spi: reorganize drivers

Sort the SPI makefile and enforce the naming convention spi_*.c for
spi drivers.

This change also rolls the contents of atmel_spi.h into the .c file
since there is only one user of that particular include file.

v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be
      be the predominant pattern for subsystem prefixes.
    - Clean up filenames in Kconfig and header comment blocks

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 0 insertions, 944 deletions

diff --git a/drivers/spi/spi_imx.c b/drivers/spi/spi_imx.c
deleted file mode 100644
index 69d6dba67c1..00000000000
--- a/drivers/spi/spi_imx.c
+++ /dev/null
@@ -1,944 +0,0 @@
-/*
- * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright (C) 2008 Juergen Beisert
- *
- * 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; either version 2
- * of the License, or (at your option) any later version.
- * 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
- * 51 Franklin Street, Fifth Floor
- * Boston, MA  02110-1301, USA.
- */
-
-#include <linux/clk.h>
-#include <linux/completion.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/spi/spi.h>
-#include <linux/spi/spi_bitbang.h>
-#include <linux/types.h>
-
-#include <mach/spi.h>
-
-#define DRIVER_NAME "spi_imx"
-
-#define MXC_CSPIRXDATA		0x00
-#define MXC_CSPITXDATA		0x04
-#define MXC_CSPICTRL		0x08
-#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 */
-
-struct spi_imx_config {
-	unsigned int speed_hz;
-	unsigned int bpw;
-	unsigned int mode;
-	u8 cs;
-};
-
-enum spi_imx_devtype {
-	SPI_IMX_VER_IMX1,
-	SPI_IMX_VER_0_0,
-	SPI_IMX_VER_0_4,
-	SPI_IMX_VER_0_5,
-	SPI_IMX_VER_0_7,
-	SPI_IMX_VER_2_3,
-};
-
-struct spi_imx_data;
-
-struct spi_imx_devtype_data {
-	void (*intctrl)(struct spi_imx_data *, int);
-	int (*config)(struct spi_imx_data *, struct spi_imx_config *);
-	void (*trigger)(struct spi_imx_data *);
-	int (*rx_available)(struct spi_imx_data *);
-	void (*reset)(struct spi_imx_data *);
-	unsigned int fifosize;
-};
-
-struct spi_imx_data {
-	struct spi_bitbang bitbang;
-
-	struct completion xfer_done;
-	void *base;
-	int irq;
-	struct clk *clk;
-	unsigned long spi_clk;
-	int *chipselect;
-
-	unsigned int count;
-	void (*tx)(struct spi_imx_data *);
-	void (*rx)(struct spi_imx_data *);
-	void *rx_buf;
-	const void *tx_buf;
-	unsigned int txfifo; /* number of words pushed in tx FIFO */
-
-	struct spi_imx_devtype_data devtype_data;
-};
-
-#define MXC_SPI_BUF_RX(type)						\
-static void spi_imx_buf_rx_##type(struct spi_imx_data *spi_imx)		\
-{									\
-	unsigned int val = readl(spi_imx->base + MXC_CSPIRXDATA);	\
-									\
-	if (spi_imx->rx_buf) {						\
-		*(type *)spi_imx->rx_buf = val;				\
-		spi_imx->rx_buf += sizeof(type);			\
-	}								\
-}
-
-#define MXC_SPI_BUF_TX(type)						\
-static void spi_imx_buf_tx_##type(struct spi_imx_data *spi_imx)		\
-{									\
-	type val = 0;							\
-									\
-	if (spi_imx->tx_buf) {						\
-		val = *(type *)spi_imx->tx_buf;				\
-		spi_imx->tx_buf += sizeof(type);			\
-	}								\
-									\
-	spi_imx->count -= sizeof(type);					\
-									\
-	writel(val, spi_imx->base + MXC_CSPITXDATA);			\
-}
-
-MXC_SPI_BUF_RX(u8)
-MXC_SPI_BUF_TX(u8)
-MXC_SPI_BUF_RX(u16)
-MXC_SPI_BUF_TX(u16)
-MXC_SPI_BUF_RX(u32)
-MXC_SPI_BUF_TX(u32)
-
