Merge branch 'mcp23s08' of /home/linus/linux-pinctrl into devel

3 files changed, 0 insertions, 1065 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index dbde3ae03e74..75e64607b209 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1232,23 +1232,6 @@ config GPIO_XRA1403
 
 endmenu
 
-menu "SPI or I2C GPIO expanders"
-	depends on (SPI_MASTER && !I2C) || I2C
-
-config GPIO_MCP23S08
-	tristate "Microchip MCP23xxx I/O expander"
-	depends on OF_GPIO
-	select GPIOLIB_IRQCHIP
-	select REGMAP_I2C if I2C
-	select REGMAP if SPI_MASTER
-	help
-	  SPI/I2C driver for Microchip MCP23S08/MCP23S17/MCP23008/MCP23017
-	  I/O expanders.
-	  This provides a GPIO interface supporting inputs and outputs.
-	  The I2C versions of the chips can be used as interrupt-controller.
-
-endmenu
-
 menu "USB GPIO expanders"
 	depends on USB
 
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 4d9adc677ed6..43a326be2e57 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -77,7 +77,6 @@ obj-$(CONFIG_GPIO_MENZ127)	+= gpio-menz127.o
 obj-$(CONFIG_GPIO_MERRIFIELD)	+= gpio-merrifield.o
 obj-$(CONFIG_GPIO_MC33880)	+= gpio-mc33880.o
 obj-$(CONFIG_GPIO_MC9S08DZ60)	+= gpio-mc9s08dz60.o
-obj-$(CONFIG_GPIO_MCP23S08)	+= gpio-mcp23s08.o
 obj-$(CONFIG_GPIO_ML_IOH)	+= gpio-ml-ioh.o
 obj-$(CONFIG_GPIO_MM_LANTIQ)	+= gpio-mm-lantiq.o
 obj-$(CONFIG_GPIO_MOCKUP)      += gpio-mockup.o
diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c
deleted file mode 100644
index 2a57d024481d..000000000000
--- a/drivers/gpio/gpio-mcp23s08.c
+++ /dev/null
@@ -1,1047 +0,0 @@
-/*
- * MCP23S08 SPI/I2C GPIO gpio expander driver
- *
- * The inputs and outputs of the mcp23s08, mcp23s17, mcp23008 and mcp23017 are
- * supported.
- * For the I2C versions of the chips (mcp23008 and mcp23017) generation of
- * interrupts is also supported.
- * The hardware of the SPI versions of the chips (mcp23s08 and mcp23s17) is
- * also capable of generating interrupts, but the linux driver does not
- * support that yet.
- */
-
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/mutex.h>
-#include <linux/module.h>
-#include <linux/gpio.h>
-#include <linux/i2c.h>
-#include <linux/spi/spi.h>
-#include <linux/spi/mcp23s08.h>
-#include <linux/slab.h>
-#include <asm/byteorder.h>
-#include <linux/interrupt.h>
-#include <linux/of_irq.h>
-#include <linux/of_device.h>
-#include <linux/regmap.h>
-
-/**
- * MCP types supported by driver
- */
-#define MCP_TYPE_S08	0
-#define MCP_TYPE_S17	1
-#define MCP_TYPE_008	2
-#define MCP_TYPE_017	3
-#define MCP_TYPE_S18    4
-
-/* Registers are all 8 bits wide.
- *
- * The mcp23s17 has twice as many bits, and can be configured to work
- * with either 16 bit registers or with two adjacent 8 bit banks.
