linux-kernel - [PATCH 1/3] ASoC: fsl_esai: introduce SoC specific data

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Message-Id: <27af074e47bf2b81e2dce67ea66a9f7301dfcb07.1588320656.git.shengjiu.wang@nxp.com>
Date:   Fri,  1 May 2020 16:12:04 +0800
From:   Shengjiu Wang <shengjiu.wang@....com>
To:     timur@...nel.org, nicoleotsuka@...il.com, Xiubo.Lee@...il.com,
        festevam@...il.com, broonie@...nel.org, perex@...ex.cz,
        tiwai@...e.com, alsa-devel@...a-project.org, lgirdwood@...il.com,
        robh+dt@...nel.org, devicetree@...r.kernel.org
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/3] ASoC: fsl_esai: introduce SoC specific data

Introduce a SoC specific data structure which contains the
differences between the different SoCs.
This makes it easier to support more differences without having
to introduce a new if/else each time.

Signed-off-by: Shengjiu Wang <shengjiu.wang@....com>
---
 sound/soc/fsl/fsl_esai.c | 46 ++++++++++++++++++++++++++++++++--------
 1 file changed, 37 insertions(+), 9 deletions(-)

diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index 84290be778f0..bac65ba7fbad 100644
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -21,6 +21,17 @@
 				SNDRV_PCM_FMTBIT_S20_3LE | \
 				SNDRV_PCM_FMTBIT_S24_LE)
 
+/**
+ * fsl_esai_soc_data: soc specific data
+ *
+ * @imx: for imx platform
+ * @reset_at_xrun: flags for enable reset operaton
+ */
+struct fsl_esai_soc_data {
+	bool imx;
+	bool reset_at_xrun;
+};
+
 /**
  * fsl_esai: ESAI private data
  *
@@ -33,6 +44,7 @@
  * @fsysclk: system clock source to derive HCK, SCK and FS
  * @spbaclk: SPBA clock (optional, depending on SoC design)
  * @task: tasklet to handle the reset operation
+ * @soc: soc specific data
  * @lock: spin lock between hw_reset() and trigger()
  * @fifo_depth: depth of tx/rx FIFO
  * @slot_width: width of each DAI slot
@@ -44,7 +56,6 @@
  * @sck_div: if using PSR/PM dividers for SCKx clock
  * @slave_mode: if fully using DAI slave mode
  * @synchronous: if using tx/rx synchronous mode
- * @reset_at_xrun: flags for enable reset operaton
  * @name: driver name
  */
 struct fsl_esai {
@@ -57,6 +68,7 @@ struct fsl_esai {
 	struct clk *fsysclk;
 	struct clk *spbaclk;
 	struct tasklet_struct task;
+	const struct fsl_esai_soc_data *soc;
 	spinlock_t lock; /* Protect hw_reset and trigger */
 	u32 fifo_depth;
 	u32 slot_width;
@@ -70,10 +82,24 @@ struct fsl_esai {
 	bool sck_div[2];
 	bool slave_mode;
 	bool synchronous;
-	bool reset_at_xrun;
 	char name[32];
 };
 
+static struct fsl_esai_soc_data fsl_esai_vf610 = {
+	.imx = false,
+	.reset_at_xrun = true,
+};
+
+static struct fsl_esai_soc_data fsl_esai_imx35 = {
+	.imx = true,
+	.reset_at_xrun = true,
+};
+
+static struct fsl_esai_soc_data fsl_esai_imx6ull = {
+	.imx = true,
+	.reset_at_xrun = false,
+};
+
 static irqreturn_t esai_isr(int irq, void *devid)
 {
 	struct fsl_esai *esai_priv = (struct fsl_esai *)devid;
@@ -85,7 +111,7 @@ static irqreturn_t esai_isr(int irq, void *devid)
 	regmap_read(esai_priv->regmap, REG_ESAI_SAISR, &saisr);
 
 	if ((saisr & (ESAI_SAISR_TUE | ESAI_SAISR_ROE)) &&
-	    esai_priv->reset_at_xrun) {
+	    esai_priv->soc->reset_at_xrun) {
 		dev_dbg(&pdev->dev, "reset module for xrun\n");
 		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
 				   ESAI_xCR_xEIE_MASK, 0);
@@ -936,9 +962,11 @@ static int fsl_esai_probe(struct platform_device *pdev)
 	esai_priv->pdev = pdev;
 	snprintf(esai_priv->name, sizeof(esai_priv->name), "%pOFn", np);
 
-	if (of_device_is_compatible(np, "fsl,vf610-esai") ||
-	    of_device_is_compatible(np, "fsl,imx35-esai"))
-		esai_priv->reset_at_xrun = true;
+	esai_priv->soc = of_device_get_match_data(&pdev->dev);
+	if (!esai_priv->soc) {
+		dev_err(&pdev->dev, "failed to get soc data\n");
+		return -ENODEV;
+	}
 
 	/* Get the addresses and IRQ */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1063,9 +1091,9 @@ static int fsl_esai_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id fsl_esai_dt_ids[] = {
-	{ .compatible = "fsl,imx35-esai", },
-	{ .compatible = "fsl,vf610-esai", },
-	{ .compatible = "fsl,imx6ull-esai", },
+	{ .compatible = "fsl,imx35-esai", .data = &fsl_esai_imx35 },
+	{ .compatible = "fsl,vf610-esai", .data = &fsl_esai_vf610 },
+	{ .compatible = "fsl,imx6ull-esai", .data = &fsl_esai_imx6ull },
 	{}
 };
 MODULE_DEVICE_TABLE(of, fsl_esai_dt_ids);
-- 
2.21.0