[mirror_ubuntu-bionic-kernel.git] / drivers / mfd / twl6040-core.c

/*
 * MFD driver for TWL6040 audio device
 *
 * Authors:	Misael Lopez Cruz <misael.lopez@ti.com>
 *		Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
 *		Peter Ujfalusi <peter.ujfalusi@ti.com>
 *
 * Copyright:	(C) 2011 Texas Instruments, Inc.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/twl6040.h>
#include <linux/regulator/consumer.h>

#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
#define TWL6040_NUM_SUPPLIES	(2)

int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
{
	int ret;
	unsigned int val;

	mutex_lock(&twl6040->io_mutex);
	/* Vibra control registers from cache */
	if (unlikely(reg == TWL6040_REG_VIBCTLL ||
		     reg == TWL6040_REG_VIBCTLR)) {
		val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
	} else {
		ret = regmap_read(twl6040->regmap, reg, &val);
		if (ret < 0) {
			mutex_unlock(&twl6040->io_mutex);
			return ret;
		}
	}
	mutex_unlock(&twl6040->io_mutex);

	return val;
}
EXPORT_SYMBOL(twl6040_reg_read);

int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
{
	int ret;

	mutex_lock(&twl6040->io_mutex);
	ret = regmap_write(twl6040->regmap, reg, val);
	/* Cache the vibra control registers */
	if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
		twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
	mutex_unlock(&twl6040->io_mutex);

	return ret;
}
EXPORT_SYMBOL(twl6040_reg_write);

int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
{
	int ret;

	mutex_lock(&twl6040->io_mutex);
	ret = regmap_update_bits(twl6040->regmap, reg, mask, mask);
	mutex_unlock(&twl6040->io_mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_set_bits);

int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
{
	int ret;

	mutex_lock(&twl6040->io_mutex);
	ret = regmap_update_bits(twl6040->regmap, reg, mask, 0);
	mutex_unlock(&twl6040->io_mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_clear_bits);

/* twl6040 codec manual power-up sequence */
static int twl6040_power_up(struct twl6040 *twl6040)
{
	u8 ldoctl, ncpctl, lppllctl;
	int ret;

	/* enable high-side LDO, reference system and internal oscillator */
	ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	if (ret)
		return ret;
	usleep_range(10000, 10500);

	/* enable negative charge pump */
	ncpctl = TWL6040_NCPENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
	if (ret)
		goto ncp_err;
	usleep_range(1000, 1500);

	/* enable low-side LDO */
	ldoctl |= TWL6040_LSLDOENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	if (ret)
		goto lsldo_err;
	usleep_range(1000, 1500);

	/* enable low-power PLL */
	lppllctl = TWL6040_LPLLENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
	if (ret)
		goto lppll_err;
	usleep_range(5000, 5500);

	/* disable internal oscillator */
	ldoctl &= ~TWL6040_OSCENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	if (ret)
		goto osc_err;

	return 0;

osc_err:
	lppllctl &= ~TWL6040_LPLLENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
lppll_err:
	ldoctl &= ~TWL6040_LSLDOENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
lsldo_err:
	ncpctl &= ~TWL6040_NCPENA;
	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
ncp_err:
	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);

	return ret;
}

/* twl6040 manual power-down sequence */
static void twl6040_power_down(struct twl6040 *twl6040)
{
	u8 ncpctl, ldoctl, lppllctl;

	ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
	ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);

	/* enable internal oscillator */
	ldoctl |= TWL6040_OSCENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	usleep_range(1000, 1500);

	/* disable low-power PLL */
	lppllctl &= ~TWL6040_LPLLENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);

	/* disable low-side LDO */
	ldoctl &= ~TWL6040_LSLDOENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);

	/* disable negative charge pump */
	ncpctl &= ~TWL6040_NCPENA;
	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);

	/* disable high-side LDO, reference system and internal oscillator */
	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
}

static irqreturn_t twl6040_naudint_handler(int irq, void *data)
{
	struct twl6040 *twl6040 = data;
	u8 intid, status;

	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);

	if (intid & TWL6040_READYINT)
		complete(&twl6040->ready);

	if (intid & TWL6040_THINT) {
		status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
		if (status & TWL6040_TSHUTDET) {
			dev_warn(twl6040->dev,
				 "Thermal shutdown, powering-off");
			twl6040_power(twl6040, 0);
		} else {
			dev_warn(twl6040->dev,
				 "Leaving thermal shutdown, powering-on");
			twl6040_power(twl6040, 1);
		}
	}

	return IRQ_HANDLED;
}

static int twl6040_power_up_completion(struct twl6040 *twl6040,
				       int naudint)
{
	int time_left;
	u8 intid;

	time_left = wait_for_completion_timeout(&twl6040->ready,
						msecs_to_jiffies(144));
	if (!time_left) {
		intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
		if (!(intid & TWL6040_READYINT)) {
			dev_err(twl6040->dev,
				"timeout waiting for READYINT\n");
			return -ETIMEDOUT;
		}
	}

	return 0;
}

int twl6040_power(struct twl6040 *twl6040, int on)
{
	int audpwron = twl6040->audpwron;
	int naudint = twl6040->irq;
	int ret = 0;

