Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6

* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (23 commits)
  spi: fix probe/remove section markings
  Add OMAP spi100k driver
  spi-imx: don't access struct device directly but use dev_get_platdata
  spi-imx: Add mx25 support
  spi-imx: use positive logic to distinguish cpu variants
  spi-imx: correct check for platform_get_irq failing
  ARM: NUC900: Add spi driver support for nuc900
  spi: SuperH MSIOF SPI Master driver V2
  spi: fix spidev compilation failure when VERBOSE is defined
  spi/au1550_spi: fix setupxfer not to override cfg with zeros
  spi/mpc8xxx: don't use __exit_p to wrap plat_mpc8xxx_spi_remove
  spi/i.MX: fix broken error handling for gpio_request
  spi/i.mx: drain MXC SPI transfer buffer when probing device
  MAINTAINERS: add SPI co-maintainer.
  spi/xilinx_spi: fix incorrect casting
  spi/mpc52xx-spi: minor cleanups
  xilinx_spi: add a platform driver using the xilinx_spi common module.
  xilinx_spi: add support for the DS570 IP.
  xilinx_spi: Switch to iomem functions and support little endian.
  xilinx_spi: Split into of driver and generic part.
  ...

MAINTAINERS

@@ -5080,6 +5080,7 @@ F:	drivers/char/specialix*
 
 SPI SUBSYSTEM
 M:	David Brownell <dbrownell@users.sourceforge.net>
+M:	Grant Likely <grant.likely@secretlab.ca>
 L:	spi-devel-general@lists.sourceforge.net
 S:	Maintained
 F:	Documentation/spi/

arch/arm/mach-w90x900/include/mach/nuc900_spi.h

+/*
+ * arch/arm/mach-w90x900/include/mach/nuc900_spi.h
+ *
+ * Copyright (c) 2009 Nuvoton technology corporation.
+ *
+ * Wan ZongShun <mcuos.com@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation;version 2 of the License.
+ *
+ */
+
+#ifndef __ASM_ARCH_SPI_H
+#define __ASM_ARCH_SPI_H
+
+extern void mfp_set_groupg(struct device *dev);
+
+struct nuc900_spi_info {
+	unsigned int num_cs;
+	unsigned int lsb;
+	unsigned int txneg;
+	unsigned int rxneg;
+	unsigned int divider;
+	unsigned int sleep;
+	unsigned int txnum;
+	unsigned int txbitlen;
+	int bus_num;
+};
+
+struct nuc900_spi_chip {
+	unsigned char bits_per_word;
+};
+
+#endif /* __ASM_ARCH_SPI_H */

drivers/spi/Kconfig

@@ -169,6 +169,12 @@ config SPI_OMAP24XX
 	  SPI master controller for OMAP24xx/OMAP34xx Multichannel SPI
 	  (McSPI) modules.
 
+config SPI_OMAP_100K
+	tristate "OMAP SPI 100K"
+	depends on SPI_MASTER && (ARCH_OMAP850 || ARCH_OMAP730)
+	help
+	  OMAP SPI 100K master controller for omap7xx boards.
+
 config SPI_ORION
 	tristate "Orion SPI master (EXPERIMENTAL)"
 	depends on PLAT_ORION && EXPERIMENTAL
@@ -220,6 +226,13 @@ config SPI_S3C24XX_GPIO
 	  the inbuilt hardware cannot provide the transfer mode, or
 	  where the board is using non hardware connected pins.
 
