From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754011AbaCMJX2 (ORCPT ); Thu, 13 Mar 2014 05:23:28 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:57516 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753723AbaCMJTw (ORCPT ); Thu, 13 Mar 2014 05:19:52 -0400 From: Peter Ujfalusi To: , , , , CC: , , Mark Brown , Liam Girdwood , Tony Lindgren , , Jyri Sarha , , , Subject: [PATCH 08/18] dma: edma: Implement device_slave_caps callback Date: Thu, 13 Mar 2014 11:18:30 +0200 Message-ID: <1394702320-21743-9-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.9.0 In-Reply-To: <1394702320-21743-1-git-send-email-peter.ujfalusi@ti.com> References: <1394702320-21743-1-git-send-email-peter.ujfalusi@ti.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With the callback implemented omap-dma can provide information to client drivers regarding to supported address widths, directions, residue granularity, etc. Signed-off-by: Peter Ujfalusi --- drivers/dma/edma.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 604c7c94c731..1877319379fc 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -851,6 +851,23 @@ static void __init edma_chan_init(struct edma_cc *ecc, } } +#define EDMA_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) + +static int edma_dma_device_slave_caps(struct dma_chan *dchan, + struct dma_slave_caps *caps) +{ + caps->src_addr_widths = EDMA_DMA_BUSWIDTHS; + caps->dstn_addr_widths = EDMA_DMA_BUSWIDTHS; + caps->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); + caps->cmd_pause = true; + caps->cmd_terminate = true; + caps->residue_granularity = DMA_RESIDUE_GRANULARITY_DESCRIPTOR; + + return 0; +} + static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma, struct device *dev) { @@ -861,6 +878,7 @@ static void edma_dma_init(struct edma_cc *ecc, struct dma_device *dma, dma->device_issue_pending = edma_issue_pending; dma->device_tx_status = edma_tx_status; dma->device_control = edma_control; + dma->device_slave_caps = edma_dma_device_slave_caps; dma->dev = dev; INIT_LIST_HEAD(&dma->channels); -- 1.9.0