	mutex_lock(&twl6040->mutex);

	if (on) {
		/* already powered-up */
		if (twl6040->power_count++)
			goto out;

		if (gpio_is_valid(audpwron)) {
			/* use AUDPWRON line */
			gpio_set_value(audpwron, 1);
			/* wait for power-up completion */
			ret = twl6040_power_up_completion(twl6040, naudint);
			if (ret) {
				dev_err(twl6040->dev,
					"automatic power-down failed\n");
				twl6040->power_count = 0;
				goto out;
			}
		} else {
			/* use manual power-up sequence */
			ret = twl6040_power_up(twl6040);
			if (ret) {
				dev_err(twl6040->dev,
					"manual power-up failed\n");
				twl6040->power_count = 0;
				goto out;
			}
		}
		/* Default PLL configuration after power up */
		twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
		twl6040->sysclk = 19200000;
		twl6040->mclk = 32768;
	} else {
		/* already powered-down */
		if (!twl6040->power_count) {
			dev_err(twl6040->dev,
				"device is already powered-off\n");
			ret = -EPERM;
			goto out;
		}

		if (--twl6040->power_count)
			goto out;

		if (gpio_is_valid(audpwron)) {
			/* use AUDPWRON line */
			gpio_set_value(audpwron, 0);

			/* power-down sequence latency */
			usleep_range(500, 700);
		} else {
			/* use manual power-down sequence */
			twl6040_power_down(twl6040);
		}
		twl6040->sysclk = 0;
		twl6040->mclk = 0;
	}

out:
	mutex_unlock(&twl6040->mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_power);

int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
		    unsigned int freq_in, unsigned int freq_out)
{
	u8 hppllctl, lppllctl;
	int ret = 0;

	mutex_lock(&twl6040->mutex);

	hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);

	/* Force full reconfiguration when switching between PLL */
	if (pll_id != twl6040->pll) {
		twl6040->sysclk = 0;
		twl6040->mclk = 0;
	}

	switch (pll_id) {
	case TWL6040_SYSCLK_SEL_LPPLL:
		/* low-power PLL divider */
		/* Change the sysclk configuration only if it has been canged */
		if (twl6040->sysclk != freq_out) {
			switch (freq_out) {
			case 17640000:
				lppllctl |= TWL6040_LPLLFIN;
				break;
			case 19200000:
				lppllctl &= ~TWL6040_LPLLFIN;
				break;
			default:
				dev_err(twl6040->dev,
					"freq_out %d not supported\n",
					freq_out);
				ret = -EINVAL;
				goto pll_out;
			}
			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
					  lppllctl);
		}

		/* The PLL in use has not been change, we can exit */
		if (twl6040->pll == pll_id)
			break;

		switch (freq_in) {
		case 32768:
			lppllctl |= TWL6040_LPLLENA;
			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
					  lppllctl);
			mdelay(5);
			lppllctl &= ~TWL6040_HPLLSEL;
			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
					  lppllctl);
			hppllctl &= ~TWL6040_HPLLENA;
			twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
					  hppllctl);
			break;
		default:
			dev_err(twl6040->dev,
				"freq_in %d not supported\n", freq_in);
			ret = -EINVAL;
			goto pll_out;
		}
		break;
	case TWL6040_SYSCLK_SEL_HPPLL:
		/* high-performance PLL can provide only 19.2 MHz */
		if (freq_out != 19200000) {
			dev_err(twl6040->dev,
				"freq_out %d not supported\n", freq_out);
			ret = -EINVAL;
			goto pll_out;
		}

		if (twl6040->mclk != freq_in) {
			hppllctl &= ~TWL6040_MCLK_MSK;

			switch (freq_in) {
			case 12000000:
				/* PLL enabled, active mode */
				hppllctl |= TWL6040_MCLK_12000KHZ |
					    TWL6040_HPLLENA;
				break;
			case 19200000:
				/*
				* PLL disabled
				* (enable PLL if MCLK jitter quality
				*  doesn't meet specification)
				*/
				hppllctl |= TWL6040_MCLK_19200KHZ;
				break;
			case 26000000:
				/* PLL enabled, active mode */
				hppllctl |= TWL6040_MCLK_26000KHZ |
					    TWL6040_HPLLENA;
				break;
			case 38400000:
				/* PLL enabled, active mode */
				hppllctl |= TWL6040_MCLK_38400KHZ |
					    TWL6040_HPLLENA;
				break;
			default:
				dev_err(twl6040->dev,
					"freq_in %d not supported\n", freq_in);
				ret = -EINVAL;
				goto pll_out;
			}

