Hi Scott,
Please see my replay inline.
> -----Original Message-----
> From: linux-arm-kernel <linux-arm-kernel-boun...@lists.infradead.org>
> On Behalf Of Scott Wood
> Sent: 2018年8月31日 1:43
> To: Vabhav Sharma <vabhav.sha...@nxp.com>;
> linux-ker...@vger.kernel.org; devicet...@vger.kernel.org;
> robh...@kernel.org; mark.rutl...@arm.com;
> linuxppc-dev@lists.ozlabs.org; linux-arm-ker...@lists.infradead.org;
> mturque...@baylibre.com; sb...@kernel.org; r...@rjwysocki.net;
> viresh.ku...@linaro.org; linux-...@vger.kernel.org;
> linux...@vger.kernel.org; linux-kernel-ow...@vger.kernel.org;
> catalin.mari...@arm.com; will.dea...@arm.com;
> gre...@linuxfoundation.org; a...@arndb.de;
> kstew...@linuxfoundation.org; yamada.masah...@socionext.com
> Cc: Yogesh Narayan Gaur <yogeshnarayan.g...@nxp.com>; Andy Tang
> <andy.t...@nxp.com>; li...@armlinux.org.uk; Varun Sethi
> <v.se...@nxp.com>; Udit Kumar <udit.ku...@nxp.com>
> Subject: Re: [PATCH 3/5] drivers: clk-qoriq: Add clockgen support for
> lx2160a
>
> On Thu, 2018-08-30 at 12:39 -0500, Scott Wood wrote:
> > On Thu, 2018-08-30 at 07:36 +0000, Vabhav Sharma wrote:
> > > > -----Original Message-----
> > > > From: linux-kernel-ow...@vger.kernel.org <linux-kernel-
> > > > ow...@vger.kernel.org> On Behalf Of Scott Wood
> > > > Sent: Wednesday, August 29, 2018 5:49 AM
> > > > To: Vabhav Sharma <vabhav.sha...@nxp.com>; linux-
> > > > ker...@vger.kernel.org; devicet...@vger.kernel.org;
> > > > robh...@kernel.org; mark.rutl...@arm.com;
> > > > linuxppc-dev@lists.ozlabs.org; linux-arm-
> > > > ker...@lists.infradead.org; mturque...@baylibre.com;
> > > > sb...@kernel.org; r...@rjwysocki.net; viresh.ku...@linaro.org;
> > > > linux-...@vger.kernel.org; linux...@vger.kernel.org;
> > > > linux-kernel-ow...@vger.kernel.org;
> > > > catalin.mari...@arm.com; will.dea...@arm.com;
> > > > gre...@linuxfoundation.org; a...@arndb.de;
> > > > kstew...@linuxfoundation.org; yamada.masah...@socionext.com
> > > > Cc: Yogesh Narayan Gaur <yogeshnarayan.g...@nxp.com>; Andy
> Tang
> > > > <andy.t...@nxp.com>; Udit Kumar <udit.ku...@nxp.com>;
> > > > li...@armlinux.org.uk; Varun Sethi <v.se...@nxp.com>
> > > > Subject: Re: [PATCH 3/5] drivers: clk-qoriq: Add clockgen support
> > > > for lx2160a
> > > >
> > > > On Mon, 2018-08-20 at 12:17 +0530, Vabhav Sharma wrote:
> > > > > From: Yogesh Gaur <yogeshnarayan.g...@nxp.com>
> > > > >
> > > > > Add clockgen support for lx2160a.
> > > > > Added entry for compat 'fsl,lx2160a-clockgen'.
> > > > > As LX2160A is 16 core, so modified value for NUM_CMUX
> > > > >
> > > > > Signed-off-by: Tang Yuantian <andy.t...@nxp.com>
> > > > > Signed-off-by: Yogesh Gaur <yogeshnarayan.g...@nxp.com>
> > > > > Signed-off-by: Vabhav Sharma <vabhav.sha...@nxp.com>
> > > > > ---
> > > > > drivers/clk/clk-qoriq.c | 14 +++++++++++++-
> > > > > drivers/cpufreq/qoriq-cpufreq.c | 1 +
> > > > > 2 files changed, 14 insertions(+), 1 deletion(-)
> > > > >
> > > > > diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
> > > > > index
> > > > > 3a1812f..fc6e308 100644
> > > > > --- a/drivers/clk/clk-qoriq.c
> > > > > +++ b/drivers/clk/clk-qoriq.c
> > > > > @@ -60,7 +60,7 @@ struct clockgen_muxinfo { };
> > > > >
> > > > > #define NUM_HWACCEL 5
> > > > > -#define NUM_CMUX 8
> > > > > +#define NUM_CMUX 16
> > > > >
> > > > > struct clockgen;
> > > > >
> > > > > @@ -570,6 +570,17 @@ static const struct clockgen_chipinfo
> > > > > chipinfo[] = {
> > > > > .flags = CG_VER3 | CG_LITTLE_ENDIAN,
> > > > > },
> > > > > {
> > > > > + .compat = "fsl,lx2160a-clockgen",
> > > > > + .cmux_groups = {
> > > > > + &clockgen2_cmux_cga12, &clockgen2_cmux_cgb
> > > > > + },
> > > > > + .cmux_to_group = {
> > > > > + 0, 0, 0, 0, 1, 1, 1, 1, -1
> > > > > + },
> > > > > + .pll_mask = 0x37,
> > > > > + .flags = CG_VER3 | CG_LITTLE_ENDIAN,
> > > > > + },
> > > >
> > > > Why are you increasing NUM_CMUX beyond 8 for a chip that only
> has
> > > > 8 entries in cmux_to_group?
> > >
> > > Configuration is 16 cores,8 cluster with 2 cores in each cluster
> >
> > So? This is about cmuxes, not cores. You're increasing the array
> > without ever using the new size.
>
> Oh, and you also broke p4080 which has 8 cmuxes but no -1 terminator,
> because the array was of length 8. Probably the array should be changed
> to NUM_CMUX+1 so every array can be -1 terminated.
>
[Andy] How about we add -1 terminator to p4080 and increase NUM_CMUX to 16?
We don't want to increase NUM_CMUX each time new soc with more cmuxes added.
BR,
Andy Tang
> -Scott
>
>
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