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path: root/drivers/gpio/adp5588-gpio.c
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Diffstat (limited to 'drivers/gpio/adp5588-gpio.c')
-rw-r--r--drivers/gpio/adp5588-gpio.c267
1 files changed, 0 insertions, 267 deletions
diff --git a/drivers/gpio/adp5588-gpio.c b/drivers/gpio/adp5588-gpio.c
deleted file mode 100644
index 2e8e9e24f88..00000000000
--- a/drivers/gpio/adp5588-gpio.c
+++ /dev/null
@@ -1,267 +0,0 @@
-/*
- * GPIO Chip driver for Analog Devices
- * ADP5588 I/O Expander and QWERTY Keypad Controller
- *
- * Copyright 2009 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/i2c/adp5588.h>
-
-#define DRV_NAME "adp5588-gpio"
-#define MAXGPIO 18
-#define ADP_BANK(offs) ((offs) >> 3)
-#define ADP_BIT(offs) (1u << ((offs) & 0x7))
-
-struct adp5588_gpio {
- struct i2c_client *client;
- struct gpio_chip gpio_chip;
- struct mutex lock; /* protect cached dir, dat_out */
- unsigned gpio_start;
- uint8_t dat_out[3];
- uint8_t dir[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 + ADP_BANK(off))
- & ADP_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 = ADP_BANK(off);
- bit = ADP_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 = ADP_BANK(off);
-
- mutex_lock(&dev->lock);
- dev->dir[bank] &= ~ADP_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 = ADP_BANK(off);
- bit = ADP_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;
-}
-
-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 = 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 <= ADP_BANK(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);
-
- if (ret)
- goto err;
- }
-
- ret = gpiochip_add(&dev->gpio_chip);
- if (ret)
- goto err;
-
- dev_info(&client->dev, "gpios %d..%d on a %s Rev. %d\n",
- gc->base, gc->base + gc->ngpio - 1,
- 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:
- 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;
- }
- }
-
- 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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-07 22:46:23 +0000