spi: sun6i: change OF match data to a struct

As we're adding more properties to the OF match data, convert it to a
struct now.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io
Signed-off-by: Maksim Kiselev <bigunclemax@gmail.com
Reviewed-by: Samuel Holland <samuel@sholland.org
Reviewed-by: Andre Przywara <andre.przywara@arm.com
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com
Link: https://lore.kernel.org/r/20230510081121.3463710-3-bigunclemax@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org

drivers/spi/spi-sun6i.c

@@ -85,6 +85,10 @@
 #define SUN6I_TXDATA_REG		0x200
 #define SUN6I_RXDATA_REG		0x300
 
+struct sun6i_spi_cfg {
+	unsigned long		fifo_depth;
+};
+
 struct sun6i_spi {
 	struct spi_master	*master;
 	void __iomem		*base_addr;
@@ -99,7 +103,7 @@ struct sun6i_spi {
 	const u8		*tx_buf;
 	u8			*rx_buf;
 	int			len;
-	unsigned long		fifo_depth;
+	const struct sun6i_spi_cfg *cfg;
 };
 
 static inline u32 sun6i_spi_read(struct sun6i_spi *sspi, u32 reg)
@@ -156,7 +160,7 @@ static inline void sun6i_spi_fill_fifo(struct sun6i_spi *sspi)
 	u8 byte;
 
 	/* See how much data we can fit */
-	cnt = sspi->fifo_depth - sun6i_spi_get_tx_fifo_count(sspi);
+	cnt = sspi->cfg->fifo_depth - sun6i_spi_get_tx_fifo_count(sspi);
 
 	len = min((int)cnt, sspi->len);
 
@@ -289,14 +293,14 @@ static int sun6i_spi_transfer_one(struct spi_master *master,
 		 * the hardcoded value used in old generation of Allwinner
 		 * SPI controller. (See spi-sun4i.c)
 		 */
-		trig_level = sspi->fifo_depth / 4 * 3;
+		trig_level = sspi->cfg->fifo_depth / 4 * 3;
 	} else {
 		/*
 		 * Setup FIFO DMA request trigger level
 		 * We choose 1/2 of the full fifo depth, that value will
 		 * be used as DMA burst length.
 		 */
-		trig_level = sspi->fifo_depth / 2;
+		trig_level = sspi->cfg->fifo_depth / 2;
 
 		if (tfr->tx_buf)
 			reg |= SUN6I_FIFO_CTL_TF_DRQ_EN;
@@ -410,9 +414,9 @@ static int sun6i_spi_transfer_one(struct spi_master *master,
 	reg = SUN6I_INT_CTL_TC;
 
 	if (!use_dma) {
-		if (rx_len > sspi->fifo_depth)
+		if (rx_len > sspi->cfg->fifo_depth)
 			reg |= SUN6I_INT_CTL_RF_RDY;
-		if (tx_len > sspi->fifo_depth)
+		if (tx_len > sspi->cfg->fifo_depth)
 			reg |= SUN6I_INT_CTL_TF_ERQ;
 	}
 
@@ -543,7 +547,7 @@ static bool sun6i_spi_can_dma(struct spi_master *master,
 	 * the fifo length we can just fill the fifo and wait for a single
 	 * irq, so don't bother setting up dma
 	 */
-	return xfer->len > sspi->fifo_depth;
+	return xfer->len > sspi->cfg->fifo_depth;
 }
 
 static int sun6i_spi_probe(struct platform_device *pdev)
@@ -582,7 +586,7 @@ static int sun6i_spi_probe(struct platform_device *pdev)
 	}
 
 	sspi->master = master;
-	sspi->fifo_depth = (unsigned long)of_device_get_match_data(&pdev->dev);
+	sspi->cfg = of_device_get_match_data(&pdev->dev);
 
 	master->max_speed_hz = 100 * 1000 * 1000;
 	master->min_speed_hz = 3 * 1000;
@@ -695,9 +699,17 @@ static void sun6i_spi_remove(struct platform_device *pdev)
 		dma_release_channel(master->dma_rx);
 }
 
+static const struct sun6i_spi_cfg sun6i_a31_spi_cfg = {
+	.fifo_depth	= SUN6I_FIFO_DEPTH,
+};
+
+static const struct sun6i_spi_cfg sun8i_h3_spi_cfg = {
+	.fifo_depth	= SUN8I_FIFO_DEPTH,
+};
+
 static const struct of_device_id sun6i_spi_match[] = {
-	{ .compatible = "allwinner,sun6i-a31-spi", .data = (void *)SUN6I_FIFO_DEPTH },
-	{ .compatible = "allwinner,sun8i-h3-spi",  .data = (void *)SUN8I_FIFO_DEPTH },
+	{ .compatible = "allwinner,sun6i-a31-spi", .data = &sun6i_a31_spi_cfg },
+	{ .compatible = "allwinner,sun8i-h3-spi",  .data = &sun8i_h3_spi_cfg },
 	{}
 };
 MODULE_DEVICE_TABLE(of, sun6i_spi_match);