			/*
			 * enable clock slicer to ensure input waveform is
			 * square
			 */
			hppllctl |= TWL6040_HPLLSQRENA;

			twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
					  hppllctl);
			usleep_range(500, 700);
			lppllctl |= TWL6040_HPLLSEL;
			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
					  lppllctl);
			lppllctl &= ~TWL6040_LPLLENA;
			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
					  lppllctl);
		}
		break;
	default:
		dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
		ret = -EINVAL;
		goto pll_out;
	}

	twl6040->sysclk = freq_out;
	twl6040->mclk = freq_in;
	twl6040->pll = pll_id;

pll_out:
	mutex_unlock(&twl6040->mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_set_pll);

int twl6040_get_pll(struct twl6040 *twl6040)
{
	if (twl6040->power_count)
		return twl6040->pll;
	else
		return -ENODEV;
}
EXPORT_SYMBOL(twl6040_get_pll);

unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
{
	return twl6040->sysclk;
}
EXPORT_SYMBOL(twl6040_get_sysclk);

/* Get the combined status of the vibra control register */
int twl6040_get_vibralr_status(struct twl6040 *twl6040)
{
	u8 status;

	status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
	status &= (TWL6040_VIBENA | TWL6040_VIBSEL);

	return status;
}
EXPORT_SYMBOL(twl6040_get_vibralr_status);

static struct resource twl6040_vibra_rsrc[] = {
	{
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource twl6040_codec_rsrc[] = {
	{
		.flags = IORESOURCE_IRQ,
	},
};

static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
{
	/* Register 0 is not readable */
	if (!reg)
		return false;
	return true;
}

static struct regmap_config twl6040_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = TWL6040_REG_STATUS, /* 0x2e */

	.readable_reg = twl6040_readable_reg,
};

static int __devinit twl6040_probe(struct i2c_client *client,
				     const struct i2c_device_id *id)
{
	struct twl6040_platform_data *pdata = client->dev.platform_data;
	struct twl6040 *twl6040;
	struct mfd_cell *cell = NULL;
	int ret, children = 0;

	if (!pdata) {
		dev_err(&client->dev, "Platform data is missing\n");
		return -EINVAL;
	}

	/* In order to operate correctly we need valid interrupt config */
	if (!client->irq || !pdata->irq_base) {
		dev_err(&client->dev, "Invalid IRQ configuration\n");
		return -EINVAL;
	}

	twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
			       GFP_KERNEL);
	if (!twl6040) {
		ret = -ENOMEM;
		goto err;
	}

	twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
	if (IS_ERR(twl6040->regmap)) {
		ret = PTR_ERR(twl6040->regmap);
		goto err;
	}

	i2c_set_clientdata(client, twl6040);

	twl6040->supplies[0].supply = "vio";
	twl6040->supplies[1].supply = "v2v1";
	ret = regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
				 twl6040->supplies);
	if (ret != 0) {
		dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
		goto regulator_get_err;
	}

	ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
	if (ret != 0) {
		dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
		goto power_err;
	}

	twl6040->dev = &client->dev;
	twl6040->irq = client->irq;
	twl6040->irq_base = pdata->irq_base;

	mutex_init(&twl6040->mutex);
	mutex_init(&twl6040->io_mutex);
	init_completion(&twl6040->ready);

	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);

	/* ERRATA: Automatic power-up is not possible in ES1.0 */
	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
		twl6040->audpwron = pdata->audpwron_gpio;
	else
		twl6040->audpwron = -EINVAL;

	if (gpio_is_valid(twl6040->audpwron)) {
		ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
				       "audpwron");
		if (ret)
			goto gpio_err;
	}

	/* codec interrupt */
	ret = twl6040_irq_init(twl6040);
	if (ret)
		goto irq_init_err;

	ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
				   NULL, twl6040_naudint_handler, 0,
				   "twl6040_irq_ready", twl6040);
	if (ret) {
		dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
			ret);
		goto irq_err;
	}

	/* dual-access registers controlled by I2C only */
	twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);

	if (pdata->codec) {
		int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;

		cell = &twl6040->cells[children];
		cell->name = "twl6040-codec";
		twl6040_codec_rsrc[0].start = irq;
		twl6040_codec_rsrc[0].end = irq;
		cell->resources = twl6040_codec_rsrc;
		cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
		cell->platform_data = pdata->codec;
		cell->pdata_size = sizeof(*pdata->codec);
		children++;
	}

	if (pdata->vibra) {
		int irq = twl6040->irq_base + TWL6040_IRQ_VIB;

		cell = &twl6040->cells[children];
		cell->name = "twl6040-vibra";
		twl6040_vibra_rsrc[0].start = irq;
		twl6040_vibra_rsrc[0].end = irq;
		cell->resources = twl6040_vibra_rsrc;
		cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);

		cell->platform_data = pdata->vibra;
		cell->pdata_size = sizeof(*pdata->vibra);
		children++;
	}

	if (children) {
		ret = mfd_add_devices(&client->dev, -1, twl6040->cells,
				      children, NULL, 0);
		if (ret)
			goto mfd_err;
	} else {
		dev_err(&client->dev, "No platform data found for children\n");
		ret = -ENODEV;
		goto mfd_err;
	}

	return 0;

mfd_err:
	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
irq_err:
	twl6040_irq_exit(twl6040);
irq_init_err:
	if (gpio_is_valid(twl6040->audpwron))
		gpio_free(twl6040->audpwron);
gpio_err:
	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
power_err:
	regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
regulator_get_err:
	i2c_set_clientdata(client, NULL);
err:
	return ret;
}

static int __devexit twl6040_remove(struct i2c_client *client)
{
	struct twl6040 *twl6040 = i2c_get_clientdata(client);

	if (twl6040->power_count)
		twl6040_power(twl6040, 0);

	if (gpio_is_valid(twl6040->audpwron))
		gpio_free(twl6040->audpwron);

