diff options
Diffstat (limited to 'drivers/mfd/ab3100-core.c')
| -rw-r--r-- | drivers/mfd/ab3100-core.c | 1019 |
1 files changed, 1019 insertions, 0 deletions
diff --git a/drivers/mfd/ab3100-core.c b/drivers/mfd/ab3100-core.c new file mode 100644 index 00000000..1efad20f --- /dev/null +++ b/drivers/mfd/ab3100-core.c @@ -0,0 +1,1019 @@ +/* + * Copyright (C) 2007-2010 ST-Ericsson + * License terms: GNU General Public License (GPL) version 2 + * Low-level core for exclusive access to the AB3100 IC on the I2C bus + * and some basic chip-configuration. + * Author: Linus Walleij <linus.walleij@stericsson.com> + */ + +#include <linux/i2c.h> +#include <linux/mutex.h> +#include <linux/list.h> +#include <linux/notifier.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/device.h> +#include <linux/interrupt.h> +#include <linux/random.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/uaccess.h> +#include <linux/mfd/core.h> +#include <linux/mfd/abx500.h> + +/* These are the only registers inside AB3100 used in this main file */ + +/* Interrupt event registers */ +#define AB3100_EVENTA1 0x21 +#define AB3100_EVENTA2 0x22 +#define AB3100_EVENTA3 0x23 + +/* AB3100 DAC converter registers */ +#define AB3100_DIS 0x00 +#define AB3100_D0C 0x01 +#define AB3100_D1C 0x02 +#define AB3100_D2C 0x03 +#define AB3100_D3C 0x04 + +/* Chip ID register */ +#define AB3100_CID 0x20 + +/* AB3100 interrupt registers */ +#define AB3100_IMRA1 0x24 +#define AB3100_IMRA2 0x25 +#define AB3100_IMRA3 0x26 +#define AB3100_IMRB1 0x2B +#define AB3100_IMRB2 0x2C +#define AB3100_IMRB3 0x2D + +/* System Power Monitoring and control registers */ +#define AB3100_MCA 0x2E +#define AB3100_MCB 0x2F + +/* SIM power up */ +#define AB3100_SUP 0x50 + +/* + * I2C communication + * + * The AB3100 is usually assigned address 0x48 (7-bit) + * The chip is defined in the platform i2c_board_data section. + */ +static int ab3100_get_chip_id(struct device *dev) +{ + struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); + + return (int)ab3100->chip_id; +} + +static int ab3100_set_register_interruptible(struct ab3100 *ab3100, + u8 reg, u8 regval) +{ + u8 regandval[2] = {reg, regval}; + int err; + + err = mutex_lock_interruptible(&ab3100->access_mutex); + if (err) + return err; + + /* + * A two-byte write message with the first byte containing the register + * number and the second byte containing the value to be written + * effectively sets a register in the AB3100. + */ + err = i2c_master_send(ab3100->i2c_client, regandval, 2); + if (err < 0) { + dev_err(ab3100->dev, + "write error (write register): %d\n", + err); + } else if (err != 2) { + dev_err(ab3100->dev, + "write error (write register) " + "%d bytes transferred (expected 2)\n", + err); + err = -EIO; + } else { + /* All is well */ + err = 0; + } + mutex_unlock(&ab3100->access_mutex); + return err; +} + +static int set_register_interruptible(struct device *dev, + u8 bank, u8 reg, u8 value) +{ + struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); + + return ab3100_set_register_interruptible(ab3100, reg, value); +} + +/* + * The test registers exist at an I2C bus address up one + * from the ordinary base. They are not supposed to be used + * in production code, but sometimes you have to do that + * anyway. It's currently only used from this file so declare + * it static and do not export. + */ +static int ab3100_set_test_register_interruptible(struct ab3100 *ab3100, + u8 reg, u8 regval) +{ + u8 regandval[2] = {reg, regval}; + int err; + + err = mutex_lock_interruptible(&ab3100->access_mutex); + if (err) + return err; + + err = i2c_master_send(ab3100->testreg_client, regandval, 2); + if (err < 0) { + dev_err(ab3100->dev, + "write error (write test register): %d\n", + err); + } else if (err != 2) { + dev_err(ab3100->dev, + "write error (write test register) " + "%d bytes transferred (expected 2)\n", + err); + err = -EIO; + } else { + /* All is well */ + err = 0; + } + mutex_unlock(&ab3100->access_mutex); + + return err; +} + +static int ab3100_get_register_interruptible(struct ab3100 *ab3100, + u8 reg, u8 *regval) +{ + int err; + + err = mutex_lock_interruptible(&ab3100->access_mutex); + if (err) + return err; + + /* + * AB3100 require an I2C "stop" command between each message, else + * it will not work. The only way of achieveing this with the + * message transport layer is to send the read and write messages + * separately. + */ + err = i2c_master_send(ab3100->i2c_client, ®, 1); + if (err < 0) { + dev_err(ab3100->dev, + "write error (send register address): %d\n", + err); + goto get_reg_out_unlock; + } else if (err != 1) { + dev_err(ab3100->dev, + "write error (send register address) " + "%d bytes transferred (expected 1)\n", + err); + err = -EIO; + goto get_reg_out_unlock; + } else { + /* All is well */ + err = 0; + } + + err = i2c_master_recv(ab3100->i2c_client, regval, 1); + if (err < 0) { + dev_err(ab3100->dev, + "write error (read register): %d\n", + err); + goto get_reg_out_unlock; + } else if (err != 1) { + dev_err(ab3100->dev, + "write error (read register) " + "%d bytes transferred (expected 1)\n", + err); + err = -EIO; + goto get_reg_out_unlock; + } else { + /* All is well */ + err = 0; + } + + get_reg_out_unlock: + mutex_unlock(&ab3100->access_mutex); + return err; +} + +static int get_register_interruptible(struct device *dev, u8 bank, u8 reg, + u8 *value) +{ + struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); + + return ab3100_get_register_interruptible(ab3100, reg, value); +} + +static int ab3100_get_register_page_interruptible(struct ab3100 *ab3100, + u8 first_reg, u8 *regvals, u8 numregs) +{ + int err; + + if (ab3100->chip_id == 0xa0 || + ab3100->chip_id == 0xa1) + /* These don't support paged reads */ + return -EIO; + + err = mutex_lock_interruptible(&ab3100->access_mutex); + if (err) + return err; + + /* + * Paged read also require an I2C "stop" command. + */ + err = i2c_master_send(ab3100->i2c_client, &first_reg, 1); + if (err < 0) { + dev_err(ab3100->dev, + "write error (send first register address): %d\n", + err); + goto get_reg_page_out_unlock; + } else if (err != 1) { + dev_err(ab3100->dev, + "write error (send first register address) " + "%d bytes transferred (expected 1)\n", + err); + err = -EIO; + goto get_reg_page_out_unlock; + } + + err = i2c_master_recv(ab3100->i2c_client, regvals, numregs); + if (err < 0) { + dev_err(ab3100->dev, + "write error (read register page): %d\n", + err); + goto get_reg_page_out_unlock; + } else if (err != numregs) { + dev_err(ab3100->dev, + "write error (read register page) " + "%d bytes transferred (expected %d)\n", + err, numregs); + err = -EIO; + goto get_reg_page_out_unlock; + } + + /* All is well */ + err = 0; + + get_reg_page_out_unlock: + mutex_unlock(&ab3100->access_mutex); + return err; +} + +static int get_register_page_interruptible(struct device *dev, u8 bank, + u8 first_reg, u8 *regvals, u8 numregs) +{ + struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); + + return ab3100_get_register_page_interruptible(ab3100, + first_reg, regvals, numregs); +} + +static int ab3100_mask_and_set_register_interruptible(struct ab3100 *ab3100, + u8 reg, u8 andmask, u8 ormask) +{ + u8 regandval[2] = {reg, 0}; + int err; + + err = mutex_lock_interruptible(&ab3100->access_mutex); + if (err) + return err; + + /* First read out the target register */ + err = i2c_master_send(ab3100->i2c_client, ®, 1); + if (err < 0) { + dev_err(ab3100->dev, + "write error (maskset send address): %d\n", + err); + goto get_maskset_unlock; + } else if (err != 1) { + dev_err(ab3100->dev, + "write error (maskset send address) " + "%d bytes transferred (expected 1)\n", + err); + err = -EIO; + goto get_maskset_unlock; + } + + err = i2c_master_recv(ab3100->i2c_client, ®andval[1], 1); + if (err < 0) { + dev_err(ab3100->dev, + "write error (maskset read register): %d\n", + err); + goto get_maskset_unlock; + } else if (err != 1) { + dev_err(ab3100->dev, + "write error (maskset read register) " + "%d bytes transferred (expected 1)\n", + err); + err = -EIO; + goto get_maskset_unlock; + } + + /* Modify the register */ + regandval[1] &= andmask; + regandval[1] |= ormask; + + /* Write the register */ + err = i2c_master_send(ab3100->i2c_client, regandval, 2); + if (err < 0) { + dev_err(ab3100->dev, + "write error (write register): %d\n", + err); + goto get_maskset_unlock; + } else if (err != 2) { + dev_err(ab3100->dev, + "write error (write register) " + "%d bytes transferred (expected 2)\n", + err); + err = -EIO; + goto get_maskset_unlock; + } + + /* All is well */ + err = 0; + + get_maskset_unlock: + mutex_unlock(&ab3100->access_mutex); + return err; +} + +static int mask_and_set_register_interruptible(struct device *dev, u8 bank, + u8 reg, u8 bitmask, u8 bitvalues) +{ + struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); + + return ab3100_mask_and_set_register_interruptible(ab3100, + reg, bitmask, (bitmask & bitvalues)); +} + +/* + * Register a simple callback for handling any AB3100 events. + */ +int ab3100_event_register(struct ab3100 *ab3100, + struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&ab3100->event_subscribers, + nb); +} +EXPORT_SYMBOL(ab3100_event_register); + +/* + * Remove a previously registered callback. + */ +int ab3100_event_unregister(struct ab3100 *ab3100, + struct notifier_block *nb) +{ + return blocking_notifier_chain_unregister(&ab3100->event_subscribers, + nb); +} +EXPORT_SYMBOL(ab3100_event_unregister); + + +static int ab3100_event_registers_startup_state_get(struct device *dev, + u8 *event) +{ + struct ab3100 *ab3100 = dev_get_drvdata(dev->parent); + if (!ab3100->startup_events_read) + return -EAGAIN; /* Try again later */ + memcpy(event, ab3100->startup_events, 3); + return 0; +} + +static struct abx500_ops ab3100_ops = { + .get_chip_id = ab3100_get_chip_id, + .set_register = set_register_interruptible, + .get_register = get_register_interruptible, + .get_register_page = get_register_page_interruptible, + .set_register_page = NULL, + .mask_and_set_register = mask_and_set_register_interruptible, + .event_registers_startup_state_get = + ab3100_event_registers_startup_state_get, + .startup_irq_enabled = NULL, +}; + +/* + * This is a threaded interrupt handler so we can make some + * I2C calls etc. + */ +static irqreturn_t ab3100_irq_handler(int irq, void *data) +{ + struct ab3100 *ab3100 = data; + u8 event_regs[3]; + u32 fatevent; + int err; + + add_interrupt_randomness(irq); + + err = ab3100_get_register_page_interruptible(ab3100, AB3100_EVENTA1, + event_regs, 3); + if (err) + goto err_event; + + fatevent = (event_regs[0] << 16) | + (event_regs[1] << 8) | + event_regs[2]; + + if (!ab3100->startup_events_read) { + ab3100->startup_events[0] = event_regs[0]; + ab3100->startup_events[1] = event_regs[1]; + ab3100->startup_events[2] = event_regs[2]; + ab3100->startup_events_read = true; + } + /* + * The notified parties will have to mask out the events + * they're interested in and react to them. They will be + * notified on all events, then they use the fatevent value + * to determine if they're interested. + */ + blocking_notifier_call_chain(&ab3100->event_subscribers, + fatevent, NULL); + + dev_dbg(ab3100->dev, + "IRQ Event: 0x%08x\n", fatevent); + + return IRQ_HANDLED; + + err_event: + dev_dbg(ab3100->dev, + "error reading event status\n"); + return IRQ_HANDLED; +} + +#ifdef CONFIG_DEBUG_FS +/* + * Some debugfs entries only exposed if we're using debug + */ +static int ab3100_registers_print(struct seq_file *s, void *p) +{ + struct ab3100 *ab3100 = s->private; + u8 value; + u8 reg; + + seq_printf(s, "AB3100 registers:\n"); + + for (reg = 0; reg < 0xff; reg++) { + ab3100_get_register_interruptible(ab3100, reg, &value); + seq_printf(s, "[0x%x]: 0x%x\n", reg, value); + } + return 0; +} + +static int ab3100_registers_open(struct inode *inode, struct file *file) +{ + return single_open(file, ab3100_registers_print, inode->i_private); +} + +static const struct file_operations ab3100_registers_fops = { + .open = ab3100_registers_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .owner = THIS_MODULE, +}; + +struct ab3100_get_set_reg_priv { + struct ab3100 *ab3100; + bool mode; +}; + +static ssize_t ab3100_get_set_reg(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ab3100_get_set_reg_priv *priv = file->private_data; + struct ab3100 *ab3100 = priv->ab3100; + char buf[32]; + ssize_t buf_size; + int regp; + unsigned long user_reg; + int err; + int i = 0; + + /* Get userspace string and assure termination */ + buf_size = min(count, (sizeof(buf)-1)); + if (copy_from_user(buf, user_buf, buf_size)) + return -EFAULT; + buf[buf_size] = 0; + + /* + * The idea is here to parse a string which is either + * "0xnn" for reading a register, or "0xaa 0xbb" for + * writing 0xbb to the register 0xaa. First move past + * whitespace and then begin to parse the register. + */ + while ((i < buf_size) && (buf[i] == ' ')) + i++; + regp = i; + + /* + * Advance pointer to end of string then terminate + * the register string. This is needed to satisfy + * the strict_strtoul() function. + */ + while ((i < buf_size) && (buf[i] != ' ')) + i++; + buf[i] = '\0'; + + err = strict_strtoul(&buf[regp], 16, &user_reg); + if (err) + return err; + if (user_reg > 0xff) + return -EINVAL; + + /* Either we read or we write a register here */ + if (!priv->mode) { + /* Reading */ + u8 reg = (u8) user_reg; + u8 regvalue; + + ab3100_get_register_interruptible(ab3100, reg, ®value); + + dev_info(ab3100->dev, + "debug read AB3100 reg[0x%02x]: 0x%02x\n", + reg, regvalue); + } else { + int valp; + unsigned long user_value; + u8 reg = (u8) user_reg; + u8 value; + u8 regvalue; + + /* + * Writing, we need some value to write to + * the register so keep parsing the string + * from userspace. + */ + i++; + while ((i < buf_size) && (buf[i] == ' ')) + i++; + valp = i; + while ((i < buf_size) && (buf[i] != ' ')) + i++; + buf[i] = '\0'; + + err = strict_strtoul(&buf[valp], 16, &user_value); + if (err) + return err; + if (user_reg > 0xff) + return -EINVAL; + + value = (u8) user_value; + ab3100_set_register_interruptible(ab3100, reg, value); + ab3100_get_register_interruptible(ab3100, reg, ®value); + + dev_info(ab3100->dev, + "debug write reg[0x%02x] with 0x%02x, " + "after readback: 0x%02x\n", + reg, value, regvalue); + } + return buf_size; +} + +static const struct file_operations ab3100_get_set_reg_fops = { + .open = simple_open, + .write = ab3100_get_set_reg, + .llseek = noop_llseek, +}; + +static struct dentry *ab3100_dir; +static struct dentry *ab3100_reg_file; +static struct ab3100_get_set_reg_priv ab3100_get_priv; +static struct dentry *ab3100_get_reg_file; +static struct ab3100_get_set_reg_priv ab3100_set_priv; +static struct dentry *ab3100_set_reg_file; + +static void ab3100_setup_debugfs(struct ab3100 *ab3100) +{ + int err; + + ab3100_dir = debugfs_create_dir("ab3100", NULL); + if (!ab3100_dir) + goto exit_no_debugfs; + + ab3100_reg_file = debugfs_create_file("registers", + S_IRUGO, ab3100_dir, ab3100, + &ab3100_registers_fops); + if (!ab3100_reg_file) { + err = -ENOMEM; + goto exit_destroy_dir; + } + + ab3100_get_priv.ab3100 = ab3100; + ab3100_get_priv.mode = false; + ab3100_get_reg_file = debugfs_create_file("get_reg", + S_IWUSR, ab3100_dir, &ab3100_get_priv, + &ab3100_get_set_reg_fops); + if (!ab3100_get_reg_file) { + err = -ENOMEM; + goto exit_destroy_reg; + } + + ab3100_set_priv.ab3100 = ab3100; + ab3100_set_priv.mode = true; + ab3100_set_reg_file = debugfs_create_file("set_reg", + S_IWUSR, ab3100_dir, &ab3100_set_priv, + &ab3100_get_set_reg_fops); + if (!ab3100_set_reg_file) { + err = -ENOMEM; + goto exit_destroy_get_reg; + } + return; + + exit_destroy_get_reg: + debugfs_remove(ab3100_get_reg_file); + exit_destroy_reg: + debugfs_remove(ab3100_reg_file); + exit_destroy_dir: + debugfs_remove(ab3100_dir); + exit_no_debugfs: + return; +} +static inline void ab3100_remove_debugfs(void) +{ + debugfs_remove(ab3100_set_reg_file); + debugfs_remove(ab3100_get_reg_file); + debugfs_remove(ab3100_reg_file); + debugfs_remove(ab3100_dir); +} +#else +static inline void ab3100_setup_debugfs(struct ab3100 *ab3100) +{ +} +static inline void ab3100_remove_debugfs(void) +{ +} +#endif + +/* + * Basic set-up, datastructure creation/destruction and I2C interface. + * This sets up a default config in the AB3100 chip so that it + * will work as expected. + */ + +struct ab3100_init_setting { + u8 abreg; + u8 setting; +}; + +static const struct ab3100_init_setting __devinitconst +ab3100_init_settings[] = { + { + .abreg = AB3100_MCA, + .setting = 0x01 + }, { + .abreg = AB3100_MCB, + .setting = 0x30 + }, { + .abreg = AB3100_IMRA1, + .setting = 0x00 + }, { + .abreg = AB3100_IMRA2, + .setting = 0xFF + }, { + .abreg = AB3100_IMRA3, + .setting = 0x01 + }, { + .abreg = AB3100_IMRB1, + .setting = 0xBF + }, { + .abreg = AB3100_IMRB2, + .setting = 0xFF + }, { + .abreg = AB3100_IMRB3, + .setting = 0xFF + }, { + .abreg = AB3100_SUP, + .setting = 0x00 + }, { + .abreg = AB3100_DIS, + .setting = 0xF0 + }, { + .abreg = AB3100_D0C, + .setting = 0x00 + }, { + .abreg = AB3100_D1C, + .setting = 0x00 + }, { + .abreg = AB3100_D2C, + .setting = 0x00 + }, { + .abreg = AB3100_D3C, + .setting = 0x00 + }, +}; + +static int __devinit ab3100_setup(struct ab3100 *ab3100) +{ + int err = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(ab3100_init_settings); i++) { + err = ab3100_set_register_interruptible(ab3100, + ab3100_init_settings[i].abreg, + ab3100_init_settings[i].setting); + if (err) + goto exit_no_setup; + } + + /* + * Special trick to make the AB3100 use the 32kHz clock (RTC) + * bit 3 in test register 0x02 is a special, undocumented test + * register bit that only exist in AB3100 P1E + */ + if (ab3100->chip_id == 0xc4) { + dev_warn(ab3100->dev, + "AB3100 P1E variant detected, " + "forcing chip to 32KHz\n"); + err = ab3100_set_test_register_interruptible(ab3100, + 0x02, 0x08); + } + + exit_no_setup: + return err; +} + +/* The subdevices of the AB3100 */ +static struct mfd_cell ab3100_devs[] = { + { + .name = "ab3100-dac", + .id = -1, + }, + { + .name = "ab3100-leds", + .id = -1, + }, + { + .name = "ab3100-power", + .id = -1, + }, + { + .name = "ab3100-regulators", + .id = -1, + }, + { + .name = "ab3100-sim", + .id = -1, + }, + { + .name = "ab3100-uart", + .id = -1, + }, + { + .name = "ab3100-rtc", + .id = -1, + }, + { + .name = "ab3100-charger", + .id = -1, + }, + { + .name = "ab3100-boost", + .id = -1, + }, + { + .name = "ab3100-adc", + .id = -1, + }, + { + .name = "ab3100-fuelgauge", + .id = -1, + }, + { + .name = "ab3100-vibrator", + .id = -1, + }, + { + .name = "ab3100-otp", + .id = -1, + }, + { + .name = "ab3100-codec", + .id = -1, + }, +}; + +struct ab_family_id { + u8 id; + char *name; +}; + +static const struct ab_family_id ids[] __devinitconst = { + /* AB3100 */ + { + .id = 0xc0, + .name = "P1A" + }, { + .id = 0xc1, + .name = "P1B" + }, { + .id = 0xc2, + .name = "P1C" + }, { + .id = 0xc3, + .name = "P1D" + }, { + .id = 0xc4, + .name = "P1E" + }, { + .id = 0xc5, + .name = "P1F/R1A" + }, { + .id = 0xc6, + .name = "P1G/R1A" + }, { + .id = 0xc7, + .name = "P2A/R2A" + }, { + .id = 0xc8, + .name = "P2B/R2B" + }, + /* AB3000 variants, not supported */ + { + .id = 0xa0 + }, { + .id = 0xa1 + }, { + .id = 0xa2 + }, { + .id = 0xa3 + }, { + .id = 0xa4 + }, { + .id = 0xa5 + }, { + .id = 0xa6 + }, { + .id = 0xa7 + }, + /* Terminator */ + { + .id = 0x00, + }, +}; + +static int __devinit ab3100_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct ab3100 *ab3100; + struct ab3100_platform_data *ab3100_plf_data = + client->dev.platform_data; + int err; + int i; + + ab3100 = kzalloc(sizeof(struct ab3100), GFP_KERNEL); + if (!ab3100) { + dev_err(&client->dev, "could not allocate AB3100 device\n"); + return -ENOMEM; + } + + /* Initialize data structure */ + mutex_init(&ab3100->access_mutex); + BLOCKING_INIT_NOTIFIER_HEAD(&ab3100->event_subscribers); + + ab3100->i2c_client = client; + ab3100->dev = &ab3100->i2c_client->dev; + + i2c_set_clientdata(client, ab3100); + + /* Read chip ID register */ + err = ab3100_get_register_interruptible(ab3100, AB3100_CID, + &ab3100->chip_id); + if (err) { + dev_err(&client->dev, + "could not communicate with the AB3100 analog " + "baseband chip\n"); + goto exit_no_detect; + } + + for (i = 0; ids[i].id != 0x0; i++) { + if (ids[i].id == ab3100->chip_id) { + if (ids[i].name != NULL) { + snprintf(&ab3100->chip_name[0], + sizeof(ab3100->chip_name) - 1, + "AB3100 %s", + ids[i].name); + break; + } else { + dev_err(&client->dev, + "AB3000 is not supported\n"); + goto exit_no_detect; + } + } + } + + if (ids[i].id == 0x0) { + dev_err(&client->dev, "unknown analog baseband chip id: 0x%x\n", + ab3100->chip_id); + dev_err(&client->dev, "accepting it anyway. Please update " + "the driver.\n"); + goto exit_no_detect; + } + + dev_info(&client->dev, "Detected chip: %s\n", + &ab3100->chip_name[0]); + + /* Attach a second dummy i2c_client to the test register address */ + ab3100->testreg_client = i2c_new_dummy(client->adapter, + client->addr + 1); + if (!ab3100->testreg_client) { + err = -ENOMEM; + goto exit_no_testreg_client; + } + + err = ab3100_setup(ab3100); + if (err) + goto exit_no_setup; + + err = request_threaded_irq(client->irq, NULL, ab3100_irq_handler, + IRQF_ONESHOT, "ab3100-core", ab3100); + /* This real unpredictable IRQ is of course sampled for entropy */ + rand_initialize_irq(client->irq); + + if (err) + goto exit_no_irq; + + err = abx500_register_ops(&client->dev, &ab3100_ops); + if (err) + goto exit_no_ops; + + /* Set up and register the platform devices. */ + for (i = 0; i < ARRAY_SIZE(ab3100_devs); i++) { + ab3100_devs[i].platform_data = ab3100_plf_data; + ab3100_devs[i].pdata_size = sizeof(struct ab3100_platform_data); + } + + err = mfd_add_devices(&client->dev, 0, ab3100_devs, + ARRAY_SIZE(ab3100_devs), NULL, 0); + + ab3100_setup_debugfs(ab3100); + + return 0; + + exit_no_ops: + exit_no_irq: + exit_no_setup: + i2c_unregister_device(ab3100->testreg_client); + exit_no_testreg_client: + exit_no_detect: + kfree(ab3100); + return err; +} + +static int __devexit ab3100_remove(struct i2c_client *client) +{ + struct ab3100 *ab3100 = i2c_get_clientdata(client); + + /* Unregister subdevices */ + mfd_remove_devices(&client->dev); + + ab3100_remove_debugfs(); + i2c_unregister_device(ab3100->testreg_client); + + /* + * At this point, all subscribers should have unregistered + * their notifiers so deactivate IRQ + */ + free_irq(client->irq, ab3100); + kfree(ab3100); + return 0; +} + +static const struct i2c_device_id ab3100_id[] = { + { "ab3100", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ab3100_id); + +static struct i2c_driver ab3100_driver = { + .driver = { + .name = "ab3100", + .owner = THIS_MODULE, + }, + .id_table = ab3100_id, + .probe = ab3100_probe, + .remove = __devexit_p(ab3100_remove), +}; + +static int __init ab3100_i2c_init(void) +{ + return i2c_add_driver(&ab3100_driver); +} + +static void __exit ab3100_i2c_exit(void) +{ + i2c_del_driver(&ab3100_driver); +} + +subsys_initcall(ab3100_i2c_init); +module_exit(ab3100_i2c_exit); + +MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>"); +MODULE_DESCRIPTION("AB3100 core driver"); +MODULE_LICENSE("GPL"); |