- */
-#define MCP_IODIR	0x00		/* init/reset:  all ones */
-#define MCP_IPOL	0x01
-#define MCP_GPINTEN	0x02
-#define MCP_DEFVAL	0x03
-#define MCP_INTCON	0x04
-#define MCP_IOCON	0x05
-#	define IOCON_MIRROR	(1 << 6)
-#	define IOCON_SEQOP	(1 << 5)
-#	define IOCON_HAEN	(1 << 3)
-#	define IOCON_ODR	(1 << 2)
-#	define IOCON_INTPOL	(1 << 1)
-#	define IOCON_INTCC	(1)
-#define MCP_GPPU	0x06
-#define MCP_INTF	0x07
-#define MCP_INTCAP	0x08
-#define MCP_GPIO	0x09
-#define MCP_OLAT	0x0a
-
-struct mcp23s08;
-
-struct mcp23s08 {
-	u8			addr;
-	bool			irq_active_high;
-	bool			reg_shift;
-
-	u16			cache[11];
-	u16			irq_rise;
-	u16			irq_fall;
-	int			irq;
-	bool			irq_controller;
-	/* lock protects the cached values */
-	struct mutex		lock;
-	struct mutex		irq_lock;
-
-	struct gpio_chip	chip;
-
-	struct regmap		*regmap;
-	struct device		*dev;
-};
-
-static const struct regmap_config mcp23x08_regmap = {
-	.reg_bits = 8,
-	.val_bits = 8,
-
-	.reg_stride = 1,
-	.max_register = MCP_OLAT,
-};
-
-static const struct regmap_config mcp23x17_regmap = {
-	.reg_bits = 8,
-	.val_bits = 16,
-
-	.reg_stride = 2,
-	.max_register = MCP_OLAT << 1,
-	.val_format_endian = REGMAP_ENDIAN_LITTLE,
-};
-
-/*----------------------------------------------------------------------*/
-
-#ifdef CONFIG_SPI_MASTER
-
-static int mcp23sxx_spi_write(void *context, const void *data, size_t count)
-{
-	struct mcp23s08 *mcp = context;
-	struct spi_device *spi = to_spi_device(mcp->dev);
-	struct spi_message m;
-	struct spi_transfer t[2] = { { .tx_buf = &mcp->addr, .len = 1, },
-				     { .tx_buf = data, .len = count, }, };
-
-	spi_message_init(&m);
-	spi_message_add_tail(&t[0], &m);
-	spi_message_add_tail(&t[1], &m);
-
-	return spi_sync(spi, &m);
-}
-
-static int mcp23sxx_spi_gather_write(void *context,
-				const void *reg, size_t reg_size,
-				const void *val, size_t val_size)
-{
-	struct mcp23s08 *mcp = context;
-	struct spi_device *spi = to_spi_device(mcp->dev);
-	struct spi_message m;
-	struct spi_transfer t[3] = { { .tx_buf = &mcp->addr, .len = 1, },
-				     { .tx_buf = reg, .len = reg_size, },
-				     { .tx_buf = val, .len = val_size, }, };
-
-	spi_message_init(&m);
-	spi_message_add_tail(&t[0], &m);
-	spi_message_add_tail(&t[1], &m);
-	spi_message_add_tail(&t[2], &m);
-
-	return spi_sync(spi, &m);
-}
-
-static int mcp23sxx_spi_read(void *context, const void *reg, size_t reg_size,
-				void *val, size_t val_size)
-{
-	struct mcp23s08 *mcp = context;
-	struct spi_device *spi = to_spi_device(mcp->dev);
-	u8 tx[2];
-
-	if (reg_size != 1)
-		return -EINVAL;
-
-	tx[0] = mcp->addr | 0x01;
-	tx[1] = *((u8 *) reg);
-
-	return spi_write_then_read(spi, tx, sizeof(tx), val, val_size);
-}
-
-static const struct regmap_bus mcp23sxx_spi_regmap = {
-	.write = mcp23sxx_spi_write,
-	.gather_write = mcp23sxx_spi_gather_write,
-	.read = mcp23sxx_spi_read,
-};
-
-#endif /* CONFIG_SPI_MASTER */
-
-static int mcp_read(struct mcp23s08 *mcp, unsigned int reg, unsigned int *val)
-{
-	return regmap_read(mcp->regmap, reg << mcp->reg_shift, val);
-}
-
-static int mcp_write(struct mcp23s08 *mcp, unsigned int reg, unsigned int val)
-{
-	return regmap_write(mcp->regmap, reg << mcp->reg_shift, val);
-}
-
-static int mcp_update_cache(struct mcp23s08 *mcp)
-{
-	int ret, reg, i;
-
-	for (i = 0; i < ARRAY_SIZE(mcp->cache); i++) {
-		ret = mcp_read(mcp, i, &reg);
-		if (ret < 0)
-			return ret;
-		mcp->cache[i] = reg;
-	}
-
-	return 0;
-}
-
-/*----------------------------------------------------------------------*/
-
-/* A given spi_device can represent up to eight mcp23sxx chips
- * sharing the same chipselect but using different addresses
- * (e.g. chips #0 and #3 might be populated, but not #1 or $2).
- * Driver data holds all the per-chip data.