	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
	twl6040_irq_exit(twl6040);

	mfd_remove_devices(&client->dev);
	i2c_set_clientdata(client, NULL);

	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
	regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);

	return 0;
}

static const struct i2c_device_id twl6040_i2c_id[] = {
	{ "twl6040", 0, },
	{ },
};
MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);

static struct i2c_driver twl6040_driver = {
	.driver = {
		.name = "twl6040",
		.owner = THIS_MODULE,
	},
	.probe		= twl6040_probe,
	.remove		= __devexit_p(twl6040_remove),
	.id_table	= twl6040_i2c_id,
};

module_i2c_driver(twl6040_driver);

MODULE_DESCRIPTION("TWL6040 MFD");
MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:twl6040");
Commit	Line	Data
f19b2823 MLC	1	/*
	2	* MFD driver for TWL6040 audio device
	3	*
	4	* Authors: Misael Lopez Cruz <misael.lopez@ti.com>
	5	* Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
	6	* Peter Ujfalusi <peter.ujfalusi@ti.com>
	7	*
	8	* Copyright: (C) 2011 Texas Instruments, Inc.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	22	* 02110-1301 USA
	23	*
	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/types.h>
	28	#include <linux/slab.h>
	29	#include <linux/kernel.h>
5af7df6b	30	#include <linux/err.h>
f19b2823 MLC	31	#include <linux/platform_device.h>
	32	#include <linux/gpio.h>
	33	#include <linux/delay.h>
8eaeb939 PU	34	#include <linux/i2c.h>
	35	#include <linux/regmap.h>
	36	#include <linux/err.h>
f19b2823 MLC	37	#include <linux/mfd/core.h>
f19b2823 MLC	38	#include <linux/mfd/twl6040.h>
5af7df6b	39	#include <linux/regulator/consumer.h>
f19b2823	40
31b402e3	41	#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
5af7df6b	42	#define TWL6040_NUM_SUPPLIES (2)
31b402e3	43
f19b2823 MLC	44	int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
	45	{
	46	int ret;
8eaeb939	47	unsigned int val;
f19b2823 MLC	48
f19b2823 MLC	49	mutex_lock(&twl6040->io_mutex);
31b402e3 PU	50	/* Vibra control registers from cache */
	51	if (unlikely(reg == TWL6040_REG_VIBCTLL \|\|
	52	reg == TWL6040_REG_VIBCTLR)) {
	53	val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
	54	} else {
8eaeb939	55	ret = regmap_read(twl6040->regmap, reg, &val);
31b402e3 PU	56	if (ret < 0) {
	57	mutex_unlock(&twl6040->io_mutex);
	58	return ret;
	59	}
f19b2823 MLC	60	}
	61	mutex_unlock(&twl6040->io_mutex);
	62
	63	return val;
	64	}
	65	EXPORT_SYMBOL(twl6040_reg_read);
	66
	67	int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
	68	{
	69	int ret;
	70
	71	mutex_lock(&twl6040->io_mutex);
8eaeb939	72	ret = regmap_write(twl6040->regmap, reg, val);
31b402e3 PU	73	/* Cache the vibra control registers */
	74	if (reg == TWL6040_REG_VIBCTLL \|\| reg == TWL6040_REG_VIBCTLR)
	75	twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
f19b2823 MLC	76	mutex_unlock(&twl6040->io_mutex);
	77
	78	return ret;
	79	}
	80	EXPORT_SYMBOL(twl6040_reg_write);
	81
	82	int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
	83	{
	84	int ret;
f19b2823 MLC	85
f19b2823 MLC	86	mutex_lock(&twl6040->io_mutex);
8eaeb939	87	ret = regmap_update_bits(twl6040->regmap, reg, mask, mask);
f19b2823 MLC	88	mutex_unlock(&twl6040->io_mutex);
	89	return ret;
	90	}
	91	EXPORT_SYMBOL(twl6040_set_bits);
	92
	93	int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
	94	{
	95	int ret;
f19b2823 MLC	96
f19b2823 MLC	97	mutex_lock(&twl6040->io_mutex);
8eaeb939	98	ret = regmap_update_bits(twl6040->regmap, reg, mask, 0);
f19b2823 MLC	99	mutex_unlock(&twl6040->io_mutex);
	100	return ret;
	101	}
	102	EXPORT_SYMBOL(twl6040_clear_bits);
	103
	104	/* twl6040 codec manual power-up sequence */
	105	static int twl6040_power_up(struct twl6040 *twl6040)
	106	{
	107	u8 ldoctl, ncpctl, lppllctl;
	108	int ret;
	109
	110	/* enable high-side LDO, reference system and internal oscillator */
	111	ldoctl = TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA;
	112	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	113	if (ret)
	114	return ret;
	115	usleep_range(10000, 10500);
	116
	117	/* enable negative charge pump */
	118	ncpctl = TWL6040_NCPENA;
	119	ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
	120	if (ret)
	121	goto ncp_err;
	122	usleep_range(1000, 1500);
	123
	124	/* enable low-side LDO */
