Input: ADP5589 - new driver for I2C Keypad Decoder and I/O Expander

From http://www.analog.com/ADP5589:
The ADP5589 is an I/O port expander and keypad matrix decoder designed
for QWERTY type phones that require a large keypad matrix and expanded
I/O lines.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 771 insertions, 0 deletions

diff --git a/drivers/input/keyboard/adp5589-keys.c b/drivers/input/keyboard/adp5589-keys.c
new file mode 100644
index 00000000000..631598663aa
--- /dev/null
+++ b/drivers/input/keyboard/adp5589-keys.c
@@ -0,0 +1,771 @@
+/*
+ * Description:  keypad driver for ADP5589
+ *               I2C QWERTY Keypad and IO Expander
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2010-2011 Analog Devices Inc.
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/workqueue.h>
+#include <linux/errno.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/input.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+
+#include <linux/input/adp5589.h>
+
+/* GENERAL_CFG Register */
+#define OSC_EN          (1 << 7)
+#define CORE_CLK(x)     (((x) & 0x3) << 5)
+#define LCK_TRK_LOGIC   (1 << 4)
+#define LCK_TRK_GPI     (1 << 3)
+#define INT_CFG         (1 << 1)
+#define RST_CFG         (1 << 0)
+
+/* INT_EN Register */
+#define LOGIC2_IEN      (1 << 5)
+#define LOGIC1_IEN      (1 << 4)
+#define LOCK_IEN        (1 << 3)
+#define OVRFLOW_IEN     (1 << 2)
+#define GPI_IEN         (1 << 1)
+#define EVENT_IEN       (1 << 0)
+
+/* Interrupt Status Register */
+#define LOGIC2_INT      (1 << 5)
+#define LOGIC1_INT      (1 << 4)
+#define LOCK_INT        (1 << 3)
+#define OVRFLOW_INT     (1 << 2)
+#define GPI_INT         (1 << 1)
+#define EVENT_INT       (1 << 0)
+
+/* STATUS Register */
+
+#define LOGIC2_STAT     (1 << 7)
+#define LOGIC1_STAT     (1 << 6)
+#define LOCK_STAT       (1 << 5)
+#define KEC             0xF
+
+/* PIN_CONFIG_D Register */
+#define C4_EXTEND_CFG   (1 << 6)        /* RESET2 */
+#define R4_EXTEND_CFG   (1 << 5)        /* RESET1 */
+
+/* LOCK_CFG */
+#define LOCK_EN         (1 << 0)
+
+#define PTIME_MASK      0x3
+#define LTIME_MASK      0x3
+
+/* Key Event Register xy */
+#define KEY_EV_PRESSED          (1 << 7)
+#define KEY_EV_MASK             (0x7F)
+
+#define KEYP_MAX_EVENT          16
+
+#define MAXGPIO                 19
+#define ADP_BANK(offs)          ((offs) >> 3)
+#define ADP_BIT(offs)           (1u << ((offs) & 0x7))
+
+struct adp5589_kpad {
+        struct i2c_client *client;
+        struct input_dev *input;
+        unsigned short keycode[ADP5589_KEYMAPSIZE];
+        const struct adp5589_gpi_map *gpimap;
+        unsigned short gpimapsize;
+        unsigned extend_cfg;
+#ifdef CONFIG_GPIOLIB
+        unsigned char gpiomap[MAXGPIO];
+        bool export_gpio;
+        struct gpio_chip gc;
+        struct mutex gpio_lock; /* Protect cached dir, dat_out */
+        u8 dat_out[3];
+        u8 dir[3];
+#endif
+};
+
+static int adp5589_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 adp5589_write(struct i2c_client *client, u8 reg, u8 val)
+{
+        return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+#ifdef CONFIG_GPIOLIB
+static int adp5589_gpio_get_value(struct gpio_chip *chip, unsigned off)
+{
+        struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+        return !!(adp5589_read(kpad->client, ADP5589_GPI_STATUS_A + bank) &
+                  bit);
+}
+
+static void adp5589_gpio_set_value(struct gpio_chip *chip,
+                                   unsigned off, int val)
+{
+        struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+
+        mutex_lock(&kpad->gpio_lock);
+
+        if (val)
+                kpad->dat_out[bank] |= bit;
+        else
