From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: Re: [PATCH 6/9] serial: tegra: move to generic dma DT binding Date: Fri, 26 Jul 2013 13:39:15 -0600 Message-ID: <51F2D063.5010505@wwwdotorg.org> References: <1374639002-16753-1-git-send-email-rizhao@nvidia.com> <1374639002-16753-7-git-send-email-rizhao@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from avon.wwwdotorg.org ([70.85.31.133]:42584 "EHLO avon.wwwdotorg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759564Ab3GZTjS (ORCPT ); Fri, 26 Jul 2013 15:39:18 -0400 In-Reply-To: <1374639002-16753-7-git-send-email-rizhao@nvidia.com> Sender: linux-serial-owner@vger.kernel.org List-Id: linux-serial@vger.kernel.org To: Richard Zhao Cc: linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-serial@vger.kernel.org, gregkh@linuxfoundation.org On 07/23/2013 10:09 PM, Richard Zhao wrote: > - driver: remove use of nvidia,dma-request-selector > use dma_request_slave_channel to request channel > - update binding doc This patch needs to be amended so that the DMA channel is looked up during probe() rather than open(), to guarantee that deferred probe works. It's possible to hold off probe, but not possible AFAIK to hold off opening the port. From mboxrd@z Thu Jan 1 00:00:00 1970 From: swarren@wwwdotorg.org (Stephen Warren) Date: Fri, 26 Jul 2013 13:39:15 -0600 Subject: [PATCH 6/9] serial: tegra: move to generic dma DT binding In-Reply-To: <1374639002-16753-7-git-send-email-rizhao@nvidia.com> References: <1374639002-16753-1-git-send-email-rizhao@nvidia.com> <1374639002-16753-7-git-send-email-rizhao@nvidia.com> Message-ID: <51F2D063.5010505@wwwdotorg.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 07/23/2013 10:09 PM, Richard Zhao wrote: > - driver: remove use of nvidia,dma-request-selector > use dma_request_slave_channel to request channel > - update binding doc This patch needs to be amended so that the DMA channel is looked up during probe() rather than open(), to guarantee that deferred probe works. It's possible to hold off probe, but not possible AFAIK to hold off opening the port.