	125	ldoctl \|= TWL6040_LSLDOENA;
	126	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	127	if (ret)
	128	goto lsldo_err;
	129	usleep_range(1000, 1500);
	130
	131	/* enable low-power PLL */
	132	lppllctl = TWL6040_LPLLENA;
	133	ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
	134	if (ret)
	135	goto lppll_err;
	136	usleep_range(5000, 5500);
	137
	138	/* disable internal oscillator */
	139	ldoctl &= ~TWL6040_OSCENA;
	140	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	141	if (ret)
	142	goto osc_err;
	143
	144	return 0;
	145
	146	osc_err:
	147	lppllctl &= ~TWL6040_LPLLENA;
	148	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
	149	lppll_err:
	150	ldoctl &= ~TWL6040_LSLDOENA;
	151	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	152	lsldo_err:
	153	ncpctl &= ~TWL6040_NCPENA;
	154	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
	155	ncp_err:
	156	ldoctl &= ~(TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA);
	157	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	158
	159	return ret;
	160	}
	161
	162	/* twl6040 manual power-down sequence */
163	static void twl6040_power_down(struct twl6040 *twl6040)
164	{
165	u8 ncpctl, ldoctl, lppllctl;
166
167	ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
168	ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
169	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
170
171	/* enable internal oscillator */
172	ldoctl \|= TWL6040_OSCENA;
173	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
174	usleep_range(1000, 1500);
175
176	/* disable low-power PLL */
177	lppllctl &= ~TWL6040_LPLLENA;
178	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
179
180	/* disable low-side LDO */
181	ldoctl &= ~TWL6040_LSLDOENA;
182	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
183
184	/* disable negative charge pump */
185	ncpctl &= ~TWL6040_NCPENA;
186	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
187
188	/* disable high-side LDO, reference system and internal oscillator */
189	ldoctl &= ~(TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA);
190	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
191	}
192
193	static irqreturn_t twl6040_naudint_handler(int irq, void *data)
194	{
195	struct twl6040 *twl6040 = data;
196	u8 intid, status;
197
198	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
199
200	if (intid & TWL6040_READYINT)
201	complete(&twl6040->ready);
202
203	if (intid & TWL6040_THINT) {
204	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
205	if (status & TWL6040_TSHUTDET) {
2d7c957e	206	dev_warn(twl6040->dev,
f19b2823 MLC	207	"Thermal shutdown, powering-off");
	208	twl6040_power(twl6040, 0);
	209	} else {
2d7c957e	210	dev_warn(twl6040->dev,
f19b2823 MLC	211	"Leaving thermal shutdown, powering-on");
	212	twl6040_power(twl6040, 1);
	213	}
	214	}
	215
	216	return IRQ_HANDLED;
	217	}
	218
	219	static int twl6040_power_up_completion(struct twl6040 *twl6040,
	220	int naudint)
	221	{
	222	int time_left;
	223	u8 intid;
	224
	225	time_left = wait_for_completion_timeout(&twl6040->ready,
	226	msecs_to_jiffies(144));
	227	if (!time_left) {
	228	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
	229	if (!(intid & TWL6040_READYINT)) {
2d7c957e	230	dev_err(twl6040->dev,
f19b2823 MLC	231	"timeout waiting for READYINT\n");
	232	return -ETIMEDOUT;
	233	}
	234	}
	235
	236	return 0;
	237	}
	238
	239	int twl6040_power(struct twl6040 *twl6040, int on)
	240	{
	241	int audpwron = twl6040->audpwron;
	242	int naudint = twl6040->irq;
	243	int ret = 0;
	244
	245	mutex_lock(&twl6040->mutex);
	246
	247	if (on) {
	248	/* already powered-up */
	249	if (twl6040->power_count++)
	250	goto out;
	251
	252	if (gpio_is_valid(audpwron)) {
	253	/* use AUDPWRON line */
	254	gpio_set_value(audpwron, 1);
	255	/* wait for power-up completion */
	256	ret = twl6040_power_up_completion(twl6040, naudint);
	257	if (ret) {
2d7c957e	258	dev_err(twl6040->dev,
f19b2823 MLC	259	"automatic power-down failed\n");
	260	twl6040->power_count = 0;
	261	goto out;
	262	}
	263	} else {
	264	/* use manual power-up sequence */
	265	ret = twl6040_power_up(twl6040);
	266	if (ret) {
2d7c957e	267	dev_err(twl6040->dev,
f19b2823 MLC	268	"manual power-up failed\n");
	269	twl6040->power_count = 0;
	270	goto out;