+config SPI_SH_MSIOF
+	tristate "SuperH MSIOF SPI controller"
+	depends on SUPERH && HAVE_CLK
+	select SPI_BITBANG
+	help
+	  SPI driver for SuperH MSIOF blocks.
+
 config SPI_SH_SCI
 	tristate "SuperH SCI SPI controller"
 	depends on SUPERH
@@ -240,15 +253,38 @@ config SPI_TXX9
 	  SPI driver for Toshiba TXx9 MIPS SoCs
 
 config SPI_XILINX
-	tristate "Xilinx SPI controller"
-	depends on (XILINX_VIRTEX || MICROBLAZE) && EXPERIMENTAL
+	tristate "Xilinx SPI controller common module"
+	depends on HAS_IOMEM && EXPERIMENTAL
 	select SPI_BITBANG
+	select SPI_XILINX_OF if (XILINX_VIRTEX || MICROBLAZE)
 	help
 	  This exposes the SPI controller IP from the Xilinx EDK.
 
 	  See the "OPB Serial Peripheral Interface (SPI) (v1.00e)"
 	  Product Specification document (DS464) for hardware details.
 
+	  Or for the DS570, see "XPS Serial Peripheral Interface (SPI) (v2.00b)"
+
+config SPI_XILINX_OF
+	tristate "Xilinx SPI controller OF device"
+	depends on SPI_XILINX && (XILINX_VIRTEX || MICROBLAZE)
+	help
+	  This is the OF driver for the SPI controller IP from the Xilinx EDK.
+
+config SPI_XILINX_PLTFM
+	tristate "Xilinx SPI controller platform device"
+	depends on SPI_XILINX
+	help
+	  This is the platform driver for the SPI controller IP
+	  from the Xilinx EDK.
+
+config SPI_NUC900
+	tristate "Nuvoton NUC900 series SPI"
+	depends on ARCH_W90X900 && EXPERIMENTAL
+	select SPI_BITBANG
+	help
+	  SPI driver for Nuvoton NUC900 series ARM SoCs
+
 #
 # Add new SPI master controllers in alphabetical order above this line
 #

drivers/spi/Makefile

@@ -22,6 +22,7 @@ obj-$(CONFIG_SPI_LM70_LLP)		+= spi_lm70llp.o
 obj-$(CONFIG_SPI_PXA2XX)		+= pxa2xx_spi.o
 obj-$(CONFIG_SPI_OMAP_UWIRE)		+= omap_uwire.o
 obj-$(CONFIG_SPI_OMAP24XX)		+= omap2_mcspi.o
+obj-$(CONFIG_SPI_OMAP_100K)		+= omap_spi_100k.o
 obj-$(CONFIG_SPI_ORION)			+= orion_spi.o
 obj-$(CONFIG_SPI_PL022)			+= amba-pl022.o
 obj-$(CONFIG_SPI_MPC52xx_PSC)		+= mpc52xx_psc_spi.o
@@ -32,8 +33,12 @@ obj-$(CONFIG_SPI_S3C24XX_GPIO)		+= spi_s3c24xx_gpio.o
 obj-$(CONFIG_SPI_S3C24XX)		+= spi_s3c24xx.o
 obj-$(CONFIG_SPI_TXX9)			+= spi_txx9.o
 obj-$(CONFIG_SPI_XILINX)		+= xilinx_spi.o
+obj-$(CONFIG_SPI_XILINX_OF)		+= xilinx_spi_of.o
+obj-$(CONFIG_SPI_XILINX_PLTFM)		+= xilinx_spi_pltfm.o
 obj-$(CONFIG_SPI_SH_SCI)		+= spi_sh_sci.o
+obj-$(CONFIG_SPI_SH_MSIOF)		+= spi_sh_msiof.o
 obj-$(CONFIG_SPI_STMP3XXX)		+= spi_stmp.o
+obj-$(CONFIG_SPI_NUC900)		+= spi_nuc900.o
 # 	... add above this line ...
 
