linux-kernel - RE: [PATCH V4 0/2] timer: add imx tpm timer support

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Message-ID: <AM3PR04MB306586EB2AFAD8F4B28BC4980D40@AM3PR04MB306.eurprd04.prod.outlook.com>
Date:   Wed, 5 Jul 2017 08:48:41 +0000
From:   "A.s. Dong" <aisheng.dong@....com>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jacky Bai <ping.bai@....com>,
        Anson Huang <anson.huang@....com>,
        "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "dongas86@...il.com" <dongas86@...il.com>
Subject: RE: [PATCH V4 0/2] timer: add imx tpm timer support

> -----Original Message-----
> From: Jonathan Cameron [mailto:Jonathan.Cameron@...wei.com]
> Sent: Wednesday, July 05, 2017 4:24 PM
> To: A.s. Dong
> Cc: linux-kernel@...r.kernel.org; Jacky Bai; Anson Huang;
> daniel.lezcano@...aro.org; kernel@...gutronix.de; tglx@...utronix.de;
> shawnguo@...nel.org; linux-arm-kernel@...ts.infradead.org;
> dongas86@...il.com
> Subject: Re: [PATCH V4 0/2] timer: add imx tpm timer support
> 
> On Wed, 5 Jul 2017 10:35:10 +0800
> Dong Aisheng <aisheng.dong@....com> wrote:
> 
> > The Timer/PWM Module (TPM) supports input capture, output compare, and
> > the generation of PWM signals to control electric motor and power
> > management applications. The counter, compare and capture registers
> > are clocked by an asynchronous clock that can remain enabled in low
> > power modes. TPM can support global counter bus where one TPM drives
> > the counter bus for the others, provided bit width is the same.
> >
> > This patch only adds the timer support. PWM would be added later.
> Hi Dong,
> 
> Not relevant to this patch - just an observation!
> 
> Just came across this thread and took a look at the hardware. I see some
> of the timers (particularly the flextimers) support quadrature encoder
> modes.  Just thought I'd point you at some on going discussions on the
> IIO list (linux-iio@...r.kernel.org) trying to improve the interface for
> such devices.  Might be of interest (or not depending on whether support
> for that functionality is of interest!)
> 
> http://marc.info/?l=linux-iio&m=149904379731556&w=2
> 

Hi Jonathan,

Thanks for the info.
I will find time to check it later.

Regards
Dong Aisheng