+                kpad->dat_out[bank] &= ~bit;
+
+        adp5589_write(kpad->client, ADP5589_GPO_DATA_OUT_A + bank,
+                      kpad->dat_out[bank]);
+
+        mutex_unlock(&kpad->gpio_lock);
+}
+
+static int adp5589_gpio_direction_input(struct gpio_chip *chip, unsigned off)
+{
+        struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+        int ret;
+
+        mutex_lock(&kpad->gpio_lock);
+
+        kpad->dir[bank] &= ~bit;
+        ret = adp5589_write(kpad->client, ADP5589_GPIO_DIRECTION_A + bank,
+                            kpad->dir[bank]);
+
+        mutex_unlock(&kpad->gpio_lock);
+
+        return ret;
+}
+
+static int adp5589_gpio_direction_output(struct gpio_chip *chip,
+                                         unsigned off, int val)
+{
+        struct adp5589_kpad *kpad = container_of(chip, struct adp5589_kpad, gc);
+        unsigned int bank = ADP_BANK(kpad->gpiomap[off]);
+        unsigned int bit = ADP_BIT(kpad->gpiomap[off]);
+        int ret;
+
+        mutex_lock(&kpad->gpio_lock);
+
+        kpad->dir[bank] |= bit;
+
+        if (val)
+                kpad->dat_out[bank] |= bit;
+        else
+                kpad->dat_out[bank] &= ~bit;
+
+        ret = adp5589_write(kpad->client, ADP5589_GPO_DATA_OUT_A + bank,
+                            kpad->dat_out[bank]);
+        ret |= adp5589_write(kpad->client, ADP5589_GPIO_DIRECTION_A + bank,
+                             kpad->dir[bank]);
+
+        mutex_unlock(&kpad->gpio_lock);
+
+        return ret;
+}
+
+static int __devinit adp5589_build_gpiomap(struct adp5589_kpad *kpad,
+                                const struct adp5589_kpad_platform_data *pdata)
+{
+        bool pin_used[MAXGPIO];
+        int n_unused = 0;
+        int i;
+
+        memset(pin_used, false, sizeof(pin_used));
+
+        for (i = 0; i < MAXGPIO; i++)
+                if (pdata->keypad_en_mask & (1 << i))
+                        pin_used[i] = true;
+
+        for (i = 0; i < kpad->gpimapsize; i++)
+                pin_used[kpad->gpimap[i].pin - ADP5589_GPI_PIN_BASE] = true;
+
+        if (kpad->extend_cfg & R4_EXTEND_CFG)
+                pin_used[4] = true;
+
+        if (kpad->extend_cfg & C4_EXTEND_CFG)
+                pin_used[12] = true;
+
+        for (i = 0; i < MAXGPIO; i++)
+                if (!pin_used[i])
+                        kpad->gpiomap[n_unused++] = i;
+
+        return n_unused;
+}
+
+static int __devinit adp5589_gpio_add(struct adp5589_kpad *kpad)
+{
+        struct device *dev = &kpad->client->dev;
+        const struct adp5589_kpad_platform_data *pdata = dev->platform_data;
+        const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
+        int i, error;
+
+        if (!gpio_data)
+                return 0;
+
+        kpad->gc.ngpio = adp5589_build_gpiomap(kpad, pdata);
+        if (kpad->gc.ngpio == 0) {
+                dev_info(dev, "No unused gpios left to export\n");
+                return 0;
+        }
+
+        kpad->export_gpio = true;
+
+        kpad->gc.direction_input = adp5589_gpio_direction_input;
+        kpad->gc.direction_output = adp5589_gpio_direction_output;
+        kpad->gc.get = adp5589_gpio_get_value;
+        kpad->gc.set = adp5589_gpio_set_value;
+        kpad->gc.can_sleep = 1;
+
+        kpad->gc.base = gpio_data->gpio_start;
+        kpad->gc.label = kpad->client->name;
+        kpad->gc.owner = THIS_MODULE;
+
+        mutex_init(&kpad->gpio_lock);
+
+        error = gpiochip_add(&kpad->gc);
+        if (error) {
+                dev_err(dev, "gpiochip_add failed, err: %d\n", error);
+                return error;
+        }
+
+        for (i = 0; i <= ADP_BANK(MAXGPIO); i++) {
