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drivers/mfd/tps6586x.c
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/* * Core driver for TI TPS6586x PMIC family * * Copyright (c) 2010 CompuLab Ltd. * Mike Rapoport <mike@compulab.co.il> * * Based on da903x.c. * Copyright (C) 2008 Compulab, Ltd. * Mike Rapoport <mike@compulab.co.il> * Copyright (C) 2006-2008 Marvell International Ltd. * Eric Miao <eric.miao@marvell.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ |
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#include <linux/interrupt.h> #include <linux/irq.h> |
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#include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/slab.h> #include <linux/gpio.h> #include <linux/i2c.h> #include <linux/mfd/core.h> #include <linux/mfd/tps6586x.h> /* GPIO control registers */ #define TPS6586X_GPIOSET1 0x5d #define TPS6586X_GPIOSET2 0x5e |
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/* interrupt control registers */ #define TPS6586X_INT_ACK1 0xb5 #define TPS6586X_INT_ACK2 0xb6 #define TPS6586X_INT_ACK3 0xb7 #define TPS6586X_INT_ACK4 0xb8 /* interrupt mask registers */ #define TPS6586X_INT_MASK1 0xb0 #define TPS6586X_INT_MASK2 0xb1 #define TPS6586X_INT_MASK3 0xb2 #define TPS6586X_INT_MASK4 0xb3 #define TPS6586X_INT_MASK5 0xb4 |
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/* device id */ #define TPS6586X_VERSIONCRC 0xcd |
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struct tps6586x_irq_data { u8 mask_reg; u8 mask_mask; }; #define TPS6586X_IRQ(_reg, _mask) \ { \ .mask_reg = (_reg) - TPS6586X_INT_MASK1, \ .mask_mask = (_mask), \ } static const struct tps6586x_irq_data tps6586x_irqs[] = { [TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0), [TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1), [TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2), [TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3), [TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4), [TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5), [TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6), [TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7), [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0), [TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1), [TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2), [TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3), [TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4), [TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5), [TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6), [TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7), [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4), [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03), [TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2), [TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3), [TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0), [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc), [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06), [TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0), [TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5), [TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6), [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1), }; |
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struct tps6586x { struct mutex lock; struct device *dev; struct i2c_client *client; struct gpio_chip gpio; |
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struct irq_chip irq_chip; struct mutex irq_lock; int irq_base; u32 irq_en; u8 mask_cache[5]; u8 mask_reg[5]; |
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}; static inline int __tps6586x_read(struct i2c_client *client, int reg, uint8_t *val) { int ret; ret = i2c_smbus_read_byte_data(client, reg); if (ret < 0) { dev_err(&client->dev, "failed reading at 0x%02x ", reg); return ret; } *val = (uint8_t)ret; return 0; } static inline int __tps6586x_reads(struct i2c_client *client, int reg, int len, uint8_t *val) { int ret; ret = i2c_smbus_read_i2c_block_data(client, reg, len, val); if (ret < 0) { dev_err(&client->dev, "failed reading from 0x%02x ", reg); return ret; } return 0; } static inline int __tps6586x_write(struct i2c_client *client, int reg, uint8_t val) { int ret; ret = i2c_smbus_write_byte_data(client, reg, val); if (ret < 0) { dev_err(&client->dev, "failed writing 0x%02x to 0x%02x ", val, reg); return ret; } return 0; } static inline int __tps6586x_writes(struct i2c_client *client, int reg, int len, uint8_t *val) { |
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int ret, i; |
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for (i = 0; i < len; i++) { ret = __tps6586x_write(client, reg + i, *(val + i)); if (ret < 0) return ret; |
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} return 0; } int tps6586x_write(struct device *dev, int reg, uint8_t val) { return __tps6586x_write(to_i2c_client(dev), reg, val); } EXPORT_SYMBOL_GPL(tps6586x_write); int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val) { return __tps6586x_writes(to_i2c_client(dev), reg, len, val); } EXPORT_SYMBOL_GPL(tps6586x_writes); int tps6586x_read(struct device *dev, int reg, uint8_t *val) { return __tps6586x_read(to_i2c_client(dev), reg, val); } EXPORT_SYMBOL_GPL(tps6586x_read); int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val) { return __tps6586x_reads(to_i2c_client(dev), reg, len, val); } EXPORT_SYMBOL_GPL(tps6586x_reads); int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask) { struct tps6586x *tps6586x = dev_get_drvdata(dev); uint8_t reg_val; int ret = 0; mutex_lock(&tps6586x->lock); ret = __tps6586x_read(to_i2c_client(dev), reg, ®_val); if (ret) goto