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| author | Sekhar Nori <nsekhar@ti.com> | 2013-12-10 15:02:15 +0530 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-12-18 21:14:00 -0500 |
| commit | 9f1a8cd33fec83c5e04c8d1103fb3ee2857ff2f0 (patch) | |
| tree | b3f7cdaf89467a5aa08fadad5a81189b2287346a /board/ti/am43xx/board.c | |
| parent | 1564dba7d919e27d9e9c43b3277dfc3da14701d3 (diff) | |
| download | u-boot-imx-9f1a8cd33fec83c5e04c8d1103fb3ee2857ff2f0.zip u-boot-imx-9f1a8cd33fec83c5e04c8d1103fb3ee2857ff2f0.tar.gz u-boot-imx-9f1a8cd33fec83c5e04c8d1103fb3ee2857ff2f0.tar.bz2 | |
ARM: AM43XX: board: add support for reading onboard EEPROM
Add support for reading onboard EEPROM to enable
board detection.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Diffstat (limited to 'board/ti/am43xx/board.c')
| -rw-r--r-- | board/ti/am43xx/board.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/board/ti/am43xx/board.c b/board/ti/am43xx/board.c index dcd8cbb..4fc1a40 100644 --- a/board/ti/am43xx/board.c +++ b/board/ti/am43xx/board.c @@ -9,6 +9,8 @@ */ #include <common.h> +#include <i2c.h> +#include <asm/errno.h> #include <spl.h> #include <asm/arch/clock.h> #include <asm/arch/sys_proto.h> @@ -17,6 +19,50 @@ DECLARE_GLOBAL_DATA_PTR; +/* + * Read header information from EEPROM into global structure. + */ +static int read_eeprom(struct am43xx_board_id *header) +{ + /* Check if baseboard eeprom is available */ + if (i2c_probe(CONFIG_SYS_I2C_EEPROM_ADDR)) { + printf("Could not probe the EEPROM at 0x%x\n", + CONFIG_SYS_I2C_EEPROM_ADDR); + return -ENODEV; + } + + /* read the eeprom using i2c */ + if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 2, (uchar *)header, + sizeof(struct am43xx_board_id))) { + printf("Could not read the EEPROM\n"); + return -EIO; + } + + if (header->magic != 0xEE3355AA) { + /* + * read the eeprom using i2c again, + * but use only a 1 byte address + */ + if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, 1, (uchar *)header, + sizeof(struct am43xx_board_id))) { + printf("Could not read the EEPROM at 0x%x\n", + CONFIG_SYS_I2C_EEPROM_ADDR); + return -EIO; + } + + if (header->magic != 0xEE3355AA) { + printf("Incorrect magic number (0x%x) in EEPROM\n", + header->magic); + return -EINVAL; + } + } + + strncpy(am43xx_board_name, (char *)header->name, sizeof(header->name)); + am43xx_board_name[sizeof(header->name)] = 0; + + return 0; +} + #ifdef CONFIG_SPL_BUILD const struct dpll_params dpll_ddr = { |