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Release 4.14 drivers/mfd/tps6586x.c

Directory: drivers/mfd
/*
 * 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.
 */

#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/of.h>

#include <linux/mfd/core.h>
#include <linux/mfd/tps6586x.h>


#define TPS6586X_SUPPLYENE	0x14

#define EXITSLREQ_BIT		BIT(1)

#define SLEEP_MODE_BIT		BIT(3)

/* 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

/* device id */

#define TPS6586X_VERSIONCRC	0xcd

/* Maximum register */

#define TPS6586X_MAX_REGISTER	TPS6586X_VERSIONCRC


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),
};


static struct resource tps6586x_rtc_resources[] = {
	{
		.start  = TPS6586X_INT_RTC_ALM1,
		.end	= TPS6586X_INT_RTC_ALM1,
		.flags	= IORESOURCE_IRQ,
        },
};


static const struct mfd_cell tps6586x_cell[] = {
	{
		.name = "tps6586x-gpio",
        },
	{
		.name = "tps6586x-regulator",
        },
	{
		.name = "tps6586x-rtc",
		.num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
		.resources = &tps6586x_rtc_resources[0],
        },
	{
		.name = "tps6586x-onkey",
        },
};


struct tps6586x {
	
struct device		*dev;
	
struct i2c_client	*client;
	
struct regmap		*regmap;
	
int			version;

	
int			irq;
	
struct irq_chip		irq_chip;
	
struct mutex		irq_lock;
	
int			irq_base;
	
u32			irq_en;
	
u8			mask_reg[5];
	
struct irq_domain	*irq_domain;
};


static inline struct tps6586x *dev_to_tps6586x(struct device *dev) { return i2c_get_clientdata(to_i2c_client(dev)); }

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int tps6586x_write(struct device *dev, int reg, uint8_t val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_write(tps6586x->regmap, reg, val); }

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EXPORT_SYMBOL_GPL(tps6586x_write);
int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_bulk_write(tps6586x->regmap, reg, val, len); }

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EXPORT_SYMBOL_GPL(tps6586x_writes);
int tps6586x_read(struct device *dev, int reg, uint8_t *val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); unsigned int rval; int ret; ret = regmap_read(tps6586x->regmap, reg, &rval); if (!ret) *val = rval; return ret; }

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EXPORT_SYMBOL_GPL(tps6586x_read);
int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_bulk_read(tps6586x->regmap, reg, val, len); }

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EXPORT_SYMBOL_GPL(tps6586x_reads);
int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask); }

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EXPORT_SYMBOL_GPL(tps6586x_set_bits);
int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0); }

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EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return regmap_update_bits(tps6586x->regmap, reg, mask, val); }

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EXPORT_SYMBOL_GPL(tps6586x_update);
int tps6586x_irq_get_virq(struct device *dev, int irq) { struct tps6586x *tps6586x = dev_to_tps6586x(dev); return irq_create_mapping(tps6586x->irq_domain, irq); }

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EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
int tps6586x_get_version(struct device *dev) { struct tps6586x *tps6586x = dev_get_drvdata(dev); return tps6586x->version; }

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EXPORT_SYMBOL_GPL(tps6586x_get_version);
static int __remove_subdev(struct device *dev, void *unused) { platform_device_unregister(to_platform_device(dev)); return 0; }

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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) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); mutex_lock(&tps6586x->irq_lock); }

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static void tps6586x_irq_enable(struct irq_data *irq_data) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); unsigned int __irq = irq_data->hwirq; 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) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); unsigned int __irq = irq_data->hwirq; 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) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data); int i; for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) { int ret; ret = tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, tps6586x->mask_reg[i]); WARN_ON(ret); } mutex_unlock(&tps6586x->irq_lock); }

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#ifdef CONFIG_PM_SLEEP
static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on) { struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data); return irq_set_irq_wake(tps6586x->irq, on); }

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#else #define tps6586x_irq_set_wake NULL #endif static struct irq_chip tps6586x_irq_chip = { .name = "tps6586x", .irq_bus_lock = tps6586x_irq_lock, .irq_bus_sync_unlock = tps6586x_irq_sync_unlock, .irq_disable = tps6586x_irq_disable, .irq_enable = tps6586x_irq_enable, .irq_set_wake = tps6586x_irq_set_wake, };
static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq, irq_hw_number_t hw) { struct tps6586x *tps6586x = h->host_data; irq_set_chip_data(virq, tps6586x); irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq); irq_set_nested_thread(virq, 1); irq_set_noprobe(virq); return 0; }

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static const struct irq_domain_ops tps6586x_domain_ops = { .map = tps6586x_irq_map, .xlate = irq_domain_xlate_twocell, };
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\n"); return IRQ_NONE; } acks = le32_to_cpu(acks); while (acks) { int i = __ffs(acks); if (tps6586x->irq_en & (1 << i)) handle_nested_irq( irq_find_mapping(tps6586x->irq_domain, i)); acks &= ~(1 << i); } return IRQ_HANDLED; }

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static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq, int irq_base) { int i, ret; u8 tmp[4]; int new_irq_base; int irq_num = ARRAY_SIZE(tps6586x_irqs); tps6586x->irq = irq; mutex_init(&tps6586x->irq_lock); for (i = 0; i < 5; i++) { tps6586x->mask_reg[i] = 0xff; tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff); } tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp); if (irq_base > 0) { new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1); if (new_irq_base < 0) { dev_err(tps6586x->dev, "Failed to alloc IRQs: %d\n", new_irq_base); return new_irq_base; } } else { new_irq_base = 0; } tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node, irq_num, new_irq_base, &tps6586x_domain_ops, tps6586x); if (!tps6586x->irq_domain) { dev_err(tps6586x->dev, "Failed to create IRQ domain\n"); return -ENOMEM; } ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT, "tps6586x", tps6586x); if (!ret) device_init_wakeup(tps6586x->dev, 1); return ret; }