out; if ((reg_val & bit_mask) == 0) { reg_val |= bit_mask; ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val); } out: mutex_unlock(&tps6586x->lock); return ret; } EXPORT_SYMBOL_GPL(tps6586x_set_bits); int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask) { struct tps6586x *tps6586x = dev_get_drvdata(dev); uint8_t reg_val; int ret = 0; mutex_lock(&tps6586x->lock); ret = __tps6586x_read(to_i2c_client(dev), reg, ®_val); if (ret) goto out; if (reg_val & bit_mask) { reg_val &= ~bit_mask; ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val); } out: mutex_unlock(&tps6586x->lock); return ret; } EXPORT_SYMBOL_GPL(tps6586x_clr_bits); int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask) { struct tps6586x *tps6586x = dev_get_drvdata(dev); uint8_t reg_val; int ret = 0; mutex_lock(&tps6586x->lock); ret = __tps6586x_read(tps6586x->client, reg, ®_val); if (ret) goto out; if ((reg_val & mask) != val) { reg_val = (reg_val & ~mask) | val; ret = __tps6586x_write(tps6586x->client, reg, reg_val); } out: mutex_unlock(&tps6586x->lock); return ret; } EXPORT_SYMBOL_GPL(tps6586x_update); static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset) { struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio); uint8_t val; int ret; ret = __tps6586x_read(tps6586x->client, TPS6586X_GPIOSET2, &val); if (ret) return ret; return !!(val & (1 << offset)); } static void tps6586x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { struct tps6586x *tps6586x = container_of(chip, struct tps6586x, gpio); |
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tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET2, value << offset, 1 << offset); |
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} static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset, int value) { struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio); uint8_t val, mask; tps6586x_gpio_set(gc, offset, value); val = 0x1 << (offset * 2); mask = 0x3 << (offset * 2); return tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET1, val, mask); } |
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static int tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base) |
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{ |
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if (!gpio_base) |
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return 0; |
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tps6586x->gpio.owner = THIS_MODULE; tps6586x->gpio.label = tps6586x->client->name; tps6586x->gpio.dev = tps6586x->dev; tps6586x->gpio.base = gpio_base; tps6586x->gpio.ngpio = 4; tps6586x->gpio.can_sleep = 1; /* FIXME: add handling of GPIOs as dedicated inputs */ tps6586x->gpio.direction_output = tps6586x_gpio_output; tps6586x->gpio.set = tps6586x_gpio_set; tps6586x->gpio.get = tps6586x_gpio_get; |
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return gpiochip_add(&tps6586x->gpio); |
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} static int __remove_subdev(struct device *dev, void *unused) { platform_device_unregister(to_platform_device(dev)); return 0; } static int tps6586x_remove_subdevs(struct tps6586x *tps6586x) { return device_for_each_child(tps6586x->dev, NULL, __remove_subdev); } |
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static void tps6586x_irq_lock(struct irq_data *data) |
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{ |
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); |
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mutex_lock(&tps6586x->irq_lock); } |
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static void tps6586x_irq_enable(struct irq_data *irq_data) |
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{ |
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); unsigned int __irq = irq_data->irq - tps6586x->irq_base; |
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const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask; tps6586x->irq_en |= (1 << __irq); } |
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static void tps6586x_irq_disable(struct irq_data *irq_data) |
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{ |
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); |
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unsigned int __irq = irq_data->irq - tps6586x->irq_base; |
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const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq]; tps6586x->mask_reg[data->mask_reg] |= data->mask_mask; tps6586x->irq_en &= ~(1 << __irq); } |
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static void tps6586x_irq_sync_unlock(struct irq_data *data) |
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{ |
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struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); |
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int i; for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) { if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) { if (!WARN_ON(tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, tps6586x->mask_reg[i]))) tps6586x->mask_cache[i] = tps6586x->mask_reg[i]; } } mutex_unlock(&tps6586x->irq_lock); } static irqreturn_t tps6586x_irq(int irq, void *data) { struct tps6586x *tps6586x = data; u32 acks; int ret = 0; ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(acks), (uint8_t *)&acks); if (ret < 0) { dev_err(tps6586x->dev, "failed to read interrupt status "); return IRQ_NONE; } acks = le32_to_cpu(acks); while (acks) { int i = __ffs(acks); if (tps6586x->irq_en & (1 << i)) handle_nested_irq(tps6586x->irq_base + i); acks &= ~(1 << i); } return IRQ_HANDLED; } static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq, int irq_base) { int i, ret; u8 tmp[4]; if (!irq_base) { dev_warn(tps6586x->dev, "No interrupt support on IRQ base "); return -EINVAL; } mutex_init(&tps6586x->irq_lock); for (i = 0; i < 5; i++) { tps6586x->mask_cache[i] = 0xff; tps6586x->mask_reg[i] = 0xff; tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff); } tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp); tps6586x->irq_base = irq_base; tps6586x->irq_chip.name = "tps6586x"; |
