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| author | Hiago De Franco <hiago.franco@toradex.com> | 2023-10-02 08:57:49 -0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2023-10-16 08:46:01 +0200 |
| commit | 0c39564d02817a3a5b5b2519e73afc0969966206 (patch) | |
| tree | 47ce58a9f991a82086fe0737472d586a1a0141aa /board/toradex | |
| parent | 35fe2ae244b13a06297f08cdc5785bf913708079 (diff) | |
| download | u-boot-0c39564d02817a3a5b5b2519e73afc0969966206.tar.gz u-boot-0c39564d02817a3a5b5b2519e73afc0969966206.tar.bz2 u-boot-0c39564d02817a3a5b5b2519e73afc0969966206.zip | |
toradex: colibri_imx7: Enable nand/emmc detection and set boot variant
Add detection of eMMC vs NAND devices on the Colibri iMX7
board. A GPIO is configured to detect the presence of an on-board resistor
that is configured differently based on the flash memory used. Depending on
the detection result, the 'variant' environment variable is set to '-emmc'
or cleared, indicating the type of storage device.
This enhancement improves variant detection during system initialization
through USB recovery mode, where U-Boot is loaded directly to RAM. This
allows variant detection for an accurate device tree selection.
Signed-off-by: Hiago De Franco <hiago.franco@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Diffstat (limited to 'board/toradex')
| -rw-r--r-- | board/toradex/colibri_imx7/colibri_imx7.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/board/toradex/colibri_imx7/colibri_imx7.c b/board/toradex/colibri_imx7/colibri_imx7.c index 119e67b47f..f0356af008 100644 --- a/board/toradex/colibri_imx7/colibri_imx7.c +++ b/board/toradex/colibri_imx7/colibri_imx7.c @@ -53,6 +53,11 @@ DECLARE_GLOBAL_DATA_PTR; #define USB_CDET_GPIO IMX_GPIO_NR(7, 14) +#define FLASH_DETECTION_CTRL (PAD_CTL_HYS | PAD_CTL_PUE) +#define FLASH_DET_GPIO IMX_GPIO_NR(6, 11) + +static bool is_emmc; + int dram_init(void) { gd->ram_size = get_ram_size((void *)PHYS_SDRAM, imx_ddr_size()); @@ -60,6 +65,10 @@ int dram_init(void) return 0; } +static iomux_v3_cfg_t const flash_detection_pads[] = { + MX7D_PAD_SD3_RESET_B__GPIO6_IO11 | MUX_PAD_CTRL(FLASH_DETECTION_CTRL), +}; + static iomux_v3_cfg_t const uart1_pads[] = { MX7D_PAD_UART1_RX_DATA__UART1_DTE_TX | MUX_PAD_CTRL(UART_PAD_CTRL), MX7D_PAD_UART1_TX_DATA__UART1_DTE_RX | MUX_PAD_CTRL(UART_PAD_CTRL), @@ -183,6 +192,16 @@ int board_init(void) /* address of boot parameters */ gd->bd->bi_boot_params = PHYS_SDRAM + 0x100; + /* + * Enable GPIO on NAND_WE_B/eMMC_RST with 100k pull-down. eMMC_RST + * is pulled high with 4.7k for eMMC devices. This allows to reliably + * detect eMMC/NAND flash + */ + imx_iomux_v3_setup_multiple_pads(flash_detection_pads, ARRAY_SIZE(flash_detection_pads)); + gpio_request(FLASH_DET_GPIO, "flash-detection-gpio"); + is_emmc = gpio_get_value(FLASH_DET_GPIO); + gpio_free(FLASH_DET_GPIO); + #ifdef CONFIG_FEC_MXC setup_fec(); #endif @@ -348,6 +367,11 @@ int board_late_init(void) env_set("bootcmd", "sdp 0"); } #endif + if (is_emmc) + env_set("variant", "-emmc"); + else + env_set("variant", ""); + return 0; } #endif /* CONFIG_BOARD_LATE_INIT */ |