From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753425AbaCGNg6 (ORCPT ); Fri, 7 Mar 2014 08:36:58 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:60249 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752232AbaCGNg4 (ORCPT ); Fri, 7 Mar 2014 08:36:56 -0500 From: Peter Ujfalusi To: , CC: , , , , Subject: [PATCH] dma: omap-dma: Implement device_slave_caps callback Date: Fri, 7 Mar 2014 15:36:44 +0200 Message-ID: <1394199404-7870-1-git-send-email-peter.ujfalusi@ti.com> X-Mailer: git-send-email 1.9.0 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/omap-dma.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 64ceca2920b8..b19f04f4390b 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -1088,6 +1088,23 @@ static void omap_dma_free(struct omap_dmadev *od) } } +#define OMAP_DMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) + +static int omap_dma_device_slave_caps(struct dma_chan *dchan, + struct dma_slave_caps *caps) +{ + caps->src_addr_widths = OMAP_DMA_BUSWIDTHS; + caps->dstn_addr_widths = OMAP_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_BURST; + + return 0; +} + static int omap_dma_probe(struct platform_device *pdev) { struct omap_dmadev *od; @@ -1118,6 +1135,7 @@ static int omap_dma_probe(struct platform_device *pdev) od->ddev.device_prep_slave_sg = omap_dma_prep_slave_sg; od->ddev.device_prep_dma_cyclic = omap_dma_prep_dma_cyclic; od->ddev.device_control = omap_dma_control; + od->ddev.device_slave_caps = omap_dma_device_slave_caps; od->ddev.dev = &pdev->dev; INIT_LIST_HEAD(&od->ddev.channels); INIT_LIST_HEAD(&od->pending); -- 1.9.0