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static int 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); if (!pdev) { ret = -ENOMEM; goto failed; } pdev->dev.parent = tps6586x->dev; pdev->dev.platform_data = subdev->platform_data; pdev->dev.of_node = subdev->of_node; ret = platform_device_add(pdev); if (ret) { platform_device_put(pdev); goto failed; } } return 0; failed: tps6586x_remove_subdevs(tps6586x); return ret; }

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#ifdef CONFIG_OF
static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) { struct device_node *np = client->dev.of_node; struct tps6586x_platform_data *pdata; pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(&client->dev, "Memory allocation failed\n"); return NULL; } pdata->num_subdevs = 0; pdata->subdevs = NULL; pdata->gpio_base = -1; pdata->irq_base = -1; pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller"); return pdata; }

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static const struct of_device_id tps6586x_of_match[] = { { .compatible = "ti,tps6586x", }, { }, }; #else
static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client) { return NULL; }

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#endif
static bool is_volatile_reg(struct device *dev, unsigned int reg) { /* Cache all interrupt mask register */ if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5)) return false; return true; }

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static const struct regmap_config tps6586x_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = TPS6586X_MAX_REGISTER, .volatile_reg = is_volatile_reg, .cache_type = REGCACHE_RBTREE, }; static struct device *tps6586x_dev;
static void tps6586x_power_off(void) { if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT)) return; tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT); }

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static void tps6586x_print_version(struct i2c_client *client, int version) { const char *name; switch (version) { case TPS658621A: name = "TPS658621A"; break; case TPS658621CD: name = "TPS658621C/D"; break; case TPS658623: name = "TPS658623"; break; case TPS658640: case TPS658640v2: name = "TPS658640"; break; case TPS658643: name = "TPS658643"; break; default: name = "TPS6586X"; break; } dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version); }

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static int tps6586x_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev); struct tps6586x *tps6586x; int ret; int version; if (!pdata && client->dev.of_node) pdata = tps6586x_parse_dt(client); if (!pdata) { dev_err(&client->dev, "tps6586x requires platform data\n"); return -ENOTSUPP; } version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC); if (version < 0) { dev_err(&client->dev, "Chip ID read failed: %d\n", version); return -EIO; } tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL); if (!tps6586x) return -ENOMEM; tps6586x->version = version; tps6586x_print_version(client, tps6586x->version); tps6586x->client = client; tps6586x->dev = &client->dev; i2c_set_clientdata(client, tps6586x); tps6586x->regmap = devm_regmap_init_i2c(client, &tps6586x_regmap_config); if (IS_ERR(tps6586x->regmap)) { ret = PTR_ERR(tps6586x->regmap); dev_err(&client->dev, "regmap init failed: %d\n", ret); return ret; } if (client->irq) { ret = tps6586x_irq_init(tps6586x, client->irq, pdata->irq_base); if (ret) { dev_err(&client->dev, "IRQ init failed: %d\n", ret); return ret; } } ret = mfd_add_devices(tps6586x->dev, -1, tps6586x_cell, ARRAY_SIZE(tps6586x_cell), NULL, 0, tps6586x->irq_domain); if (ret < 0) { dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret); goto err_mfd_add; } ret = tps6586x_add_subdevs(tps6586x, pdata); if (ret) { dev_err(&client->dev, "add devices failed: %d\n", ret); goto err_add_devs; } if (pdata->pm_off && !pm_power_off) { tps6586x_dev = &client->dev; pm_power_off = tps6586x_power_off; } return 0; err_add_devs: mfd_remove_devices(tps6586x->dev); err_mfd_add: if (client->irq) free_irq(client->irq, tps6586x); return ret; }

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Jingoo Han41.00%18.33%
Mark Brown10.25%18.33%
Total402100.00%12100.00%


static int tps6586x_i2c_remove(struct i2c_client *client) { struct tps6586x *tps6586x = i2c_get_clientdata(client); tps6586x_remove_subdevs(tps6586x); mfd_remove_devices(tps6586x->dev); if (client->irq) free_irq(client->irq, tps6586x); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Axel Lin2549.02%125.00%
Mike Rapoport1427.45%125.00%
Laxman Dewangan815.69%125.00%
Gary King47.84%125.00%
Total51100.00%4100.00%

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", .of_match_table = of_match_ptr(tps6586x_of_match), }, .probe = tps6586x_i2c_probe, .remove = tps6586x_i2c_remove, .id_table = tps6586x_id_table, };
static int __init tps6586x_init(void) { return i2c_add_driver(&tps6586x_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport16100.00%1100.00%
Total16100.00%1100.00%

subsys_initcall(tps6586x_init);
static void __exit tps6586x_exit(void) { i2c_del_driver(&tps6586x_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport15100.00%1100.00%
Total15100.00%1100.00%

module_exit(tps6586x_exit); MODULE_DESCRIPTION("TPS6586X core driver"); MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Gary King99934.24%13.70%
Mike Rapoport74425.50%13.70%
Laxman Dewangan60920.87%725.93%
Thierry Reding1625.55%13.70%
Stefan Agner1314.49%13.70%
Bill Huang802.74%13.70%
Stephen Warren602.06%13.70%
Axel Lin491.68%414.81%
Vincent Palatin331.13%13.70%
Mark Brown290.99%27.41%
Alban Bedel110.38%13.70%
Jingoo Han50.17%27.41%
Sachin Kamat30.10%13.70%
Krzysztof Kozlowski10.03%13.70%
Geert Uytterhoeven10.03%13.70%
Marc Dietrich10.03%13.70%
Total2918100.00%27100.00%
Directory: drivers/mfd
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