linux-kernel - Re: [PATCH v2] firmware: imx: Add support to start/stop a CPU

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Date:   Wed, 30 Jan 2019 21:14:48 +0800
From:   Dong Aisheng <dongas86@...il.com>
To:     Daniel Baluta <daniel.baluta@....com>
Cc:     dl-linux-imx <linux-imx@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "daniel.baluta@...il.com" <daniel.baluta@...il.com>,
        "festevam@...il.com" <festevam@...il.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "S.j. Wang" <shengjiu.wang@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>
Subject: Re: [PATCH v2] firmware: imx: Add support to start/stop a CPU

On Wed, Jan 30, 2019 at 9:12 PM Daniel Baluta <daniel.baluta@....com> wrote:
>
> Thanks Aisheng for the comments!
>
> <snip>
>
> +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
> > > +                       bool enable, u64 address)
> > > +{
> > > +       struct imx_sc_msg_req_cpu_start msg;
> > > +       struct imx_sc_rpc_msg *hdr = &msg.hdr;
> > > +
> > > +       hdr->ver = IMX_SC_RPC_VERSION;
> > > +       hdr->svc = (uint8_t)IMX_SC_RPC_SVC_PM;
> > > +       hdr->func = (uint8_t)IMX_SC_PM_FUNC_CPU_START;
> >
> > pls drop the unneccesary unit8_t
>
> Ok, I can do that. I had borrowed it from the already existing
> functions imx_sc_misc_get_control / imx_sc_misc_set_control
>

Yes, i know, we need remove them later to avoid confusing.

Regards
Dong Aisheng

> >
> > > +       hdr->size = 4;
> > > +
> > > +       msg.address_hi = address >> 32;
> > > +       msg.address_lo = address;
> > > +       msg.resource = resource;
> > > +       msg.enable = enable;
> > > +
> > > +       return imx_scu_call_rpc(ipc, &msg, false);
> >
> > s/false/true
>
> Nice catch!
>
> Inded, the old API had a different semantic for this parameter.
> >
> > > +}
> > > +EXPORT_SYMBOL(imx_sc_pm_cpu_start);
> > > diff --git a/include/linux/firmware/imx/svc/misc.h
> > > b/include/linux/firmware/imx/svc/misc.h
> > > index e21c49aba92f..c03bf2a23add 100644
> > > --- a/include/linux/firmware/imx/svc/misc.h
> > > +++ b/include/linux/firmware/imx/svc/misc.h
> > > @@ -52,4 +52,7 @@ int imx_sc_misc_set_control(struct imx_sc_ipc
> > > *ipc, u32 resource,
> > >  int imx_sc_misc_get_control(struct imx_sc_ipc *ipc, u32 resource,
> > >                             u8 ctrl, u32 *val);
> > >
> > > +int imx_sc_pm_cpu_start(struct imx_sc_ipc *ipc, u32 resource,
> > > +                       bool enable, u64 address);
> >
> > Nitpick: phy_addr
>
> Ok, will fix.
>
>