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board: ti: common: Add generic AM6x board detection functions

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Add two new generic functions for AM6x family boards to simplify
board-specific implementations:

- do_board_detect_am6(): Generic board detection function that reads
  the on-board EEPROM. It first attempts to read at the configured
  address, and if that fails, tries the alternate address
  (CONFIG_EEPROM_CHIP_ADDRESS + 1). This provides a common
  implementation that can be used across different AM6x boards.

- setup_serial_am6(): Sets up the serial number environment variable
  from the EEPROM data. The serial number is converted from
  hexadecimal string format to a 16-character hexadecimal
  representation and stored in the "serial#" environment variable.

Both functions are protected by CONFIG_IS_ENABLED(TI_I2C_BOARD_DETECT)
and are designed to be used by AM62x, AM64x, AM65x, and other AM6x
family boards.

Reviewed-by: Mattijs Korpershoek <mkorpershoek@kernel.org>
Signed-off-by: Guillaume La Roque (TI.com) <glaroque@baylibre.com>
This commit is contained in:
Guillaume La Roque (TI.com) 2025-11-03 19:40:02 +01:00 committed by Tom Rini
parent 6a56d10fdc
commit 46684bb036
2 changed files with 65 additions and 0 deletions
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43
board/ti/common/board_detect.c
View File

@ -824,3 +824,46 @@ bool __maybe_unused board_ti_was_eeprom_read(void)
else
return false;
}
#if CONFIG_IS_ENABLED(TI_I2C_BOARD_DETECT)
int do_board_detect_am6(void)
{
int ret;
ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
CONFIG_EEPROM_CHIP_ADDRESS);
if (ret) {
printf("EEPROM not available at 0x%02x, trying to read at 0x%02x\n",
CONFIG_EEPROM_CHIP_ADDRESS,
CONFIG_EEPROM_CHIP_ADDRESS + 1);
ret = ti_i2c_eeprom_am6_get_base(CONFIG_EEPROM_BUS_ADDRESS,
CONFIG_EEPROM_CHIP_ADDRESS +
1);
if (ret)
pr_err("Reading on-board EEPROM at 0x%02x failed %d\n",
CONFIG_EEPROM_CHIP_ADDRESS + 1, ret);
}
return ret;
}
void setup_serial_am6(void)
{
struct ti_am6_eeprom *ep = TI_AM6_EEPROM_DATA;
unsigned long board_serial;
char *endp;
char serial_string[17] = { 0 };
if (env_get("serial#"))
return;
board_serial = simple_strtoul(ep->serial, &endp, 16);
if (*endp != '\0') {
pr_err("Error: Can't set serial# to %s\n", ep->serial);
return;
}
snprintf(serial_string, sizeof(serial_string), "%016lx", board_serial);
env_set("serial#", serial_string);
}
#endif

22
board/ti/common/board_detect.h
View File

@ -313,6 +313,28 @@ int __maybe_unused ti_i2c_eeprom_am6_get(int bus_addr, int dev_addr,
*/
int __maybe_unused ti_i2c_eeprom_am6_get_base(int bus_addr, int dev_addr);
/**
* do_board_detect_am6() - Detect AM6x board and read EEPROM data
*
* This is a generic board detection function for AM6x family boards.
* It attempts to read the on-board EEPROM at the configured address,
* and if that fails, tries the alternate address (CONFIG_EEPROM_CHIP_ADDRESS + 1).
*
* Return: 0 on success or corresponding error on failure.
*/
int do_board_detect_am6(void);
/**
* setup_serial_am6() - Setup serial number environment variable for AM6x boards
*
* This function reads the serial number from the AM6x EEPROM data and
* sets the "serial#" environment variable. The serial number is converted
* from hexadecimal string format to a 16-character hexadecimal representation.
*
* EEPROM should be already read before calling this function.
*/
void setup_serial_am6(void);
#ifdef CONFIG_TI_I2C_BOARD_DETECT
/**
* board_ti_is() - Board detection logic for TI EVMs