-/* First entry is reserved, second entry is valid only if SDHC_SPIEN is set
- * (which is currently not the case in this driver)
- */
-static int mxc_clkdivs[] = {0, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192,
-	256, 384, 512, 768, 1024};
-
-/* MX21, MX27 */
-static unsigned int spi_imx_clkdiv_1(unsigned int fin,
-		unsigned int fspi)
-{
-	int i, max;
-
-	if (cpu_is_mx21())
-		max = 18;
-	else
-		max = 16;
-
-	for (i = 2; i < max; i++)
-		if (fspi * mxc_clkdivs[i] >= fin)
-			return i;
-
-	return max;
-}
-
-/* MX1, MX31, MX35, MX51 CSPI */
-static unsigned int spi_imx_clkdiv_2(unsigned int fin,
-		unsigned int fspi)
-{
-	int i, div = 4;
-
-	for (i = 0; i < 7; i++) {
-		if (fspi * div >= fin)
-			return i;
-		div <<= 1;
-	}
-
-	return 7;
-}
-
-#define SPI_IMX2_3_CTRL		0x08
-#define SPI_IMX2_3_CTRL_ENABLE		(1 <<  0)
-#define SPI_IMX2_3_CTRL_XCH		(1 <<  2)
-#define SPI_IMX2_3_CTRL_MODE_MASK	(0xf << 4)
-#define SPI_IMX2_3_CTRL_POSTDIV_OFFSET	8
-#define SPI_IMX2_3_CTRL_PREDIV_OFFSET	12
-#define SPI_IMX2_3_CTRL_CS(cs)		((cs) << 18)
-#define SPI_IMX2_3_CTRL_BL_OFFSET	20
-
-#define SPI_IMX2_3_CONFIG	0x0c
-#define SPI_IMX2_3_CONFIG_SCLKPHA(cs)	(1 << ((cs) +  0))
-#define SPI_IMX2_3_CONFIG_SCLKPOL(cs)	(1 << ((cs) +  4))
-#define SPI_IMX2_3_CONFIG_SBBCTRL(cs)	(1 << ((cs) +  8))
-#define SPI_IMX2_3_CONFIG_SSBPOL(cs)	(1 << ((cs) + 12))
-
-#define SPI_IMX2_3_INT		0x10
-#define SPI_IMX2_3_INT_TEEN		(1 <<  0)
-#define SPI_IMX2_3_INT_RREN		(1 <<  3)
-
-#define SPI_IMX2_3_STAT		0x18
-#define SPI_IMX2_3_STAT_RR		(1 <<  3)
-
-/* MX51 eCSPI */
-static unsigned int spi_imx2_3_clkdiv(unsigned int fin, unsigned int fspi)
-{
-	/*
-	 * there are two 4-bit dividers, the pre-divider divides by
-	 * $pre, the post-divider by 2^$post
-	 */
-	unsigned int pre, post;
-
-	if (unlikely(fspi > fin))
-		return 0;
-
-	post = fls(fin) - fls(fspi);
-	if (fin > fspi << post)
-		post++;
-
-	/* now we have: (fin <= fspi << post) with post being minimal */
-
-	post = max(4U, post) - 4;
-	if (unlikely(post > 0xf)) {
-		pr_err("%s: cannot set clock freq: %u (base freq: %u)\n",
-				__func__, fspi, fin);
-		return 0xff;
-	}
-
-	pre = DIV_ROUND_UP(fin, fspi << post) - 1;
-
-	pr_debug("%s: fin: %u, fspi: %u, post: %u, pre: %u\n",
-			__func__, fin, fspi, post, pre);
-	return (pre << SPI_IMX2_3_CTRL_PREDIV_OFFSET) |
-		(post << SPI_IMX2_3_CTRL_POSTDIV_OFFSET);
-}
-
-static void __maybe_unused spi_imx2_3_intctrl(struct spi_imx_data *spi_imx, int enable)
-{
-	unsigned val = 0;
-
-	if (enable & MXC_INT_TE)
-		val |= SPI_IMX2_3_INT_TEEN;
-
-	if (enable & MXC_INT_RR)
-		val |= SPI_IMX2_3_INT_RREN;
-
-	writel(val, spi_imx->base + SPI_IMX2_3_INT);
-}
-
-static void __maybe_unused spi_imx2_3_trigger(struct spi_imx_data *spi_imx)
-{
-	u32 reg;
-
-	reg = readl(spi_imx->base + SPI_IMX2_3_CTRL);
-	reg |= SPI_IMX2_3_CTRL_XCH;
-	writel(reg, spi_imx->base + SPI_IMX2_3_CTRL);
-}
-
-static int __maybe_unused spi_imx2_3_config(struct spi_imx_data *spi_imx,
-		struct spi_imx_config *config)
-{
-	u32 ctrl = SPI_IMX2_3_CTRL_ENABLE, cfg = 0;
-
-	/*
-	 * The hardware seems to have a race condition when changing modes. The
-	 * current assumption is that the selection of the channel arrives
-	 * earlier in the hardware than the mode bits when they are written at
-	 * the same time.