- */
-struct mcp23s08_driver_data {
-	unsigned		ngpio;
-	struct mcp23s08		*mcp[8];
-	struct mcp23s08		chip[];
-};
-
-
-static int mcp23s08_direction_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct mcp23s08	*mcp = gpiochip_get_data(chip);
-	int status;
-
-	mutex_lock(&mcp->lock);
-	mcp->cache[MCP_IODIR] |= (1 << offset);
-	status = mcp_write(mcp, MCP_IODIR, mcp->cache[MCP_IODIR]);
-	mutex_unlock(&mcp->lock);
-	return status;
-}
-
-static int mcp23s08_get(struct gpio_chip *chip, unsigned offset)
-{
-	struct mcp23s08	*mcp = gpiochip_get_data(chip);
-	int status, ret;
-
-	mutex_lock(&mcp->lock);
-
-	/* REVISIT reading this clears any IRQ ... */
-	ret = mcp_read(mcp, MCP_GPIO, &status);
-	if (ret < 0)
-		status = 0;
-	else {
-		mcp->cache[MCP_GPIO] = status;
-		status = !!(status & (1 << offset));
-	}
-	mutex_unlock(&mcp->lock);
-	return status;
-}
-
-static int __mcp23s08_set(struct mcp23s08 *mcp, unsigned mask, int value)
-{
-	unsigned olat = mcp->cache[MCP_OLAT];
-
-	if (value)
-		olat |= mask;
-	else
-		olat &= ~mask;
-	mcp->cache[MCP_OLAT] = olat;
-	return mcp_write(mcp, MCP_OLAT, olat);
-}
-
-static void mcp23s08_set(struct gpio_chip *chip, unsigned offset, int value)
-{
-	struct mcp23s08	*mcp = gpiochip_get_data(chip);
-	unsigned mask = 1 << offset;
-
-	mutex_lock(&mcp->lock);
-	__mcp23s08_set(mcp, mask, value);
-	mutex_unlock(&mcp->lock);
-}
-
-static int
-mcp23s08_direction_output(struct gpio_chip *chip, unsigned offset, int value)
-{
-	struct mcp23s08	*mcp = gpiochip_get_data(chip);
-	unsigned mask = 1 << offset;
-	int status;
-
-	mutex_lock(&mcp->lock);
-	status = __mcp23s08_set(mcp, mask, value);
-	if (status == 0) {
-		mcp->cache[MCP_IODIR] &= ~mask;
-		status = mcp_write(mcp, MCP_IODIR, mcp->cache[MCP_IODIR]);
-	}
-	mutex_unlock(&mcp->lock);
-	return status;
-}
-
-/*----------------------------------------------------------------------*/
-static irqreturn_t mcp23s08_irq(int irq, void *data)
-{
-	struct mcp23s08 *mcp = data;
-	int intcap, intf, i, gpio, gpio_orig, intcap_mask;
-	unsigned int child_irq;
-	bool intf_set, intcap_changed, gpio_bit_changed,
-		defval_changed, gpio_set;
-
-	mutex_lock(&mcp->lock);
-	if (mcp_read(mcp, MCP_INTF, &intf) < 0) {
-		mutex_unlock(&mcp->lock);
-		return IRQ_HANDLED;
-	}
-
-	mcp->cache[MCP_INTF] = intf;
-
-	if (mcp_read(mcp, MCP_INTCAP, &intcap) < 0) {
-		mutex_unlock(&mcp->lock);
-		return IRQ_HANDLED;
-	}
-
-	mcp->cache[MCP_INTCAP] = intcap;
-
-	/* This clears the interrupt(configurable on S18) */
-	if (mcp_read(mcp, MCP_GPIO, &gpio) < 0) {
-		mutex_unlock(&mcp->lock);
-		return IRQ_HANDLED;
-	}
-	gpio_orig = mcp->cache[MCP_GPIO];
-	mcp->cache[MCP_GPIO] = gpio;
-	mutex_unlock(&mcp->lock);
-
-	if (mcp->cache[MCP_INTF] == 0) {
-		/* There is no interrupt pending */
-		return IRQ_HANDLED;
-	}
-
-	dev_dbg(mcp->chip.parent,
-		"intcap 0x%04X intf 0x%04X gpio_orig 0x%04X gpio 0x%04X\n",
-		intcap, intf, gpio_orig, gpio);
-
-	for (i = 0; i < mcp->chip.ngpio; i++) {
-		/* We must check all of the inputs on the chip,
-		 * otherwise we may not notice a change on >=2 pins.
-		 *
-		 * On at least the mcp23s17, INTCAP is only updated
-		 * one byte at a time(INTCAPA and INTCAPB are
-		 * not written to at the same time - only on a per-bank
-		 * basis).
-		 *
-		 * INTF only contains the single bit that caused the
-		 * interrupt per-bank.  On the mcp23s17, there is
-		 * INTFA and INTFB.  If two pins are changed on the A
-		 * side at the same time, INTF will only have one bit
-		 * set.  If one pin on the A side and one pin on the B
-		 * side are changed at the same time, INTF will have
-		 * two bits set.  Thus, INTF can't be the only check
-		 * to see if the input has changed.
