RE: [PATCH RESEND 1/2] soc: imx: Add SCU SoC info driver support

[Anson Huang]

Hi, Daniel

> -----Original Message-----
> From: Daniel Baluta [mailto:daniel.baluta@xxxxxxxxx]
> Sent: Monday, May 13, 2019 10:30 PM
> To: Anson Huang <anson.huang@xxxxxxx>
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> <linux-imx@xxxxxxx>; Daniel Baluta <daniel.baluta@xxxxxxx>
> Subject: Re: [PATCH RESEND 1/2] soc: imx: Add SCU SoC info driver support
> 
> <snip>
> 
> > +
> > +static u32 imx8qxp_soc_revision(void) {
> > +       struct imx_sc_msg_misc_get_soc_id msg;
> > +       struct imx_sc_rpc_msg *hdr = &msg.hdr;
> > +       u32 rev = 0;
> > +       int ret;
> > +
> > +       hdr->ver = IMX_SC_RPC_VERSION;
> > +       hdr->svc = IMX_SC_RPC_SVC_MISC;
> > +       hdr->func = IMX_SC_MISC_FUNC_GET_CONTROL;
> > +       hdr->size = 3;
> > +
> > +       msg.data.send.control = IMX_SC_C_ID;
> > +       msg.data.send.resource = IMX_SC_R_SYSTEM;
> > +
> > +       ret = imx_scu_call_rpc(soc_ipc_handle, &msg, true);
> > +       if (ret) {
> > +               dev_err(&imx_scu_soc_pdev->dev,
> > +                       "get soc info failed, ret %d\n", ret);
> > +               return rev;
> 
> So you return 0 (rev  = 0) here in case of error? This doesn't seem to be right.
> Maybe return ret?

This is intentional, similar with current i.MX8MQ soc info driver, when getting revision
failed, just return 0 as revision info and it will show "unknown" in sysfs.

Thanks,
Anson.