[PATCH] arm: mvebu: Espressobin: Enable 'mtd' command and define SPI NOR partitions

[Pali Rohár]

U-Boot now supports parsing SPI NOR partitions from Device Tree. So enable
'mtd' command support for Espressobin board and define partition layout in
U-Boot Espressobin DTS file. Access to SPI NOR via 'sf' command is old
method and 'mtd' command is now preferred variant.

>From include file remove '#define CONFIG_MTD_PARTITIONS' as this option is
now defined and enabled in defconfig file. This change is required to fix
compile error:

      CC      arch/arm/lib/asm-offsets.s
    In file included from include/config.h:4,
                     from include/common.h:16,
                     from lib/asm-offsets.c:14:
    include/configs/mvebu_armada-37xx.h:63: warning: "CONFIG_MTD_PARTITIONS" redefined
     #define CONFIG_MTD_PARTITIONS  /* required for UBI partition support */

    In file included from ././include/linux/kconfig.h:4,
                     from <command-line>:
    include/generated/autoconf.h:44: note: this is the location of the previous definition
     #define CONFIG_MTD_PARTITIONS 1

After enabling support for mtd command, output from 'mtd list' on
Espressobin board is:

    => mtd list
    List of MTD devices:
    * w25q32dw
      - device: spi-flash at 0
      - parent: spi at 10600
      - driver: jedec_spi_nor
      - path: /soc/internal-regs/spi at 10600/spi-flash at 0
      - type: NOR flash
      - block size: 0x1000 bytes
      - min I/O: 0x1 bytes
      - 0x000000000000-0x000000400000 : "w25q32dw"
              - 0x000000000000-0x0000003f0000 : "firmware"
              - 0x0000003f0000-0x000000400000 : "u-boot-env"
    =>

Signed-off-by: Pali Rohár <pali at kernel.org>
---
 arch/arm/dts/armada-3720-espressobin.dts    | 18 ++++++++++++++++++
 configs/mvebu_espressobin-88f3720_defconfig |  3 +++
 include/configs/mvebu_armada-37xx.h         |  5 -----
 3 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/arch/arm/dts/armada-3720-espressobin.dts b/arch/arm/dts/armada-3720-espressobin.dts
index d86d8f0b63cf..cba6139be690 100644
--- a/arch/arm/dts/armada-3720-espressobin.dts
+++ b/arch/arm/dts/armada-3720-espressobin.dts
@@ -164,6 +164,24 @@
 		reg = <0>; /* Chip select 0 */
 		spi-max-frequency = <50000000>;
 		m25p,fast-read;
+
+#ifdef CONFIG_ENV_IS_IN_SPI_FLASH
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition at firmware {
+				reg = <0 CONFIG_ENV_OFFSET>;
+				label = "firmware";
+			};
+
+			partition at u-boot-env {
+				reg = <CONFIG_ENV_OFFSET CONFIG_ENV_SIZE>;
+				label = "u-boot-env";
+			};
+		};
+#endif
 	};
 };
 
diff --git a/configs/mvebu_espressobin-88f3720_defconfig b/configs/mvebu_espressobin-88f3720_defconfig
index dc199cfe503b..78796115cd38 100644
--- a/configs/mvebu_espressobin-88f3720_defconfig
+++ b/configs/mvebu_espressobin-88f3720_defconfig
@@ -28,6 +28,7 @@ CONFIG_BOARD_LATE_INIT=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_MTD=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
@@ -54,6 +55,7 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_XENON=y
 CONFIG_MTD=y
+CONFIG_DM_MTD=y
 CONFIG_SF_DEFAULT_MODE=0
 CONFIG_SF_DEFAULT_SPEED=40000000
 CONFIG_SPI_FLASH_GIGADEVICE=y
@@ -62,6 +64,7 @@ CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_SPI_FLASH_MTD=y
 CONFIG_PHY_MARVELL=y
 CONFIG_PHY_GIGE=y
 CONFIG_E1000=y
diff --git a/include/configs/mvebu_armada-37xx.h b/include/configs/mvebu_armada-37xx.h
index a2bea2947dd1..c8c34d7d92dd 100644
--- a/include/configs/mvebu_armada-37xx.h
+++ b/include/configs/mvebu_armada-37xx.h
@@ -57,11 +57,6 @@
 #define CONFIG_I2C_MV
 #define CONFIG_SYS_I2C_SLAVE		0x0
 
-/*
- * SPI Flash configuration
- */
-#define CONFIG_MTD_PARTITIONS		/* required for UBI partition support */
-
 /*
  * Environment
  */
-- 
2.20.1