[PATCH v2 2/4] board: am62x: Add support for reading eeprom data

[Guillaume La Roque]

Le 27/10/2025 à 19:08, Andrew Davis a écrit :
> On 10/24/25 9:17 AM, Guillaume La Roque (TI.com) wrote:
>> I2C EEPROM data contains the board name and its revision.
>> Add support for:
>> - Reading EEPROM data and store a copy at end of SRAM
>> - Updating env variable with relevant board info
>> - Printing board info during boot
>>
>> Use the generic do_board_detect_am6() and setup_serial_am6()
>> functions to avoid code duplication across AM6x family boards.
>>
>> Signed-off-by: Guillaume La Roque (TI.com) <glaroque at baylibre.com>
>> ---
>>   arch/arm/mach-k3/am62x/Kconfig |  3 +++
>>   board/ti/am62x/evm.c           | 54 
>> +++++++++++++++++++++++++++++++++++++++++-
>>   configs/am62x_evm_r5_defconfig |  1 +
>>   3 files changed, 57 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/mach-k3/am62x/Kconfig 
>> b/arch/arm/mach-k3/am62x/Kconfig
>> index 81199ada3a1..f7ad52db7d8 100644
>> --- a/arch/arm/mach-k3/am62x/Kconfig
>> +++ b/arch/arm/mach-k3/am62x/Kconfig
>> @@ -14,6 +14,8 @@ config TARGET_AM625_A53_EVM
>>       select ARM64
>>       select BINMAN
>>       select OF_SYSTEM_SETUP
>> +    imply TI_COMMON_CMD_OPTIONS
>> +    imply TI_I2C_BOARD_DETECT
>>     config TARGET_AM625_R5_EVM
>>       bool "TI K3 based AM625 EVM running on R5"
>> @@ -25,6 +27,7 @@ config TARGET_AM625_R5_EVM
>>       select K3_DDRSS
>>       select BINMAN
>>       imply SYS_K3_SPL_ATF
>> +    imply TI_I2C_BOARD_DETECT
>>     config TARGET_PHYCORE_AM62X_A53
>>       bool "PHYTEC phyCORE-AM62x running on A53"
>> diff --git a/board/ti/am62x/evm.c b/board/ti/am62x/evm.c
>> index c2c7a0216b9..591324ecc15 100644
>> --- a/board/ti/am62x/evm.c
>> +++ b/board/ti/am62x/evm.c
>> @@ -22,8 +22,16 @@
>>   #include <dm/uclass.h>
>>   #include <asm/arch/k3-ddr.h>
>>   +#include "../common/board_detect.h"
>>   #include "../common/fdt_ops.h"
>>   +#define board_is_am62x_skevm()  (board_ti_k3_is("AM62-SKEVM") || \
>> +                 board_ti_k3_is("AM62B-SKEVM"))
>> +#define board_is_am62b_p1_skevm() board_ti_k3_is("AM62B-SKEVM-P1")
>> +#define board_is_am62x_lp_skevm() board_ti_k3_is("AM62-LP-SKEVM")
>> +#define board_is_am62x_sip_skevm() board_ti_k3_is("AM62SIP-SKEVM")
>> +#define board_is_am62x_play() board_ti_k3_is("BEAGLEPLAY-A0-")
>
> BeaglePlay is not a TI AM62x EVM variant, its support is handled
> separately over in board/beagle/beagleplay/, might be good to drop
> this line to avoid any confusion around how the board is supported.
yes sorry i forgot it i will fix in v3
>
> Andrew
>
>> +
>>   DECLARE_GLOBAL_DATA_PTR;
>>     #if CONFIG_IS_ENABLED(SPLASH_SCREEN)
>> @@ -74,9 +82,53 @@ struct efi_capsule_update_info update_info = {
>>       .images = fw_images,
>>   };
>>   -#ifdef CONFIG_BOARD_LATE_INIT
>> +#if CONFIG_IS_ENABLED(TI_I2C_BOARD_DETECT)
>> +int checkboard(void)
>> +{
>> +    struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
>> +
>> +    if (!do_board_detect_am6())
>> +        printf("Board: %s rev %s\n", ep->name, ep->version);
>> +
>> +    return 0;
>> +}
>> +
>> +#if CONFIG_IS_ENABLED(BOARD_LATE_INIT)
>> +static void setup_board_eeprom_env(void)
>> +{
>> +    char *name = "am62x_skevm";
>> +
>> +    if (do_board_detect_am6())
>> +        goto invalid_eeprom;
>> +
>> +    if (board_is_am62x_skevm())
>> +        name = "am62x_skevm";
>> +    else if (board_is_am62b_p1_skevm())
>> +        name = "am62b_p1_skevm";
>> +    else if (board_is_am62x_lp_skevm())
>> +        name = "am62x_lp_skevm";
>> +    else if (board_is_am62x_sip_skevm())
>> +        name = "am62x_sip_skevm";
>> +    else if (board_is_am62x_play())
>> +        name = "am62x_beagleplay";
>> +    else
>> +        printf("Unidentified board claims %s in eeprom header\n",
>> +               board_ti_get_name());
>> +
>> +invalid_eeprom:
>> +    set_board_info_env_am6(name);
>> +}
>> +#endif
>> +#endif
>> +
>> +#if CONFIG_IS_ENABLED(BOARD_LATE_INIT)
>>   int board_late_init(void)
>>   {
>> +    if (IS_ENABLED(CONFIG_TI_I2C_BOARD_DETECT)) {
>> +        setup_board_eeprom_env();
>> +        setup_serial_am6();
>> +    }
>> +
>>       ti_set_fdt_env(NULL, NULL);
>>       return 0;
>>   }
>> diff --git a/configs/am62x_evm_r5_defconfig 
>> b/configs/am62x_evm_r5_defconfig
>> index 18ffc991b25..d42bdf1f074 100644
>> --- a/configs/am62x_evm_r5_defconfig
>> +++ b/configs/am62x_evm_r5_defconfig
>> @@ -85,6 +85,7 @@ CONFIG_SPL_CLK_K3_PLL=y
>>   CONFIG_SPL_CLK_K3=y
>>   CONFIG_TI_SCI_PROTOCOL=y
>>   CONFIG_DA8XX_GPIO=y
>> +CONFIG_DM_I2C=y
>>   CONFIG_DM_MAILBOX=y
>>   CONFIG_K3_SEC_PROXY=y
>>   CONFIG_SPL_MISC=y
>>
>