	271	}
	272	}
cfb7a33b PU	273	/* Default PLL configuration after power up */
cfb7a33b PU	274	twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
f19b2823	275	twl6040->sysclk = 19200000;
f8447d6c	276	twl6040->mclk = 32768;
f19b2823 MLC	277	} else {
	278	/* already powered-down */
	279	if (!twl6040->power_count) {
2d7c957e	280	dev_err(twl6040->dev,
f19b2823 MLC	281	"device is already powered-off\n");
	282	ret = -EPERM;
	283	goto out;
	284	}
	285
	286	if (--twl6040->power_count)
	287	goto out;
	288
	289	if (gpio_is_valid(audpwron)) {
	290	/* use AUDPWRON line */
	291	gpio_set_value(audpwron, 0);
	292
	293	/* power-down sequence latency */
	294	usleep_range(500, 700);
	295	} else {
	296	/* use manual power-down sequence */
	297	twl6040_power_down(twl6040);
	298	}
f19b2823	299	twl6040->sysclk = 0;
f8447d6c	300	twl6040->mclk = 0;
f19b2823 MLC	301	}
	302
	303	out:
	304	mutex_unlock(&twl6040->mutex);
	305	return ret;
	306	}
	307	EXPORT_SYMBOL(twl6040_power);
	308
cfb7a33b	309	int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
f19b2823 MLC	310	unsigned int freq_in, unsigned int freq_out)
	311	{
	312	u8 hppllctl, lppllctl;
	313	int ret = 0;
	314
	315	mutex_lock(&twl6040->mutex);
	316
	317	hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
	318	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
	319
2bd05db7 PU	320	/* Force full reconfiguration when switching between PLL */
	321	if (pll_id != twl6040->pll) {
	322	twl6040->sysclk = 0;
	323	twl6040->mclk = 0;
	324	}
	325
cfb7a33b PU	326	switch (pll_id) {
cfb7a33b PU	327	case TWL6040_SYSCLK_SEL_LPPLL:
f19b2823	328	/* low-power PLL divider */
2bd05db7 PU	329	/* Change the sysclk configuration only if it has been canged */
	330	if (twl6040->sysclk != freq_out) {
	331	switch (freq_out) {
	332	case 17640000:
	333	lppllctl \|= TWL6040_LPLLFIN;
	334	break;
	335	case 19200000:
	336	lppllctl &= ~TWL6040_LPLLFIN;
	337	break;
	338	default:
	339	dev_err(twl6040->dev,
	340	"freq_out %d not supported\n",
	341	freq_out);
	342	ret = -EINVAL;
	343	goto pll_out;
	344	}
	345	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	346	lppllctl);
f19b2823	347	}
2bd05db7 PU	348
	349	/* The PLL in use has not been change, we can exit */
	350	if (twl6040->pll == pll_id)
	351	break;
f19b2823 MLC	352
	353	switch (freq_in) {
	354	case 32768:
	355	lppllctl \|= TWL6040_LPLLENA;
	356	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	357	lppllctl);
	358	mdelay(5);
	359	lppllctl &= ~TWL6040_HPLLSEL;
	360	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	361	lppllctl);
	362	hppllctl &= ~TWL6040_HPLLENA;
	363	twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
	364	hppllctl);
	365	break;
	366	default:
2d7c957e	367	dev_err(twl6040->dev,
f19b2823 MLC	368	"freq_in %d not supported\n", freq_in);
	369	ret = -EINVAL;
	370	goto pll_out;
	371	}
f19b2823	372	break;
cfb7a33b	373	case TWL6040_SYSCLK_SEL_HPPLL:
f19b2823 MLC	374	/* high-performance PLL can provide only 19.2 MHz */
f19b2823 MLC	375	if (freq_out != 19200000) {
2d7c957e	376	dev_err(twl6040->dev,
f19b2823 MLC	377	"freq_out %d not supported\n", freq_out);
	378	ret = -EINVAL;
	379	goto pll_out;
	380	}
	381
2bd05db7 PU	382	if (twl6040->mclk != freq_in) {
	383	hppllctl &= ~TWL6040_MCLK_MSK;
	384
	385	switch (freq_in) {
	386	case 12000000:
	387	/* PLL enabled, active mode */
	388	hppllctl \|= TWL6040_MCLK_12000KHZ \|
	389	TWL6040_HPLLENA;
	390	break;
	391	case 19200000:
	392	/*
	393	* PLL disabled
	394	* (enable PLL if MCLK jitter quality
	395	* doesn't meet specification)
	396	*/
	397	hppllctl \|= TWL6040_MCLK_19200KHZ;
	398	break;
	399	case 26000000:
	400	/* PLL enabled, active mode */
	401	hppllctl \|= TWL6040_MCLK_26000KHZ \|
	402	TWL6040_HPLLENA;
	403	break;
	404	case 38400000:
	405	/* PLL enabled, active mode */
	406	hppllctl \|= TWL6040_MCLK_38400KHZ \|
	407	TWL6040_HPLLENA;
	408	break;
	409	default:
	410	dev_err(twl6040->dev,
	411	"freq_in %d not supported\n", freq_in);
	412	ret = -EINVAL;
	413	goto pll_out;
	414	}
f19b2823	415
f19b2823	416	/*
2bd05db7 PU	417	* enable clock slicer to ensure input waveform is
2bd05db7 PU	418	* square
f19b2823	419	*/
2bd05db7	420	hppllctl \|= TWL6040_HPLLSQRENA;
f19b2823	421
2bd05db7 PU	422	twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