+                kpad->dat_out[i] = adp5589_read(kpad->client,
+                                                ADP5589_GPO_DATA_OUT_A + i);
+                kpad->dir[i] = adp5589_read(kpad->client,
+                                            ADP5589_GPIO_DIRECTION_A + i);
+        }
+
+        if (gpio_data->setup) {
+                error = gpio_data->setup(kpad->client,
+                                         kpad->gc.base, kpad->gc.ngpio,
+                                         gpio_data->context);
+                if (error)
+                        dev_warn(dev, "setup failed, %d\n", error);
+        }
+
+        return 0;
+}
+
+static void __devexit adp5589_gpio_remove(struct adp5589_kpad *kpad)
+{
+        struct device *dev = &kpad->client->dev;
+        const struct adp5589_kpad_platform_data *pdata = dev->platform_data;
+        const struct adp5589_gpio_platform_data *gpio_data = pdata->gpio_data;
+        int error;
+
+        if (!kpad->export_gpio)
+                return;
+
+        if (gpio_data->teardown) {
+                error = gpio_data->teardown(kpad->client,
+                                            kpad->gc.base, kpad->gc.ngpio,
+                                            gpio_data->context);
+                if (error)
+                        dev_warn(dev, "teardown failed %d\n", error);
+        }
+
+        error = gpiochip_remove(&kpad->gc);
+        if (error)
+                dev_warn(dev, "gpiochip_remove failed %d\n", error);
+}
+#else
+static inline int adp5589_gpio_add(struct adp5589_kpad *kpad)
+{
+        return 0;
+}
+
+static inline void adp5589_gpio_remove(struct adp5589_kpad *kpad)
+{
+}
+#endif
+
+static void adp5589_report_switches(struct adp5589_kpad *kpad,
+                                    int key, int key_val)
+{
+        int i;
+
+        for (i = 0; i < kpad->gpimapsize; i++) {
+                if (key_val == kpad->gpimap[i].pin) {
+                        input_report_switch(kpad->input,
+                                            kpad->gpimap[i].sw_evt,
+                                            key & KEY_EV_PRESSED);
+                        break;
+                }
+        }
+}
+
+static void adp5589_report_events(struct adp5589_kpad *kpad, int ev_cnt)
+{
+        int i;
+
+        for (i = 0; i < ev_cnt; i++) {
+                int key = adp5589_read(kpad->client, ADP5589_FIFO_1 + i);
+                int key_val = key & KEY_EV_MASK;
+
+                if (key_val >= ADP5589_GPI_PIN_BASE &&
+                    key_val <= ADP5589_GPI_PIN_END) {
+                        adp5589_report_switches(kpad, key, key_val);
+                } else {
+                        input_report_key(kpad->input,
+                                         kpad->keycode[key_val - 1],
+                                         key & KEY_EV_PRESSED);
+                }
+        }
+}
+
+static irqreturn_t adp5589_irq(int irq, void *handle)
+{
+        struct adp5589_kpad *kpad = handle;
+        struct i2c_client *client = kpad->client;
+        int status, ev_cnt;
+
+        status = adp5589_read(client, ADP5589_INT_STATUS);
+
+        if (status & OVRFLOW_INT)       /* Unlikely and should never happen */
+                dev_err(&client->dev, "Event Overflow Error\n");
+
+        if (status & EVENT_INT) {
+                ev_cnt = adp5589_read(client, ADP5589_STATUS) & KEC;
+                if (ev_cnt) {
+                        adp5589_report_events(kpad, ev_cnt);
+                        input_sync(kpad->input);
+                }
+        }
+
+        adp5589_write(client, ADP5589_INT_STATUS, status);      /* Status is W1C */
+
+        return IRQ_HANDLED;
+}
