On Sat, Sep 19, 2020 at 3:32 PM Randy Dunlap <rdun...@infradead.org> wrote: > > Hi Jim, > > On 9/19/20 12:22 PM, Jim Quinlan wrote: > > --- > > drivers/mailbox/Kconfig | 12 +++ > > drivers/mailbox/Makefile | 2 + > > drivers/mailbox/brcmstb-mailbox.c | 173 ++++++++++++++++++++++++++++++ > > 3 files changed, 187 insertions(+) > > create mode 100644 drivers/mailbox/brcmstb-mailbox.c > > > > diff --git a/drivers/mailbox/Kconfig b/drivers/mailbox/Kconfig > > index 05b1009e2820..96faf1139cb9 100644 > > --- a/drivers/mailbox/Kconfig > > +++ b/drivers/mailbox/Kconfig > > @@ -254,4 +254,16 @@ config QCOM_IPCC > > acts as an interrupt controller for receiving interrupts from > > clients. > > Say Y here if you want to build this driver. > > > > +config BRCMSTB_MBOX > > + tristate "Broadcom STB Mailbox" > > + depends on ARM64 || ARM > > + depends on ARM_SCMI_PROTOCOL && ARCH_BRCMSTB > > + default ARM_SCMI_PROTOCOL && ARCH_BRCMSTB > > + help > > "help" is still indented with spaces instead of one tab. > You probably should wait a bit to see if there are other comments on this > patch > before doing a v4. Hi Randy,
Will fix, then wait...
>
> > + Mailbox implementation of the Broadcom STB for the sole purposes
> > + of SCMI communication. This is used by the SCMI drivers to
> > + communicate with FW that runs in EL3. This mailbox only implements
> > + the agent-to-platform channgel of SCMI but may be augmented in
> > + the future to add the platform-to-agent channel.
> > +
> > endif
> > diff --git a/drivers/mailbox/brcmstb-mailbox.c
> > b/drivers/mailbox/brcmstb-mailbox.c
> > new file mode 100644
> > index 000000000000..27d87938b08c
> > --- /dev/null
> > +++ b/drivers/mailbox/brcmstb-mailbox.c
> > @@ -0,0 +1,173 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/* Copyright (c) 2017, Broadcom */
>
> 2017 is a little surprising.
Will fix.
>
>
> > +#if defined(CONFIG_ARM64) || defined(CONFIG_ARM)
> > +static int announce_msg(unsigned int mbox_num, unsigned int ch)
> > +{
> > + struct arm_smccc_res res;
> > +
> > + if (ch >= NUM_CHAN)
> > + return -EIO;
> > + arm_smccc_smc(BRCM_FID(ch), mbox_num, 0, 0, 0, 0, 0, 0, &res);
> > + if (res.a0)
> > + return -EIO;
> > + return 0;
> > +}
> > +#else
> > +#error Func announce_msg() not defined for the current ARCH
> > +#endif
>
> This is handled by the Kconfig depends on clause.
> Why is it repeated here?
Will fix.
Thanks,
Jim
>
>
>
> thanks.
> --
> ~Randy
>
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