-	 * So set master mode for all channels as we do not support slave mode.
-	 */
-	ctrl |= SPI_IMX2_3_CTRL_MODE_MASK;
-
-	/* set clock speed */
-	ctrl |= spi_imx2_3_clkdiv(spi_imx->spi_clk, config->speed_hz);
-
-	/* set chip select to use */
-	ctrl |= SPI_IMX2_3_CTRL_CS(config->cs);
-
-	ctrl |= (config->bpw - 1) << SPI_IMX2_3_CTRL_BL_OFFSET;
-
-	cfg |= SPI_IMX2_3_CONFIG_SBBCTRL(config->cs);
-
-	if (config->mode & SPI_CPHA)
-		cfg |= SPI_IMX2_3_CONFIG_SCLKPHA(config->cs);
-
-	if (config->mode & SPI_CPOL)
-		cfg |= SPI_IMX2_3_CONFIG_SCLKPOL(config->cs);
-
-	if (config->mode & SPI_CS_HIGH)
-		cfg |= SPI_IMX2_3_CONFIG_SSBPOL(config->cs);
-
-	writel(ctrl, spi_imx->base + SPI_IMX2_3_CTRL);
-	writel(cfg, spi_imx->base + SPI_IMX2_3_CONFIG);
-
-	return 0;
-}
-
-static int __maybe_unused spi_imx2_3_rx_available(struct spi_imx_data *spi_imx)
-{
-	return readl(spi_imx->base + SPI_IMX2_3_STAT) & SPI_IMX2_3_STAT_RR;
-}
-
-static void __maybe_unused spi_imx2_3_reset(struct spi_imx_data *spi_imx)
-{
-	/* drain receive buffer */
-	while (spi_imx2_3_rx_available(spi_imx))
-		readl(spi_imx->base + MXC_CSPIRXDATA);
-}
-
-#define MX31_INTREG_TEEN	(1 << 0)
-#define MX31_INTREG_RREN	(1 << 3)
-
-#define MX31_CSPICTRL_ENABLE	(1 << 0)
-#define MX31_CSPICTRL_MASTER	(1 << 1)
-#define MX31_CSPICTRL_XCH	(1 << 2)
-#define MX31_CSPICTRL_POL	(1 << 4)
-#define MX31_CSPICTRL_PHA	(1 << 5)
-#define MX31_CSPICTRL_SSCTL	(1 << 6)
-#define MX31_CSPICTRL_SSPOL	(1 << 7)
-#define MX31_CSPICTRL_BC_SHIFT	8
-#define MX35_CSPICTRL_BL_SHIFT	20
-#define MX31_CSPICTRL_CS_SHIFT	24
-#define MX35_CSPICTRL_CS_SHIFT	12
-#define MX31_CSPICTRL_DR_SHIFT	16
-
-#define MX31_CSPISTATUS		0x14
-#define MX31_STATUS_RR		(1 << 3)
-
-/* These functions also work for the i.MX35, but be aware that
- * the i.MX35 has a slightly different register layout for bits
- * we do not use here.