-		 */
-
-		intf_set = BIT(i) & mcp->cache[MCP_INTF];
-		if (i < 8 && intf_set)
-			intcap_mask = 0x00FF;
-		else if (i >= 8 && intf_set)
-			intcap_mask = 0xFF00;
-		else
-			intcap_mask = 0x00;
-
-		intcap_changed = (intcap_mask &
-			(BIT(i) & mcp->cache[MCP_INTCAP])) !=
-			(intcap_mask & (BIT(i) & gpio_orig));
-		gpio_set = BIT(i) & mcp->cache[MCP_GPIO];
-		gpio_bit_changed = (BIT(i) & gpio_orig) !=
-			(BIT(i) & mcp->cache[MCP_GPIO]);
-		defval_changed = (BIT(i) & mcp->cache[MCP_INTCON]) &&
-			((BIT(i) & mcp->cache[MCP_GPIO]) !=
-			(BIT(i) & mcp->cache[MCP_DEFVAL]));
-
-		if (((gpio_bit_changed || intcap_changed) &&
-			(BIT(i) & mcp->irq_rise) && gpio_set) ||
-		    ((gpio_bit_changed || intcap_changed) &&
-			(BIT(i) & mcp->irq_fall) && !gpio_set) ||
-		    defval_changed) {
-			child_irq = irq_find_mapping(mcp->chip.irqdomain, i);
-			handle_nested_irq(child_irq);
-		}
-	}
-
-	return IRQ_HANDLED;
-}
-
-static void mcp23s08_irq_mask(struct irq_data *data)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
-	struct mcp23s08 *mcp = gpiochip_get_data(gc);
-	unsigned int pos = data->hwirq;
-
-	mcp->cache[MCP_GPINTEN] &= ~BIT(pos);
-}
-
-static void mcp23s08_irq_unmask(struct irq_data *data)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
-	struct mcp23s08 *mcp = gpiochip_get_data(gc);
-	unsigned int pos = data->hwirq;
-
-	mcp->cache[MCP_GPINTEN] |= BIT(pos);
-}
-
-static int mcp23s08_irq_set_type(struct irq_data *data, unsigned int type)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
-	struct mcp23s08 *mcp = gpiochip_get_data(gc);
-	unsigned int pos = data->hwirq;
-	int status = 0;
-
-	if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
-		mcp->cache[MCP_INTCON] &= ~BIT(pos);
-		mcp->irq_rise |= BIT(pos);
-		mcp->irq_fall |= BIT(pos);
-	} else if (type & IRQ_TYPE_EDGE_RISING) {
-		mcp->cache[MCP_INTCON] &= ~BIT(pos);
-		mcp->irq_rise |= BIT(pos);
-		mcp->irq_fall &= ~BIT(pos);
-	} else if (type & IRQ_TYPE_EDGE_FALLING) {
-		mcp->cache[MCP_INTCON] &= ~BIT(pos);
-		mcp->irq_rise &= ~BIT(pos);
-		mcp->irq_fall |= BIT(pos);
-	} else if (type & IRQ_TYPE_LEVEL_HIGH) {
-		mcp->cache[MCP_INTCON] |= BIT(pos);
-		mcp->cache[MCP_DEFVAL] &= ~BIT(pos);
-	} else if (type & IRQ_TYPE_LEVEL_LOW) {
-		mcp->cache[MCP_INTCON] |= BIT(pos);
-		mcp->cache[MCP_DEFVAL] |= BIT(pos);
-	} else
-		return -EINVAL;
-
-	return status;
-}
-
-static void mcp23s08_irq_bus_lock(struct irq_data *data)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
-	struct mcp23s08 *mcp = gpiochip_get_data(gc);
-
-	mutex_lock(&mcp->irq_lock);
-}
-
-static void mcp23s08_irq_bus_unlock(struct irq_data *data)
-{
-	struct gpio_chip *gc = irq_data_get_irq_chip_data(data);
-	struct mcp23s08 *mcp = gpiochip_get_data(gc);
-
-	mutex_lock(&mcp->lock);
-	mcp_write(mcp, MCP_GPINTEN, mcp->cache[MCP_GPINTEN]);
-	mcp_write(mcp, MCP_DEFVAL, mcp->cache[MCP_DEFVAL]);
-	mcp_write(mcp, MCP_INTCON, mcp->cache[MCP_INTCON]);
-	mutex_unlock(&mcp->lock);
-	mutex_unlock(&mcp->irq_lock);
-}
-
-static struct irq_chip mcp23s08_irq_chip = {
-	.name = "gpio-mcp23xxx",
-	.irq_mask = mcp23s08_irq_mask,
-	.irq_unmask = mcp23s08_irq_unmask,
-	.irq_set_type = mcp23s08_irq_set_type,
-	.irq_bus_lock = mcp23s08_irq_bus_lock,
-	.irq_bus_sync_unlock = mcp23s08_irq_bus_unlock,
-};
-
-static int mcp23s08_irq_setup(struct mcp23s08 *mcp)
-{
-	struct gpio_chip *chip = &mcp->chip;
-	int err;
-	unsigned long irqflags = IRQF_ONESHOT | IRQF_SHARED;
-
-	mutex_init(&mcp->irq_lock);
-
-	if (mcp->irq_active_high)
-		irqflags |= IRQF_TRIGGER_HIGH;
-	else
-		irqflags |= IRQF_TRIGGER_LOW;
-
-	err = devm_request_threaded_irq(chip->parent, mcp->irq, NULL,
-					mcp23s08_irq,
-					irqflags, dev_name(chip->parent), mcp);
-	if (err != 0) {
-		dev_err(chip->parent, "unable to request IRQ#%d: %d\n",
-			mcp->irq, err);
-		return err;
-	}
-
-	err =  gpiochip_irqchip_add_nested(chip,
-					   &mcp23s08_irq_chip,
-					   0,
-					   handle_simple_irq,
-					   IRQ_TYPE_NONE);
-	if (err) {
-		dev_err(chip->parent,
-			"could not connect irqchip to gpiochip: %d\n", err);
-		return err;
-	}
-
-	gpiochip_set_nested_irqchip(chip,
-				    &mcp23s08_irq_chip,
-				    mcp->irq);
-
-	return 0;
-}
-
-/*----------------------------------------------------------------------*/
-
-#ifdef CONFIG_DEBUG_FS
-
-#include <linux/seq_file.h>
-
-/*
- * This shows more info than the generic gpio dump code:
- * pullups, deglitching, open drain drive.