 # SPI protocol drivers (device/link on bus)

drivers/spi/au1550_spi.c

@@ -237,8 +237,14 @@ static int au1550_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
 	unsigned bpw, hz;
 	u32 cfg, stat;
 
-	bpw = t ? t->bits_per_word : spi->bits_per_word;
-	hz = t ? t->speed_hz : spi->max_speed_hz;
+	bpw = spi->bits_per_word;
+	hz = spi->max_speed_hz;
+	if (t) {
+		if (t->bits_per_word)
+			bpw = t->bits_per_word;
+		if (t->speed_hz)
+			hz = t->speed_hz;
+	}
 
 	if (bpw < 4 || bpw > 24) {
 		dev_err(&spi->dev, "setupxfer: invalid bits_per_word=%d\n",

drivers/spi/mpc52xx_spi.c

@@ -18,9 +18,9 @@
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/spi/spi.h>
-#include <linux/spi/mpc52xx_spi.h>
 #include <linux/of_spi.h>
 #include <linux/io.h>
+#include <linux/of_gpio.h>
 #include <asm/time.h>
 #include <asm/mpc52xx.h>
 
@@ -53,7 +53,7 @@ MODULE_LICENSE("GPL");
 /* FSM state return values */
 #define FSM_STOP	0	/* Nothing more for the state machine to */
 				/* do.  If something interesting happens */
-				/* then and IRQ will be received */
+				/* then an IRQ will be received */
 #define FSM_POLL	1	/* need to poll for completion, an IRQ is */
 				/* not expected */
 #define FSM_CONTINUE	2	/* Keep iterating the state machine */
@@ -61,13 +61,12 @@ MODULE_LICENSE("GPL");
 /* Driver internal data */
 struct mpc52xx_spi {
 	struct spi_master *master;
-	u32 sysclk;
 	void __iomem *regs;
 	int irq0;	/* MODF irq */
 	int irq1;	/* SPIF irq */
-	int ipb_freq;
+	unsigned int ipb_freq;
 
-	/* Statistics */
+	/* Statistics; not used now, but will be reintroduced for debugfs */
 	int msg_count;
 	int wcol_count;
 	int wcol_ticks;
@@ -79,7 +78,6 @@ struct mpc52xx_spi {
 	spinlock_t lock;
 	struct work_struct work;
 
-
 	/* Details of current transfer (length, and buffer pointers) */
 	struct spi_message *message;	/* current message */
 	struct spi_transfer *transfer;	/* current transfer */
@@ -89,6 +87,8 @@ struct mpc52xx_spi {
 	u8 *rx_buf;
 	const u8 *tx_buf;
 	int cs_change;
+	int gpio_cs_count;
+	unsigned int *gpio_cs;
 };
 
 /*
@@ -96,6 +96,12 @@ struct mpc52xx_spi {
  */
 static void mpc52xx_spi_chipsel(struct mpc52xx_spi *ms, int value)
 {
+	int cs;
+
+	if (ms->gpio_cs_count > 0) {
+		cs = ms->message->spi->chip_select;
+		gpio_set_value(ms->gpio_cs[cs], value ? 0 : 1);
+	} else
 		out_8(ms->regs + SPI_PORTDATA, value ? 0 : 0x08);
 }
 
@@ -221,7 +227,7 @@ static int mpc52xx_spi_fsmstate_transfer(int irq, struct mpc52xx_spi *ms,
 		ms->wcol_tx_timestamp = get_tbl();
 		data = 0;
 		if (ms->tx_buf)
-			data = *(ms->tx_buf-1);
+			data = *(ms->tx_buf - 1);
 		out_8(ms->regs + SPI_DATA, data); /* try again */
 		return FSM_CONTINUE;
 	} else if (status & SPI_STATUS_MODF) {
@@ -390,7 +396,9 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
 	struct spi_master *master;
 	struct mpc52xx_spi *ms;
 	void __iomem *regs;
-	int rc;
+	u8 ctrl1;
+	int rc, i = 0;
+	int gpio_cs;
 
 	/* MMIO registers */
 	dev_dbg(&op->dev, "probing mpc5200 SPI device\n");
@@ -399,7 +407,8 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
 		return -ENODEV;
 