- */
-static void __maybe_unused mx31_intctrl(struct spi_imx_data *spi_imx, int enable)
-{
-	unsigned int val = 0;
-
-	if (enable & MXC_INT_TE)
-		val |= MX31_INTREG_TEEN;
-	if (enable & MXC_INT_RR)
-		val |= MX31_INTREG_RREN;
-
-	writel(val, spi_imx->base + MXC_CSPIINT);
-}
-
-static void __maybe_unused mx31_trigger(struct spi_imx_data *spi_imx)
-{
-	unsigned int reg;
-
-	reg = readl(spi_imx->base + MXC_CSPICTRL);
-	reg |= MX31_CSPICTRL_XCH;
-	writel(reg, spi_imx->base + MXC_CSPICTRL);
-}
-
-static int __maybe_unused spi_imx0_4_config(struct spi_imx_data *spi_imx,
-		struct spi_imx_config *config)
-{
-	unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
-	int cs = spi_imx->chipselect[config->cs];
-
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) <<
-		MX31_CSPICTRL_DR_SHIFT;
-
-	reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;
-
-	if (config->mode & SPI_CPHA)
-		reg |= MX31_CSPICTRL_PHA;
-	if (config->mode & SPI_CPOL)
-		reg |= MX31_CSPICTRL_POL;
-	if (config->mode & SPI_CS_HIGH)
-		reg |= MX31_CSPICTRL_SSPOL;
-	if (cs < 0)
-		reg |= (cs + 32) << MX31_CSPICTRL_CS_SHIFT;
-
-	writel(reg, spi_imx->base + MXC_CSPICTRL);
-
-	return 0;
-}
-
-static int __maybe_unused spi_imx0_7_config(struct spi_imx_data *spi_imx,
-		struct spi_imx_config *config)
-{
-	unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
-	int cs = spi_imx->chipselect[config->cs];
-
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) <<
-		MX31_CSPICTRL_DR_SHIFT;
-
-	reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
-	reg |= MX31_CSPICTRL_SSCTL;
-
-	if (config->mode & SPI_CPHA)
-		reg |= MX31_CSPICTRL_PHA;
-	if (config->mode & SPI_CPOL)
-		reg |= MX31_CSPICTRL_POL;
-	if (config->mode & SPI_CS_HIGH)
-		reg |= MX31_CSPICTRL_SSPOL;
-	if (cs < 0)
-		reg |= (cs + 32) << MX35_CSPICTRL_CS_SHIFT;
-
-	writel(reg, spi_imx->base + MXC_CSPICTRL);
-
-	return 0;
-}
-
-static int __maybe_unused mx31_rx_available(struct spi_imx_data *spi_imx)
-{
-	return readl(spi_imx->base + MX31_CSPISTATUS) & MX31_STATUS_RR;
-}
-
-static void __maybe_unused spi_imx0_4_reset(struct spi_imx_data *spi_imx)
-{
-	/* drain receive buffer */
-	while (readl(spi_imx->base + MX3_CSPISTAT) & MX3_CSPISTAT_RR)
-		readl(spi_imx->base + MXC_CSPIRXDATA);
-}
-
-#define MX27_INTREG_RR		(1 << 4)
-#define MX27_INTREG_TEEN	(1 << 9)
-#define MX27_INTREG_RREN	(1 << 13)
-
-#define MX27_CSPICTRL_POL	(1 << 5)
-#define MX27_CSPICTRL_PHA	(1 << 6)
-#define MX27_CSPICTRL_SSPOL	(1 << 8)
-#define MX27_CSPICTRL_XCH	(1 << 9)
-#define MX27_CSPICTRL_ENABLE	(1 << 10)
-#define MX27_CSPICTRL_MASTER	(1 << 11)
-#define MX27_CSPICTRL_DR_SHIFT	14
-#define MX27_CSPICTRL_CS_SHIFT	19
-
-static void __maybe_unused mx27_intctrl(struct spi_imx_data *spi_imx, int enable)
-{
-	unsigned int val = 0;
-
-	if (enable & MXC_INT_TE)
-		val |= MX27_INTREG_TEEN;
-	if (enable & MXC_INT_RR)
-		val |= MX27_INTREG_RREN;
-
-	writel(val, spi_imx->base + MXC_CSPIINT);
-}
-
-static void __maybe_unused mx27_trigger(struct spi_imx_data *spi_imx)
-{
-	unsigned int reg;
-
-	reg = readl(spi_imx->base + MXC_CSPICTRL);
-	reg |= MX27_CSPICTRL_XCH;