+
+static int __devinit adp5589_get_evcode(struct adp5589_kpad *kpad, unsigned short key)
+{
+        int i;
+
+        for (i = 0; i < ADP5589_KEYMAPSIZE; i++)
+                if (key == kpad->keycode[i])
+                        return (i + 1) | KEY_EV_PRESSED;
+
+        dev_err(&kpad->client->dev, "RESET/UNLOCK key not in keycode map\n");
+
+        return -EINVAL;
+}
+
+static int __devinit adp5589_setup(struct adp5589_kpad *kpad)
+{
+        struct i2c_client *client = kpad->client;
+        const struct adp5589_kpad_platform_data *pdata =
+            client->dev.platform_data;
+        int i, ret;
+        unsigned char evt_mode1 = 0, evt_mode2 = 0, evt_mode3 = 0;
+        unsigned char pull_mask = 0;
+
+        ret = adp5589_write(client, ADP5589_PIN_CONFIG_A,
+                            pdata->keypad_en_mask & 0xFF);
+        ret |= adp5589_write(client, ADP5589_PIN_CONFIG_B,
+                             (pdata->keypad_en_mask >> 8) & 0xFF);
+        ret |= adp5589_write(client, ADP5589_PIN_CONFIG_C,
+                             (pdata->keypad_en_mask >> 16) & 0xFF);
+
+        if (pdata->en_keylock) {
+                ret |= adp5589_write(client, ADP5589_UNLOCK1,
+                                     pdata->unlock_key1);
+                ret |= adp5589_write(client, ADP5589_UNLOCK2,
+                                     pdata->unlock_key2);
+                ret |= adp5589_write(client, ADP5589_UNLOCK_TIMERS,
+                                     pdata->unlock_timer & LTIME_MASK);
+                ret |= adp5589_write(client, ADP5589_LOCK_CFG, LOCK_EN);
+        }
+
+        for (i = 0; i < KEYP_MAX_EVENT; i++)
+                ret |= adp5589_read(client, ADP5589_FIFO_1 + i);
+
+        for (i = 0; i < pdata->gpimapsize; i++) {
+                unsigned short pin = pdata->gpimap[i].pin;
+
+                if (pin <= ADP5589_GPI_PIN_ROW_END) {
+                        evt_mode1 |= (1 << (pin - ADP5589_GPI_PIN_ROW_BASE));
+                } else {
+                        evt_mode2 |=
+                            ((1 << (pin - ADP5589_GPI_PIN_COL_BASE)) & 0xFF);
+                        evt_mode3 |=
+                            ((1 << (pin - ADP5589_GPI_PIN_COL_BASE)) >> 8);
+                }
+        }
+
+        if (pdata->gpimapsize) {
+                ret |= adp5589_write(client, ADP5589_GPI_EVENT_EN_A, evt_mode1);
+                ret |= adp5589_write(client, ADP5589_GPI_EVENT_EN_B, evt_mode2);
+                ret |= adp5589_write(client, ADP5589_GPI_EVENT_EN_C, evt_mode3);
+        }
+
+        if (pdata->pull_dis_mask & pdata->pullup_en_100k &
+            pdata->pullup_en_300k & pdata->pulldown_en_300k)
+                dev_warn(&client->dev, "Conflicting pull resistor config\n");
+
+        for (i = 0; i < MAXGPIO; i++) {
+                unsigned val = 0;
+
+                if (pdata->pullup_en_300k & (1 << i))
+                        val = 0;
+                else if (pdata->pulldown_en_300k & (1 << i))
+                        val = 1;
+                else if (pdata->pullup_en_100k & (1 << i))
+                        val = 2;
+                else if (pdata->pull_dis_mask & (1 << i))
+                        val = 3;
+
+                pull_mask |= val << (2 * (i & 0x3));
+
+                if ((i & 0x3) == 0x3 || i == MAXGPIO - 1) {
+                        ret |= adp5589_write(client,
+                                             ADP5589_RPULL_CONFIG_A + (i >> 2),
+                                             pull_mask);
+                        pull_mask = 0;
+                }
+        }
+
+        if (pdata->reset1_key_1 && pdata->reset1_key_2 && pdata->reset1_key_3) {
