diff options
Diffstat (limited to 'drivers/crypto/atmel-i2c.c')
| -rw-r--r-- | drivers/crypto/atmel-i2c.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/crypto/atmel-i2c.c b/drivers/crypto/atmel-i2c.c index a0d0d4f2ab25..a895e4289efa 100644 --- a/drivers/crypto/atmel-i2c.c +++ b/drivers/crypto/atmel-i2c.c @@ -70,6 +70,30 @@ void atmel_i2c_init_read_config_cmd(struct atmel_i2c_cmd *cmd) } EXPORT_SYMBOL(atmel_i2c_init_read_config_cmd); +int atmel_i2c_init_read_otp_cmd(struct atmel_i2c_cmd *cmd, u16 addr) +{ + if (addr < 0 || addr > OTP_ZONE_SIZE) + return -1; + + cmd->word_addr = COMMAND; + cmd->opcode = OPCODE_READ; + /* + * Read the word from OTP zone that may contain e.g. serial + * numbers or similar if persistently pre-initialized and locked + */ + cmd->param1 = OTP_ZONE; + cmd->param2 = cpu_to_le16(addr); + cmd->count = READ_COUNT; + + atmel_i2c_checksum(cmd); + + cmd->msecs = MAX_EXEC_TIME_READ; + cmd->rxsize = READ_RSP_SIZE; + + return 0; +} +EXPORT_SYMBOL(atmel_i2c_init_read_otp_cmd); + void atmel_i2c_init_random_cmd(struct atmel_i2c_cmd *cmd) { cmd->word_addr = COMMAND; |