-	writel(reg, spi_imx->base + MXC_CSPICTRL);
-}
-
-static int __maybe_unused mx27_config(struct spi_imx_data *spi_imx,
-		struct spi_imx_config *config)
-{
-	unsigned int reg = MX27_CSPICTRL_ENABLE | MX27_CSPICTRL_MASTER;
-	int cs = spi_imx->chipselect[config->cs];
-
-	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz) <<
-		MX27_CSPICTRL_DR_SHIFT;
-	reg |= config->bpw - 1;
-
-	if (config->mode & SPI_CPHA)
-		reg |= MX27_CSPICTRL_PHA;
-	if (config->mode & SPI_CPOL)
-		reg |= MX27_CSPICTRL_POL;
-	if (config->mode & SPI_CS_HIGH)
-		reg |= MX27_CSPICTRL_SSPOL;
-	if (cs < 0)
-		reg |= (cs + 32) << MX27_CSPICTRL_CS_SHIFT;
-
-	writel(reg, spi_imx->base + MXC_CSPICTRL);
-
-	return 0;
-}
-
-static int __maybe_unused mx27_rx_available(struct spi_imx_data *spi_imx)
-{
-	return readl(spi_imx->base + MXC_CSPIINT) & MX27_INTREG_RR;
-}
-
-static void __maybe_unused spi_imx0_0_reset(struct spi_imx_data *spi_imx)
-{
-	writel(1, spi_imx->base + MXC_RESET);
-}
-
-#define MX1_INTREG_RR		(1 << 3)
-#define MX1_INTREG_TEEN		(1 << 8)
-#define MX1_INTREG_RREN		(1 << 11)
-
-#define MX1_CSPICTRL_POL	(1 << 4)
-#define MX1_CSPICTRL_PHA	(1 << 5)
-#define MX1_CSPICTRL_XCH	(1 << 8)
-#define MX1_CSPICTRL_ENABLE	(1 << 9)
-#define MX1_CSPICTRL_MASTER	(1 << 10)
-#define MX1_CSPICTRL_DR_SHIFT	13
-
-static void __maybe_unused mx1_intctrl(struct spi_imx_data *spi_imx, int enable)
-{
-	unsigned int val = 0;
-
-	if (enable & MXC_INT_TE)
-		val |= MX1_INTREG_TEEN;
-	if (enable & MXC_INT_RR)
-		val |= MX1_INTREG_RREN;
-
-	writel(val, spi_imx->base + MXC_CSPIINT);
-}
-
-static void __maybe_unused mx1_trigger(struct spi_imx_data *spi_imx)
-{
-	unsigned int reg;
-
-	reg = readl(spi_imx->base + MXC_CSPICTRL);
-	reg |= MX1_CSPICTRL_XCH;
-	writel(reg, spi_imx->base + MXC_CSPICTRL);
-}
-
-static int __maybe_unused mx1_config(struct spi_imx_data *spi_imx,
-		struct spi_imx_config *config)
-{
-	unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER;
-
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz) <<
-		MX1_CSPICTRL_DR_SHIFT;
-	reg |= config->bpw - 1;
-
-	if (config->mode & SPI_CPHA)
-		reg |= MX1_CSPICTRL_PHA;
-	if (config->mode & SPI_CPOL)
-		reg |= MX1_CSPICTRL_POL;
-
-	writel(reg, spi_imx->base + MXC_CSPICTRL);
-
-	return 0;
-}
-
-static int __maybe_unused mx1_rx_available(struct spi_imx_data *spi_imx)
-{
-	return readl(spi_imx->base + MXC_CSPIINT) & MX1_INTREG_RR;
-}
-
-static void __maybe_unused mx1_reset(struct spi_imx_data *spi_imx)
-{
-	writel(1, spi_imx->base + MXC_RESET);
-}
-
-/*
- * These version numbers are taken from the Freescale driver.  Unfortunately it
- * doesn't support i.MX1, so this entry doesn't match the scheme. :-(
- */
-static struct spi_imx_devtype_data spi_imx_devtype_data[] __devinitdata = {
-#ifdef CONFIG_SPI_IMX_VER_IMX1
-	[SPI_IMX_VER_IMX1] = {
-		.intctrl = mx1_intctrl,
-		.config = mx1_config,
-		.trigger = mx1_trigger,
-		.rx_available = mx1_rx_available,
-		.reset = mx1_reset,
-		.fifosize = 8,
-	},
-#endif
-#ifdef CONFIG_SPI_IMX_VER_0_0
-	[SPI_IMX_VER_0_0] = {
-		.intctrl = mx27_intctrl,
-		.config = mx27_config,
-		.trigger = mx27_trigger,
