ARM: tegra: dts: cardhu: enable SLINK4

Enable SLINK4 and connected device in Tegra30 based
platform Cardhu.
Setting maximum spi frequency to 25MHz.

SPI serial flash is connected on CS1 of SLINK4 on
cardhu platform.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
[swarren: swapped reg/compatible order to be consistent]
Signed-off-by: Stephen Warren <swarren@nvidia.com>

2 files changed, 11 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 9de2b9ff9d6..ac2c2c416a1 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -51,4 +51,5 @@ ti	Texas Instruments
 via     VIA Technologies, Inc.
 wlf     Wolfson Microelectronics
 wm      Wondermedia Technologies, Inc.
+winbond Winbond Electronics corp.
 xlnx    Xilinx
diff --git a/arch/arm/boot/dts/tegra30-cardhu.dtsi b/arch/arm/boot/dts/tegra30-cardhu.dtsi
index b245e6cf633..bdb2a660f37 100644
--- a/arch/arm/boot/dts/tegra30-cardhu.dtsi
+++ b/arch/arm/boot/dts/tegra30-cardhu.dtsi
@@ -275,6 +275,16 @@
                 };
         };
 
+        spi@7000da00 {
+                status = "okay";
+                spi-max-frequency = <25000000>;
+                spi-flash@1 {
+                        compatible = "winbond,w25q32";
+                        reg = <1>;
+                        spi-max-frequency = <20000000>;
+                };
+        };
+
         ahub {
                 i2s@70080400 {
                         status = "okay";