gpio: reorganize drivers

Sort the gpio makefile and enforce the naming convention gpio-*.c for
gpio drivers.

v2: cleaned up filenames in Kconfig and comment blocks
v3: fixup use of BASIC_MMIO to GENERIC_GPIO for mxc

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 0 insertions, 503 deletions

diff --git a/drivers/gpio/adp5588-gpio.c b/drivers/gpio/adp5588-gpio.c
deleted file mode 100644
index 3525ad918771..000000000000
--- a/drivers/gpio/adp5588-gpio.c
+++ /dev/null
@@ -1,503 +0,0 @@
-/*
- * GPIO Chip driver for Analog Devices
- * ADP5588/ADP5587 I/O Expander and QWERTY Keypad Controller
- *
- * Copyright 2009-2010 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-
-#include <linux/i2c/adp5588.h>
-
-#define DRV_NAME	"adp5588-gpio"
-
-/*
- * Early pre 4.0 Silicon required to delay readout by at least 25ms,
- * since the Event Counter Register updated 25ms after the interrupt
- * asserted.
- */
-#define WA_DELAYED_READOUT_REVID(rev)	((rev) < 4)
-
-struct adp5588_gpio {
-	struct i2c_client *client;
-	struct gpio_chip gpio_chip;
-	struct mutex lock;	/* protect cached dir, dat_out */
-	/* protect serialized access to the interrupt controller bus */
-	struct mutex irq_lock;
-	unsigned gpio_start;
-	unsigned irq_base;
-	uint8_t dat_out[3];
-	uint8_t dir[3];
-	uint8_t int_lvl[3];
-	uint8_t int_en[3];
-	uint8_t irq_mask[3];
-	uint8_t irq_stat[3];
-};
-
-static int adp5588_gpio_read(struct i2c_client *client, u8 reg)
-{
-	int ret = i2c_smbus_read_byte_data(client, reg);
-
-	if (ret < 0)
-		dev_err(&client->dev, "Read Error\n");
-
-	return ret;
-}
-
-static int adp5588_gpio_write(struct i2c_client *client, u8 reg, u8 val)
-{
-	int ret = i2c_smbus_write_byte_data(client, reg, val);
-
-	if (ret < 0)
-		dev_err(&client->dev, "Write Error\n");
-
-	return ret;
-}
-
-static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off)
-{
-	struct adp5588_gpio *dev =
-	    container_of(chip, struct adp5588_gpio, gpio_chip);
-
-	return !!(adp5588_gpio_read(dev->client,
-		  GPIO_DAT_STAT1 + ADP5588_BANK(off)) & ADP5588_BIT(off));
-}
-
-static void adp5588_gpio_set_value(struct gpio_chip *chip,
-				   unsigned off, int val)
-{
-	unsigned bank, bit;
-	struct adp5588_gpio *dev =
-	    container_of(chip, struct adp5588_gpio, gpio_chip);
-
-	bank = ADP5588_BANK(off);
-	bit = ADP5588_BIT(off);
-
-	mutex_lock(&dev->lock);
-	if (val)
-		dev->dat_out[bank] |= bit;
-	else
-		dev->dat_out[bank] &= ~bit;
-
-	adp5588_gpio_write(dev->client, GPIO_DAT_OUT1 + bank,
-			   dev->dat_out[bank]);
-	mutex_unlock(&dev->lock);
-}
-
-static int adp5588_gpio_direction_input(struct gpio_chip *chip, unsigned off)
-{
-	int ret;
-	unsigned bank;
-	struct adp5588_gpio *dev =
-	    container_of(chip, struct adp5588_gpio, gpio_chip);
-
-	bank = ADP5588_BANK(off);
-
-	mutex_lock(&dev->lock);
-	dev->dir[bank] &= ~ADP5588_BIT(off);
-	ret = adp5588_gpio_write(dev->client, GPIO_DIR1 + bank, dev->dir[bank]);
-	mutex_unlock(&dev->lock);
-
-	return ret;
-}
-
-static int adp5588_gpio_direction_output(struct gpio_chip *chip,
-					 unsigned off, int val)
-{
-	int ret;
-	unsigned bank, bit;
-	struct adp5588_gpio *dev =
-	    container_of(chip, struct adp5588_gpio, gpio_chip);
-
-	bank = ADP5588_BANK(off);
-	bit = ADP5588_BIT(off);
-
-	mutex_lock(&dev->lock);
-	dev->dir[bank] |= bit;
-
-	if (val)
-		dev->dat_out[bank] |= bit;
-	else
-		dev->dat_out[bank] &= ~bit;
-
-	ret = adp5588_gpio_write(dev->client, GPIO_DAT_OUT1 + bank,
-				 dev->dat_out[bank]);
-	ret |= adp5588_gpio_write(dev->client, GPIO_DIR1 + bank,
-				 dev->dir[bank]);
-	mutex_unlock(&dev->lock);
-
-	return ret;
-}
-
-#ifdef CONFIG_GPIO_ADP5588_IRQ
-static int adp5588_gpio_to_irq(struct gpio_chip *chip, unsigned off)
-{
-	struct adp5588_gpio *dev =
-		container_of(chip, struct adp5588_gpio, gpio_chip);
-	return dev->irq_base + off;
-}
-
-static void adp5588_irq_bus_lock(struct irq_data *d)
-{
-	struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
-
-	mutex_lock(&dev->irq_lock);
-}
-
- /*
-  * genirq core code can issue chip->mask/unmask from atomic context.