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tps6586x->irq_chip.irq_enable = tps6586x_irq_enable; tps6586x->irq_chip.irq_disable = tps6586x_irq_disable; tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock; tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock; |
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for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) { int __irq = i + tps6586x->irq_base; |
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irq_set_chip_data(__irq, tps6586x); irq_set_chip_and_handler(__irq, &tps6586x->irq_chip, |
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handle_simple_irq); |
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irq_set_nested_thread(__irq, 1); |
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#ifdef CONFIG_ARM set_irq_flags(__irq, IRQF_VALID); #endif } ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT, "tps6586x", tps6586x); if (!ret) { device_init_wakeup(tps6586x->dev, 1); enable_irq_wake(irq); } return ret; } |
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static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x, struct tps6586x_platform_data *pdata) { struct tps6586x_subdev_info *subdev; struct platform_device *pdev; int i, ret = 0; for (i = 0; i < pdata->num_subdevs; i++) { subdev = &pdata->subdevs[i]; pdev = platform_device_alloc(subdev->name, subdev->id); |
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if (!pdev) { ret = -ENOMEM; goto failed; } |
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pdev->dev.parent = tps6586x->dev; pdev->dev.platform_data = subdev->platform_data; ret = platform_device_add(pdev); |
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if (ret) { platform_device_put(pdev); |
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goto failed; |
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} |
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} return 0; failed: tps6586x_remove_subdevs(tps6586x); return ret; } static int __devinit tps6586x_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tps6586x_platform_data *pdata = client->dev.platform_data; struct tps6586x *tps6586x; int ret; if (!pdata) { dev_err(&client->dev, "tps6586x requires platform data "); return -ENOTSUPP; } ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC); if (ret < 0) { dev_err(&client->dev, "Chip ID read failed: %d ", ret); return -EIO; } |
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dev_info(&client->dev, "VERSIONCRC is %02x ", ret); |
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tps6586x = kzalloc(sizeof(struct tps6586x), GFP_KERNEL); if (tps6586x == NULL) return -ENOMEM; tps6586x->client = client; tps6586x->dev = &client->dev; i2c_set_clientdata(client, tps6586x); mutex_init(&tps6586x->lock); |
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if (client->irq) { ret = tps6586x_irq_init(tps6586x, client->irq, pdata->irq_base); if (ret) { dev_err(&client->dev, "IRQ init failed: %d ", ret); goto err_irq_init; } } |
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ret = tps6586x_gpio_init(tps6586x, pdata->gpio_base); if (ret) { dev_err(&client->dev, "GPIO registration failed: %d ", ret); goto err_gpio_init; } |
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ret = tps6586x_add_subdevs(tps6586x, pdata); if (ret) { dev_err(&client->dev, "add devices failed: %d ", ret); goto err_add_devs; } |
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return 0; err_add_devs: |
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if (pdata->gpio_base) { ret = gpiochip_remove(&tps6586x->gpio); if (ret) dev_err(&client->dev, "Can't remove gpio chip: %d ", ret); } err_gpio_init: |
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if (client->irq) free_irq(client->irq, tps6586x); err_irq_init: |
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kfree(tps6586x); return ret; } static int __devexit tps6586x_i2c_remove(struct i2c_client *client) { |
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struct tps6586x *tps6586x = i2c_get_clientdata(client); struct tps6586x_platform_data *pdata = client->dev.platform_data; int ret; |
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if (client->irq) free_irq(client->irq, tps6586x); |
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if (pdata->gpio_base) { ret = gpiochip_remove(&tps6586x->gpio); if (ret) dev_err(&client->dev, "Can't remove gpio chip: %d ", ret); } tps6586x_remove_subdevs(tps6586x); kfree(tps6586x); |
c6c193326 mfd: Add TPS6586x... |
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return 0; } static const struct i2c_device_id tps6586x_id_table[] = { { "tps6586x", 0 }, { }, }; MODULE_DEVICE_TABLE(i2c, tps6586x_id_table); static struct i2c_driver tps6586x_driver = { .driver = { .name = "tps6586x", .owner = THIS_MODULE, }, .probe = tps6586x_i2c_probe, .remove = __devexit_p(tps6586x_i2c_remove), .id_table = tps6586x_id_table, }; static int __init tps6586x_init(void) { return i2c_add_driver(&tps6586x_driver); } subsys_initcall(tps6586x_init); static void __exit tps6586x_exit(void) { i2c_del_driver(&tps6586x_driver); } module_exit(tps6586x_exit); MODULE_DESCRIPTION("TPS6586X core driver"); MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); MODULE_LICENSE("GPL"); |