From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jakub Kicinski Subject: spi-imx: real time operation Date: Wed, 15 Apr 2015 17:09:36 +0200 Message-ID: <20150415170936.3e506e6c@north> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Markus.Niebel-HVi9AzVXQk5Wk0Htik3J/w@public.gmane.org Return-path: Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Hi Markus! I've seen your patch from July which added rt parameter to spi-imx [1]. If I understand the code correctly spi-imx is using bitbang, therefore it uses old SPI API, therefore the message pump does not apply to it, therefore setting master->rt has no effect. Is my understanding correct? If so before I convert spi-imx not to use bitbang I would like to ask you if you have not already done it? ;) Without SPI threads running with RT prio I can't even reliably use an sc16is7xx UART at 115200... [1] http://www.spinics.net/lists/arm-kernel/msg348713.html Thanks -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html