linux-kernel - Re: [PATCH v2 1/3] dt/binding: ti-tsc-adc: deprecate ti,charge-delay and add binding doc for ti,charge-delay-ns

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Date:   Mon, 14 Nov 2016 19:54:42 -0600
From:   Rob Herring <robh@...nel.org>
To:     Mugunthan V N <mugunthanvnm@...com>
Cc:     linux-input@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Lee Jones <lee.jones@...aro.org>, Sekhar Nori <nsekhar@...com>,
        Vignesh R <vigneshr@...com>, devicetree@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] dt/binding: ti-tsc-adc: deprecate ti,charge-delay
 and add binding doc for ti,charge-delay-ns

On Thu, Nov 10, 2016 at 10:05:13PM +0530, Mugunthan V N wrote:
> ti,charge-delay represents the duration that ADC should wait
> before sampling the ADC line to detect the touch location and pen
> up/downs. Currently the ADC clock is set at 3MHz. The device-tree
> entry for ti,charge-delay is based on assumption of ADC clock at
> 3MHz, but it can be operated up to 24MHz clock. Representing the
> charge delay of touchscreen in terms of ADC clocks is incorrect.
> So change this representation to ti,charge-delay-ns, which driver
> can convert it to number clock cycles based on ref clock
> frequency.
> 
> Signed-off-by: Mugunthan V N <mugunthanvnm@...com>
> ---
>  .../bindings/input/touchscreen/ti-tsc-adc.txt      | 32 ++++++++++++++--------
>  1 file changed, 21 insertions(+), 11 deletions(-)

Acked-by: Rob Herring <robh@...nel.org>