 	/* initialize the device */
-	out_8(regs+SPI_CTRL1, SPI_CTRL1_SPIE | SPI_CTRL1_SPE | SPI_CTRL1_MSTR);
+	ctrl1 = SPI_CTRL1_SPIE | SPI_CTRL1_SPE | SPI_CTRL1_MSTR;
+	out_8(regs + SPI_CTRL1, ctrl1);
 	out_8(regs + SPI_CTRL2, 0x0);
 	out_8(regs + SPI_DATADIR, 0xe);	/* Set output pins */
 	out_8(regs + SPI_PORTDATA, 0x8);	/* Deassert /SS signal */
@@ -409,6 +418,8 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
 	 * on the SPI bus.  This fault will also occur if the SPI signals
 	 * are not connected to any pins (port_config setting) */
 	in_8(regs + SPI_STATUS);
+	out_8(regs + SPI_CTRL1, ctrl1);
+
 	in_8(regs + SPI_DATA);
 	if (in_8(regs + SPI_STATUS) & SPI_STATUS_MODF) {
 		dev_err(&op->dev, "mode fault; is port_config correct?\n");
@@ -422,10 +433,12 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
 		rc = -ENOMEM;
 		goto err_alloc;
 	}
+
 	master->bus_num = -1;
-	master->num_chipselect = 1;
 	master->setup = mpc52xx_spi_setup;
 	master->transfer = mpc52xx_spi_transfer;
+	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST;
+
 	dev_set_drvdata(&op->dev, master);
 
 	ms = spi_master_get_devdata(master);
@@ -435,16 +448,51 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
 	ms->irq1 = irq_of_parse_and_map(op->node, 1);
 	ms->state = mpc52xx_spi_fsmstate_idle;
 	ms->ipb_freq = mpc5xxx_get_bus_frequency(op->node);
+	ms->gpio_cs_count = of_gpio_count(op->node);
+	if (ms->gpio_cs_count > 0) {
+		master->num_chipselect = ms->gpio_cs_count;
+		ms->gpio_cs = kmalloc(ms->gpio_cs_count * sizeof(unsigned int),
+				GFP_KERNEL);
+		if (!ms->gpio_cs) {
+			rc = -ENOMEM;
+			goto err_alloc;
+		}
+
+		for (i = 0; i < ms->gpio_cs_count; i++) {
+			gpio_cs = of_get_gpio(op->node, i);
+			if (gpio_cs < 0) {
+				dev_err(&op->dev,
+					"could not parse the gpio field "
+					"in oftree\n");
+				rc = -ENODEV;
+				goto err_gpio;
+			}
+
+			rc = gpio_request(gpio_cs, dev_name(&op->dev));
+			if (rc) {
+				dev_err(&op->dev,
+					"can't request spi cs gpio #%d "
+					"on gpio line %d\n", i, gpio_cs);
+				goto err_gpio;
+			}
+
+			gpio_direction_output(gpio_cs, 1);
+			ms->gpio_cs[i] = gpio_cs;
+		}
+	} else {
+		master->num_chipselect = 1;
+	}
+
 	spin_lock_init(&ms->lock);
 	INIT_LIST_HEAD(&ms->queue);
 	INIT_WORK(&ms->work, mpc52xx_spi_wq);
 
