ARM: dts: r8a7742-iwg21m: Add SPI NOR support

Add support for the SPI NOR device used to boot up the system
to the System on Module DT.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Chris Paterson <Chris.Paterson2@renesas.com>
Link: https://lore.kernel.org/r/20200825085435.8744-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/arch/arm/boot/dts/r8a7742-iwg21m.dtsi b/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
index 0f26807f92b8ce0189733362794eacee176addc7..5621c9ed698f0e4aa969ae85e29f6252c882d590 100644 (file)
--- a/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
+++ b/arch/arm/boot/dts/r8a7742-iwg21m.dtsi
@@ -35,6 +35,16 @@
        clock-frequency = <20000000>;
 };
 
+&gpio0 {
+       /* GP0_18 set low to select QSPI. Doing so will disable VIN2 */
+       qspi_en {
+               gpio-hog;
+               gpios = <18 GPIO_ACTIVE_HIGH>;
+               output-low;
+               line-name = "QSPI_EN";
+       };
+};
+
 &i2c0 {
        pinctrl-0 = <&i2c0_pins>;
        pinctrl-names = "default";
@@ -70,4 +80,45 @@
                groups = "mmc1_data4", "mmc1_ctrl";
                function = "mmc1";
        };
+
+       qspi_pins: qspi {
+               groups = "qspi_ctrl", "qspi_data2";
+               function = "qspi";
+       };
+};
+
+&qspi {
+       pinctrl-0 = <&qspi_pins>;
+       pinctrl-names = "default";
+
+       status = "okay";
+
+       flash: flash@0 {
+               compatible = "sst,sst25vf016b", "jedec,spi-nor";
+               reg = <0>;
+               spi-max-frequency = <50000000>;
+               m25p,fast-read;
+               spi-cpol;
+               spi-cpha;
+
+               partitions {
+                       compatible = "fixed-partitions";
+                       #address-cells = <1>;
+                       #size-cells = <1>;
+
+                       partition@0 {
+                               label = "bootloader";
+                               reg = <0x00000000 0x000c0000>;
+                               read-only;
+                       };
+                       partition@c0000 {
+                               label = "env";
+                               reg = <0x000c0000 0x00002000>;
+                       };
+                       partition@c2000 {
+                               label = "user";
+                               reg = <0x000c2000 0x0013e000>;
+                       };
+               };
+       };
 };