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From: Lukasz Majewski <lukma@denx.de>
To: Shawn Guo <shawnguo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
	devicetree@vger.kernel.org, Sascha Hauer <s.hauer@pengutronix.de>,
	linux-kernel@vger.kernel.org, Stefan Agner <stefan@agner.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Robin Murphy <robin.murphy@arm.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2] dts: Disable DMA support on the BK4 vf610 device's fsl_lpuart driver
Date: Fri, 25 Oct 2019 12:00:00 +0200	[thread overview]
Message-ID: <20191025120000.5dbb837d@jawa> (raw)
In-Reply-To: <20191025085515.GH3208@dragon>


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Hi Shawn,

> On Thu, Oct 10, 2019 at 11:08:02AM +0200, Lukasz Majewski wrote:
> > This change disables the DMA support (RX/TX) on the NXP's fsl_lpuart
> > driver - the PIO mode is used instead. This change is necessary for
> > better robustness of BK4's device use cases with many potentially
> > interrupted short serial transfers.
> > 
> > Without it the driver hangs when some distortion happens on UART
> > lines.
> > 
> > Signed-off-by: Lukasz Majewski <lukma@denx.de>
> > Suggested-by: Robin Murphy <robin.murphy@arm.com>  
> 
> Subject prefix should be 'ARM: dts: ...'.  I fixed it up and applied
> the patch.
> 
> Shawn

Thanks :-)


Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de

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WARNING: multiple messages have this Message-ID (diff)
From: Lukasz Majewski <lukma@denx.de>
To: Shawn Guo <shawnguo@kernel.org>
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Mark Rutland <mark.rutland@arm.com>,
	Rob Herring <robh+dt@kernel.org>, Stefan Agner <stefan@agner.ch>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v2] dts: Disable DMA support on the BK4 vf610 device's fsl_lpuart driver
Date: Fri, 25 Oct 2019 12:00:00 +0200	[thread overview]
Message-ID: <20191025120000.5dbb837d@jawa> (raw)
In-Reply-To: <20191025085515.GH3208@dragon>

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Hi Shawn,

> On Thu, Oct 10, 2019 at 11:08:02AM +0200, Lukasz Majewski wrote:
> > This change disables the DMA support (RX/TX) on the NXP's fsl_lpuart
> > driver - the PIO mode is used instead. This change is necessary for
> > better robustness of BK4's device use cases with many potentially
> > interrupted short serial transfers.
> > 
> > Without it the driver hangs when some distortion happens on UART
> > lines.
> > 
> > Signed-off-by: Lukasz Majewski <lukma@denx.de>
> > Suggested-by: Robin Murphy <robin.murphy@arm.com>  
> 
> Subject prefix should be 'ARM: dts: ...'.  I fixed it up and applied
> the patch.
> 
> Shawn

Thanks :-)


Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma@denx.de

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  reply	other threads:[~2019-10-25 10:00 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-10  9:08 [PATCH v2] dts: Disable DMA support on the BK4 vf610 device's fsl_lpuart driver Lukasz Majewski
2019-10-10  9:08 ` Lukasz Majewski
2019-10-25  8:55 ` Shawn Guo
2019-10-25  8:55   ` Shawn Guo
2019-10-25 10:00   ` Lukasz Majewski [this message]
2019-10-25 10:00     ` Lukasz Majewski

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