-		.rx_available = mx27_rx_available,
-		.reset = spi_imx0_0_reset,
-		.fifosize = 8,
-	},
-#endif
-#ifdef CONFIG_SPI_IMX_VER_0_4
-	[SPI_IMX_VER_0_4] = {
-		.intctrl = mx31_intctrl,
-		.config = spi_imx0_4_config,
-		.trigger = mx31_trigger,
-		.rx_available = mx31_rx_available,
-		.reset = spi_imx0_4_reset,
-		.fifosize = 8,
-	},
-#endif
-#ifdef CONFIG_SPI_IMX_VER_0_7
-	[SPI_IMX_VER_0_7] = {
-		.intctrl = mx31_intctrl,
-		.config = spi_imx0_7_config,
-		.trigger = mx31_trigger,
-		.rx_available = mx31_rx_available,
-		.reset = spi_imx0_4_reset,
-		.fifosize = 8,
-	},
-#endif
-#ifdef CONFIG_SPI_IMX_VER_2_3
-	[SPI_IMX_VER_2_3] = {
-		.intctrl = spi_imx2_3_intctrl,
-		.config = spi_imx2_3_config,
-		.trigger = spi_imx2_3_trigger,
-		.rx_available = spi_imx2_3_rx_available,
-		.reset = spi_imx2_3_reset,
-		.fifosize = 64,
-	},
-#endif
-};
-
-static void spi_imx_chipselect(struct spi_device *spi, int is_active)
-{
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
-	int gpio = spi_imx->chipselect[spi->chip_select];
-	int active = is_active != BITBANG_CS_INACTIVE;
-	int dev_is_lowactive = !(spi->mode & SPI_CS_HIGH);
-
-	if (gpio < 0)
-		return;
-
-	gpio_set_value(gpio, dev_is_lowactive ^ active);
-}
-
-static void spi_imx_push(struct spi_imx_data *spi_imx)
-{
-	while (spi_imx->txfifo < spi_imx->devtype_data.fifosize) {
-		if (!spi_imx->count)
-			break;
-		spi_imx->tx(spi_imx);
-		spi_imx->txfifo++;
-	}
-
-	spi_imx->devtype_data.trigger(spi_imx);
-}
-
-static irqreturn_t spi_imx_isr(int irq, void *dev_id)
-{
-	struct spi_imx_data *spi_imx = dev_id;
-
-	while (spi_imx->devtype_data.rx_available(spi_imx)) {
-		spi_imx->rx(spi_imx);
-		spi_imx->txfifo--;
-	}
-
-	if (spi_imx->count) {
-		spi_imx_push(spi_imx);
-		return IRQ_HANDLED;
-	}
-
-	if (spi_imx->txfifo) {
-		/* No data left to push, but still waiting for rx data,
-		 * enable receive data available interrupt.
-		 */
-		spi_imx->devtype_data.intctrl(
-				spi_imx, MXC_INT_RR);
-		return IRQ_HANDLED;
-	}
-
-	spi_imx->devtype_data.intctrl(spi_imx, 0);
-	complete(&spi_imx->xfer_done);
-
-	return IRQ_HANDLED;
-}
-
-static int spi_imx_setupxfer(struct spi_device *spi,
-				 struct spi_transfer *t)
-{
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
-	struct spi_imx_config config;
-
-	config.bpw = t ? t->bits_per_word : spi->bits_per_word;
-	config.speed_hz  = t ? t->speed_hz : spi->max_speed_hz;
-	config.mode = spi->mode;
-	config.cs = spi->chip_select;
-
-	if (!config.speed_hz)
-		config.speed_hz = spi->max_speed_hz;
-	if (!config.bpw)
-		config.bpw = spi->bits_per_word;
-	if (!config.speed_hz)
-		config.speed_hz = spi->max_speed_hz;
-
-	/* Initialize the functions for transfer */
-	if (config.bpw <= 8) {
-		spi_imx->rx = spi_imx_buf_rx_u8;
-		spi_imx->tx = spi_imx_buf_tx_u8;
-	} else if (config.bpw <= 16) {
-		spi_imx->rx = spi_imx_buf_rx_u16;
-		spi_imx->tx = spi_imx_buf_tx_u16;
-	} else if (config.bpw <= 32) {
-		spi_imx->rx = spi_imx_buf_rx_u32;
-		spi_imx->tx = spi_imx_buf_tx_u32;
-	} else
-		BUG();
-
-	spi_imx->devtype_data.config(spi_imx, &config);
-
-	return 0;
-}
-
