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d="scan'208";a="111511733" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 01 Mar 2021 10:09:53 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Mon, 1 Mar 2021 10:09:53 -0700 Received: from rob-ult-m19940.amer.actel.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Mon, 1 Mar 2021 10:09:50 -0700 From: Codrin Ciubotariu To: , , , Subject: [PATCH v2 5/7] ASoC: mchp-i2s-mcc: Add support to select TDM pins Date: Mon, 1 Mar 2021 19:09:03 +0200 Message-ID: <20210301170905.835091-6-codrin.ciubotariu@microchip.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210301170905.835091-1-codrin.ciubotariu@microchip.com> References: <20210301170905.835091-1-codrin.ciubotariu@microchip.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210301_120954_836268_ABFF21EE X-CRM114-Status: GOOD ( 18.22 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: alexandre.belloni@bootlin.com, lgirdwood@gmail.com, robh+dt@kernel.org, tiwai@suse.com, ludovic.desroches@microchip.com, broonie@kernel.org, Codrin Ciubotariu , perex@perex.cz Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org SAMA7G5's I2S-MCC has 4 pairs of DIN/DOUT pins. Since TDM only uses a single pair of pins for synchronous capture and playback, the controller needs to be told which of the pair is connected. This can be mentioned using the "microchip,tdm-data-pair" property from DT. The property is optional, useful only if TDM is used. If it's missing, DIN/DOUT 0 pins will be used by default. Signed-off-by: Codrin Ciubotariu --- Changes in v2: - none sound/soc/atmel/mchp-i2s-mcc.c | 52 +++++++++++++++++++++++++++++++--- 1 file changed, 48 insertions(+), 4 deletions(-) diff --git a/sound/soc/atmel/mchp-i2s-mcc.c b/sound/soc/atmel/mchp-i2s-mcc.c index 52d3f43148dc..515ba3634fdd 100644 --- a/sound/soc/atmel/mchp-i2s-mcc.c +++ b/sound/soc/atmel/mchp-i2s-mcc.c @@ -100,6 +100,8 @@ #define MCHP_I2SMCC_MRA_DATALENGTH_8_BITS_COMPACT (7 << 1) #define MCHP_I2SMCC_MRA_WIRECFG_MASK GENMASK(5, 4) +#define MCHP_I2SMCC_MRA_WIRECFG_TDM(pin) (((pin) << 4) & \ + MCHP_I2SMCC_MRA_WIRECFG_MASK) #define MCHP_I2SMCC_MRA_WIRECFG_I2S_1_TDM_0 (0 << 4) #define MCHP_I2SMCC_MRA_WIRECFG_I2S_2_TDM_1 (1 << 4) #define MCHP_I2SMCC_MRA_WIRECFG_I2S_4_TDM_2 (2 << 4) @@ -245,6 +247,7 @@ struct mchp_i2s_mcc_dev { unsigned int frame_length; int tdm_slots; int channels; + u8 tdm_data_pair; unsigned int gclk_use:1; unsigned int gclk_running:1; unsigned int tx_rdy:1; @@ -589,6 +592,8 @@ static int mchp_i2s_mcc_hw_params(struct snd_pcm_substream *substream, if (!frame_length) frame_length = 2 * params_physical_width(params); } else if (dev->fmt & SND_SOC_DAIFMT_DSP_A) { + mra |= MCHP_I2SMCC_MRA_WIRECFG_TDM(dev->tdm_data_pair); + if (dev->tdm_slots) { if (channels % 2 && channels * 2 <= dev->tdm_slots) { /* @@ -914,6 +919,45 @@ static const struct of_device_id mchp_i2s_mcc_dt_ids[] = { MODULE_DEVICE_TABLE(of, mchp_i2s_mcc_dt_ids); #endif +static int mchp_i2s_mcc_soc_data_parse(struct platform_device *pdev, + struct mchp_i2s_mcc_dev *dev) +{ + int err; + + if (!dev->soc) { + dev_err(&pdev->dev, "failed to get soc data\n"); + return -ENODEV; + } + + if (dev->soc->data_pin_pair_num == 1) + return 0; + + err = of_property_read_u8(pdev->dev.of_node, "microchip,tdm-data-pair", + &dev->tdm_data_pair); + if (err < 0 && err != -EINVAL) { + dev_err(&pdev->dev, + "bad property data for 'microchip,tdm-data-pair': %d", + err); + return err; + } + if (err == -EINVAL) { + dev_info(&pdev->dev, + "'microchip,tdm-data-pair' not found; assuming DIN/DOUT 0 for TDM\n"); + dev->tdm_data_pair = 0; + } else { + if (dev->tdm_data_pair > dev->soc->data_pin_pair_num - 1) { + dev_err(&pdev->dev, + "invalid value for 'microchip,tdm-data-pair': %d\n", + dev->tdm_data_pair); + return -EINVAL; + } + dev_dbg(&pdev->dev, "TMD format on DIN/DOUT %d pins\n", + dev->tdm_data_pair); + } + + return 0; +} + static int mchp_i2s_mcc_probe(struct platform_device *pdev) { struct mchp_i2s_mcc_dev *dev; @@ -966,10 +1010,10 @@ static int mchp_i2s_mcc_probe(struct platform_device *pdev) } dev->soc = of_device_get_match_data(&pdev->dev); - if (!dev->soc) { - dev_err(&pdev->dev, "failed to get soc data\n"); - return -ENODEV; - } + err = mchp_i2s_mcc_soc_data_parse(pdev, dev); + if (err < 0) + return err; + dev->dev = &pdev->dev; dev->regmap = regmap; platform_set_drvdata(pdev, dev); -- 2.27.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel