linux-kernel - Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark UART

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Message-ID: <1460388795.19152.38.camel@nexus-software.ie>
Date:	Mon, 11 Apr 2016 16:33:15 +0100
From:	Bryan O'Donoghue <pure.logic@...us-software.ie>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Vinod Koul <vinod.koul@...el.com>,
	linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	ismo.puustinen@...el.com,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	linux-serial@...r.kernel.org
Subject: Re: [PATCH v1 12/12] serial: 8250_lpss: enable DMA on Intel Quark
 UART

On Thu, 2016-04-07 at 23:37 +0300, Andy Shevchenko wrote:

Preface. I tried this on Galileo and it appears to work. I'll do some
throughput testing to verify but, initially the results are positive :)


> +       lpss->dma_maxburst = 8;

Are these dwords ? If those are bytes then the maxburst value looks
small. In the BSP the max burst is 32 bytes.

---
bod