From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus Pargmann Subject: [PATCH v10 5/7] ASoC: fsl-ssi: Use generic DMA bindings if possible Date: Sat, 27 Jul 2013 13:31:54 +0200 Message-ID: <1374924716-23475-6-git-send-email-mpa@pengutronix.de> References: <1374924716-23475-1-git-send-email-mpa@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1374924716-23475-1-git-send-email-mpa@pengutronix.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: linux-arm-kernel@lists.infradead.org Cc: Fabio Estevam , alsa-devel@alsa-project.org, Lars-Peter Clausen , devicetree-discuss@lists.ozlabs.org, Timur Tabi , Liam Girdwood , Grant Likely , Mark Brown , Sascha Hauer , Markus Pargmann , Shawn Guo List-Id: devicetree@vger.kernel.org There may be some platforms using fsl-ssi that do not have a DMA driver with generic DMA bindings. So this patch adds support for the generic DMA bindings, while still accepting the old "fsl,dma-events" property if "dmas" is not found. Signed-off-by: Markus Pargmann Tested-by: Shawn Guo --- Documentation/devicetree/bindings/sound/fsl,ssi.txt | 4 ++++ sound/soc/fsl/fsl_ssi.c | 20 ++++++++++++-------- 2 files changed, 16 insertions(+), 8 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/fsl,ssi.txt b/Documentation/devicetree/bindings/sound/fsl,ssi.txt index e45cbce..088a2c0 100644 --- a/Documentation/devicetree/bindings/sound/fsl,ssi.txt +++ b/Documentation/devicetree/bindings/sound/fsl,ssi.txt @@ -51,6 +51,10 @@ Optional properties: filter the codec stream. This is necessary for some boards where an incompatible codec is connected to this SSI, e.g. on pca100 and pcm043. +- dmas: Generic dma devicetree binding as described in + Documentation/devicetree/bindings/dma/dma.txt. +- dma-names: Two dmas have to be defined, "tx" and "rx", if fsl,imx-fiq + is not defined. Child 'codec' node required properties: - compatible: Compatible list, contains the name of the codec diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 8b075ef..0c072ff 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -794,15 +794,19 @@ static int fsl_ssi_probe(struct platform_device *pdev) &ssi_private->filter_data_tx; ssi_private->dma_params_rx.filter_data = &ssi_private->filter_data_rx; - /* - * TODO: This is a temporary solution and should be changed - * to use generic DMA binding later when the helplers get in. - */ - ret = of_property_read_u32_array(pdev->dev.of_node, + if (!of_property_read_bool(pdev->dev.of_node, "dmas") && + ssi_private->use_dma) { + /* + * FIXME: This is a temporary solution until all + * necessary dma drivers support the generic dma + * bindings. + */ + ret = of_property_read_u32_array(pdev->dev.of_node, "fsl,ssi-dma-events", dma_events, 2); - if (ret && !ssi_private->use_dma) { - dev_err(&pdev->dev, "could not get dma events\n"); - goto error_clk; + if (ret && ssi_private->use_dma) { + dev_err(&pdev->dev, "could not get dma events but fsl-ssi is configured to use DMA\n"); + goto error_clk; + } } shared = of_device_is_compatible(of_get_parent(np), -- 1.8.3.2