- */
-static void mcp23s08_dbg_show(struct seq_file *s, struct gpio_chip *chip)
-{
-	struct mcp23s08	*mcp;
-	char		bank;
-	int		t;
-	unsigned	mask;
-
-	mcp = gpiochip_get_data(chip);
-
-	/* NOTE: we only handle one bank for now ... */
-	bank = '0' + ((mcp->addr >> 1) & 0x7);
-
-	mutex_lock(&mcp->lock);
-	t = mcp_update_cache(mcp);
-	if (t < 0) {
-		seq_printf(s, " I/O ERROR %d\n", t);
-		goto done;
-	}
-
-	for (t = 0, mask = 1; t < chip->ngpio; t++, mask <<= 1) {
-		const char	*label;
-
-		label = gpiochip_is_requested(chip, t);
-		if (!label)
-			continue;
-
-		seq_printf(s, " gpio-%-3d P%c.%d (%-12s) %s %s %s",
-			chip->base + t, bank, t, label,
-			(mcp->cache[MCP_IODIR] & mask) ? "in " : "out",
-			(mcp->cache[MCP_GPIO] & mask) ? "hi" : "lo",
-			(mcp->cache[MCP_GPPU] & mask) ? "up" : "  ");
-		/* NOTE:  ignoring the irq-related registers */
-		seq_puts(s, "\n");
-	}
-done:
-	mutex_unlock(&mcp->lock);
-}
-
-#else
-#define mcp23s08_dbg_show	NULL
-#endif
-
-/*----------------------------------------------------------------------*/
-
-static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
-			      void *data, unsigned addr, unsigned type,
-			      struct mcp23s08_platform_data *pdata, int cs)
-{
-	int status, ret;
-	bool mirror = false;
-
-	mutex_init(&mcp->lock);
-
-	mcp->dev = dev;
-	mcp->addr = addr;
-	mcp->irq_active_high = false;
-
-	mcp->chip.direction_input = mcp23s08_direction_input;
-	mcp->chip.get = mcp23s08_get;
-	mcp->chip.direction_output = mcp23s08_direction_output;
-	mcp->chip.set = mcp23s08_set;
-	mcp->chip.dbg_show = mcp23s08_dbg_show;
-#ifdef CONFIG_OF_GPIO
-	mcp->chip.of_gpio_n_cells = 2;
-	mcp->chip.of_node = dev->of_node;
-#endif
-
-	switch (type) {
-#ifdef CONFIG_SPI_MASTER
-	case MCP_TYPE_S08:
-		mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
-					       &mcp23x08_regmap);
-		mcp->reg_shift = 0;
-		mcp->chip.ngpio = 8;
-		mcp->chip.label = "mcp23s08";
-		break;
-
-	case MCP_TYPE_S17:
-		mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
-					       &mcp23x17_regmap);
-		mcp->reg_shift = 1;
-		mcp->chip.ngpio = 16;
-		mcp->chip.label = "mcp23s17";
-		break;
-
-	case MCP_TYPE_S18:
-		mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
-					       &mcp23x17_regmap);
-		mcp->reg_shift = 1;
-		mcp->chip.ngpio = 16;
-		mcp->chip.label = "mcp23s18";
-		break;
-#endif /* CONFIG_SPI_MASTER */
-
-#if IS_ENABLED(CONFIG_I2C)
-	case MCP_TYPE_008:
-		mcp->regmap = devm_regmap_init_i2c(data, &mcp23x08_regmap);
-		mcp->reg_shift = 0;
-		mcp->chip.ngpio = 8;
-		mcp->chip.label = "mcp23008";
-		break;
-
-	case MCP_TYPE_017:
-		mcp->regmap = devm_regmap_init_i2c(data, &mcp23x17_regmap);
-		mcp->reg_shift = 1;
-		mcp->chip.ngpio = 16;
-		mcp->chip.label = "mcp23017";
-		break;
-#endif /* CONFIG_I2C */
-
-	default:
-		dev_err(dev, "invalid device type (%d)\n", type);
-		return -EINVAL;
-	}
-
-	if (IS_ERR(mcp->regmap))
-		return PTR_ERR(mcp->regmap);
-
-	mcp->chip.base = pdata->base;
-	mcp->chip.can_sleep = true;
-	mcp->chip.parent = dev;
-	mcp->chip.owner = THIS_MODULE;
-
-	/* verify MCP_IOCON.SEQOP = 0, so sequential reads work,
-	 * and MCP_IOCON.HAEN = 1, so we work with all chips.