-  * This doesn't work for slow busses where an access needs to sleep.
-  * bus_sync_unlock() is therefore called outside the atomic context,
-  * syncs the current irq mask state with the slow external controller
-  * and unlocks the bus.
-  */
-
-static void adp5588_irq_bus_sync_unlock(struct irq_data *d)
-{
-	struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
-	int i;
-
-	for (i = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++)
-		if (dev->int_en[i] ^ dev->irq_mask[i]) {
-			dev->int_en[i] = dev->irq_mask[i];
-			adp5588_gpio_write(dev->client, GPIO_INT_EN1 + i,
-					   dev->int_en[i]);
-		}
-
-	mutex_unlock(&dev->irq_lock);
-}
-
-static void adp5588_irq_mask(struct irq_data *d)
-{
-	struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
-	unsigned gpio = d->irq - dev->irq_base;
-
-	dev->irq_mask[ADP5588_BANK(gpio)] &= ~ADP5588_BIT(gpio);
-}
-
-static void adp5588_irq_unmask(struct irq_data *d)
-{
-	struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
-	unsigned gpio = d->irq - dev->irq_base;
-
-	dev->irq_mask[ADP5588_BANK(gpio)] |= ADP5588_BIT(gpio);
-}
-
-static int adp5588_irq_set_type(struct irq_data *d, unsigned int type)
-{
-	struct adp5588_gpio *dev = irq_data_get_irq_chip_data(d);
-	uint16_t gpio = d->irq - dev->irq_base;
-	unsigned bank, bit;
-
-	if ((type & IRQ_TYPE_EDGE_BOTH)) {
-		dev_err(&dev->client->dev, "irq %d: unsupported type %d\n",
-			d->irq, type);
-		return -EINVAL;
-	}
-
-	bank = ADP5588_BANK(gpio);
-	bit = ADP5588_BIT(gpio);
-
-	if (type & IRQ_TYPE_LEVEL_HIGH)
-		dev->int_lvl[bank] |= bit;
-	else if (type & IRQ_TYPE_LEVEL_LOW)
-		dev->int_lvl[bank] &= ~bit;
-	else
-		return -EINVAL;
-
-	adp5588_gpio_direction_input(&dev->gpio_chip, gpio);
-	adp5588_gpio_write(dev->client, GPIO_INT_LVL1 + bank,
-			   dev->int_lvl[bank]);
-
-	return 0;
-}
-
-static struct irq_chip adp5588_irq_chip = {
-	.name			= "adp5588",
-	.irq_mask		= adp5588_irq_mask,
-	.irq_unmask		= adp5588_irq_unmask,
-	.irq_bus_lock		= adp5588_irq_bus_lock,
-	.irq_bus_sync_unlock	= adp5588_irq_bus_sync_unlock,
-	.irq_set_type		= adp5588_irq_set_type,
-};
-
-static int adp5588_gpio_read_intstat(struct i2c_client *client, u8 *buf)
-{
-	int ret = i2c_smbus_read_i2c_block_data(client, GPIO_INT_STAT1, 3, buf);
-
-	if (ret < 0)
-		dev_err(&client->dev, "Read INT_STAT Error\n");
-
-	return ret;
-}
-
-static irqreturn_t adp5588_irq_handler(int irq, void *devid)
-{
-	struct adp5588_gpio *dev = devid;
-	unsigned status, bank, bit, pending;
-	int ret;
-	status = adp5588_gpio_read(dev->client, INT_STAT);
-
-	if (status & ADP5588_GPI_INT) {
-		ret = adp5588_gpio_read_intstat(dev->client, dev->irq_stat);
-		if (ret < 0)
-			memset(dev->irq_stat, 0, ARRAY_SIZE(dev->irq_stat));
-
-		for (bank = 0; bank <= ADP5588_BANK(ADP5588_MAXGPIO);
-			bank++, bit = 0) {
-			pending = dev->irq_stat[bank] & dev->irq_mask[bank];
-
-			while (pending) {
-				if (pending & (1 << bit)) {
