ARM: shmobile: silk: add QSPI DT support

Define the SILK board dependent part of the QSPI device node.
Add device nodes  for Spansion  S25FL512S SPI flash and MTD partitions on it.

Based on the original patch by Vladimir Barinov
<vladimir.barinov@cogentembedded.com>.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/boot/dts/r8a7794-silk.dts b/arch/arm/boot/dts/r8a7794-silk.dts
index d4dd5a3..f49bc00 100644 (file)
--- a/arch/arm/boot/dts/r8a7794-silk.dts
+++ b/arch/arm/boot/dts/r8a7794-silk.dts
@@ -65,6 +65,11 @@
                renesas,groups = "mmc_data8", "mmc_ctrl";
                renesas,function = "mmc";
        };
+
+       qspi_pins: spi0 {
+               renesas,groups = "qspi_ctrl", "qspi_data4";
+               renesas,function = "qspi";
+       };
 };
 
 &scif2 {
@@ -100,3 +105,38 @@
        non-removable;
        status = "okay";
 };
+
+&qspi {
+       pinctrl-0 = <&qspi_pins>;
+       pinctrl-names = "default";
+
+       status = "okay";
+
+       flash@0 {
+               #address-cells = <1>;
+               #size-cells = <1>;
+               compatible = "spansion,s25fl512s", "jedec,spi-nor";
+               reg = <0>;
+               spi-max-frequency = <30000000>;
+               spi-tx-bus-width = <4>;
+               spi-rx-bus-width = <4>;
+               spi-cpol;
+               spi-cpha;
+               m25p,fast-read;
+
+               partition@0 {
+                       label = "loader";
+                       reg = <0x00000000 0x00040000>;
+                       read-only;
+               };
+               partition@40000 {
+                       label = "user";
+                       reg = <0x00040000 0x00400000>;
+                       read-only;
+               };
+               partition@440000 {
+                       label = "flash";
+                       reg = <0x00440000 0x03bc0000>;
+               };
+       };
+};