-static int spi_imx_transfer(struct spi_device *spi,
-				struct spi_transfer *transfer)
-{
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
-
-	spi_imx->tx_buf = transfer->tx_buf;
-	spi_imx->rx_buf = transfer->rx_buf;
-	spi_imx->count = transfer->len;
-	spi_imx->txfifo = 0;
-
-	init_completion(&spi_imx->xfer_done);
-
-	spi_imx_push(spi_imx);
-
-	spi_imx->devtype_data.intctrl(spi_imx, MXC_INT_TE);
-
-	wait_for_completion(&spi_imx->xfer_done);
-
-	return transfer->len;
-}
-
-static int spi_imx_setup(struct spi_device *spi)
-{
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
-	int gpio = spi_imx->chipselect[spi->chip_select];
-
-	dev_dbg(&spi->dev, "%s: mode %d, %u bpw, %d hz\n", __func__,
-		 spi->mode, spi->bits_per_word, spi->max_speed_hz);
-
-	if (gpio >= 0)
-		gpio_direction_output(gpio, spi->mode & SPI_CS_HIGH ? 0 : 1);
-
-	spi_imx_chipselect(spi, BITBANG_CS_INACTIVE);
-
-	return 0;
-}
-
-static void spi_imx_cleanup(struct spi_device *spi)
-{
-}
-
-static struct platform_device_id spi_imx_devtype[] = {
-	{
-		.name = "imx1-cspi",
-		.driver_data = SPI_IMX_VER_IMX1,
-	}, {
-		.name = "imx21-cspi",
-		.driver_data = SPI_IMX_VER_0_0,
-	}, {
-		.name = "imx25-cspi",
-		.driver_data = SPI_IMX_VER_0_7,
-	}, {
-		.name = "imx27-cspi",
-		.driver_data = SPI_IMX_VER_0_0,
-	}, {
-		.name = "imx31-cspi",
-		.driver_data = SPI_IMX_VER_0_4,
-	}, {
-		.name = "imx35-cspi",
-		.driver_data = SPI_IMX_VER_0_7,
-	}, {
-		.name = "imx51-cspi",
-		.driver_data = SPI_IMX_VER_0_7,
-	}, {
-		.name = "imx51-ecspi",
-		.driver_data = SPI_IMX_VER_2_3,
-	}, {
-		.name = "imx53-cspi",
-		.driver_data = SPI_IMX_VER_0_7,
-	}, {
-		.name = "imx53-ecspi",
-		.driver_data = SPI_IMX_VER_2_3,
-	}, {
-		/* sentinel */
-	}
-};
-
-static int __devinit spi_imx_probe(struct platform_device *pdev)
-{
-	struct spi_imx_master *mxc_platform_info;
-	struct spi_master *master;
-	struct spi_imx_data *spi_imx;
-	struct resource *res;
-	int i, ret;
-
-	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;
-	}
-
-	master = spi_alloc_master(&pdev->dev, sizeof(struct spi_imx_data));
-	if (!master)
-		return -ENOMEM;
-
-	platform_set_drvdata(pdev, master);
-
-	master->bus_num = pdev->id;
-	master->num_chipselect = mxc_platform_info->num_chipselect;
-
-	spi_imx = spi_master_get_devdata(master);
-	spi_imx->bitbang.master = spi_master_get(master);
-	spi_imx->chipselect = mxc_platform_info->chipselect;
-
-	for (i = 0; i < master->num_chipselect; i++) {
-		if (spi_imx->chipselect[i] < 0)
-			continue;
-		ret = gpio_request(spi_imx->chipselect[i], DRIVER_NAME);
-		if (ret) {
-			while (i > 0) {
-				i--;
-				if (spi_imx->chipselect[i] >= 0)
-					gpio_free(spi_imx->chipselect[i]);
-			}
-			dev_err(&pdev->dev, "can't get cs gpios\n");
-			goto out_master_put;
-		}
-	}
-
-	spi_imx->bitbang.chipselect = spi_imx_chipselect;
-	spi_imx->bitbang.setup_transfer = spi_imx_setupxfer;
-	spi_imx->bitbang.txrx_bufs = spi_imx_transfer;
-	spi_imx->bitbang.master->setup = spi_imx_setup;
-	spi_imx->bitbang.master->cleanup = spi_imx_cleanup;
-	spi_imx->bitbang.master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH;