-					handle_nested_irq(dev->irq_base +
-							  (bank << 3) + bit);
-					pending &= ~(1 << bit);
-
-				}
-				bit++;
-			}
-		}
-	}
-
-	adp5588_gpio_write(dev->client, INT_STAT, status); /* Status is W1C */
-
-	return IRQ_HANDLED;
-}
-
-static int adp5588_irq_setup(struct adp5588_gpio *dev)
-{
-	struct i2c_client *client = dev->client;
-	struct adp5588_gpio_platform_data *pdata = client->dev.platform_data;
-	unsigned gpio;
-	int ret;
-
-	adp5588_gpio_write(client, CFG, ADP5588_AUTO_INC);
-	adp5588_gpio_write(client, INT_STAT, -1); /* status is W1C */
-	adp5588_gpio_read_intstat(client, dev->irq_stat); /* read to clear */
-
-	dev->irq_base = pdata->irq_base;
-	mutex_init(&dev->irq_lock);
-
-	for (gpio = 0; gpio < dev->gpio_chip.ngpio; gpio++) {
-		int irq = gpio + dev->irq_base;
-		irq_set_chip_data(irq, dev);
-		irq_set_chip_and_handler(irq, &adp5588_irq_chip,
-					 handle_level_irq);
-		irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
-		/*
-		 * ARM needs us to explicitly flag the IRQ as VALID,
-		 * once we do so, it will also set the noprobe.
-		 */
-		set_irq_flags(irq, IRQF_VALID);
-#else
-		irq_set_noprobe(irq);
-#endif
-	}
-
-	ret = request_threaded_irq(client->irq,
-				   NULL,
-				   adp5588_irq_handler,
-				   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-				   dev_name(&client->dev), dev);
-	if (ret) {
-		dev_err(&client->dev, "failed to request irq %d\n",
-			client->irq);
-		goto out;
-	}
-
-	dev->gpio_chip.to_irq = adp5588_gpio_to_irq;
-	adp5588_gpio_write(client, CFG,
-		ADP5588_AUTO_INC | ADP5588_INT_CFG | ADP5588_GPI_INT);
-
-	return 0;
-
-out:
-	dev->irq_base = 0;
-	return ret;
-}
-
-static void adp5588_irq_teardown(struct adp5588_gpio *dev)
-{
-	if (dev->irq_base)
-		free_irq(dev->client->irq, dev);
-}
-
-#else
-static int adp5588_irq_setup(struct adp5588_gpio *dev)
-{
-	struct i2c_client *client = dev->client;
-	dev_warn(&client->dev, "interrupt support not compiled in\n");
-
-	return 0;
-}
-
-static void adp5588_irq_teardown(struct adp5588_gpio *dev)
-{
-}
-#endif /* CONFIG_GPIO_ADP5588_IRQ */
-
-static int __devinit adp5588_gpio_probe(struct i2c_client *client,
-					const struct i2c_device_id *id)
-{
-	struct adp5588_gpio_platform_data *pdata = client->dev.platform_data;
-	struct adp5588_gpio *dev;
-	struct gpio_chip *gc;
-	int ret, i, revid;
-
-	if (pdata == NULL) {
-		dev_err(&client->dev, "missing platform data\n");
-		return -ENODEV;
-	}
-
-	if (!i2c_check_functionality(client->adapter,
-					I2C_FUNC_SMBUS_BYTE_DATA)) {
-		dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
-		return -EIO;
-	}
-
-	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-	if (dev == NULL) {
-		dev_err(&client->dev, "failed to alloc memory\n");
-		return -ENOMEM;
-	}
-
-	dev->client = client;
-
-	gc = &dev->gpio_chip;
-	gc->direction_input = adp5588_gpio_direction_input;
-	gc->direction_output = adp5588_gpio_direction_output;
