spi/xilinx: Remove remains of of_platform device registration

In the past there used to be a separate platform device type for device
tree systems so the probe and removal functions were split into generic
and bus sections. Since this is no longer the case simplify the code (and
remove some unprototyped exports) by factoring everything into the bus
probe() and remove().
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-xilinx.c

@@ -340,17 +340,51 @@ static const struct of_device_id xilinx_spi_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
 
-struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
-	u32 irq, s16 bus_num, int num_cs, int bits_per_word)
+static int xilinx_spi_probe(struct platform_device *dev)
 {
-	struct spi_master *master;
 	struct xilinx_spi *xspi;
-	int ret;
+	struct xspi_platform_data *pdata;
+	struct resource *r;
+	int ret, irq, num_cs = 0, bits_per_word = 8;
+	struct spi_master *master;
 	u32 tmp;
+	u8 i;
+
+	pdata = dev->dev.platform_data;
+	if (pdata) {
+		num_cs = pdata->num_chipselect;
+		bits_per_word = pdata->bits_per_word;
+	}
+
+#ifdef CONFIG_OF
+	if (dev->dev.of_node) {
+		const __be32 *prop;
+		int len;
+
+		/* number of slave select bits is required */
+		prop = of_get_property(dev->dev.of_node, "xlnx,num-ss-bits",
+				       &len);
+		if (prop && len >= sizeof(*prop))
+			num_cs = __be32_to_cpup(prop);
+	}
+#endif
 
-	master = spi_alloc_master(dev, sizeof(struct xilinx_spi));
+	if (!num_cs) {
+		dev_err(&dev->dev, "Missing slave select configuration data\n");
+		return -EINVAL;
+	}
+
+	r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -ENODEV;
+
+	irq = platform_get_irq(dev, 0);
+	if (irq < 0)
+		return -ENXIO;
+
+	master = spi_alloc_master(&dev->dev, sizeof(struct xilinx_spi));
 	if (!master)
-		return NULL;
+		return -ENODEV;
 
 	/* the spi->mode bits understood by this driver: */
 	master->mode_bits = SPI_CPOL | SPI_CPHA;
@@ -362,17 +396,17 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
 	xspi->bitbang.txrx_bufs = xilinx_spi_txrx_bufs;
 	init_completion(&xspi->done);
 
-	xspi->regs = devm_ioremap_resource(dev, mem);
+	xspi->regs = devm_ioremap_resource(&dev->dev, r);
 	if (IS_ERR(xspi->regs)) {
 		ret = PTR_ERR(xspi->regs);
 		goto put_master;
 	}
 
-	master->bus_num = bus_num;
+	master->bus_num = dev->dev.id;
 	master->num_chipselect = num_cs;
-	master->dev.of_node = dev->of_node;
+	master->dev.of_node = dev->dev.of_node;
 
-	xspi->mem = *mem;
+	xspi->mem = *r;
 	xspi->irq = irq;
 
 	/*
@@ -403,8 +437,10 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
 	} else if (xspi->bits_per_word == 32) {
 		xspi->tx_fn = xspi_tx32;
 		xspi->rx_fn = xspi_rx32;
-	} else
+	} else {
+		ret = -EINVAL;
 		goto put_master;
+	}
 
 
 	/* SPI controller initializations */
@@ -417,93 +453,38 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
 
 	ret = spi_bitbang_start(&xspi->bitbang);
 	if (ret) {
-		dev_err(dev, "spi_bitbang_start FAILED\n");
+		dev_err(&dev->dev, "spi_bitbang_start FAILED\n");
 		goto free_irq;
 	}
 
-	dev_info(dev, "at 0x%08llX mapped to 0x%p, irq=%d\n",
-		(unsigned long long)mem->start, xspi->regs, xspi->irq);
-	return master;
+	dev_info(&dev->dev, "at 0x%08llX mapped to 0x%p, irq=%d\n",
+		(unsigned long long)r->start, xspi->regs, xspi->irq);
+
+	if (pdata) {
+		for (i = 0; i < pdata->num_devices; i++)
+			spi_new_device(master, pdata->devices + i);
+	}
+
+	platform_set_drvdata(dev, master);
+	return 0;
 
 free_irq:
 	free_irq(xspi->irq, xspi);
 put_master:
 	spi_master_put(master);
-	return NULL;
+
+	return ret;
 }
-EXPORT_SYMBOL(xilinx_spi_init);
 
-void xilinx_spi_deinit(struct spi_master *master)
+static int xilinx_spi_remove(struct platform_device *dev)
 {
-	struct xilinx_spi *xspi;
-
-	xspi = spi_master_get_devdata(master);
+	struct spi_master *master = platform_get_drvdata(dev);
+	struct xilinx_spi *xspi = spi_master_get_devdata(master);
 
 	spi_bitbang_stop(&xspi->bitbang);
 	free_irq(xspi->irq, xspi);
 
 	spi_master_put(xspi->bitbang.master);
-}
-EXPORT_SYMBOL(xilinx_spi_deinit);
-
-static int xilinx_spi_probe(struct platform_device *dev)
-{
-	struct xspi_platform_data *pdata;
-	struct resource *r;
-	int irq, num_cs = 0, bits_per_word = 8;
-	struct spi_master *master;
-	u8 i;
-
-	pdata = dev->dev.platform_data;
-	if (pdata) {
-		num_cs = pdata->num_chipselect;
-		bits_per_word = pdata->bits_per_word;
-	}
-
-#ifdef CONFIG_OF
-	if (dev->dev.of_node) {
-		const __be32 *prop;
-		int len;
-
-		/* number of slave select bits is required */
-		prop = of_get_property(dev->dev.of_node, "xlnx,num-ss-bits",
-				       &len);
-		if (prop && len >= sizeof(*prop))
-			num_cs = __be32_to_cpup(prop);
-	}
-#endif
-
-	if (!num_cs) {
-		dev_err(&dev->dev, "Missing slave select configuration data\n");
-		return -EINVAL;
-	}
-
-
-	r = platform_get_resource(dev, IORESOURCE_MEM, 0);
-	if (!r)
-		return -ENODEV;
-
-	irq = platform_get_irq(dev, 0);
-	if (irq < 0)
-		return -ENXIO;
-
-	master = xilinx_spi_init(&dev->dev, r, irq, dev->id, num_cs,
-				 bits_per_word);
-	if (!master)
-		return -ENODEV;
-
-	if (pdata) {
-		for (i = 0; i < pdata->num_devices; i++)
-			spi_new_device(master, pdata->devices + i);
-	}
-
-	platform_set_drvdata(dev, master);
-	return 0;
-}
-
-static int xilinx_spi_remove(struct platform_device *dev)
-{
-	xilinx_spi_deinit(platform_get_drvdata(dev));
 
 	return 0;
 }