-	 */
-
-	ret = mcp_read(mcp, MCP_IOCON, &status);
-	if (ret < 0)
-		goto fail;
-
-	mcp->irq_controller = pdata->irq_controller;
-	if (mcp->irq && mcp->irq_controller) {
-		mcp->irq_active_high =
-			of_property_read_bool(mcp->chip.parent->of_node,
-					      "microchip,irq-active-high");
-
-		mirror = pdata->mirror;
-	}
-
-	if ((status & IOCON_SEQOP) || !(status & IOCON_HAEN) || mirror ||
-	     mcp->irq_active_high) {
-		/* mcp23s17 has IOCON twice, make sure they are in sync */
-		status &= ~(IOCON_SEQOP | (IOCON_SEQOP << 8));
-		status |= IOCON_HAEN | (IOCON_HAEN << 8);
-		if (mcp->irq_active_high)
-			status |= IOCON_INTPOL | (IOCON_INTPOL << 8);
-		else
-			status &= ~(IOCON_INTPOL | (IOCON_INTPOL << 8));
-
-		if (mirror)
-			status |= IOCON_MIRROR | (IOCON_MIRROR << 8);
-
-		if (type == MCP_TYPE_S18)
-			status |= IOCON_INTCC | (IOCON_INTCC << 8);
-
-		ret = mcp_write(mcp, MCP_IOCON, status);
-		if (ret < 0)
-			goto fail;
-	}
-
-	/* configure ~100K pullups */
-	ret = mcp_write(mcp, MCP_GPPU, pdata->chip[cs].pullups);
-	if (ret < 0)
-		goto fail;
-
-	ret = mcp_update_cache(mcp);
-	if (ret < 0)
-		goto fail;
-
-	/* disable inverter on input */
-	if (mcp->cache[MCP_IPOL] != 0) {
-		mcp->cache[MCP_IPOL] = 0;
-		ret = mcp_write(mcp, MCP_IPOL, 0);
-		if (ret < 0)
-			goto fail;
-	}
-
-	/* disable irqs */
-	if (mcp->cache[MCP_GPINTEN] != 0) {
-		mcp->cache[MCP_GPINTEN] = 0;
-		ret = mcp_write(mcp, MCP_GPINTEN, 0);
-		if (ret < 0)
-			goto fail;
-	}
-
-	ret = gpiochip_add_data(&mcp->chip, mcp);
-	if (ret < 0)
-		goto fail;
-
-	if (mcp->irq && mcp->irq_controller) {
-		ret = mcp23s08_irq_setup(mcp);
-		if (ret)
-			goto fail;
-	}
-fail:
-	if (ret < 0)
-		dev_dbg(dev, "can't setup chip %d, --> %d\n", addr, ret);
-	return ret;
-}
-
-/*----------------------------------------------------------------------*/
-
-#ifdef CONFIG_OF
-#ifdef CONFIG_SPI_MASTER
-static const struct of_device_id mcp23s08_spi_of_match[] = {
-	{
-		.compatible = "microchip,mcp23s08",
-		.data = (void *) MCP_TYPE_S08,
-	},
-	{
-		.compatible = "microchip,mcp23s17",
-		.data = (void *) MCP_TYPE_S17,
-	},
-	{
-		.compatible = "microchip,mcp23s18",
-		.data = (void *) MCP_TYPE_S18,
-	},
-/* NOTE: The use of the mcp prefix is deprecated and will be removed. */
-	{
-		.compatible = "mcp,mcp23s08",
-		.data = (void *) MCP_TYPE_S08,
-	},
-	{
-		.compatible = "mcp,mcp23s17",
-		.data = (void *) MCP_TYPE_S17,
-	},
-	{ },
-};
-MODULE_DEVICE_TABLE(of, mcp23s08_spi_of_match);
-#endif
-
-#if IS_ENABLED(CONFIG_I2C)
-static const struct of_device_id mcp23s08_i2c_of_match[] = {
-	{
-		.compatible = "microchip,mcp23008",
-		.data = (void *) MCP_TYPE_008,
-	},
-	{
-		.compatible = "microchip,mcp23017",
-		.data = (void *) MCP_TYPE_017,
-	},
-/* NOTE: The use of the mcp prefix is deprecated and will be removed. */
-	{
-		.compatible = "mcp,mcp23008",
-		.data = (void *) MCP_TYPE_008,
-	},
-	{
-		.compatible = "mcp,mcp23017",
-		.data = (void *) MCP_TYPE_017,
-	},
-	{ },
-};
-MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match);
-#endif
-#endif /* CONFIG_OF */
-
-
-#if IS_ENABLED(CONFIG_I2C)
-
-static int mcp230xx_probe(struct i2c_client *client,
-				    const struct i2c_device_id *id)
-{
-	struct mcp23s08_platform_data *pdata, local_pdata;
-	struct mcp23s08 *mcp;
-	int status;
-	const struct of_device_id *match;
-
