1 files changed, 19 insertions, 495 deletions

diff --git a/drivers/pinctrl/pinctrl-mcp23s08.c b/drivers/pinctrl/pinctrl-mcp23s08.c
index 3a235487e38d..151931b593f6 100644
--- a/drivers/pinctrl/pinctrl-mcp23s08.c
+++ b/drivers/pinctrl/pinctrl-mcp23s08.c
@@ -1,34 +1,23 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /* MCP23S08 SPI/I2C GPIO driver */
 
+#include <linux/bitops.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/mutex.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
+#include <linux/export.h>
 #include <linux/gpio/driver.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_device.h>
 #include <linux/regmap.h>
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/pinconf.h>
 #include <linux/pinctrl/pinconf-generic.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
-#define MCP_TYPE_018    5
-
-#define MCP_MAX_DEV_PER_CS	8
+#include "pinctrl-mcp23s08.h"
 
 /* Registers are all 8 bits wide.
  *
@@ -53,31 +42,6 @@
 #define MCP_GPIO	0x09
 #define MCP_OLAT	0x0a
 
-struct mcp23s08;
-
-struct mcp23s08 {
-	u8			addr;
-	bool			irq_active_high;
-	bool			reg_shift;
-
-	u16			irq_rise;
-	u16			irq_fall;
-	int			irq;
-	bool			irq_controller;
-	int			cached_gpio;
-	/* lock protects regmap access with bypass/cache flags */
-	struct mutex		lock;
-
-	struct gpio_chip	chip;
-	struct irq_chip		irq_chip;
-
-	struct regmap		*regmap;
-	struct device		*dev;
-
-	struct pinctrl_dev	*pctldev;
-	struct pinctrl_desc	pinctrl_desc;
-};
-
 static const struct reg_default mcp23x08_defaults[] = {
 	{.reg = MCP_IODIR,		.def = 0xff},
 	{.reg = MCP_IPOL,		.def = 0x00},
@@ -109,7 +73,7 @@ static const struct regmap_access_table mcp23x08_precious_table = {
 	.n_yes_ranges = 1,
 };
 
-static const struct regmap_config mcp23x08_regmap = {
+const struct regmap_config mcp23x08_regmap = {
 	.reg_bits = 8,
 	.val_bits = 8,
 
@@ -121,6 +85,7 @@ static const struct regmap_config mcp23x08_regmap = {
 	.cache_type = REGCACHE_FLAT,
 	.max_register = MCP_OLAT,
 };
+EXPORT_SYMBOL_GPL(mcp23x08_regmap);
 
 static const struct reg_default mcp23x16_defaults[] = {
 	{.reg = MCP_IODIR << 1,		.def = 0xffff},
@@ -153,7 +118,7 @@ static const struct regmap_access_table mcp23x16_precious_table = {
 	.n_yes_ranges = 1,
 };
 
-static const struct regmap_config mcp23x17_regmap = {
+const struct regmap_config mcp23x17_regmap = {
 	.reg_bits = 8,
 	.val_bits = 16,
 
@@ -166,6 +131,7 @@ static const struct regmap_config mcp23x17_regmap = {
 	.cache_type = REGCACHE_FLAT,
 	.val_format_endian = REGMAP_ENDIAN_LITTLE,
 };
+EXPORT_SYMBOL_GPL(mcp23x17_regmap);
 
 static int mcp_read(struct mcp23s08 *mcp, unsigned int reg, unsigned int *val)
 {
@@ -309,80 +275,6 @@ static const struct pinconf_ops mcp_pinconf_ops = {
 
 /*----------------------------------------------------------------------*/
 
-#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 */
-
-/*----------------------------------------------------------------------*/
-
-/* 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);
@@ -562,7 +454,6 @@ 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_set_bit(mcp, MCP_INTCON, pos, false);
@@ -585,7 +476,7 @@ static int mcp23s08_irq_set_type(struct irq_data *data, unsigned int type)
 	} else
 		return -EINVAL;
 
-	return status;
+	return 0;
 }
 
 static void mcp23s08_irq_bus_lock(struct irq_data *data)
@@ -656,21 +547,25 @@ static int mcp23s08_irqchip_setup(struct mcp23s08 *mcp)
 
