Add documentation for 'xlnx,zynqmp-8.9a' SDHCI controller and optional
properties followed by example.

Signed-off-by: Manish Narani <manish.nar...@xilinx.com>
---
 .../devicetree/bindings/mmc/arasan,sdhci.txt          | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt 
b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
index 7425d52..d2058ee 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
@@ -15,6 +15,9 @@ Required Properties:
     - "arasan,sdhci-5.1": generic Arasan SDHCI 5.1 PHY
     - "rockchip,rk3399-sdhci-5.1", "arasan,sdhci-5.1": rk3399 eMMC PHY
       For this device it is strongly suggested to include 
arasan,soc-ctl-syscon.
+    - "xlnx,zynqmp-8.9a": ZynqMP SDHCI 8.9a PHY
+      For this device it is strongly suggested to include clock-output-names 
and
+      #clock-cells.
     - "ti,am654-sdhci-5.1", "arasan,sdhci-5.1": TI AM654 MMC PHY
        Note: This binding has been deprecated and moved to [5].
 
@@ -65,6 +68,10 @@ Optional Properties:
   controller while switching to particular speed mode. If not specified, driver
   will configure the default value defined for particular mode in it.
 
+  - xlnx,mio-bank: When specified, this will indicate the MIO bank number in
+    which the command and data lines are configured. If not specified, driver
+    will assume this as 0.
+
 Example:
        sdhci@e0100000 {
                compatible = "arasan,sdhci-8.9a";
@@ -100,3 +107,15 @@ Example:
                phy-names = "phy_arasan";
                #clock-cells = <0>;
        };
+
+       sdhci: mmc@ff160000 {
+               compatible = "xlnx,zynqmp-8.9a", "arasan,sdhci-8.9a";
+               interrupt-parent = <&gic>;
+               interrupts = <0 48 4>;
+               reg = <0x0 0xff160000 0x0 0x1000>;
+               clocks = <&clk200>, <&clk200>, <&sdhci 0>, <&sdhci 1>;
+               clock-names = "clk_xin", "clk_ahb", "clk_sdcard", "clk_sample";
+               clock-output-names = "clk_out_sd0", "clk_in_sd0";
+               #clock-cells = <1>;
+               clk-phase-sd-hs = <63>, <72>;
+       };
-- 
2.1.1

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