-	match = of_match_device(of_match_ptr(mcp23s08_i2c_of_match),
-					&client->dev);
-	if (match) {
-		pdata = &local_pdata;
-		pdata->base = -1;
-		pdata->chip[0].pullups = 0;
-		pdata->irq_controller =	of_property_read_bool(
-					client->dev.of_node,
-					"interrupt-controller");
-		pdata->mirror = of_property_read_bool(client->dev.of_node,
-						      "microchip,irq-mirror");
-		client->irq = irq_of_parse_and_map(client->dev.of_node, 0);
-	} else {
-		pdata = dev_get_platdata(&client->dev);
-		if (!pdata) {
-			pdata = devm_kzalloc(&client->dev,
-					sizeof(struct mcp23s08_platform_data),
-					GFP_KERNEL);
-			if (!pdata)
-				return -ENOMEM;
-			pdata->base = -1;
-		}
-	}
-
-	mcp = kzalloc(sizeof(*mcp), GFP_KERNEL);
-	if (!mcp)
-		return -ENOMEM;
-
-	mcp->irq = client->irq;
-	status = mcp23s08_probe_one(mcp, &client->dev, client, client->addr,
-				    id->driver_data, pdata, 0);
-	if (status)
-		goto fail;
-
-	i2c_set_clientdata(client, mcp);
-
-	return 0;
-
-fail:
-	kfree(mcp);
-
-	return status;
-}
-
-static int mcp230xx_remove(struct i2c_client *client)
-{
-	struct mcp23s08 *mcp = i2c_get_clientdata(client);
-
-	gpiochip_remove(&mcp->chip);
-	kfree(mcp);
-
-	return 0;
-}
-
-static const struct i2c_device_id mcp230xx_id[] = {
-	{ "mcp23008", MCP_TYPE_008 },
-	{ "mcp23017", MCP_TYPE_017 },
-	{ },
-};
-MODULE_DEVICE_TABLE(i2c, mcp230xx_id);
-
-static struct i2c_driver mcp230xx_driver = {
-	.driver = {
-		.name	= "mcp230xx",
-		.of_match_table = of_match_ptr(mcp23s08_i2c_of_match),
-	},
-	.probe		= mcp230xx_probe,
-	.remove		= mcp230xx_remove,
-	.id_table	= mcp230xx_id,
-};
-
-static int __init mcp23s08_i2c_init(void)
-{
-	return i2c_add_driver(&mcp230xx_driver);
-}
-
-static void mcp23s08_i2c_exit(void)
-{
-	i2c_del_driver(&mcp230xx_driver);
-}
-
-#else
-
-static int __init mcp23s08_i2c_init(void) { return 0; }
-static void mcp23s08_i2c_exit(void) { }
-
-#endif /* CONFIG_I2C */
-
-/*----------------------------------------------------------------------*/
-
-#ifdef CONFIG_SPI_MASTER
-
-static int mcp23s08_probe(struct spi_device *spi)
-{
-	struct mcp23s08_platform_data	*pdata, local_pdata;
-	unsigned			addr;
-	int				chips = 0;
-	struct mcp23s08_driver_data	*data;
-	int				status, type;
-	unsigned			ngpio = 0;
-	const struct			of_device_id *match;
-	u32				spi_present_mask = 0;
-
-	match = of_match_device(of_match_ptr(mcp23s08_spi_of_match), &spi->dev);
-	if (match) {
-		type = (int)(uintptr_t)match->data;
-		status = of_property_read_u32(spi->dev.of_node,
-			    "microchip,spi-present-mask", &spi_present_mask);
-		if (status) {
-			status = of_property_read_u32(spi->dev.of_node,
-				    "mcp,spi-present-mask", &spi_present_mask);
-			if (status) {
-				dev_err(&spi->dev,
-					"DT has no spi-present-mask\n");
-				return -ENODEV;
-			}
-		}
-		if ((spi_present_mask <= 0) || (spi_present_mask >= 256)) {
-			dev_err(&spi->dev, "invalid spi-present-mask\n");
-			return -ENODEV;
-		}
-
-		pdata = &local_pdata;
-		pdata->base = -1;
-		for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
-			pdata->chip[addr].pullups = 0;
-			if (spi_present_mask & (1 << addr))
-				chips++;
-		}
-		pdata->irq_controller =	of_property_read_bool(
-					spi->dev.of_node,
-					"interrupt-controller");
-		pdata->mirror = of_property_read_bool(spi->dev.of_node,
-						      "microchip,irq-mirror");
-	} else {
-		type = spi_get_device_id(spi)->driver_data;
