From patchwork Thu Apr 10 15:18:11 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolin Chen X-Patchwork-Id: 338141 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 0391B14007E for ; Fri, 11 Apr 2014 01:16:47 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753011AbaDJPQp (ORCPT ); Thu, 10 Apr 2014 11:16:45 -0400 Received: from va3ehsobe005.messaging.microsoft.com ([216.32.180.31]:6645 "EHLO va3outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752992AbaDJPQn (ORCPT ); Thu, 10 Apr 2014 11:16:43 -0400 Received: from mail172-va3-R.bigfish.com (10.7.14.254) by VA3EHSOBE010.bigfish.com (10.7.40.12) with Microsoft SMTP Server id 14.1.225.22; Thu, 10 Apr 2014 15:16:19 +0000 Received: from mail172-va3 (localhost [127.0.0.1]) by mail172-va3-R.bigfish.com (Postfix) with ESMTP id 27F1160130; Thu, 10 Apr 2014 15:16:19 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: -4 X-BigFish: VS-4(zz1458K154dIzz1f42h2148h1ee6h1de0h1fdah2073h2146h1202h1e76h2189h1d1ah1d2ah21bch1fc6h208chzz1de098h8275bh1de097hz2dh2a8h839he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh2222h224fh1fb3h1d0ch1d2eh1d3fh1dc1h1dfeh1dffh1e23h1fe8h1ff5h2218h2216h226dh22d0h24afh2327h2336h2438h2461h2487h24d7h2516h2545h255eh25cch25f6h2605h268bh26d3h1155h) Received: from mail172-va3 (localhost.localdomain [127.0.0.1]) by mail172-va3 (MessageSwitch) id 1397142977236061_3530; Thu, 10 Apr 2014 15:16:17 +0000 (UTC) Received: from VA3EHSMHS005.bigfish.com (unknown [10.7.14.230]) by mail172-va3.bigfish.com (Postfix) with ESMTP id 29780300073; Thu, 10 Apr 2014 15:16:17 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by VA3EHSMHS005.bigfish.com (10.7.99.15) with Microsoft SMTP Server (TLS) id 14.16.227.3; Thu, 10 Apr 2014 15:16:17 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-002.039d.mgd.msft.net (10.84.1.15) with Microsoft SMTP Server (TLS) id 14.3.174.2; Thu, 10 Apr 2014 15:16:39 +0000 Received: from rio.ap.freescale.net (rio.ap.freescale.net [10.192.242.9]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id s3AFGVTL028739; Thu, 10 Apr 2014 08:16:32 -0700 From: Nicolin Chen To: CC: , , , , , , , , , , , , , Subject: [PATCH v6] ASoC: fsl_sai: Add clock controls for SAI Date: Thu, 10 Apr 2014 23:18:11 +0800 Message-ID: <1397143092-10388-1-git-send-email-Guangyu.Chen@freescale.com> X-Mailer: git-send-email 1.8.4 MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-FOPE-CONNECTOR: Id%0$Dn%FREESCALE.MAIL.ONMICROSOFT.COM$RO%1$TLS%0$FQDN%$TlsDn% Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The SAI mainly has the following clocks: bus clock control and configure registers and to generate synchronous interrupts and DMA requests. mclk1, mclk2, mclk3 to generate the bit clock when the receiver or transmitter is configured for an internally generated bit clock. So this patch adds these clocks and their clock controls to the driver. [ To concern the old DTB cases, I've added a bit of extra code to make the driver compatible with them. And by marking clock NULL if failed to get, the clk_prepare() or clk_get_rate() would easily return 0 so no further path should be broken. -- by Nicolin ] Signed-off-by: Nicolin Chen Acked-by: Xiubo Li --- Changelog v6: * Dropped the dtsi change since it's no more demanded with this patch. * Removed Shawn's ACK since we no long change dtsi in this case. v5: * Dropped mclk preparing and enabling since we are not using them currecntly. * Made the change compatible to the old DTB. * Added returned error value print. v4: * Merged into single patch. * Fixed bus clock ID on vf610. v3: * Use int type for ret instead of u32. * Added Acked-by and Tested-by from Xiubo Li. v2: * Appended two extra mclks to the driver since SAI actually has three. * Renamed clock name to 'bus' and 'mclk' according to the reference manual. .../devicetree/bindings/sound/fsl-sai.txt | 9 +++-- sound/soc/fsl/fsl_sai.c | 38 ++++++++++++++++++++-- sound/soc/fsl/fsl_sai.h | 4 +++ 3 files changed, 46 insertions(+), 