mdio@803c0000: mdio sys ctl reg has not maped       "

the source code about the subctrl is dealled with syscon, but dts doesn't.
it cause such fault. so this patch adds the syscon info on dts files to
fixes it. and it adds documentation for the devicetree bindings used by
DT files of Hisilicon Hip05-D02 development board.

Signed-off-by: yankejian <yankejian@huawei.com>
---
change log:
v2:
 1) updates the related documented in the binding as well
 2) use the normal naming conventions using '-' instead of '_'

v1:
 initial version
---
 .../devicetree/bindings/arm/hisilicon/hisilicon.txt      | 16 ++++++++++++++++
 arch/arm64/boot/dts/hisilicon/hip05.dtsi                 |  5 +++++
 arch/arm64/boot/dts/hisilicon/hip05_hns.dtsi             |  4 ++--
 3 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt b/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
index 6ac7c00..9f05767 100644
--- a/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
+++ b/Documentation/devicetree/bindings/arm/hisilicon/hisilicon.txt
@@ -187,6 +187,22 @@ Example:
 		reg = <0xb0000000 0x10000>;
 	};
 
+Hisilicon HiP05 PERISUB system controller
+
+Required properties:
+- compatible : "hisilicon,peri-c-subctrl", "syscon";
+- reg : Register address and size
+
+The HiP05 PERISUB system controller is shared by peripheral controllers in
+HiP05 Soc to implement some basic configurations. the peripheral
+controllers include mdio, ddr, iic, uart, timer and so on.
+
+Example:
+	/* for HiP05 PCIe-SAS system */
+	peri-c-subctrl: sub-ctrl-c@80000000 {
+		compatible = "hisilicon,peri-c-subctrl", "syscon";
+		reg = <0x0 0x80000000 0x0 0x10000>;
+	};
 -----------------------------------------------------------------------
 Hisilicon CPU controller
 
diff --git a/arch/arm64/boot/dts/hisilicon/hip05.dtsi b/arch/arm64/boot/dts/hisilicon/hip05.dtsi
index 4ff16d0..5fec740 100644
--- a/arch/arm64/boot/dts/hisilicon/hip05.dtsi
+++ b/arch/arm64/boot/dts/hisilicon/hip05.dtsi
@@ -246,6 +246,11 @@
 			clock-frequency = <200000000>;
 		};
 
+		peri_c_subctrl: sub-ctrl-c@80000000 {
+			compatible = "hisilicon,peri-c-subctrl", "syscon";
+			reg = < 0x0 0x80000000 0x0 0x10000>;
+		};
+
 		uart0: uart@80300000 {
 			compatible = "snps,dw-apb-uart";
 			reg = <0x0 0x80300000 0x0 0x10000>;
diff --git a/arch/arm64/boot/dts/hisilicon/hip05_hns.dtsi b/arch/arm64/boot/dts/hisilicon/hip05_hns.dtsi
index 606dd5a..da7b6e6 100644
--- a/arch/arm64/boot/dts/hisilicon/hip05_hns.dtsi
+++ b/arch/arm64/boot/dts/hisilicon/hip05_hns.dtsi
@@ -10,8 +10,8 @@ soc0: soc@000000000 {
 		#address-cells = <1>;
 		#size-cells = <0>;
 		compatible = "hisilicon,hns-mdio";
-		reg = <0x0 0x803c0000 0x0 0x10000
-		       0x0 0x80000000 0x0 0x10000>;
+		reg = <0x0 0x803c0000 0x0 0x10000>;
+		subctrl-vbase = <&peri_c_subctrl>;
 
 		soc0_phy0: ethernet-phy@0 {
 			reg = <0x0>;
-- 
1.9.1