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From:   Stephen Boyd <sboyd@kernel.org>
Subject: Re: [PATCH v3 1/3] clk: analogbits: add Wide-Range PLL library
To:     Paul Walmsley <paul.walmsley@sifive.com>
Cc:     Paul Walmsley <paul.walmsley@sifive.com>,
        devicetree@vger.kernel.org, linux-clk@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
        Paul Walmsley <paul@pwsan.com>,
        Wesley Terpstra <wesley@sifive.com>,
        Palmer Dabbelt <palmer@sifive.com>,
        Michael Turquette <mturquette@baylibre.com>,
        Megan Wachs <megan@sifive.com>
Message-ID: <155664891171.168659.10903540623861208390@swboyd.mtv.corp.google.com>
User-Agent: alot/0.8
Date:   Tue, 30 Apr 2019 11:28:31 -0700
Sender: linux-kernel-owner@vger.kernel.org
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Quoting Paul Walmsley (2019-04-29 22:57:15)
> On Mon, 29 Apr 2019, Stephen Boyd wrote:
>=20
> > Quoting Paul Walmsley (2019-04-29 12:42:07)
> > > On Fri, 26 Apr 2019, Paul Walmsley wrote:
> > > > On Fri, 26 Apr 2019, Stephen Boyd wrote:
> > > >=20
> > > > > Quoting Paul Walmsley (2019-04-11 01:27:32)
> > > > > > Add common library code for the Analog Bits Wide-Range PLL (WRP=
LL) IP
> > > > > > block, as implemented in TSMC CLN28HPC.
> > > > >=20
> > > > > I haven't deeply reviewed at all, but I already get two problems =
when
> > > > > compile testing these patches. I can fix them up if nothing else =
needs
> > > > > fixing.
> > > > >=20
> > > > > drivers/clk/analogbits/wrpll-cln28hpc.c:165 __wrpll_calc_divq() w=
arn: should 'target_rate << divq' be a 64 bit type?
> > > > > drivers/clk/sifive/fu540-prci.c:214:16: error: return expression =
in void function
> > > >=20
> > > > Hmm, that's odd.  I will definitely take a look and repost.
> > >=20
> > > I'm not able to reproduce these problems.  The configs tried here wer=
e:
> > >=20
> > > - 64-bit RISC-V defconfig w/ PRCI driver enabled (gcc 8.2.0 built wit=
h=20
> > >   crosstool-NG 1.24.0)
> > >=20
> > > - 32-bit ARM defconfig w/ PRCI driver enabled (gcc 8.3.0 built with=20
> > >   crosstool-NG 1.24.0)
> > >=20
> > > - 32-bit i386 defconfig w/ PRCI driver enabled (gcc=20
> > >   5.4.0-6ubuntu1~16.04.11)
> > >=20
> > > Could you post the toolchain and kernel config you're using?
> > >=20
> >=20
> > I'm running sparse and smatch too.
>=20
> OK.  I was able to reproduce the __wrpll_calc_divq() warning.  It's been =

> resolved in the upcoming revision. =20
>=20
> But I don't see the second error with either sparse or smatch.  (This is =

> with sparse at commit 2b96cd804dc7 and smatch at commit f0092daff69d.)
>=20

Weird! The return in void function is pretty obvious though so please
fix it regardless.