 	/* Decide if interrupts can be used */
 	if (ms->irq0 && ms->irq1) {
-		rc = request_irq(ms->irq0, mpc52xx_spi_irq, IRQF_SAMPLE_RANDOM,
+		rc = request_irq(ms->irq0, mpc52xx_spi_irq, 0,
 				  "mpc5200-spi-modf", ms);
-		rc |= request_irq(ms->irq1, mpc52xx_spi_irq, IRQF_SAMPLE_RANDOM,
-				  "mpc5200-spi-spiF", ms);
+		rc |= request_irq(ms->irq1, mpc52xx_spi_irq, 0,
+				  "mpc5200-spi-spif", ms);
 		if (rc) {
 			free_irq(ms->irq0, ms);
 			free_irq(ms->irq1, ms);
@@ -471,6 +519,11 @@ static int __devinit mpc52xx_spi_probe(struct of_device *op,
  err_register:
 	dev_err(&ms->master->dev, "initialization failed\n");
 	spi_master_put(master);
+ err_gpio:
+	while (i-- > 0)
+		gpio_free(ms->gpio_cs[i]);
+
+	kfree(ms->gpio_cs);
  err_alloc:
  err_init:
 	iounmap(regs);
@@ -481,10 +534,15 @@ static int __devexit mpc52xx_spi_remove(struct of_device *op)
 {
 	struct spi_master *master = dev_get_drvdata(&op->dev);
 	struct mpc52xx_spi *ms = spi_master_get_devdata(master);
+	int i;
 
 	free_irq(ms->irq0, ms);
 	free_irq(ms->irq1, ms);
 
+	for (i = 0; i < ms->gpio_cs_count; i++)
+		gpio_free(ms->gpio_cs[i]);
+
+	kfree(ms->gpio_cs);
 	spi_unregister_master(master);
 	spi_master_put(master);
 	iounmap(ms->regs);

drivers/spi/spi_imx.c

@@ -44,6 +44,9 @@
 #define MXC_CSPIINT		0x0c
 #define MXC_RESET		0x1c
 
+#define MX3_CSPISTAT		0x14
+#define MX3_CSPISTAT_RR		(1 << 3)
+
 /* generic defines to abstract from the different register layouts */
 #define MXC_INT_RR	(1 << 0) /* Receive data ready interrupt */
 #define MXC_INT_TE	(1 << 1) /* Transmit FIFO empty interrupt */
@@ -205,7 +208,7 @@ static int mx31_config(struct spi_imx_data *spi_imx,
 
 	if (cpu_is_mx31())
 		reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;
-	else if (cpu_is_mx35()) {
+	else if (cpu_is_mx25() || cpu_is_mx35()) {
 		reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
 		reg |= MX31_CSPICTRL_SSCTL;
 	}
@@ -219,7 +222,7 @@ static int mx31_config(struct spi_imx_data *spi_imx,
 	if (config->cs < 0) {
 		if (cpu_is_mx31())
 			reg |= (config->cs + 32) << MX31_CSPICTRL_CS_SHIFT;
-		else if (cpu_is_mx35())
+		else if (cpu_is_mx25() || cpu_is_mx35())
 			reg |= (config->cs + 32) << MX35_CSPICTRL_CS_SHIFT;
 	}
 
@@ -481,7 +484,7 @@ static void spi_imx_cleanup(struct spi_device *spi)
 {
 }
 
-static int __init spi_imx_probe(struct platform_device *pdev)
+static int __devinit spi_imx_probe(struct platform_device *pdev)
 {
 	struct spi_imx_master *mxc_platform_info;
 	struct spi_master *master;
@@ -489,7 +492,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
 	struct resource *res;
 	int i, ret;
 
-	mxc_platform_info = (struct spi_imx_master *)pdev->dev.platform_data;
+	mxc_platform_info = dev_get_platdata(&pdev->dev);
 	if (!mxc_platform_info) {
 		dev_err(&pdev->dev, "can't get the platform data\n");
 		return -EINVAL;
@@ -513,11 +516,12 @@ static int __init spi_imx_probe(struct platform_device *pdev)
 			continue;
 		ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME);
 		if (ret) {
+			while (i > 0) {
 				i--;
-			while (i > 0)
 				if (spi_imx->chipselect[i] >= 0)
-					gpio_free(spi_imx->chipselect[i--]);
-			dev_err(&pdev->dev, "can't get cs gpios");
+					gpio_free(spi_imx->chipselect[i]);
+			}
+			dev_err(&pdev->dev, "can't get cs gpios\n");
 			goto out_master_put;
 		}
 	}
@@ -551,7 +555,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
 	}
 
 	spi_imx->irq = platform_get_irq(pdev, 0);
-	if (!spi_imx->irq) {
+	if (spi_imx->irq <= 0) {
 		ret = -EINVAL;
 		goto out_iounmap;
 	}
@@ -562,7 +566,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
 		goto out_iounmap;
 	}
 
