diff options
Diffstat (limited to 'arch/arm/boards/protonic-imx8m/board.c')
-rw-r--r-- | arch/arm/boards/protonic-imx8m/board.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/arm/boards/protonic-imx8m/board.c b/arch/arm/boards/protonic-imx8m/board.c new file mode 100644 index 0000000000..d4bacbc6f0 --- /dev/null +++ b/arch/arm/boards/protonic-imx8m/board.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0-only +// SPDX-FileCopyrightText: 2020 David Jander, Protonic Holland + +#include <bootsource.h> +#include <common.h> +#include <envfs.h> +#include <environment.h> +#include <i2c/i2c.h> +#include <init.h> +#include <mach/imx/bbu.h> + +static int prt_prt8mm_init_power(void) +{ + struct i2c_adapter *adapter = NULL; + struct i2c_client client; + int ret; + char buf[2]; + + client.addr = 0x60; + adapter = i2c_get_adapter(1); + if (!adapter) { + printf("i2c bus not found\n"); + return -ENODEV; + } + client.adapter = adapter; + + buf[0] = 0xe3; + ret = i2c_write_reg(&client, 0x00, buf, 1); // VSEL0 = 0.95V, force PWM + if (ret < 0) { + printf("i2c write error\n"); + return -ENODEV; + } + buf[0] = 0xe0; + ret = i2c_write_reg(&client, 0x01, buf, 1); // VSEL1 = 0.92V, force PWM + if (ret < 0) { + printf("i2c write error\n"); + return -ENODEV; + } + return 0; +} + +static int prt_prt8mm_probe(struct device *dev) +{ + int emmc_bbu_flag = 0; + int sd_bbu_flag = 0; + + prt_prt8mm_init_power(); + + barebox_set_hostname("prt8mm"); + + if (bootsource_get() == BOOTSOURCE_MMC) { + if (bootsource_get_instance() == 2) { + of_device_enable_path("/chosen/environment-emmc"); + emmc_bbu_flag = BBU_HANDLER_FLAG_DEFAULT; + } else { + of_device_enable_path("/chosen/environment-sd"); + sd_bbu_flag = BBU_HANDLER_FLAG_DEFAULT; + } + } else { + of_device_enable_path("/chosen/environment-emmc"); + emmc_bbu_flag = BBU_HANDLER_FLAG_DEFAULT; + } + + imx8m_bbu_internal_mmc_register_handler("SD", "/dev/mmc1.barebox", + sd_bbu_flag); + imx8m_bbu_internal_mmcboot_register_handler("eMMC", "/dev/mmc2", + emmc_bbu_flag); + + defaultenv_append_directory(defaultenv_prt8m); + + return 0; +} + +static const struct of_device_id prt_imx8mm_of_match[] = { + { .compatible = "prt,prt8mm", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, prt_imx8mm_of_match); + +static struct driver prt_prt8mm_board_driver = { + .name = "board-protonic-imx8mm", + .probe = prt_prt8mm_probe, + .of_compatible = DRV_OF_COMPAT(prt_imx8mm_of_match), +}; +device_platform_driver(prt_prt8mm_board_driver); |