diff options
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/imx/soc-imx-scu.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/soc/imx/soc-imx-scu.c b/drivers/soc/imx/soc-imx-scu.c index 676f612f6488..50831ebf126a 100644 --- a/drivers/soc/imx/soc-imx-scu.c +++ b/drivers/soc/imx/soc-imx-scu.c @@ -27,6 +27,40 @@ struct imx_sc_msg_misc_get_soc_id { } data; } __packed; +struct imx_sc_msg_misc_get_soc_uid { + struct imx_sc_rpc_msg hdr; + u32 uid_low; + u32 uid_high; +} __packed; + +static ssize_t soc_uid_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct imx_sc_msg_misc_get_soc_uid msg; + struct imx_sc_rpc_msg *hdr = &msg.hdr; + u64 soc_uid; + int ret; + + hdr->ver = IMX_SC_RPC_VERSION; + hdr->svc = IMX_SC_RPC_SVC_MISC; + hdr->func = IMX_SC_MISC_FUNC_UNIQUE_ID; + hdr->size = 1; + + ret = imx_scu_call_rpc(soc_ipc_handle, &msg, false); + if (ret) { + pr_err("%s: get soc uid failed, ret %d\n", __func__, ret); + return ret; + } + + soc_uid = msg.uid_high; + soc_uid <<= 32; + soc_uid |= msg.uid_low; + + return sprintf(buf, "%016llX\n", soc_uid); +} + +static DEVICE_ATTR_RO(soc_uid); + static int imx_scu_soc_id(void) { struct imx_sc_msg_misc_get_soc_id msg; @@ -102,6 +136,11 @@ static int imx_scu_soc_probe(struct platform_device *pdev) goto free_revision; } + ret = device_create_file(soc_device_to_device(soc_dev), + &dev_attr_soc_uid); + if (ret) + goto free_revision; + return 0; free_revision: |