linux-kernel - [PATCH v6 03/17] ASoC: fsl_ssi: Clean up set_dai_tdm

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Message-Id: <1518473005-14090-4-git-send-email-nicoleotsuka@gmail.com>
Date:   Mon, 12 Feb 2018 14:03:11 -0800
From:   Nicolin Chen <nicoleotsuka@...il.com>
To:     broonie@...nel.org, timur@...i.org
Cc:     caleb@...me.org, mail@...iej.szmigiero.name, fabio.estevam@....com,
        alsa-devel@...a-project.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, lgirdwood@...il.com,
        arnaud.mouiche@...oxia.com, lukma@...x.de, kernel@...gutronix.de
Subject: [PATCH v6 03/17] ASoC: fsl_ssi: Clean up set_dai_tdm_slot()

This patch replaces the register read with ssi->i2s_net for
simplification. It also removes masking SSIEN from scr value
since it's handled later by regmap_update_bits() to set this
scr value back.

Signed-off-by: Nicolin Chen <nicoleotsuka@...il.com>
Tested-by: Caleb Crome <caleb@...me.org>
Tested-by: Maciej S. Szmigiero <mail@...iej.szmigiero.name>
Reviewed-by: Maciej S. Szmigiero <mail@...iej.szmigiero.name>
---
 sound/soc/fsl/fsl_ssi.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index d4f1f0d..14046c3 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -1055,9 +1055,7 @@ static int fsl_ssi_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask,
 	}
 
 	/* The slot number should be >= 2 if using Network mode or I2S mode */
-	regmap_read(regs, REG_SSI_SCR, &val);
-	val &= SSI_SCR_I2S_MODE_MASK | SSI_SCR_NET;
-	if (val && slots < 2) {
+	if (ssi->i2s_net && slots < 2) {
 		dev_err(dai->dev, "slot number should be >= 2 in I2S or NET\n");
 		return -EINVAL;
 	}
@@ -1067,9 +1065,8 @@ static int fsl_ssi_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask,
 	regmap_update_bits(regs, REG_SSI_SRCCR,
 			   SSI_SxCCR_DC_MASK, SSI_SxCCR_DC(slots));
 
-	/* Save SSIEN bit of the SCR register */
+	/* Save the SCR register value */
 	regmap_read(regs, REG_SSI_SCR, &val);
-	val &= SSI_SCR_SSIEN;
 	/* Temporarily enable SSI to allow SxMSKs to be configurable */
 	regmap_update_bits(regs, REG_SSI_SCR, SSI_SCR_SSIEN, SSI_SCR_SSIEN);
 
-- 
2.1.4