From: Thierry Reding <thierry.reding@gmail.com>
To: sean.wang@mediatek.com
Cc: matthias.bgg@gmail.com, linux-pwm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: Re: [PATCH v1] pwm: mediatek: improve precision in rate calculation
Date: Wed, 28 Mar 2018 00:33:15 +0200 [thread overview]
Message-ID: <20180327223314.GH28163@mithrandir> (raw)
In-Reply-To: <72b74a30ced1c7e7549dcbb56d6123fc27fac405.1519980119.git.sean.wang@mediatek.com>
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On Fri, Mar 02, 2018 at 04:49:14PM +0800, sean.wang@mediatek.com wrote:
> From: Sean Wang <sean.wang@mediatek.com>
>
> Add a way that turning resolution from in nanosecond into in picosecond
> to improve noticeably almost 4.5% precision.
>
> It's necessary to hold the new resolution with type u64 and thus related
> operations on u64 are applied instead in those rate calculations.
>
> And the patch has a dependency on [1].
>
> [1] http://lists.infradead.org/pipermail/linux-mediatek/2018-March/012225.html
>
> Cc: stable@vger.kernel.org
> Fixes: caf065f8fd58 ("pwm: Add MediaTek PWM support")
> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> ---
> drivers/pwm/pwm-mediatek.c | 17 ++++++++++++-----
> 1 file changed, 12 insertions(+), 5 deletions(-)
Applied, thanks.
Thierry
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From: thierry.reding@gmail.com (Thierry Reding)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v1] pwm: mediatek: improve precision in rate calculation
Date: Wed, 28 Mar 2018 00:33:15 +0200 [thread overview]
Message-ID: <20180327223314.GH28163@mithrandir> (raw)
In-Reply-To: <72b74a30ced1c7e7549dcbb56d6123fc27fac405.1519980119.git.sean.wang@mediatek.com>
On Fri, Mar 02, 2018 at 04:49:14PM +0800, sean.wang at mediatek.com wrote:
> From: Sean Wang <sean.wang@mediatek.com>
>
> Add a way that turning resolution from in nanosecond into in picosecond
> to improve noticeably almost 4.5% precision.
>
> It's necessary to hold the new resolution with type u64 and thus related
> operations on u64 are applied instead in those rate calculations.
>
> And the patch has a dependency on [1].
>
> [1] http://lists.infradead.org/pipermail/linux-mediatek/2018-March/012225.html
>
> Cc: stable at vger.kernel.org
> Fixes: caf065f8fd58 ("pwm: Add MediaTek PWM support")
> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> ---
> drivers/pwm/pwm-mediatek.c | 17 ++++++++++++-----
> 1 file changed, 12 insertions(+), 5 deletions(-)
Applied, thanks.
Thierry
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next prev parent reply other threads:[~2018-03-27 22:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-02 8:49 [PATCH v1] pwm: mediatek: improve precision in rate calculation sean.wang
2018-03-02 8:49 ` sean.wang
2018-03-02 8:49 ` sean.wang at mediatek.com
2018-03-27 22:33 ` Thierry Reding [this message]
2018-03-27 22:33 ` Thierry Reding
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