-		pdata = dev_get_platdata(&spi->dev);
-		if (!pdata) {
-			pdata = devm_kzalloc(&spi->dev,
-					sizeof(struct mcp23s08_platform_data),
-					GFP_KERNEL);
-			pdata->base = -1;
-		}
-
-		for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
-			if (!pdata->chip[addr].is_present)
-				continue;
-			chips++;
-			if ((type == MCP_TYPE_S08) && (addr > 3)) {
-				dev_err(&spi->dev,
-					"mcp23s08 only supports address 0..3\n");
-				return -EINVAL;
-			}
-			spi_present_mask |= 1 << addr;
-		}
-	}
-
-	if (!chips)
-		return -ENODEV;
-
-	data = devm_kzalloc(&spi->dev,
-			    sizeof(*data) + chips * sizeof(struct mcp23s08),
-			    GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	spi_set_drvdata(spi, data);
-
-	spi->irq = irq_of_parse_and_map(spi->dev.of_node, 0);
-
-	for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
-		if (!(spi_present_mask & (1 << addr)))
-			continue;
-		chips--;
-		data->mcp[addr] = &data->chip[chips];
-		data->mcp[addr]->irq = spi->irq;
-		status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi,
-					    0x40 | (addr << 1), type, pdata,
-					    addr);
-		if (status < 0)
-			goto fail;
-
-		if (pdata->base != -1)
-			pdata->base += data->mcp[addr]->chip.ngpio;
-		ngpio += data->mcp[addr]->chip.ngpio;
-	}
-	data->ngpio = ngpio;
-
-	/* NOTE:  these chips have a relatively sane IRQ framework, with
-	 * per-signal masking and level/edge triggering.  It's not yet
-	 * handled here...
-	 */
-
-	return 0;
-
-fail:
-	for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
-
-		if (!data->mcp[addr])
-			continue;
-		gpiochip_remove(&data->mcp[addr]->chip);
-	}
-	return status;
-}
-
-static int mcp23s08_remove(struct spi_device *spi)
-{
-	struct mcp23s08_driver_data	*data = spi_get_drvdata(spi);
-	unsigned			addr;
-
-	for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
-
-		if (!data->mcp[addr])
-			continue;
-
-		gpiochip_remove(&data->mcp[addr]->chip);
-	}
-
-	return 0;
-}
-
-static const struct spi_device_id mcp23s08_ids[] = {
-	{ "mcp23s08", MCP_TYPE_S08 },
-	{ "mcp23s17", MCP_TYPE_S17 },
-	{ "mcp23s18", MCP_TYPE_S18 },
-	{ },
-};
-MODULE_DEVICE_TABLE(spi, mcp23s08_ids);
-
-static struct spi_driver mcp23s08_driver = {
-	.probe		= mcp23s08_probe,
-	.remove		= mcp23s08_remove,
-	.id_table	= mcp23s08_ids,
-	.driver = {
-		.name	= "mcp23s08",
-		.of_match_table = of_match_ptr(mcp23s08_spi_of_match),
-	},
-};
-
-static int __init mcp23s08_spi_init(void)
-{
-	return spi_register_driver(&mcp23s08_driver);
-}
-
-static void mcp23s08_spi_exit(void)
-{
-	spi_unregister_driver(&mcp23s08_driver);
-}
-
-#else
-
-static int __init mcp23s08_spi_init(void) { return 0; }
-static void mcp23s08_spi_exit(void) { }
-
-#endif /* CONFIG_SPI_MASTER */
-
-/*----------------------------------------------------------------------*/
-
-static int __init mcp23s08_init(void)
-{
-	int ret;
-
-	ret = mcp23s08_spi_init();
-	if (ret)
-		goto spi_fail;
-
-	ret = mcp23s08_i2c_init();
-	if (ret)
-		goto i2c_fail;
-
-	return 0;
-
- i2c_fail:
-	mcp23s08_spi_exit();
- spi_fail:
-	return ret;
-}
-/* register after spi/i2c postcore initcall and before
- * subsys initcalls that may rely on these GPIOs
- */
-subsys_initcall(mcp23s08_init);
-
-static void __exit mcp23s08_exit(void)
-{
-	mcp23s08_spi_exit();
-	mcp23s08_i2c_exit();
-}
-module_exit(mcp23s08_exit);
-
-MODULE_LICENSE("GPL");