arm: mvebu: switch clearfog to use device-tree i2c and gpio

This switches the clearfog boards to use DM based gpio and i2c
drivers.  The io expanders are configured via their device-tree
entries.

Signed-off-by: Jon Nettleton <jon@solid-run.com>
[baruch: add DT i2c aliases]
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>

arch/arm/dts/armada-388-clearfog.dts

@@ -62,6 +62,8 @@
 		ethernet2 = &eth1;
 		ethernet3 = &eth2;
 		spi1 = &spi1;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
 	};
 
 	chosen {

board/solidrun/clearfog/clearfog.c

@@ -32,22 +32,6 @@ DECLARE_GLOBAL_DATA_PTR;
 #define BOARD_GPP_POL_LOW	0x0
 #define BOARD_GPP_POL_MID	0x0
 
-/* IO expander on Marvell GP board includes e.g. fan enabling */
-struct marvell_io_exp {
-	u8 chip;
-	u8 addr;
-	u8 val;
-};
-
-static struct marvell_io_exp io_exp[] = {
-	{ 0x20, 2, 0x40 },	/* Deassert both mini pcie reset signals */
-	{ 0x20, 6, 0xf9 },
-	{ 0x20, 2, 0x46 },	/* rst signals and ena USB3 current limiter */
-	{ 0x20, 6, 0xb9 },
-	{ 0x20, 3, 0x00 },	/* Set SFP_TX_DIS to zero */
-	{ 0x20, 7, 0xbf },	/* Drive SFP_TX_DIS to zero */
-};
-
 static struct serdes_map board_serdes_map[] = {
 	{SATA0, SERDES_SPEED_3_GBPS, SERDES_DEFAULT_MODE, 0, 0},
 	{SGMII1, SERDES_SPEED_1_25_GBPS, SERDES_DEFAULT_MODE, 0, 0},
@@ -126,8 +110,6 @@ int board_early_init_f(void)
 
 int board_init(void)
 {
-	int i;
-
 	/* Address of boot parameters */
 	gd->bd->bi_boot_params = mvebu_sdram_bar(0) + 0x100;
 
@@ -142,10 +124,6 @@ int board_init(void)
 	setbits_le32(MVEBU_GPIO0_BASE + 0x0, BIT(19));
 	mdelay(10);
 
-	/* Init I2C IO expanders */
-	for (i = 0; i < ARRAY_SIZE(io_exp); i++)
-		i2c_write(io_exp[i].chip, io_exp[i].addr, 1, &io_exp[i].val, 1);
-
 	return 0;
 }
 

configs/clearfog_defconfig

@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 CONFIG_ARCH_MVEBU=y
 CONFIG_SYS_TEXT_BASE=0x00800000
+CONFIG_SPL_GPIO_SUPPORT=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_SYS_MALLOC_F_LEN=0x2000
@@ -21,6 +22,7 @@ CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x141
 CONFIG_SPL_I2C_SUPPORT=y
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
@@ -36,6 +38,10 @@ CONFIG_ENV_IS_IN_MMC=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_OF_TRANSLATE=y
 CONFIG_SCSI_AHCI=y
+CONFIG_DM_GPIO=y
+CONFIG_DM_PCA953X=y
+CONFIG_DM_I2C=y
+CONFIG_SYS_I2C_MVTWSI=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_MV=y

include/configs/clearfog.h

@@ -21,13 +21,6 @@
  * Commands configuration
  */
 
-/* I2C */
-#define CONFIG_SYS_I2C
-#define CONFIG_SYS_I2C_MVTWSI
-#define CONFIG_I2C_MVTWSI_BASE0		MVEBU_TWSI_BASE
-#define CONFIG_SYS_I2C_SLAVE		0x0
-#define CONFIG_SYS_I2C_SPEED		100000
-
 /* SPI NOR flash default params, used by sf commands */
 #define CONFIG_SF_DEFAULT_BUS		1