-	gc->get = adp5588_gpio_get_value;
-	gc->set = adp5588_gpio_set_value;
-	gc->can_sleep = 1;
-
-	gc->base = pdata->gpio_start;
-	gc->ngpio = ADP5588_MAXGPIO;
-	gc->label = client->name;
-	gc->owner = THIS_MODULE;
-
-	mutex_init(&dev->lock);
-
-	ret = adp5588_gpio_read(dev->client, DEV_ID);
-	if (ret < 0)
-		goto err;
-
-	revid = ret & ADP5588_DEVICE_ID_MASK;
-
-	for (i = 0, ret = 0; i <= ADP5588_BANK(ADP5588_MAXGPIO); i++) {
-		dev->dat_out[i] = adp5588_gpio_read(client, GPIO_DAT_OUT1 + i);
-		dev->dir[i] = adp5588_gpio_read(client, GPIO_DIR1 + i);
-		ret |= adp5588_gpio_write(client, KP_GPIO1 + i, 0);
-		ret |= adp5588_gpio_write(client, GPIO_PULL1 + i,
-				(pdata->pullup_dis_mask >> (8 * i)) & 0xFF);
-		ret |= adp5588_gpio_write(client, GPIO_INT_EN1 + i, 0);
-		if (ret)
-			goto err;
-	}
-
-	if (pdata->irq_base) {
-		if (WA_DELAYED_READOUT_REVID(revid)) {
-			dev_warn(&client->dev, "GPIO int not supported\n");
-		} else {
-			ret = adp5588_irq_setup(dev);
-			if (ret)
-				goto err;
-		}
-	}
-
-	ret = gpiochip_add(&dev->gpio_chip);
-	if (ret)
-		goto err_irq;
-
-	dev_info(&client->dev, "gpios %d..%d (IRQ Base %d) on a %s Rev. %d\n",
-			gc->base, gc->base + gc->ngpio - 1,
-			pdata->irq_base, client->name, revid);
-
-	if (pdata->setup) {
-		ret = pdata->setup(client, gc->base, gc->ngpio, pdata->context);
-		if (ret < 0)
-			dev_warn(&client->dev, "setup failed, %d\n", ret);
-	}
-
-	i2c_set_clientdata(client, dev);
-
-	return 0;
-
-err_irq:
-	adp5588_irq_teardown(dev);
-err:
-	kfree(dev);
-	return ret;
-}
-
-static int __devexit adp5588_gpio_remove(struct i2c_client *client)
-{
-	struct adp5588_gpio_platform_data *pdata = client->dev.platform_data;
-	struct adp5588_gpio *dev = i2c_get_clientdata(client);
-	int ret;
-
-	if (pdata->teardown) {
-		ret = pdata->teardown(client,
-				      dev->gpio_chip.base, dev->gpio_chip.ngpio,
-				      pdata->context);
-		if (ret < 0) {
-			dev_err(&client->dev, "teardown failed %d\n", ret);
-			return ret;
-		}
-	}
-
-	if (dev->irq_base)
-		free_irq(dev->client->irq, dev);
-
-	ret = gpiochip_remove(&dev->gpio_chip);
-	if (ret) {
-		dev_err(&client->dev, "gpiochip_remove failed %d\n", ret);
-		return ret;
-	}
-
-	kfree(dev);
-	return 0;
-}
-
-static const struct i2c_device_id adp5588_gpio_id[] = {
-	{DRV_NAME, 0},
-	{}
-};
-
-MODULE_DEVICE_TABLE(i2c, adp5588_gpio_id);
-
-static struct i2c_driver adp5588_gpio_driver = {
-	.driver = {
-		   .name = DRV_NAME,
-		   },
-	.probe = adp5588_gpio_probe,
-	.remove = __devexit_p(adp5588_gpio_remove),
-	.id_table = adp5588_gpio_id,
-};
-
-static int __init adp5588_gpio_init(void)
-{
-	return i2c_add_driver(&adp5588_gpio_driver);
-}
-
-module_init(adp5588_gpio_init);
-
-static void __exit adp5588_gpio_exit(void)
-{
-	i2c_del_driver(&adp5588_gpio_driver);
-}
-
-module_exit(adp5588_gpio_exit);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("GPIO ADP5588 Driver");
-MODULE_LICENSE("GPL");