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Date: Fri, 28 Feb 2014 11:59:25 +0100 From: Lothar Waßmann <LW@...O-electronics.de> To: Marek Vasut <marex@...x.de> Cc: Yao Yuan <yao.yuan@...escale.com>, "mark.rutland@....com" <mark.rutland@....com>, "wsa@...-dreams.de" <wsa@...-dreams.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>, "shawn.guo@...aro.org" <shawn.guo@...aro.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH 1/3] i2c: add DMA support for freescale i2c driver Hi, Marek Vasut wrote: > On Friday, February 28, 2014 at 06:19:18 AM, Yao Yuan wrote: > > [...] > > Yes, here have two dma channels, one for RX and the other one for TX. > > When we request the channel we should determine it for TX or RX. > > Sorry, I don't quite understand this. If you have two DMA channels, can you not > use them both to do full-duplex SPI transfer ? > SPI != I2C Lothar Waßmann -- ___________________________________________________________ Ka-Ro electronics GmbH | Pascalstraße 22 | D - 52076 Aachen Phone: +49 2408 1402-0 | Fax: +49 2408 1402-10 Geschäftsführer: Matthias Kaussen Handelsregistereintrag: Amtsgericht Aachen, HRB 4996 www.karo-electronics.de | info@...o-electronics.de ___________________________________________________________ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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