Re: [PATCH] soc: imx: check ls1021a

quoted

If you cannot do that here (e.g. because you need the soc_device to be
present very early), then you have to manually check for some DT node and
property to determine whether you run on an i.MX machine and do the silent
'return 0' if not.
This is roughly what you did when you checked for one specific non-i.MX
machine, but since you cannot provide an exhaustive list of all non-i.MX
machines (a denylist) you have to provide some for of allowlist.

Is the following diff ok for you?
Actually all i.MX SoCs will set __mxc_cpu_type. If it is not a valid
one, just return.

diff --git a/drivers/soc/imx/soc-imx.c b/drivers/soc/imx/soc-imx.c
index 01bfea1cb64a..e55225a85592 100644
--- a/drivers/soc/imx/soc-imx.c
+++ b/drivers/soc/imx/soc-imx.c

@@ -33,9 +33,6 @@ static int __init imx_soc_device_init(void)
        u32 val;
        int ret;

-       if (of_machine_is_compatible("fsl,ls1021a"))
-               return 0;
-
        soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
        if (!soc_dev_attr)
                return -ENOMEM;

@@ -131,6 +128,8 @@ static int __init imx_soc_device_init(void)
                break;
        default:
                soc_id = "Unknown";
+               ret = 0;
+               goto free_soc;
        }
        soc_dev_attr->soc_id = soc_id;