-	if (cpu_is_mx31() || cpu_is_mx35()) {
+	if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35()) {
 		spi_imx->intctrl = mx31_intctrl;
 		spi_imx->config = mx31_config;
 		spi_imx->trigger = mx31_trigger;
@@ -590,9 +594,14 @@ static int __init spi_imx_probe(struct platform_device *pdev)
 	clk_enable(spi_imx->clk);
 	spi_imx->spi_clk = clk_get_rate(spi_imx->clk);
 
-	if (!cpu_is_mx31() || !cpu_is_mx35())
+	if (cpu_is_mx1() || cpu_is_mx21() || cpu_is_mx27())
 		writel(1, spi_imx->base + MXC_RESET);
 
+	/* drain receive buffer */
+	if (cpu_is_mx25() || cpu_is_mx31() || cpu_is_mx35())
+		while (readl(spi_imx->base + MX3_CSPISTAT) & MX3_CSPISTAT_RR)
+			readl(spi_imx->base + MXC_CSPIRXDATA);
+
 	spi_imx->intctrl(spi_imx, 0);
 
 	ret = spi_bitbang_start(&spi_imx->bitbang);
@@ -625,7 +634,7 @@ static int __init spi_imx_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int __exit spi_imx_remove(struct platform_device *pdev)
+static int __devexit spi_imx_remove(struct platform_device *pdev)
 {
 	struct spi_master *master = platform_get_drvdata(pdev);
 	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -659,7 +668,7 @@ static struct platform_driver spi_imx_driver = {
 		   .owner = THIS_MODULE,
 		   },
 	.probe = spi_imx_probe,
-	.remove = __exit_p(spi_imx_remove),
+	.remove = __devexit_p(spi_imx_remove),
 };
 
 static int __init spi_imx_init(void)

drivers/spi/spi_mpc8xxx.c

@@ -1356,7 +1356,7 @@ static int __devexit plat_mpc8xxx_spi_remove(struct platform_device *pdev)
 MODULE_ALIAS("platform:mpc8xxx_spi");
 static struct platform_driver mpc8xxx_spi_driver = {
 	.probe = plat_mpc8xxx_spi_probe,
-	.remove = __exit_p(plat_mpc8xxx_spi_remove),
+	.remove = __devexit_p(plat_mpc8xxx_spi_remove),
 	.driver = {
 		.name = "mpc8xxx_spi",
 		.owner = THIS_MODULE,

drivers/spi/spidev.c

@@ -266,15 +266,15 @@ static int spidev_message(struct spidev_data *spidev,
 		k_tmp->delay_usecs = u_tmp->delay_usecs;
 		k_tmp->speed_hz = u_tmp->speed_hz;
 #ifdef VERBOSE
-		dev_dbg(&spi->dev,
+		dev_dbg(&spidev->spi->dev,
 			"  xfer len %zd %s%s%s%dbits %u usec %uHz\n",
 			u_tmp->len,
 			u_tmp->rx_buf ? "rx " : "",
 			u_tmp->tx_buf ? "tx " : "",
 			u_tmp->cs_change ? "cs " : "",
-			u_tmp->bits_per_word ? : spi->bits_per_word,
+			u_tmp->bits_per_word ? : spidev->spi->bits_per_word,
 			u_tmp->delay_usecs,
-			u_tmp->speed_hz ? : spi->max_speed_hz);
+			u_tmp->speed_hz ? : spidev->spi->max_speed_hz);
 #endif
 		spi_message_add_tail(k_tmp, &msg);
 	}

