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arm: mvebu: helios4: Enable I2C and IO Expander

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Enable Marvell I2C driver and I2C IO expander. Set default bus to
external I2C bus. Define I2C aliases in device tree so it can be
recognized by the driver.

Signed-off-by: Aditya Prayoga <aditya@kobol.io>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-By: Dennis Gilmore <dgilmore@redhat.com>
Reviewed-By: Dennis Gilmore <dgilmore@redhat.com>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Aditya Prayoga 2018-12-05 00:57:21 +08:00 committed by Stefan Roese
parent a134d680ea
commit c209a65e9e
3 changed files with 12 additions and 32 deletions
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8
arch/arm/dts/armada-388-helios4-u-boot.dtsi Normal file
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@ -0,0 +1,8 @@
// SPDX-License-Identifier: GPL-2.0+
/ {
aliases {
i2c0 = &i2c0;
i2c1 = &i2c1;
};
};

32
board/kobol/helios4/helios4.c
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@ -33,18 +33,6 @@ 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 addr;
u8 val;
};
static struct marvell_io_exp io_exp[] = {
{6, 0xf9},
{2, 0x46}, /* Assert reset signals and enable USB3 current limiter */
{6, 0xb9}
};
static struct serdes_map board_serdes_map[] = {
{SATA0, SERDES_SPEED_6_GBPS, SERDES_DEFAULT_MODE, 0, 0},
{USB3_HOST0, SERDES_SPEED_5_GBPS, SERDES_DEFAULT_MODE, 0, 0},
@ -123,29 +111,9 @@ 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;
/* Init I2C IO expanders */
for (i = 0; i < ARRAY_SIZE(io_exp); i++) {
struct udevice *dev;
int ret;
ret = i2c_get_chip_for_busnum(0, io_exp[i].addr, 1, &dev);
if (ret) {
printf("Cannot find I2C: %d\n", ret);
return 0;
}
ret = dm_i2c_write(dev, io_exp[i].val, &io_exp[i].val, 1);
if (ret) {
printf("Failed to set IO expander via I2C\n");
return -EIO;
}
}
return 0;
}

4
configs/helios4_defconfig
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@ -38,7 +38,11 @@ CONFIG_ENV_IS_IN_MMC=y
CONFIG_NET_RANDOM_ETHADDR=y
CONFIG_SPL_OF_TRANSLATE=y
CONFIG_SCSI_AHCI=y
CONFIG_DM_PCA953X=y
CONFIG_DM_I2C=y
CONFIG_SYS_I2C_MVTWSI=y
CONFIG_I2C_SET_DEFAULT_BUS_NUM=y
CONFIG_I2C_DEFAULT_BUS_NUMBER=0x1
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_SDMA=y
CONFIG_MMC_SDHCI_MV=y