+                ret |= adp5589_write(client, ADP5589_RESET1_EVENT_A,
+                                     adp5589_get_evcode(kpad,
+                                                        pdata->reset1_key_1));
+                ret |= adp5589_write(client, ADP5589_RESET1_EVENT_B,
+                                     adp5589_get_evcode(kpad,
+                                                        pdata->reset1_key_2));
+                ret |= adp5589_write(client, ADP5589_RESET1_EVENT_C,
+                                     adp5589_get_evcode(kpad,
+                                                        pdata->reset1_key_3));
+                kpad->extend_cfg |= R4_EXTEND_CFG;
+        }
+
+        if (pdata->reset2_key_1 && pdata->reset2_key_2) {
+                ret |= adp5589_write(client, ADP5589_RESET2_EVENT_A,
+                                     adp5589_get_evcode(kpad,
+                                                        pdata->reset2_key_1));
+                ret |= adp5589_write(client, ADP5589_RESET2_EVENT_B,
+                                     adp5589_get_evcode(kpad,
+                                                        pdata->reset2_key_2));
+                kpad->extend_cfg |= C4_EXTEND_CFG;
+        }
+
+        if (kpad->extend_cfg) {
+                ret |= adp5589_write(client, ADP5589_RESET_CFG,
+                                     pdata->reset_cfg);
+                ret |= adp5589_write(client, ADP5589_PIN_CONFIG_D,
+                                     kpad->extend_cfg);
+        }
+
+        for (i = 0; i <= ADP_BANK(MAXGPIO); i++)
+                ret |= adp5589_write(client, ADP5589_DEBOUNCE_DIS_A + i,
+                                     pdata->debounce_dis_mask >> (i * 8));
+
+        ret |= adp5589_write(client, ADP5589_POLL_PTIME_CFG,
+                             pdata->scan_cycle_time & PTIME_MASK);
+        ret |= adp5589_write(client, ADP5589_INT_STATUS, LOGIC2_INT |
+                             LOGIC1_INT | OVRFLOW_INT | LOCK_INT |
+                             GPI_INT | EVENT_INT);      /* Status is W1C */
+
+        ret |= adp5589_write(client, ADP5589_GENERAL_CFG,
+                             INT_CFG | OSC_EN | CORE_CLK(3));
+        ret |= adp5589_write(client, ADP5589_INT_EN,
+                             OVRFLOW_IEN | GPI_IEN | EVENT_IEN);
+
+        if (ret < 0) {
+                dev_err(&client->dev, "Write Error\n");
+                return ret;
+        }
+
+        return 0;
+}
+
+static void __devinit adp5589_report_switch_state(struct adp5589_kpad *kpad)
+{
+        int gpi_stat1 = adp5589_read(kpad->client, ADP5589_GPI_STATUS_A);
+        int gpi_stat2 = adp5589_read(kpad->client, ADP5589_GPI_STATUS_B);
+        int gpi_stat3 = adp5589_read(kpad->client, ADP5589_GPI_STATUS_C);
+        int gpi_stat_tmp, pin_loc;
+        int i;
+
+        for (i = 0; i < kpad->gpimapsize; i++) {
+                unsigned short pin = kpad->gpimap[i].pin;
+
+                if (pin <= ADP5589_GPI_PIN_ROW_END) {
+                        gpi_stat_tmp = gpi_stat1;
+                        pin_loc = pin - ADP5589_GPI_PIN_ROW_BASE;
+                } else if ((pin - ADP5589_GPI_PIN_COL_BASE) < 8) {
+                        gpi_stat_tmp = gpi_stat2;
+                        pin_loc = pin - ADP5589_GPI_PIN_COL_BASE;
+                } else {
+                        gpi_stat_tmp = gpi_stat3;
+                        pin_loc = pin - ADP5589_GPI_PIN_COL_BASE - 8;
+                }
+
+                if (gpi_stat_tmp < 0) {
+                        dev_err(&kpad->client->dev,
+                                "Can't read GPIO_DAT_STAT switch"
+                                " %d default to OFF\n", pin);