 /*----------------------------------------------------------------------*/
 
-static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
-			      void *data, unsigned addr, unsigned type,
-			      unsigned int base, int cs)
+int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
+		       unsigned int addr, unsigned int type, unsigned int base)
 {
 	int status, ret;
 	bool mirror = false;
 	bool open_drain = false;
-	struct regmap_config *one_regmap_config = NULL;
-	int raw_chip_address = (addr & ~0x40) >> 1;
 
 	mutex_init(&mcp->lock);
 
 	mcp->dev = dev;
 	mcp->addr = addr;
+
 	mcp->irq_active_high = false;
+	mcp->irq_chip.name = dev_name(dev);
+	mcp->irq_chip.irq_mask = mcp23s08_irq_mask;
+	mcp->irq_chip.irq_unmask = mcp23s08_irq_unmask;
+	mcp->irq_chip.irq_set_type = mcp23s08_irq_set_type;
+	mcp->irq_chip.irq_bus_lock = mcp23s08_irq_bus_lock;
+	mcp->irq_chip.irq_bus_sync_unlock = mcp23s08_irq_bus_unlock;
 
 	mcp->chip.direction_input = mcp23s08_direction_input;
 	mcp->chip.get = mcp23s08_get;
@@ -681,83 +576,6 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
 	mcp->chip.of_node = dev->of_node;
 #endif
 
-	switch (type) {
-#ifdef CONFIG_SPI_MASTER
-	case MCP_TYPE_S08:
-	case MCP_TYPE_S17:
-		switch (type) {
-		case MCP_TYPE_S08:
-			one_regmap_config =
-				devm_kmemdup(dev, &mcp23x08_regmap,
-					sizeof(struct regmap_config), GFP_KERNEL);
-			mcp->reg_shift = 0;
-			mcp->chip.ngpio = 8;
-			mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL,
-					"mcp23s08.%d", raw_chip_address);
-			break;
-		case MCP_TYPE_S17:
-			one_regmap_config =
-				devm_kmemdup(dev, &mcp23x17_regmap,
-					sizeof(struct regmap_config), GFP_KERNEL);
-			mcp->reg_shift = 1;
-			mcp->chip.ngpio = 16;
-			mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL,
-					"mcp23s17.%d", raw_chip_address);
-			break;
-		}
-		if (!one_regmap_config)
-			return -ENOMEM;
-
-		one_regmap_config->name = devm_kasprintf(dev, GFP_KERNEL, "%d", raw_chip_address);
-		mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
-					       one_regmap_config);
-		break;
-
-	case MCP_TYPE_S18:
-		one_regmap_config =
-			devm_kmemdup(dev, &mcp23x17_regmap,
-				sizeof(struct regmap_config), GFP_KERNEL);
-		if (!one_regmap_config)
-			return -ENOMEM;
-		mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp,
-					       one_regmap_config);
-		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;
-
-	case MCP_TYPE_018:
-		mcp->regmap = devm_regmap_init_i2c(data, &mcp23x17_regmap);
-		mcp->reg_shift = 1;
-		mcp->chip.ngpio = 16;
-		mcp->chip.label = "mcp23018";
-		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 = base;
 	mcp->chip.can_sleep = true;
 	mcp->chip.parent = dev;
@@ -816,14 +634,6 @@ static int mcp23s08_probe_one(struct mcp23s08 *mcp, struct device *dev,
 			goto fail;
 	}
 
