/*
* read one u32 to indexed fuse
*/
int imx_otp_read_one_u32(u32 index, u32 *pdata)
{
u32 ctrl_reg = 0;
int ret = 0;
log("index: 0x%X", index);
if (index > IMX_OTP_ADDR_MAX) {
printf("ERROR: invalid address.\n");
ret = -1;
goto exit_nop;
}
if (otp_clk_enable()) {
ret = -1;
printf("ERROR: failed to initialize OTP\n");
goto exit_nop;
}
if (otp_read_prep()) {
ret = -1;
printf("ERROR: read preparation failed\n");
goto exit_cleanup;
}
if (fuse_read_addr(index, pdata)) {
ret = -1;
printf("ERROR: read failed\n");
goto exit_cleanup;
}
if (otp_read_post()) {
ret = -1;
printf("ERROR: read post operation failed\n");
goto exit_cleanup;
}
if (*pdata == IMX_OTP_DATA_ERROR_VAL) {
ctrl_reg = readl(IMX_OTP_BASE + HW_OCOTP_CTRL);
if (ctrl_reg & BM_OCOTP_CTRL_ERROR) {
printf("ERROR: read fuse failed\n");
ret = -1;
goto exit_cleanup;
}
}
exit_cleanup:
otp_clk_disable();
exit_nop:
return ret;
}
int imx6_ocotp_read_one_u32(struct ocotp_priv *priv, u32 index, u32 *pdata)
{
int ret;
ret = imx6_ocotp_prepare(priv);
if (ret) {
dev_err(&priv->dev, "failed to prepare read fuse 0x%08x\n",
index);
return ret;
}
ret = fuse_read_addr(priv, index, pdata);
if (ret) {
dev_err(&priv->dev, "failed to read fuse 0x%08x\n", index);
return ret;
}
return 0;
}