+                        gpi_stat_tmp = 0;
+                }
+
+                input_report_switch(kpad->input,
+                                    kpad->gpimap[i].sw_evt,
+                                    !(gpi_stat_tmp & (1 << pin_loc)));
+        }
+
+        input_sync(kpad->input);
+}
+
+static int __devinit adp5589_probe(struct i2c_client *client,
+                                   const struct i2c_device_id *id)
+{
+        struct adp5589_kpad *kpad;
+        const struct adp5589_kpad_platform_data *pdata;
+        struct input_dev *input;
+        unsigned int revid;
+        int ret, i;
+        int error;
+
+        if (!i2c_check_functionality(client->adapter,
+                                     I2C_FUNC_SMBUS_BYTE_DATA)) {
+                dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
+                return -EIO;
+        }
+
+        pdata = client->dev.platform_data;
+        if (!pdata) {
+                dev_err(&client->dev, "no platform data?\n");
+                return -EINVAL;
+        }
+
+        if (!((pdata->keypad_en_mask & 0xFF) &&
+                        (pdata->keypad_en_mask >> 8)) || !pdata->keymap) {
+                dev_err(&client->dev, "no rows, cols or keymap from pdata\n");
+                return -EINVAL;
+        }
+
+        if (pdata->keymapsize != ADP5589_KEYMAPSIZE) {
+                dev_err(&client->dev, "invalid keymapsize\n");
+                return -EINVAL;
+        }
+
+        if (!pdata->gpimap && pdata->gpimapsize) {
+                dev_err(&client->dev, "invalid gpimap from pdata\n");
+                return -EINVAL;
+        }
+
+        if (pdata->gpimapsize > ADP5589_GPIMAPSIZE_MAX) {
+                dev_err(&client->dev, "invalid gpimapsize\n");
+                return -EINVAL;
+        }
+
+        for (i = 0; i < pdata->gpimapsize; i++) {
+                unsigned short pin = pdata->gpimap[i].pin;
+
+                if (pin < ADP5589_GPI_PIN_BASE || pin > ADP5589_GPI_PIN_END) {
+                        dev_err(&client->dev, "invalid gpi pin data\n");
+                        return -EINVAL;
+                }
+
+                if ((1 << (pin - ADP5589_GPI_PIN_ROW_BASE)) &
+                                pdata->keypad_en_mask) {
+                        dev_err(&client->dev, "invalid gpi row/col data\n");
+                        return -EINVAL;
+                }
+        }
+
+        if (!client->irq) {
+                dev_err(&client->dev, "no IRQ?\n");
+                return -EINVAL;
+        }
+
+        kpad = kzalloc(sizeof(*kpad), GFP_KERNEL);
+        input = input_allocate_device();
+        if (!kpad || !input) {
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        kpad->client = client;
+        kpad->input = input;
+
+        ret = adp5589_read(client, ADP5589_ID);
+        if (ret < 0) {
+                error = ret;
+                goto err_free_mem;
+        }
+
+        revid = (u8) ret & ADP5589_DEVICE_ID_MASK;
+
+        input->name = client->name;
+        input->phys = "adp5589-keys/input0";
+        input->dev.parent = &client->dev;
+
+        input_set_drvdata(input, kpad);
+
+        input->id.bustype = BUS_I2C;
+        input->id.vendor = 0x0001;
+        input->id.product = 0x0001;
+        input->id.version = revid;
+
+        input->keycodesize = sizeof(kpad->keycode[0]);
+        input->keycodemax = pdata->keymapsize;
+        input->keycode = kpad->keycode;
+
+        memcpy(kpad->keycode, pdata->keymap,
+               pdata->keymapsize * input->keycodesize);
+
+        kpad->gpimap = pdata->gpimap;
+        kpad->gpimapsize = pdata->gpimapsize;
+