-
-	init_completion(&spi_imx->xfer_done);
-
-	spi_imx->devtype_data =
-		spi_imx_devtype_data[pdev->id_entry->driver_data];
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "can't get platform resource\n");
-		ret = -ENOMEM;
-		goto out_gpio_free;
-	}
-
-	if (!request_mem_region(res->start, resource_size(res), pdev->name)) {
-		dev_err(&pdev->dev, "request_mem_region failed\n");
-		ret = -EBUSY;
-		goto out_gpio_free;
-	}
-
-	spi_imx->base = ioremap(res->start, resource_size(res));
-	if (!spi_imx->base) {
-		ret = -EINVAL;
-		goto out_release_mem;
-	}
-
-	spi_imx->irq = platform_get_irq(pdev, 0);
-	if (spi_imx->irq < 0) {
-		ret = -EINVAL;
-		goto out_iounmap;
-	}
-
-	ret = request_irq(spi_imx->irq, spi_imx_isr, 0, DRIVER_NAME, spi_imx);
-	if (ret) {
-		dev_err(&pdev->dev, "can't get irq%d: %d\n", spi_imx->irq, ret);
-		goto out_iounmap;
-	}
-
-	spi_imx->clk = clk_get(&pdev->dev, NULL);
-	if (IS_ERR(spi_imx->clk)) {
-		dev_err(&pdev->dev, "unable to get clock\n");
-		ret = PTR_ERR(spi_imx->clk);
-		goto out_free_irq;
-	}
-
-	clk_enable(spi_imx->clk);
-	spi_imx->spi_clk = clk_get_rate(spi_imx->clk);
-
-	spi_imx->devtype_data.reset(spi_imx);
-
-	spi_imx->devtype_data.intctrl(spi_imx, 0);
-
-	ret = spi_bitbang_start(&spi_imx->bitbang);
-	if (ret) {
-		dev_err(&pdev->dev, "bitbang start failed with %d\n", ret);
-		goto out_clk_put;
-	}
-
-	dev_info(&pdev->dev, "probed\n");
-
-	return ret;
-
-out_clk_put:
-	clk_disable(spi_imx->clk);
-	clk_put(spi_imx->clk);
-out_free_irq:
-	free_irq(spi_imx->irq, spi_imx);
-out_iounmap:
-	iounmap(spi_imx->base);
-out_release_mem:
-	release_mem_region(res->start, resource_size(res));
-out_gpio_free:
-	for (i = 0; i < master->num_chipselect; i++)
-		if (spi_imx->chipselect[i] >= 0)
-			gpio_free(spi_imx->chipselect[i]);
-out_master_put:
-	spi_master_put(master);
-	kfree(master);
-	platform_set_drvdata(pdev, NULL);
-	return ret;
-}
-
-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);
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
-	int i;
-
-	spi_bitbang_stop(&spi_imx->bitbang);
-
-	writel(0, spi_imx->base + MXC_CSPICTRL);
-	clk_disable(spi_imx->clk);
-	clk_put(spi_imx->clk);
-	free_irq(spi_imx->irq, spi_imx);
-	iounmap(spi_imx->base);
-
-	for (i = 0; i < master->num_chipselect; i++)
-		if (spi_imx->chipselect[i] >= 0)
-			gpio_free(spi_imx->chipselect[i]);
-
-	spi_master_put(master);
-
-	release_mem_region(res->start, resource_size(res));
-
-	platform_set_drvdata(pdev, NULL);
-
-	return 0;
-}
-
-static struct platform_driver spi_imx_driver = {
-	.driver = {
-		   .name = DRIVER_NAME,
-		   .owner = THIS_MODULE,
-		   },
-	.id_table = spi_imx_devtype,
-	.probe = spi_imx_probe,
-	.remove = __devexit_p(spi_imx_remove),
-};
-
-static int __init spi_imx_init(void)
-{
-	return platform_driver_register(&spi_imx_driver);
-}
-
-static void __exit spi_imx_exit(void)
-{
-	platform_driver_unregister(&spi_imx_driver);
-}
-
-module_init(spi_imx_init);
-module_exit(spi_imx_exit);
-
-MODULE_DESCRIPTION("SPI Master Controller driver");
-MODULE_AUTHOR("Sascha Hauer, Pengutronix");
-MODULE_LICENSE("GPL");