From: Shawn Guo <shawnguo@kernel.org>
To: Lukasz Majewski <lukma@denx.de>
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 16:55:17 +0800 [thread overview]
Message-ID: <20191025085515.GH3208@dragon> (raw)
In-Reply-To: <20191010090802.16383-1-lukma@denx.de>
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
next prev parent reply other threads:[~2019-10-25 8:55 UTC|newest]
Thread overview: 3+ 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
2019-10-25 8:55 ` Shawn Guo [this message]
2019-10-25 10:00 ` Lukasz Majewski
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