+        /* setup input device */
+        __set_bit(EV_KEY, input->evbit);
+
+        if (pdata->repeat)
+                __set_bit(EV_REP, input->evbit);
+
+        for (i = 0; i < input->keycodemax; i++)
+                __set_bit(kpad->keycode[i] & KEY_MAX, input->keybit);
+        __clear_bit(KEY_RESERVED, input->keybit);
+
+        if (kpad->gpimapsize)
+                __set_bit(EV_SW, input->evbit);
+        for (i = 0; i < kpad->gpimapsize; i++)
+                __set_bit(kpad->gpimap[i].sw_evt, input->swbit);
+
+        error = input_register_device(input);
+        if (error) {
+                dev_err(&client->dev, "unable to register input device\n");
+                goto err_free_mem;
+        }
+
+        error = request_threaded_irq(client->irq, NULL, adp5589_irq,
+                                     IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+                                     client->dev.driver->name, kpad);
+        if (error) {
+                dev_err(&client->dev, "irq %d busy?\n", client->irq);
+                goto err_unreg_dev;
+        }
+
+        error = adp5589_setup(kpad);
+        if (error)
+                goto err_free_irq;
+
+        if (kpad->gpimapsize)
+                adp5589_report_switch_state(kpad);
+
+        error = adp5589_gpio_add(kpad);
+        if (error)
+                goto err_free_irq;
+
+        device_init_wakeup(&client->dev, 1);
+        i2c_set_clientdata(client, kpad);
+
+        dev_info(&client->dev, "Rev.%d keypad, irq %d\n", revid, client->irq);
+        return 0;
+
+err_free_irq:
+        free_irq(client->irq, kpad);
+err_unreg_dev:
+        input_unregister_device(input);
+        input = NULL;
+err_free_mem:
+        input_free_device(input);
+        kfree(kpad);
+
+        return error;
+}
+
+static int __devexit adp5589_remove(struct i2c_client *client)
+{
+        struct adp5589_kpad *kpad = i2c_get_clientdata(client);
+
+        adp5589_write(client, ADP5589_GENERAL_CFG, 0);
+        free_irq(client->irq, kpad);
+        input_unregister_device(kpad->input);
+        adp5589_gpio_remove(kpad);
+        kfree(kpad);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int adp5589_suspend(struct device *dev)
+{
+        struct adp5589_kpad *kpad = dev_get_drvdata(dev);
+        struct i2c_client *client = kpad->client;
+
+        disable_irq(client->irq);
+
+        if (device_may_wakeup(&client->dev))
+                enable_irq_wake(client->irq);
+
+        return 0;
+}
+
+static int adp5589_resume(struct device *dev)
+{
+        struct adp5589_kpad *kpad = dev_get_drvdata(dev);
+        struct i2c_client *client = kpad->client;
+
+        if (device_may_wakeup(&client->dev))
+                disable_irq_wake(client->irq);
+
+        enable_irq(client->irq);
+
+        return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(adp5589_dev_pm_ops, adp5589_suspend, adp5589_resume);
+
+static const struct i2c_device_id adp5589_id[] = {
+        {"adp5589-keys", 0},
+        {}
+};
+
+MODULE_DEVICE_TABLE(i2c, adp5589_id);
+
+static struct i2c_driver adp5589_driver = {
+        .driver = {
+                .name = KBUILD_MODNAME,
+                .owner = THIS_MODULE,
+                .pm = &adp5589_dev_pm_ops,
+        },
+        .probe = adp5589_probe,
+        .remove = __devexit_p(adp5589_remove),
+        .id_table = adp5589_id,
+};
+
+static int __init adp5589_init(void)
+{
+        return i2c_add_driver(&adp5589_driver);
+}
+module_init(adp5589_init);
+
+static void __exit adp5589_exit(void)
+{
+        i2c_del_driver(&adp5589_driver);
+}
+module_exit(adp5589_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("ADP5589 Keypad driver");