From: William Breathitt Gray <william.gray@linaro.org>
To: Biju Das <biju.das.jz@bp.renesas.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>,
Rob Herring <robh+dt@kernel.org>, Lee Jones <lee@kernel.org>,
"linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Chris Paterson <Chris.Paterson2@renesas.com>,
Biju Das <biju.das@bp.renesas.com>,
Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com>,
"linux-renesas-soc@vger.kernel.org"
<linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH v3 4/4] counter: Add RZ/G2L MTU3 counter driver
Date: Wed, 12 Oct 2022 20:24:00 -0400 [thread overview]
Message-ID: <Y0daoGTQJM7mo1/U@fedora> (raw)
In-Reply-To: <OS0PR01MB5922DDC46213E925988C2C9686239@OS0PR01MB5922.jpnprd01.prod.outlook.com>
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On Tue, Oct 11, 2022 at 05:55:50PM +0000, Biju Das wrote:
> > > > > Looks like something different is done when ceiling is set to 0.
> > > > > Would you explain what's happening in this case and why it's
> > > > > different that then else case below; in other words, what's the
> > > > > difference between RZ_MTU3_TCR_CCLR_NONE and
> > > RZ_MTU3_TCR_CCLR_TGRA?
> > > >
> > > > RZ_MTU3_TCR_CCLR_TGRA --> for triggering counter count using Z-
> > Phase
> > > signal.
> > > > RZ_MTU3_TCR_CCLR_NONE --> No clearing.
> > >
> > > Does the Z-Phase signal trigger a reset of the counter count back to
> > > the ceiling value?
> >
> > No, It resets to 0.
>
> It reset to 0 for forward counting
> and resets to U16_MAX or U32_MAX for backword counting
So when counting backwards, will the value reset to the ceiling value
when it passes 0?
William Breathitt Gray
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next prev parent reply other threads:[~2022-10-13 0:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20221006135717.1748560-1-biju.das.jz@bp.renesas.com>
2022-10-06 13:57 ` [PATCH v3 4/4] counter: Add RZ/G2L MTU3 counter driver Biju Das
2022-10-08 1:37 ` William Breathitt Gray
2022-10-08 9:01 ` Biju Das
2022-10-11 13:15 ` William Breathitt Gray
2022-10-11 15:50 ` Biju Das
2022-10-11 17:55 ` Biju Das
2022-10-13 0:24 ` William Breathitt Gray [this message]
2022-10-13 0:19 ` William Breathitt Gray
2022-10-13 5:47 ` Biju Das
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