	423	hppllctl);
	424	usleep_range(500, 700);
	425	lppllctl \|= TWL6040_HPLLSEL;
	426	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	427	lppllctl);
	428	lppllctl &= ~TWL6040_LPLLENA;
	429	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	430	lppllctl);
	431	}
f19b2823 MLC	432	break;
f19b2823 MLC	433	default:
2d7c957e	434	dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
f19b2823 MLC	435	ret = -EINVAL;
	436	goto pll_out;
	437	}
	438
	439	twl6040->sysclk = freq_out;
f8447d6c	440	twl6040->mclk = freq_in;
cfb7a33b	441	twl6040->pll = pll_id;
f19b2823 MLC	442
	443	pll_out:
	444	mutex_unlock(&twl6040->mutex);
	445	return ret;
	446	}
	447	EXPORT_SYMBOL(twl6040_set_pll);
	448
cfb7a33b	449	int twl6040_get_pll(struct twl6040 *twl6040)
f19b2823	450	{
cfb7a33b PU	451	if (twl6040->power_count)
	452	return twl6040->pll;
	453	else
	454	return -ENODEV;
f19b2823 MLC	455	}
	456	EXPORT_SYMBOL(twl6040_get_pll);
	457
	458	unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
	459	{
	460	return twl6040->sysclk;
	461	}
	462	EXPORT_SYMBOL(twl6040_get_sysclk);
	463
70601ec1 PU	464	/* Get the combined status of the vibra control register */
	465	int twl6040_get_vibralr_status(struct twl6040 *twl6040)
	466	{
	467	u8 status;
	468
	469	status = twl6040->vibra_ctrl_cache[0] \| twl6040->vibra_ctrl_cache[1];
	470	status &= (TWL6040_VIBENA \| TWL6040_VIBSEL);
	471
	472	return status;
	473	}
	474	EXPORT_SYMBOL(twl6040_get_vibralr_status);
	475
0f962ae2 PU	476	static struct resource twl6040_vibra_rsrc[] = {
	477	{
	478	.flags = IORESOURCE_IRQ,
	479	},
	480	};
	481
	482	static struct resource twl6040_codec_rsrc[] = {
	483	{
	484	.flags = IORESOURCE_IRQ,
	485	},
	486	};
	487
8eaeb939	488	static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
f19b2823	489	{
8eaeb939 PU	490	/* Register 0 is not readable */
	491	if (!reg)
	492	return false;
	493	return true;
	494	}
	495
	496	static struct regmap_config twl6040_regmap_config = {
	497	.reg_bits = 8,
	498	.val_bits = 8,
	499	.max_register = TWL6040_REG_STATUS, /* 0x2e */
	500
	501	.readable_reg = twl6040_readable_reg,
	502	};
	503
	504	static int __devinit twl6040_probe(struct i2c_client *client,
	505	const struct i2c_device_id *id)
	506	{
	507	struct twl6040_platform_data *pdata = client->dev.platform_data;
f19b2823 MLC	508	struct twl6040 *twl6040;
	509	struct mfd_cell *cell = NULL;
	510	int ret, children = 0;
	511
	512	if (!pdata) {
8eaeb939	513	dev_err(&client->dev, "Platform data is missing\n");
f19b2823 MLC	514	return -EINVAL;
	515	}
	516
d20e1d21	517	/* In order to operate correctly we need valid interrupt config */
8eaeb939 PU	518	if (!client->irq \|\| !pdata->irq_base) {
8eaeb939 PU	519	dev_err(&client->dev, "Invalid IRQ configuration\n");
d20e1d21 PU	520	return -EINVAL;
	521	}
	522
8eaeb939 PU	523	twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
	524	GFP_KERNEL);
	525	if (!twl6040) {
	526	ret = -ENOMEM;
	527	goto err;
	528	}
	529
bbf6adc1	530	twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
8eaeb939 PU	531	if (IS_ERR(twl6040->regmap)) {
	532	ret = PTR_ERR(twl6040->regmap);
	533	goto err;
	534	}
f19b2823	535
8eaeb939	536	i2c_set_clientdata(client, twl6040);
f19b2823	537
5af7df6b PU	538	twl6040->supplies[0].supply = "vio";
	539	twl6040->supplies[1].supply = "v2v1";
	540	ret = regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
	541	twl6040->supplies);
	542	if (ret != 0) {
	543	dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
	544	goto regulator_get_err;
	545	}
	546
	547	ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
	548	if (ret != 0) {
	549	dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
	550	goto power_err;
	551	}
	552
8eaeb939 PU	553	twl6040->dev = &client->dev;
8eaeb939 PU	554	twl6040->irq = client->irq;
f19b2823 MLC	555	twl6040->irq_base = pdata->irq_base;
	556
	557	mutex_init(&twl6040->mutex);
	558	mutex_init(&twl6040->io_mutex);
	559	init_completion(&twl6040->ready);
	560
	561	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
	562
77f63e06 PU	563	/* ERRATA: Automatic power-up is not possible in ES1.0 */
	564	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
	565	twl6040->audpwron = pdata->audpwron_gpio;
	566	else
	567	twl6040->audpwron = -EINVAL;
	568