5 deletions(-) diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt index 35c09fe..0f4e238 100644 --- a/Documentation/devicetree/bindings/sound/fsl-sai.txt +++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt @@ -10,7 +10,8 @@ Required properties: - compatible: Compatible list, contains "fsl,vf610-sai" or "fsl,imx6sx-sai". - reg: Offset and length of the register set for the device. - clocks: Must contain an entry for each entry in clock-names. -- clock-names : Must include the "sai" entry. +- clock-names : Must include the "bus" for register access and "mclk1" "mclk2" + "mclk3" for bit clock and frame clock providing. - 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". @@ -30,8 +31,10 @@ sai2: sai@40031000 { reg = <0x40031000 0x1000>; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_sai2_1>; - clocks = <&clks VF610_CLK_SAI2>; - clock-names = "sai"; + clocks = <&clks VF610_CLK_PLATFORM_BUS>, + <&clks VF610_CLK_SAI2>, + <&clks 0>, <&clks 0>; + clock-names = "bus", "mclk1", "mclk2", "mclk3"; dma-names = "tx", "rx"; dmas = <&edma0 0 VF610_EDMA_MUXID0_SAI2_TX>, <&edma0 0 VF610_EDMA_MUXID0_SAI2_RX>; diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index db9f75e..5fff2e1 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -401,7 +401,15 @@ static int fsl_sai_startup(struct snd_pcm_substream *substream, struct snd_soc_dai *cpu_dai) { struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai); + struct device *dev = &sai->pdev->dev; u32 reg; + int ret; + + ret = clk_prepare_enable(sai->bus_clk); + if (ret) { + dev_err(dev, "failed to enable bus clock: %d\n", ret); + return ret; + } if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) reg = FSL_SAI_TCR3; @@ -427,6 +435,8 @@ static void fsl_sai_shutdown(struct snd_pcm_substream *substream, regmap_update_bits(sai->regmap, reg, FSL_SAI_CR3_TRCE, ~FSL_SAI_CR3_TRCE); + + clk_disable_unprepare(sai->bus_clk); } static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = { @@ -559,7 +569,8 @@ static int fsl_sai_probe(struct platform_device *pdev) struct fsl_sai *sai; struct resource *res; void __iomem *base; - int irq, ret; + char tmp[8]; + int irq, ret, i; sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL); if (!sai) @@ -582,12 +593,35 @@ static int fsl_sai_probe(struct platform_device *pdev) return PTR_ERR(base); sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, - "sai", base, &fsl_sai_regmap_config); + "bus", base, &fsl_sai_regmap_config); + + /* Compatible with old DTB cases */ + if (IS_ERR(sai->regmap)) + sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev, + "sai", base, &fsl_sai_regmap_config); if (IS_ERR(sai->regmap)) { dev_err(&pdev->dev, "regmap init failed\n"); return PTR_ERR(sai->regmap); } + /* No error out for old DTB cases but only mark the clock NULL */ + sai->bus_clk = devm_clk_get(&pdev->dev, "bus"); + if (IS_ERR(sai->bus_clk)) { + dev_err(&pdev->dev, "failed to get bus clock: %ld\n", + PTR_ERR(sai->bus_clk)); + sai->bus_clk = NULL; + } + + for (i = 0; i < FSL_SAI_MCLK_MAX; i++) { + sprintf(tmp, "mclk%d", i + 1); + sai->mclk_clk[i] = devm_clk_get(&pdev->dev, tmp); + if (IS_ERR(sai->mclk_clk[i])) { + dev_err(&pdev->dev, "failed to get mclk%d clock: %ld\n", + i + 1, PTR_ERR(sai->mclk_clk[i])); + sai->mclk_clk[i] = NULL; + } + } + irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(&pdev->dev, "no irq for node %s\n", np->full_name); diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h index 677670d..0e6c9f5 100644 --- a/sound/soc/fsl/fsl_sai.h +++ b/sound/soc/fsl/fsl_sai.h @@ -119,6 +119,8 @@ #define FSL_SAI_CLK_MAST2 2 #define FSL_SAI_CLK_MAST3 3 +#define FSL_SAI_MCLK_MAX 3 + /* SAI data transfer numbers per DMA request */ #define FSL_SAI_MAXBURST_TX 6 #define FSL_SAI_MAXBURST_RX 6 @@ -126,6 +128,8 @@ struct fsl_sai { struct platform_device *pdev; struct regmap *regmap; + struct clk *bus_clk; + struct clk *mclk_clk[FSL_SAI_MCLK_MAX]; bool big_endian_regs; bool big_endian_data;