drivers/spi/xilinx_spi.h

+/*
+ * Xilinx SPI device driver API and platform data header file
+ *
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _XILINX_SPI_H_
+#define _XILINX_SPI_H_
+
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+
+#define XILINX_SPI_NAME "xilinx_spi"
+
+struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
+	u32 irq, s16 bus_num);
+
+void xilinx_spi_deinit(struct spi_master *master);
+#endif

drivers/spi/xilinx_spi_of.c

+/*
+ * Xilinx SPI OF device driver
+ *
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supports:
+ * Xilinx SPI devices as OF devices
+ *
+ * Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include <linux/of_platform.h>
+#include <linux/of_device.h>
+#include <linux/of_spi.h>
+
+#include <linux/spi/xilinx_spi.h>
+#include "xilinx_spi.h"
+
+
+static int __devinit xilinx_spi_of_probe(struct of_device *ofdev,
+	const struct of_device_id *match)
+{
+	struct spi_master *master;
+	struct xspi_platform_data *pdata;
+	struct resource r_mem;
+	struct resource r_irq;
+	int rc = 0;
+	const u32 *prop;
+	int len;
+
+	rc = of_address_to_resource(ofdev->node, 0, &r_mem);
+	if (rc) {
+		dev_warn(&ofdev->dev, "invalid address\n");
+		return rc;
+	}
+
+	rc = of_irq_to_resource(ofdev->node, 0, &r_irq);
+	if (rc == NO_IRQ) {
+		dev_warn(&ofdev->dev, "no IRQ found\n");
+		return -ENODEV;
+	}
+
+	ofdev->dev.platform_data =
+		kzalloc(sizeof(struct xspi_platform_data), GFP_KERNEL);
+	pdata = ofdev->dev.platform_data;
+	if (!pdata)
+		return -ENOMEM;
+
+	/* number of slave select bits is required */
+	prop = of_get_property(ofdev->node, "xlnx,num-ss-bits", &len);
+	if (!prop || len < sizeof(*prop)) {
+		dev_warn(&ofdev->dev, "no 'xlnx,num-ss-bits' property\n");
+		return -EINVAL;
+	}
+	pdata->num_chipselect = *prop;
+	pdata->bits_per_word = 8;
+	master = xilinx_spi_init(&ofdev->dev, &r_mem, r_irq.start, -1);
+	if (!master)
+		return -ENODEV;
+
+	dev_set_drvdata(&ofdev->dev, master);
+
+	/* Add any subnodes on the SPI bus */
+	of_register_spi_devices(master, ofdev->node);
+
+	return 0;
+}
+
+static int __devexit xilinx_spi_remove(struct of_device *ofdev)
+{
+	xilinx_spi_deinit(dev_get_drvdata(&ofdev->dev));
+	dev_set_drvdata(&ofdev->dev, 0);
+	kfree(ofdev->dev.platform_data);
+	ofdev->dev.platform_data = NULL;
+	return 0;
+}
+
+static int __exit xilinx_spi_of_remove(struct of_device *op)
+{
+	return xilinx_spi_remove(op);
+}
+
+static struct of_device_id xilinx_spi_of_match[] = {
+	{ .compatible = "xlnx,xps-spi-2.00.a", },
+	{ .compatible = "xlnx,xps-spi-2.00.b", },
+	{}
+};
+
+MODULE_DEVICE_TABLE(of, xilinx_spi_of_match);
+
+static struct of_platform_driver xilinx_spi_of_driver = {
+	.match_table = xilinx_spi_of_match,
+	.probe = xilinx_spi_of_probe,
+	.remove = __exit_p(xilinx_spi_of_remove),
+	.driver = {
+		.name = "xilinx-xps-spi",
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init xilinx_spi_of_init(void)
+{
+	return of_register_platform_driver(&xilinx_spi_of_driver);
+}
+module_init(xilinx_spi_of_init);
+
+static void __exit xilinx_spi_of_exit(void)
+{
+	of_unregister_platform_driver(&xilinx_spi_of_driver);
+}
+module_exit(xilinx_spi_of_exit);
+
+MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
+MODULE_DESCRIPTION("Xilinx SPI platform driver");
+MODULE_LICENSE("GPL v2");

