ARM: rmobile: Enable RPC QSPI on R8A77970 V3M Eagle

Enable the RPC QSPI driver on R8A77970 V3M Eagle and configure
the environment layout to match that used by old U-Boot.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/arm/dts/r8a77970-eagle.dts

@@ -17,6 +17,7 @@
 	aliases {
 		serial0 = &scif0;
 		ethernet0 = &avb;
+		spi0 = &rpc;
 	};
 
 	chosen {
@@ -59,6 +60,25 @@
 	};
 };
 
+&rpc {
+	num-cs = <1>;
+	status = "okay";
+	spi-max-frequency = <50000000>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	flash0: spi-flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "s25fs512s", "spi-flash", "jedec,spi-nor";
+		spi-max-frequency = <50000000>;
+		spi-tx-bus-width = <1>;
+		spi-rx-bus-width = <1>;
+		reg = <0>;
+		status = "okay";
+	};
+};
+
 &scif0 {
 	pinctrl-0 = <&scif0_pins>;
 	pinctrl-names = "default";

configs/r8a77970_eagle_defconfig

@@ -18,6 +18,8 @@ CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
@@ -28,6 +30,7 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_CONTROL=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_REGMAP=y
 CONFIG_SYSCON=y
 CONFIG_CLK=y
@@ -41,6 +44,10 @@ CONFIG_MMC_IO_VOLTAGE=y
 CONFIG_MMC_UHS_SUPPORT=y
 CONFIG_MMC_HS200_SUPPORT=y
 CONFIG_RENESAS_SDHI=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_PHY_MICREL=y
 CONFIG_PHY_MICREL_KSZ90X1=y
 CONFIG_DM_ETH=y
@@ -52,6 +59,8 @@ CONFIG_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SCIF_CONSOLE=y
+CONFIG_DM_SPI=y
+CONFIG_RENESAS_RPC_SPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_XHCI_HCD=y

include/configs/eagle.h

@@ -19,6 +19,12 @@
 #define CONFIG_BITBANGMII
 #define CONFIG_BITBANGMII_MULTI
 
+/* Environment compatibility */
+#undef CONFIG_ENV_SIZE_REDUND
+#undef CONFIG_ENV_SECT_SIZE
+#define CONFIG_ENV_SECT_SIZE	(256 * 1024)
+#define CONFIG_ENV_OFFSET	0x700000
+
 /* Board Clock */
 /* XTAL_CLK : 33.33MHz */
 #define CONFIG_SYS_CLK_FREQ	33333333u