summaryrefslogtreecommitdiff
path: root/drivers/gpio/adp5588-gpio.c
diff options
context:
space:
mode:
authorGrant Likely <grant.likely@secretlab.ca>2011-06-04 18:38:28 -0600
committerGrant Likely <grant.likely@secretlab.ca>2011-06-06 10:10:11 -0600
commitc103de240439dfee24ac50eb99c8be3a30d13323 (patch)
tree014eeda779510d7d3dfabd1183ce7f1a288d367b /drivers/gpio/adp5588-gpio.c
parent8c31b1635b91e48f867e010cd7bcd06393e5858a (diff)
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>
Diffstat (limited to 'drivers/gpio/adp5588-gpio.c')
-rw-r--r--drivers/gpio/adp5588-gpio.c503
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");