drivers/spi/xilinx_spi_pltfm.c

+/*
+ * Support for Xilinx SPI platform devices
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* Supports:
+ * Xilinx SPI devices as platform devices
+ *
+ * Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+#include <linux/spi/xilinx_spi.h>
+
+#include "xilinx_spi.h"
+
+static int __devinit xilinx_spi_probe(struct platform_device *dev)
+{
+	struct xspi_platform_data *pdata;
+	struct resource *r;
+	int irq;
+	struct spi_master *master;
+	u8 i;
+
+	pdata = dev->dev.platform_data;
+	if (!pdata)
+		return -ENODEV;
+
+	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);
+	if (!master)
+		return -ENODEV;
+
+	for (i = 0; i < pdata->num_devices; i++)
+		spi_new_device(master, pdata->devices + i);
+
+	platform_set_drvdata(dev, master);
+	return 0;
+}
+
+static int __devexit xilinx_spi_remove(struct platform_device *dev)
+{
+	xilinx_spi_deinit(platform_get_drvdata(dev));
+	platform_set_drvdata(dev, 0);
+
+	return 0;
+}
+
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:" XILINX_SPI_NAME);
+
+static struct platform_driver xilinx_spi_driver = {
+	.probe	= xilinx_spi_probe,
+	.remove	= __devexit_p(xilinx_spi_remove),
+	.driver = {
+		.name = XILINX_SPI_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init xilinx_spi_pltfm_init(void)
+{
+	return platform_driver_register(&xilinx_spi_driver);
+}
+module_init(xilinx_spi_pltfm_init);
+
+static void __exit xilinx_spi_pltfm_exit(void)
+{
+	platform_driver_unregister(&xilinx_spi_driver);
+}
+module_exit(xilinx_spi_pltfm_exit);
+
+MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
+MODULE_DESCRIPTION("Xilinx SPI platform driver");
+MODULE_LICENSE("GPL v2");

include/linux/spi/mpc52xx_spi.h

-
-#ifndef INCLUDE_MPC5200_SPI_H
-#define INCLUDE_MPC5200_SPI_H
-
-extern void mpc52xx_spi_set_premessage_hook(struct spi_master *master,
-					    void (*hook)(struct spi_message *m,
-							 void *context),
-					    void *hook_context);
-
-#endif

include/linux/spi/sh_msiof.h

+#ifndef __SPI_SH_MSIOF_H__
+#define __SPI_SH_MSIOF_H__
+
+struct sh_msiof_spi_info {
+	int tx_fifo_override;
+	int rx_fifo_override;
+	u16 num_chipselect;
+};
+
+#endif /* __SPI_SH_MSIOF_H__ */

include/linux/spi/xilinx_spi.h

+#ifndef __LINUX_SPI_XILINX_SPI_H
+#define __LINUX_SPI_XILINX_SPI_H
+
+/**
+ * struct xspi_platform_data - Platform data of the Xilinx SPI driver
+ * @num_chipselect:	Number of chip select by the IP.
+ * @little_endian:	If registers should be accessed little endian or not.
+ * @bits_per_word:	Number of bits per word.
+ * @devices:		Devices to add when the driver is probed.
+ * @num_devices:	Number of devices in the devices array.
+ */
+struct xspi_platform_data {
+	u16 num_chipselect;
+	bool little_endian;
+	u8 bits_per_word;
+	struct spi_board_info *devices;
+	u8 num_devices;
+};
+
+#endif /* __LINUX_SPI_XILINX_SPI_H */