-	if (one_regmap_config) {
-		mcp->pinctrl_desc.name = devm_kasprintf(dev, GFP_KERNEL,
-				"mcp23xxx-pinctrl.%d", raw_chip_address);
-		if (!mcp->pinctrl_desc.name)
-			return -ENOMEM;
-	} else {
-		mcp->pinctrl_desc.name = "mcp23xxx-pinctrl";
-	}
 	mcp->pinctrl_desc.pctlops = &mcp_pinctrl_ops;
 	mcp->pinctrl_desc.confops = &mcp_pinconf_ops;
 	mcp->pinctrl_desc.npins = mcp->chip.ngpio;
@@ -847,291 +657,5 @@ fail:
 		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,
-	},
-	{
-		.compatible = "microchip,mcp23018",
-		.data = (void *) MCP_TYPE_018,
-	},
-/* 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;
-
-	pdata = dev_get_platdata(&client->dev);
-	if (!pdata) {
-		pdata = &local_pdata;
-		pdata->base = -1;
-	}
-
-	mcp = devm_kzalloc(&client->dev, sizeof(*mcp), GFP_KERNEL);
-	if (!mcp)
-		return -ENOMEM;
-
-	mcp->irq = client->irq;
-	mcp->irq_chip.name = dev_name(&client->dev);
-	mcp->irq_chip.irq_mask = mcp23s08_irq_mask;
-	mcp->irq_chip.irq_unmask = mcp23s08_irq_unmask;
-	mcp->irq_chip.irq_set_type = mcp23s08_irq_set_type;
-	mcp->irq_chip.irq_bus_lock = mcp23s08_irq_bus_lock;
-	mcp->irq_chip.irq_bus_sync_unlock = mcp23s08_irq_bus_unlock;
-
-	status = mcp23s08_probe_one(mcp, &client->dev, client, client->addr,
-				    id->driver_data, pdata->base, 0);
-	if (status)
-		return status;
-
-	i2c_set_clientdata(client, mcp);
-
-	return 0;
-}
-
-static const struct i2c_device_id mcp230xx_id[] = {
-	{ "mcp23008", MCP_TYPE_008 },
-	{ "mcp23017", MCP_TYPE_017 },
-	{ "mcp23018", MCP_TYPE_018 },
-	{ },
-};
-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,
-	.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;
-
-	match = of_match_device(of_match_ptr(mcp23s08_spi_of_match), &spi->dev);
-	if (match)
-		type = (int)(uintptr_t)match->data;
-	else
-		type = spi_get_device_id(spi)->driver_data;
-
-	pdata = dev_get_platdata(&spi->dev);
-	if (!pdata) {
-		pdata = &local_pdata;
-		pdata->base = -1;
-
-		status = device_property_read_u32(&spi->dev,
-			"microchip,spi-present-mask", &pdata->spi_present_mask);
-		if (status) {
-			status = device_property_read_u32(&spi->dev,
-				"mcp,spi-present-mask",
-				&pdata->spi_present_mask);
-
-			if (status) {
-				dev_err(&spi->dev, "missing spi-present-mask");
-				return -ENODEV;
-			}
-		}
-	}
-
-	if (!pdata->spi_present_mask || pdata->spi_present_mask > 0xff) {
-		dev_err(&spi->dev, "invalid spi-present-mask");
-		return -ENODEV;
-	}
-
-	for (addr = 0; addr < MCP_MAX_DEV_PER_CS; addr++) {
-		if (pdata->spi_present_mask & BIT(addr))
-			chips++;
-	}
-
-	if (!chips)
-		return -ENODEV;
-
-	data = devm_kzalloc(&spi->dev,
-			    struct_size(data, chip, chips), GFP_KERNEL);
-	if (!data)
-		return -ENOMEM;
-
-	spi_set_drvdata(spi, data);
-
-	for (addr = 0; addr < MCP_MAX_DEV_PER_CS; addr++) {
-		if (!(pdata->spi_present_mask & BIT(addr)))
-			continue;
-		chips--;
-		data->mcp[addr] = &data->chip[chips];
-		data->mcp[addr]->irq = spi->irq;
-		data->mcp[addr]->irq_chip.name = dev_name(&spi->dev);
-		data->mcp[addr]->irq_chip.irq_mask = mcp23s08_irq_mask;
-		data->mcp[addr]->irq_chip.irq_unmask = mcp23s08_irq_unmask;
-		data->mcp[addr]->irq_chip.irq_set_type = mcp23s08_irq_set_type;
-		data->mcp[addr]->irq_chip.irq_bus_lock = mcp23s08_irq_bus_lock;
-		data->mcp[addr]->irq_chip.irq_bus_sync_unlock =
-			mcp23s08_irq_bus_unlock;
-		status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi,
-					    0x40 | (addr << 1), type,
-					    pdata->base, addr);
-		if (status < 0)
-			return status;
-
-		if (pdata->base != -1)
-			pdata->base += data->mcp[addr]->chip.ngpio;
-		ngpio += data->mcp[addr]->chip.ngpio;
-	}
-	data->ngpio = ngpio;
-
-	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,
-	.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);
-
+EXPORT_SYMBOL_GPL(mcp23s08_probe_one);
 MODULE_LICENSE("GPL");