f19b2823	569	if (gpio_is_valid(twl6040->audpwron)) {
b04edb93 AL	570	ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
b04edb93 AL	571	"audpwron");
f19b2823	572	if (ret)
5af7df6b	573	goto gpio_err;
f19b2823 MLC	574	}
f19b2823 MLC	575
d20e1d21 PU	576	/* codec interrupt */
	577	ret = twl6040_irq_init(twl6040);
	578	if (ret)
5af7df6b	579	goto irq_init_err;
d20e1d21	580
1b7c4725 PU	581	ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
	582	NULL, twl6040_naudint_handler, 0,
	583	"twl6040_irq_ready", twl6040);
d20e1d21 PU	584	if (ret) {
	585	dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
	586	ret);
	587	goto irq_err;
f19b2823 MLC	588	}
	589
	590	/* dual-access registers controlled by I2C only */
	591	twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
	592
	593	if (pdata->codec) {
0f962ae2 PU	594	int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
0f962ae2 PU	595
f19b2823 MLC	596	cell = &twl6040->cells[children];
f19b2823 MLC	597	cell->name = "twl6040-codec";
0f962ae2 PU	598	twl6040_codec_rsrc[0].start = irq;
	599	twl6040_codec_rsrc[0].end = irq;
	600	cell->resources = twl6040_codec_rsrc;
	601	cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
6c448637 PU	602	cell->platform_data = pdata->codec;
6c448637 PU	603	cell->pdata_size = sizeof(*pdata->codec);
f19b2823 MLC	604	children++;
	605	}
	606
	607	if (pdata->vibra) {
0f962ae2 PU	608	int irq = twl6040->irq_base + TWL6040_IRQ_VIB;
0f962ae2 PU	609
f19b2823 MLC	610	cell = &twl6040->cells[children];
f19b2823 MLC	611	cell->name = "twl6040-vibra";
0f962ae2 PU	612	twl6040_vibra_rsrc[0].start = irq;
	613	twl6040_vibra_rsrc[0].end = irq;
	614	cell->resources = twl6040_vibra_rsrc;
	615	cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
	616
f19b2823 MLC	617	cell->platform_data = pdata->vibra;
	618	cell->pdata_size = sizeof(*pdata->vibra);
	619	children++;
	620	}
	621
	622	if (children) {
8eaeb939	623	ret = mfd_add_devices(&client->dev, -1, twl6040->cells,
f19b2823 MLC	624	children, NULL, 0);
	625	if (ret)
	626	goto mfd_err;
	627	} else {
8eaeb939	628	dev_err(&client->dev, "No platform data found for children\n");
f19b2823 MLC	629	ret = -ENODEV;
	630	goto mfd_err;
	631	}
	632
	633	return 0;
	634
	635	mfd_err:
1b7c4725	636	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
f19b2823	637	irq_err:
d20e1d21	638	twl6040_irq_exit(twl6040);
5af7df6b	639	irq_init_err:
f19b2823 MLC	640	if (gpio_is_valid(twl6040->audpwron))
f19b2823 MLC	641	gpio_free(twl6040->audpwron);
5af7df6b PU	642	gpio_err:
	643	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
	644	power_err:
	645	regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
	646	regulator_get_err:
8eaeb939	647	i2c_set_clientdata(client, NULL);
8eaeb939	648	err:
f19b2823 MLC	649	return ret;
	650	}
	651
8eaeb939	652	static int __devexit twl6040_remove(struct i2c_client *client)
f19b2823	653	{
8eaeb939	654	struct twl6040 *twl6040 = i2c_get_clientdata(client);
f19b2823 MLC	655
	656	if (twl6040->power_count)
	657	twl6040_power(twl6040, 0);
	658
	659	if (gpio_is_valid(twl6040->audpwron))
	660	gpio_free(twl6040->audpwron);
	661
1b7c4725	662	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
d20e1d21	663	twl6040_irq_exit(twl6040);
f19b2823	664
8eaeb939 PU	665	mfd_remove_devices(&client->dev);
8eaeb939 PU	666	i2c_set_clientdata(client, NULL);
f19b2823	667
5af7df6b PU	668	regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
	669	regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
	670
f19b2823 MLC	671	return 0;
	672	}
	673
8eaeb939 PU	674	static const struct i2c_device_id twl6040_i2c_id[] = {
	675	{ "twl6040", 0, },
	676	{ },
	677	};
	678	MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
	679
	680	static struct i2c_driver twl6040_driver = {
	681	.driver = {
	682	.name = "twl6040",
	683	.owner = THIS_MODULE,
	684	},
f19b2823 MLC	685	.probe = twl6040_probe,
f19b2823 MLC	686	.remove = __devexit_p(twl6040_remove),
8eaeb939	687	.id_table = twl6040_i2c_id,
f19b2823 MLC	688	};
f19b2823 MLC	689
8eaeb939	690	module_i2c_driver(twl6040_driver);
f19b2823 MLC	691
	692	MODULE_DESCRIPTION("TWL6040 MFD");
	693	MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
	694	MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
	695	MODULE_LICENSE("GPL");
	696	MODULE_ALIAS("platform:twl6040");