From: Jim Quinlan <james.quinlan@broadcom.com>
To: Randy Dunlap <rdunlap@infradead.org>
Cc: "maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE"
<bcm-kernel-feedback-list@broadcom.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Jassi Brar <jassisinghbrar@gmail.com>,
open list <linux-kernel@vger.kernel.org>,
"moderated list:BROADCOM BCM7XXX ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v3 2/2] mailbox: Add Broadcom STB mailbox driver
Date: Sat, 19 Sep 2020 17:04:57 -0400 [thread overview]
Message-ID: <CA+-6iNyKy+XdMRBJ9HD3u0DVvpfzcbmjXyR0j6oCY=36DVEaog@mail.gmail.com> (raw)
In-Reply-To: <1cd9ed99-3392-f602-f351-b78edcfd1fc4@infradead.org>
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On Sat, Sep 19, 2020 at 3:32 PM Randy Dunlap <rdunlap@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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next prev parent reply other threads:[~2020-09-19 21:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-19 19:22 [PATCH v3 0/2] mailbox: Add Broadcom STB mailbox driver Jim Quinlan
2020-09-19 19:22 ` [PATCH v3 1/2] dt-bindings: Add bindings for BrcmSTB SCMI " Jim Quinlan
2020-09-19 19:22 ` [PATCH v3 2/2] mailbox: Add Broadcom STB " Jim Quinlan
2020-09-19 19:31 ` Randy Dunlap
2020-09-19 21:04 ` Jim Quinlan [this message]
2020-10-09 16:38 ` Sudeep Holla
2020-10-09 17:03 ` Florian Fainelli
2020-10-21 21:38 ` Jim Quinlan
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